| Relative Armor Penetration of Jacketed Lead, Solid Copper, Solid Brass, and Steel Core Bullets |
30 Nov 2012 |
5 pages |
| Authors:
Maggie Sherrill; Rachael B Powers; Michael Courtney; Amy Courtney; AIR FORCE ACADEMY COLORADO SPRINGS CO
|
 | The relative armor penetration ability of different kinds of projectiles is of general interest from both offensive and defensive viewpoints in law enforcement and military applications. This paper presents data on armor penetration of four different projectile types (all in 5.56mm NATO) on both 6.35mm thick steel plate (A36) and proprietary glass/aramid composite armor. The bullet penetrating steel plate most readily was the M855 bullet which has a steel penetrator ... |
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| Protection Technologies -- Challenges and Opportunities |
Oct 2012 |
22 pages |
| Authors:
Wendy A Winner; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
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| The Impact of Armor on the Design, Utilization and Survivability of Ground Vehicles: The History of Armor Development and Use |
Sep 2012 |
125 pages |
| Authors:
Chun H Yap; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Armor is a key component of ground vehicle survivability, as has been developed and redesigned throughout history in response to different threats and missions. This thesis aims to study and analyze the how armor has changed through major conflicts, from World War I to Operation Iraqi Freedom, and some of the driving factors that influenced those changes. This thesis would also do a discussion on the threats ground vehicles are ... |
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| Research of the Effects of Integration into Armor on the Performanec of Spintronic Microwave Detectors |
Aug 2012 |
7 pages |
| Authors:
Elena Bankowski; Thomas Meitzler; Tomas Pesys; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
| The authors studied the effects of different types of armor on the performance of spin-torque microwave detectors (STMD). Working prototypes of novel nano-sized spintronic sensors of microwave radiation for battlefield anti-radar and wireless communications applications are being integrated into Sensor Enhanced Armor (SEA) and Multifunctional Armor (MFA) and tested in SEA-NDE Lab at TARDEC. The preliminary theoretical estimations have shown that STMD based on the spin-torque effect in magnetic tunnel ... |
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| Origin of the 44-mm Behind-Armor Blunt Trauma Standard |
Aug 2012 |
14 pages |
| Authors:
Erin Hanlon; Patrick Gillich; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD SURVIVABILITY-LETHALITY ANALYSIS DIRECTORATE
|
| A number of armed assaults on public officials occurred in the early 1970s, which prompted the Lightweight Soft Body Armor Program to develop modern, concealable, soft body armor. Methodology needed to be developed to (1) determine the effectiveness of the soft body armor to stop bullet penetration and (2) assess the potential injury from nonpenetrating blunt impacts to the body. Extensive research was performed under the program to develop methodologies ... |
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| General Tests of Personal Protective Equipment (Non-ballistic) - Soft Armor |
23 Jul 2012 |
61 pages |
| Authors:
ABERDEEN TEST CENTER MD
|
| This Test Operations Procedure (TOP) describes general procedures for conducting nonballistic testing of soft armor systems. Tests include Bulk Materials, Visual Inspection, Bartacks, Component and Assembly, Construction Design, Emergency Release Mechanism, Functional Integration, Hardware, Label Verification: Verbiage, Label Verification: Dimensions and Font, Open Seam, Stitch Count, Stitch and Seam Type, Raw Edges, Stitch Tension, Thread Ends, Weight, Materials Inspection Testing, Ballistic Filler Weight, Ballistic Panel Subcomponent Fit and Area, Bartack ... |
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| Expanding the Availability of Lightweight Aluminum Alloy Armor Plate Procured From Detailed Military Specifications |
Jul 2012 |
12 pages |
| Authors:
Kevin Doherty; Richard Squillacioti; Bryan Cheeseman; Brian Placzankis; Denver Gallardy; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| For many years, the range of aluminum alloys for armor plate applications obtainable in accordance with detailed military specifications was very limited. However, the development of improved aluminum alloys for aerospace and other applications has provided an opportunity to modernize the Army portfolio for ground vehicle armor applications. While the benefits of offering additional alloy choices to vehicle designers is obvious, the process of creating detailed military specifications for armor ... |
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| Does V50 Depend on Armor Mass? |
30 May 2012 |
7 pages |
| Authors:
Christine Haight; Kadie McNamara; Michael Courtney; AIR FORCE ACADEMY COLORADO SPRINGS CO
|
| This experiment considers whether V50 depends on the mass of an armor sample when the material and thickness are constant. V50 is the velocity at which 50% of the shots are stopped by the armor. It was hypothesized that V50 values determined using lighter armor samples may be overly optimistic because lighter armor samples have more rearward motion during impact thus requiring more velocity for penetration. V50 was determined for ... |
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| Self-Cooling Gradient Shell for Body Armor |
10 May 2012 |
28 pages |
| Authors:
Igor Luzinov; Konstantin G Komev; CLEMSON UNIV SC SCHOOL OF MATERIALS SCIENCE AND ENGINEERING
|
| Current methods of reducing physiological strain on a soldier wearing armor vest need significant improvement. To this end, the major objective of this work was to conduct research on development of effective lightweight evaporative cooling system capable of delivering significant cooling effect without or with minimal power requirements and additional weight load. During the project we developed major methodology and equipment to measure cooling power and temperature effect of virtually ... |
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| Fabrication of High-Strength Lightweight Metals for Armor and Structural Applications |
05 Apr 2012 |
5 pages |
| Authors:
Vladimir M Segal; ENGINEERED PERFORMANCE MATERIALS COMPANY LLC WHITMORE LAKE MI
|
| A new conceptual design of ECAE die for plate billets was developed and tested. The die provides semi-continuous processing pass-by-pass without reshaping and preheating, satisfies conditions of industrial operation, and presents potential to scale up ECAE for bulk plates and sheets. The new processing technology ECAE + warm rolling was demonstrated for aluminum armor alloy AA 5083. High strength armor plates (YS = 397 MPa, UTS = 446 MPa, EL ... |
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| An Investigation of Three Extremity Armor Systems: Determination of Physiological, Biomechanical, and Physical Performance Effects and Quantification of Body Area Coverage |
19 Mar 2012 |
79 pages |
| Authors:
Leif Hasselquist; Carolyn K Bensel; Brian Corner; Karen N Gregorczyk; ARMY NATICK SOLDIER RESEARCH DEVELOPMENT AND ENGINEERING CENTER MA
|
| This report documents an evaluation of three personal protective systems designed to be worn with armor vests for the ballistic protection of the arms and legs. The systems were similar in weight (6 kg), but differed in the extent of the body surface area they covered. Eleven Army enlisted men participated in the assessment of the relative effects of the extremity armor and of an armor vest worn alone on ... |
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| Structural Health Monitoring of M1114 High Mobility Multipurpose Wheeled Vehicle Armor System |
Mar 2012 |
107 pages |
| Authors:
Frank T Sha; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The M1114 High Mobility Multipurpose Wheeled Vehicle (HMMWV) has been the workhorse vehicle of the U.S. Armed Forces in Afghanistan and Iraq. Donald Rumsfeld, Secretary of Defense, was faced with massive public criticism in 2004 for not equipping our military personnel in Afghanistan and Iraq with M1114s that had the proper ballistic armor. In May 2004, a $618M Senate Bill was passed to increase the production level of HMMWVs and ... |
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| Leveraging Army Unique Mission Requirements to Advance the State-of-the-Art in Adhesives Development |
Mar 2012 |
10 pages |
| Authors:
Robert Jensen; Wendy K Chaney; Daniel DeSchepper; David Flanagan; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| The selection and substitution of materials is the keystone of successful engineering. Ground vehicle armor represents a complex and broad spectrum of possible designs that are continually evolving to meet the protection needs imposed by everemerging threats. Adhesive selection plays a critical role in lightweight armor design. Hence, it is vital to capture, consolidate, and organize adhesive data in a meaningful way for both engineering design and material advancement. Many ... |
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| Embedded Health Monitoring for Glass Like Armor |
13 Feb 2012 |
9 pages |
| Authors:
Thomas J Meitzler; Samuel E Ebenstein; Thomas P Reynolds; Jason Schrader; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
| The authors describe a technique they developed to perform optical non-destructive evaluation of glass like armor which is inexpensive, available everywhere and the output is easy to understand. |
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| Lessons Learned Converting an Application for Determining Armor Health from the Laboratory to TRL6 |
02 Feb 2012 |
13 pages |
| Authors:
Thomas Meitzler; Thomas Reynolds; Jason Schrader; Jeffrey Schultz; Samuel Ebenstein; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
| The Sensor Enhanced Armor (SEA) team has developed a method and algorithm for determining the health of Stryker ceramic armor panels. This method has been described in detail in several previous reports which are listed in the references. The method was developed and tested using a laboratory computer; however, this computer is not suitable for use in the field due to its size, weight and electrical requirements. This report documents ... |
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| Constitutive Model Parameter Study For Armor Steel And Tungsten Alloys |
Jan 2012 |
18 pages |
| Authors:
Stephen J Schraml; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| A computational parametric study was performed to assess the influence of the selection of Johnson-Cook constitutive model parameters on the numerical simulation of tungsten rods penetrating rolled homogeneous armor (RHA) steel targets. The parameter space involved two sets of Johnson-Cook model parameters for RHA, two sets of Johnson-Cook parameters for the tungsten rod material, four tungsten rod length-to-diameter (L/D) ratios, and two continuum mechanics codes. Striking velocities considered in the ... |
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| Lightening Body Armor: Arroyo Support to the Army Response to Section 125 of the National Defense Authorization Act for Fiscal Year 2011 |
Jan 2012 |
67 pages |
| Authors:
Kenneth Horn; Kimberlie Biever; Kenneth Burkman; Paul DeLuca; Lewis Jamison; Michael Kolb; Aatif Sheikh; RAND ARROYO CENTER SANTA MONICA CA
|
| The body armor that U.S. forces wear in Afghanistan is effective against ballistic threats: There have not been any known penetrations of the body armor or fatalities when the currently issued body armor was struck by projectiles it was designed to stop. However, the combat loads that dismounted soldiers and marines carry on patrol are very heavy, and a large portion of this load is due to body armor. Congress ... |
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| Embedded Non-Destructive Evaluation for Glass Armor |
05 Dec 2011 |
21 pages |
| Authors:
Thomas Meitzler; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
| The U.S. Army has developed a new kind of armor protection for vehicles which consists of several glass plates. The plates are inserted in a plastic box and epoxy material is used to prevent the plates from being damaged by moving inside the box. To prevent the plates from chipping, the plastic box is encased in a steel box. The typical NDE procedure for this type of armor is to ... |
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| Prototype Reactive Armor Fabrication |
30 Nov 2011 |
7 pages |
| Authors:
David E Cain; CAIN (DAVID E) CONSULTING NEW BRAUNFELS TX
|
| Development of mfg technology, materials, and production of spectra-shield based composite armor, including: (6) C Kits, (1) B Kit, (1) upper and lower objective set was successfully complete. |
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| A Method and Device for Health Monitoring of Glass Armor |
11 Nov 2011 |
12 pages |
| Authors:
Thomas J Meitzler; Thomas Reynolds; Samuel Ebenstein; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
| A method and device for health monitoring of glass armor plates is described. Because the armor plates are enclosed in a steel box for protection, visual inspection can't be used. Traditional inspection requires dismounting the armor from the vehicle, and then using a high energy X-ray machine. Removing the armor from the vehicle is very time consuming and labor intensive, and the X-ray machine is expensive and often not available ... |
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| Constraint-based Hybrid Cellular Automaton Topology Optimization for Advanced Lightweight Blast Resistant Structure Development |
Nov 2011 |
44 pages |
| Authors:
Jr Hofstetter Dwight; Rahul Gupta; Robert Bitting; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| Optimization of blast-resistant structures for combat vehicles allows for maximum protection when constrained by additional weight. Livermore Software Topology and Shape Computations (LS-TaSC) optimization software is a constraint-based hybrid cellular-automaton tool that could be used to design optimum solutions. This software takes into account size, shape, topology, and topometry (changing of element properties on an element-by-element basis). The optimization is achieved by designing for a uniform internal energy density while ... |
|
| Tom Cat Designs LLC Protective Hull Modeling & Simulation Results for Iteration 1 |
24 Oct 2011 |
62 pages |
| Authors:
Sebastian Karwaczynski; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
| This briefing looks at proposed protective underbody kit and analysis through simulation. |
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| After Effects of Welding Armor Steels |
31 Aug 2011 |
26 pages |
| Authors:
Matt Rogers; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
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| Non-Destructive Testing of Sensor Enhanced Armor |
09 AUG 2011 |
7 pages |
| Authors:
Thomas Reynolds; Thomas J. Meitzler; Samuel Ebenstein; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
| The US Army is replacing conventional armor with new types of ballistic protection which are lighter in weight than the materials they replace yet offer the same degree of protection. A key component of this new type of armor is called Multi Functional (MFA) or Sensor Enhanced Armor (SEA) because the armor provides more capabilities than traditional ballistic protection for the soldier and ground vehicle. In this paper we shall ... |
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| Antenna Development for Multifunctional Armor Applications Using Embedded Spin-Torque Nano-Oscillator (STNO) as a Microwave Detector |
09 AUG 2011 |
9 pages |
| Authors:
Elena Bankowski; Thomas Meitzler; Steve Zielinski; Andrei Slavin; Vasil Tiberkevich; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
| Recent advances in spintronics resulted in the development of a new class of radiation-resistant nano-sized microwave devices - spin-torque nano-oscillators (STNO). To use these novel nano-scale devices in wireless communications system as either microwave sources or detectors it is necessary to develop antennas coupled to STNO and providing efficient radiation and reception of microwave radiation. We demonstrate that it is possible to design antennas of a sub-wavelength size that have ... |
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| Ballistic Testing for Interceptor Body Armor Inserts Needs Improvement |
01 AUG 2011 |
50 pages |
| Authors:
INSPECTOR GENERAL DEPT OF DEFENSE ARLINGTON VA
|
| We are performing a series of Interceptor Body Armor audits in response to a congressional request. This audit evaluated product quality assurance for seven Army contracts, valued at $2.5 billion, for ballistic inserts awarded between 2004 and 2006. Specifically, we determined whether the results for First Article Tests (FATs) and Lot Acceptance Tests (LATs) met contract requirements and whether quality assurance personnel performed the product quality surveillance in accordance with ... |
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| Soft Body Armor: An Overview of Materials, Manufacturing, Testing, and Ballistic Impact Dynamics |
01 Aug 2011 |
34 pages |
| Authors:
Paul V Cavallaro; NAVAL UNDERSEA WARFARE CENTER DIV NEWPORT RI
|
| This report documents the development of today's soft body armors including their designs, materials, manufacturing methods, National Institute of Justice ballistic and North Atlantic Treaty Organization fragment threat categories, and qualification testing requirements. Material characteristics are discussed for each of the multiple material dimensional scales, which include the molecular, fiber, yarn, and fabric scales. Ballistic impact effects on single fibers and both single and multilayered woven fabrics are presented as ... |
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| Numerical Analysis Study of the Failure Mechanism of Transparent Materials During Low Velocity Impact Used in Protective Systems |
Jul 2011 |
12 pages |
| Authors:
C G Fountzoulas; R E Brennan; J M Sands; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| The rapid advancement of computing power and recent advances in numerical techniques and material models have resulted in accurate simulation of ballistic impacts into multi-layer transparent armor configurations. Transparent and opaque materials are used in protective systems for enhancing survivability of ground vehicles, air vehicles, and personnel. Transparent materials are utilized for face shields, riot gear, and vehicle windows, in addition to other applications for sensor protection, including radomes and ... |
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| An Approach to Analyze Personnel Injury of Reflective Spall from Small-Arms Protective Body Armor |
Jul 2011 |
16 pages |
| Authors:
Rebecca VanAmburg; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD SURVIVABILITY/LETHALITY ANALYSIS DIRECTORATE
|
| Fragmenting debris from ballistic impacts defeated by the protective plates in body armor, also known as reflective spall, has the potential to injure personnel wearing the protective plate. This has not been evaluated in the past due to difficulties in data collection as well as a lack of information on whether or not there is a legitimate risk of injury. Our objective was to develop a test procedure and analysis ... |
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| Conformable Self-Healing Ballistic Armor |
28 Jun 2011 |
7 pages |
| Authors:
George A Daniels; Paul A Petrovich; DEPARTMENT OF THE ARMY WASHINGTON DC
|
| A conformable self-healing ballistic armor protective structure has a shell formed of a laminated cloth material having outer and inner lamellae. The outer lamella of the laminated material is a ballistic cloth and the inner lamella is a soft, conformable self-healing, rubber compound. The shell is filled preferably with multiplicity of ceramic particles disposed in a fluid. |
|
| TARDEC Annual Report 2010 |
15 Jun 2011 |
71 pages |
| Authors:
Jerry Aliotta; Mike Roddin; Derhun Sanders; Grace Bochenek; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
| The pages of this Annual Report will reveal a list of TARDEC's accomplishments, and we are certainly proud that our people have accomplished these dynamic things and embraced our creed to be innovative, knowledgeable always learning, and focused. You ll find many examples of our associates commitment to these principles in the following pages. Our dedication spans the five technology focus areas at TARDEC: Ground Vehicle Power and Mobility (GVPM), ... |
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| Ballistic Protection |
14 JUN 2011 |
21 pages |
| Authors:
Jeffrey A. Koshko; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
| Further mature and develop weight / space trades to reduce cost of the threshold CVAD armor for GCV Develop GCV objective threat armor system while meeting platform weight, space and cost goals Advance electro-magnetic armor systems maturity Develop smart armor with embedded, real-time health monitoring capability. |
|
| Ballistic Protection |
06 JUN 2011 |
6 pages |
| Authors:
Jeffrey A. Koshko; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
|
| Dynamic Material Properties of Orthotropic Polymer and Molybdenum for Use in Next Generation Composite Armor Concept? |
JUN 2011 |
131 pages |
| Authors:
Jonathan R. Garner; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Dyneema HB-25 is an orthotropic polyethylene fiber-epoxy matrix material that is being investigated for use in a next generation layered armor concept. Dyneema was chosen due to its high variation in sound speeds in the through direction and along the fiber direction, thereby making it a good candidate for a wave spreading layer in our proposed armored layer concept. The shock properties in the through fiber direction have been investigated ... |
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| Critical Adhesive Needs for Army Applications and Opportunities for Innovation |
Jun 2011 |
8 pages |
| Authors:
Robert Jensen; Wendy Kosik; Jared Gardner; Daniel O'Brien; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| The goals of this research are to communicate the challenges of adhesive bonding for Army applications, present empirical correlations between relatively simple quasi-static coupon level testing and observed ballistic damage modes, present academic challenges that must be overcome, and outline a course for minimal preliminary qualification standards that must be fulfilled for any adhesive to be considered for potential Army ground vehicle applications that encourage novel research and development into ... |
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| Novel Adhesives Innovation Through Forward Looking Specifications Requirements and Database Implementation |
Jun 2011 |
8 pages |
| Authors:
Wendy Kosik; Richard Squillacioti; Wayne Ziegler; Jared Gardner; Robert Jensen; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| The U.S. Department of Defense is tasked to respond to a wide range of asymmetric threats with speed and efficiency. Historically, the time required for moving new materials and processing technologies from research to application is roughly 40 years. The Department of the Army is actively moving toward a culture of innovation where experimentation and prudent risk taking are not only encouraged but admired. Advanced materials are the foundation to ... |
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| The Ballistic and Corrosion Evaluation of Magnesium Elektron E675 vs. Baseline Magnesium Alloy AZ31B and Aluminum Alloy 5083 for Armor Applications |
Jun 2011 |
52 pages |
| Authors:
Tyrone Jones; Brian Placzankis; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| The U.S. Army Research Laboratory has evaluated the ballistic and corrosion performance of high-strength magnesium alloy Elektron 675 for use in vehicle and personnel protection. The performance of Elektron 675 is compared to baseline magnesium alloy AZ31B and baseline aluminum alloy 5083 (AA5083). While Mg alloy E675 offers a higher ballistic protection at equal weight, Elektron 675 did not pass the corrosion resistance requirement specified in military specification MIL-DTL-32333. The ... |
|
| Exploiting Combat Experience: The U.S. Forces European Theater Study of Mechanized Cavalry Units |
19 MAY 2011 |
74 pages |
| Authors:
Christopher N. Prigge; ARMY COMMAND AND GENERAL STAFF COLL FORT LEAVENWORTH KS SCHOOL OF ADVANCED MILITARY STUDIES
|
| The U.S. Forces European Theater General Board study of mechanized cavalry units illustrates how a systemic study of combat experience can guide interconnected changes to military doctrine, organizations, and equipment. The General Board conducted its study of mechanized cavalry units between September 1945 and January 1946. The study's final report recommended that the Army create a corps cavalry regiment that would perform the full range of traditional horse cavalry missions, ... |
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| Materials for Ground Platform Survivability |
17 May 2011 |
20 pages |
| Authors:
Douglas Templeton; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI GROUND SYSTEMS SURVIVABILITY OFFICE
|
| Discusses the attributes, capability gaps and required capabilities of armor, both body and vehicular. |
|
| First Principles Calculation of Stress Induced Amorphization in Armor Ceramics |
May 2011 |
24 pages |
| Authors:
D E Taylor; T W Wright; J W McCauley; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| Recent experimental work within the U.S. Army Research Laboratory has identified the formation of nanoscale-sized intragranular amorphous bands leading to a marked reduction in ballistic performance of boron carbide (B4C). This pressureinduced amorphization has been examined through application of the Born stability criterion that imposes restrictions on the relative magnitudes of the elastic constants of a stable crystal. The analysis has been conducted for B4C as a function of structural ... |
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| Evaluating the Stability of a Metric for Determining the Health of Armor Plates |
04 Apr 2011 |
9 pages |
| Authors:
Thomas J Meitzler; Thomas Reynolds; Samuel Ebenstein; Gregory Smith; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
| A method for evaluating the stability of a metric for determining the health of armor plates is presented. The metric is based on the following basic premise: The amplitudes and locations of the major vibrational modes of an undamaged armor plate constitute a basic ?signature? of the armor plate. Damaging the armor plate should cause changes to both the amplitude and position of the significant vibrational modes. A metric has ... |
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| How Body Pressure Distribution Can Map Soldier Comfort |
21 MAR 2011 |
16 pages |
| Authors:
Michael Megiveron; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
| Body Pressure Distribution is shown to help describe a military seat's comfort. It compliments but doesn't replace absorbed power. Metrics can only compare seats subject dependent. It is difficult to measure interaction of subject, body armor and seat back. Best test method needs to be determined. Until process can be refined, questionnaires and other subjective data is still needed in seat evaluations. |
|
| Effects of Surface Treatment and Interfacial Strength on the Damage Propagation in Layered Transparent Armor under Impact |
20 MAR 2011 |
32 pages |
| Authors:
Weinong W. Chen; PURDUE UNIV LAFAYETTE IN SCHOOL OF MATERIALS SCIENCE AND ENGINEERING
|
| This research program is to develop a fundamental understanding of the damage propagation through layered transparent armors under impact loading conditions. The effects of surface quality and interfacial bonding strength on the damage propagation or arrest will also be examined. During the funded period of the program, a gas gun has been developed and used to impact layered glass targets. Notched glass specimens having adhesive interfaces are impacted with plastic ... |
|
| Autonomous Vehicle Panel 2011 Pacific Operations Science and Technology Conference |
16 MAR 2011 |
14 pages |
| Authors:
Grace Bochenek; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
| MAST CTA: Basic Research for Micro-System * ROBOTICS CTA: Fundamental Robotics Research * MAGIC: International Robotics Challenge * RDP's: Research and Demonstration. |
|
| Development of a Blast Event Simulation Process for Multi-Scale Modeling of Composite Armor for Light Weight Vehicles (PREPRINT) |
15 MAR 2011 |
24 pages |
| Authors:
John P. Kim; Nicholas Vlahopoulos; Geng Zhang; MICHIGAN UNIV ANN ARBOR DEPT OF MECHANICAL ENGINEERING
|
| This paper presents the development of a multi-scale simulation process for modeling the response of a vehicle with composite armor to the blast loads from an explosive threat. The new process can be used for improving the blast resistant capabilities of the composite armor by configuring its properties at the micro-level. A Blast Event Simulation system (BEST) that facilitates the easy use of LS-DYNA or ABAQUS for conducting a complete ... |
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| Lightweight Integrally Armored Floor (LIAF) Ballistic Testing |
Mar 2011 |
9 pages |
| Authors:
Mark E Robeson; ARMY AVIATION AND MISSILE RESEARCH DEVELOPMENT AND ENGINEERING CENTER FORT EUSTIS VA AVIATION APPLIED TECHNOLOGY DIRECTORATE
|
| As part of the Lightweight Integrally Armored Floor agreement between the Aviation Applied Technology Directorate and United Technologies Research Center, ballistic testing was conducted on six armored floor system test specimens. The purpose of this ballistic testing was twofold: to evaluate the performance of test specimen configurations against the 7.62x39 mm PS Ball projectile, and to provide data for improved ballistic modeling capability. The general configuration for each of the ... |
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| COMPOSITE CERAMIC ARMOR DEFECT ANALYSIS USING PHASED ARRAY ULTRASOUND |
30 Jan 2011 |
15 pages |
| Authors:
J S Steckenrider; Thomas J Meitzler; Lisa Prokurat-Franks; W A Ellingson; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
| A series of 16-inch square by 2-inch thick, multi-layered ceramic composite armor specimens, some of which had intentional design defects inserted between the layers, were inspected using a 128 element, 10MHz immersion phased array ultrasound system. To overcome some of the issues associated with the acoustic wave propagation in layered media, two digital signal processing methods (Fast Fourier Transform (FFT) and Wiener filtering) were employed. While previous work has been ... |
|
| Bio-inspired Armor Protective Material Systems for Ballistic Shock Mitigation |
Jan 2011 |
10 pages |
| Authors:
Jinhua Huang; Helen Durden; Mostafiz Chowdhury; M4 ENGINEERING INC LONG BEACH CA
|
| Severe transient ballistic shocks from projectile impacts, mine blasts, or overhead artillery attacks can incapacitate an occupant at low frequencies, or sensitive equipment at high frequencies, if they are not properly attenuated by armor protective systems. Unique challenges exist in developing armor protective systems for mitigating both low and high frequency ballistic shocks due to the lack of robust design methodology, the severe dynamic loading conditions, and the uncertainties in ... |
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| Determination of Dynamic Response of Ceramics and Ceramic-Metals Under Shock Compression and Spall |
Dec 2010 |
93 pages |
| Authors:
Chin W Tan; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| A new composite armor concept that encompasses an extremely hard first layer to deform the projectile, an orthotropic second layer to slow down the shock wave propagation, a third porous layer to absorb the shock wave energy through PV-work, and a fourth layer to provide confinement for the porous medium has been conceived. Ceramic Corbit-98 and Ceramet Tungsten Carbide were selected as candidate materials for the first layer and these ... |
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| Reactive Structure and Smart Armor for Army's Future Ground Vehicles |
DEC 2010 |
10 pages |
| Authors:
David Chiyo; Suhasa B. Kodandaramaiah; Karl Grosh; Zheng-Dong Ma; Basavaraju Raju; Farzad Rostam-Abadi; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
|
| An Reactive Structure Technology (RST) is being developed, where a Reactive Structure is defined as a new class of smart structure that can react to external excitations (such as a ballistic or blast impact) in a carefully designed way to counteract the hazardous loading or perform other desired tasks. Two prototypes of the reactive structure have been designed and fabricated for proving the concept of RST. The prototype basically consists ... |
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Armor
