| Bragg Grating Fiber Optic Based Nondestructive Evaluation (NDE) |
SEP 2001 |
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| Authors:
H. T. Yolken; George A. Matzkanin; NONDESTRUCTIVE TESTING INFORMATION ANALYSIS CENTER AUSTIN TX
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 | Fiber optic Bragg grating sensors coupled with a variety of demodulation or readout techniques offer an elegant means to monitor the processing or health of materials in a variety of applications. Laboratory research has demonstrated the feasibility of using fiber optic Bragg grating sensors to determine strain and temperature in structures, monitor the processing of composites, monitor adhesive joints, serve as chemical sensors and corrosion detection sensors, and to detect ... |
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| Probability of Detection (POD) for Nondestructive Evaluation (NDE) |
AUG 2001 |
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| Authors:
George A. Matzkanin; H. T. Yolken; NONDESTRUCTIVE TESTING INFORMATION ANALYSIS CENTER AUSTIN TX
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| The issues of POD and NDE reliability have received considerable attention from the research community over the last few years. Certainly part of the impetus for this movement is the realization that successful life management of the increasing inventory of aging systems depends on the ability to quantify NDE procedure capability and reliability. The accepted method of NDE capability quantification, the POD curve, shows the probability of a flaw's detection ... |
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| Nondestructive Evaluation (NDE) of Advanced Fiber Reinforced Polymer Composites |
JUL 2001 |
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| Authors:
H. T. Yolken; George A. Matzkanin; Jill E. Bartel; NONDESTRUCTIVE TESTING INFORMATION ANALYSIS CENTER AUSTIN TX
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| Fiber reinforced polymer composite materials continue to be used in a large number of applications ranging from aerospace to automotive, industrial and consumer products. The high stiffness-to-weight ratio, low electromagnetic reflectance, and the ability to embed sensors and actuators have made fiber reinforced composites an attractive alternative construction material for primary aircraft structures. In many other cases fiber reinforced polymer composite materials are being developed and used to replace metal ... |
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| Application of NDE for the Process Control of Metal Matrix Composite Fabrication |
OCT 94 |
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| Authors:
George A. Matzkanin
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| Metal Matrix Composites (MMC) are of considerable interest to the Department of Defense as well as various commercial enterprises. However, to date, MMC applications are sparse and fragmented and no true volume applications exist. Among a number of technology advancement barriers mentioned in a recent report which adversely affect the MMC area are production cost and lack of suitable nondestructive evaluation and inspection (NDE/I) techniques. In an effort to help ... |
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| Nondestructive Characterization of Heat Damage in Graphite/Epoxy Composites: A State-of-the-Art Report |
APR 93 |
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| Authors:
George A. Matzkanin; NONDESTRUCTIVE TESTING INFORMATION ANALYSIS CENTER AUSTIN TX*
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| The degradation in properties of advanced composites, such as graphite/epoxy, by exposure to elevated temperatures is an important problem to the Navy as well as other DoD components and governmental agencies, such as, NASA, DoE, and FAA. In naval aircraft, graphite/epoxy composite materials may be exposed to damaging levels of heat as a result of fire or operational service. Studies have shown that exposures to temperatures in the range of ... |
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| Conference on Characterization and NDE of Heat Damage in Graphite Epoxy Composites |
APR 93 |
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| Authors:
Paul G. Kenny; George A. Matzkanin; NONDESTRUCTIVE TESTING INFORMATION ANALYSIS CENTER AUSTIN TX*
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| This Proceedings contains fourteen papers presented at the Conference on Characterization and NDE of Heat Damage in Graphite/Epoxy Composites. Primary coverage areas are: Quantifying Physical and Mechanical Property Changes Induced by Heat Damage; Characterization Methods for Heat Damage; NDE; Correlations between NDE and Heat-Induced Property Changes. (Author/Modified). |
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| Nondestructive Inspection of Bridge Components Using Magnetic Flux Leakage |
92 |
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| Authors:
George A. Matzkanin; Thomas W. Stephens
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| In response to the need for better nondestructive inspection techniques for aging infrastructures, Texas Research Institute Austin (TRI/ austin) is developing a new inspection system for bridge components under FHWA sponsorship. The Magnetic Flux Leakage Inspection System (MFLIS) is being developed to detect deterioration (corrosion and fatigue) due to aging of main cables of suspension bridges and steel elements in prestressed concrete beams. The MFLIS under development is based on ... |
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| nde of suspension bridge cables using a recently developed magnetic perturbation cable (mpc) inspection system |
OCT 90 |
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| Authors:
Cecil M. Teller; George A. Matzkanin; sidney a. suhler
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| this paper presents an overview of a recently developed inspection system for suspension bridge cables, namely, the magnetic perturbation cable (mpc) system, and a summary of results obtained during laboratory tests and field trials. laboratory measurements on two stay-cable specimens subjected to fatigue cycling showed that the mpc system is capable of detecting single-wire fatigue fractures in 0.2-inch diameter wires in the outermost strands of seven- wire strand stay-cables having ... |
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| To the Detection of Bondline Flaws in Rubber/Metal Laminates a Comparison of the Sensitivity of Transverse and Lamb Waves |
90 |
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| Authors:
Cecil M. Teller; K. J. Diercks; George A. Matzkanin
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| Application of oblique incidence ultrasonic techniques for the evaluation of rubber-to-metal adhesive bonds is reported. Measurements using different wave modes were made on 6 in. square steel specimens 1/4 and 1/8 inc. thick to which 1/8 in. thick rubber was adhesively bonded. The relative effectiveness of transverse and Lamb waves for detection, delineation and evaluation of differing bondline conditions and bondline flaws was investigated. Measurements were made at frequencies from ... |
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| DETECTION AND DISCRIMINATION OF BOND SURFACE VARIATIONS IN RUBBER/METAL LAMINATES USING OBLIQUELY INCIDENT ULTRASONIC WAVES |
17 APR 89 |
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| Authors:
K. Jerome Diercks; Leonard A. Hale; George A. Matzkanin
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| scans of bonded rubber-to-metal specimens were performed using an incidence angle of 20 deg re normal to the surface of the metal adherend (cold- rolled ss304 plate). this angle is greater than the critical angle for exciting compressional waves in the plate, but less than that for exciting transverse waves. other, e.g., lamb, waves may also be excited, but at a relatively much lower amplitude. the measured parameter was the ... |
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| A Review of Nondestructive Characterization of Composites Using NMR |
89 |
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| Authors:
George A. Matzkanin
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| This paper presents reviews, including an extensive list of references, of recent and current work on nondestructive characterization of composites using NMR imaging for solids. (Author/Modified). |
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| NONDESTRUCTIVE EVALUATION OF ADHESIVE BONDS USING NUCLEAR MAGNETIC RESONANCE |
NOV 87 |
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| Authors:
George A. Matzkanin; A. De Los Santos; J. D. King
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| in this paper, the authors present a summary of results obtained from investigations of nmr for the nde of adhesive bonds. potential applications which are discussed include adhesive bonding problems such as determination of adhesive degradation during storage, cure monitoring during the adhesive bonding process, and nde and characterization of completed bonds. also described are nmr instrumentation systems which have been developed for practical nde applications of nmr to adhesive ... |
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| Nondestructive Evaluation of Composites Using Pulsed NMR |
04 MAY 87 |
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| Authors:
George A. Matzkanin
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| This paper describes the use of nuclear magnetic resonance (NMR) to evaluate organic matrix composites and other polymer based materials. (NTIAC/ gta). |
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| NDE METHOD SELECTION: AN AI APPROACH |
APR 87 |
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| Authors:
frank a. iddings; Pamela K. Fink; George A. Matzkanin
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| this paper describes an ai system which has been devised to assist the individual by helping to provide selection of an nde method for a specific set of circumstances. the system eliminates single-expert biases by offering effective alternative methodologies. the system also supplies the name and telephone number of an expert who can be called upon for assistance. (ntiac) |
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| Nondestructive Testing Information Analysis Center, FY 1986 Annual Report |
OCT 86 |
73 pages |
| Authors:
George A. Matzkanin; SOUTHWEST RESEARCH INST SAN ANTONIO TX
|
 | This report reviews the continuing operations of the Nondestructive Testing Information Analysis Center (NTIAC) for the FY86 period from 01 October 1985 to 30 September 1986. Activities and accomplishments of the Center are discussed in terms of the major work areas: Information Acquisition, Data Base Development, Technical Publications, Inquiry Services, Current Awareness, Promotion, Special Studies, and Management. Future plans for growth and improvement of the Center are also included. Keywords: ... |
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| NONDESTRUCTIVE CHARACTERIZATION OF KEVLAR COMPOSITES USING PULSED NMR |
JUL 86 |
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| Authors:
George A. Matzkanin; Armando De Los Santos
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| the work reported in this paper was directed at using pulsed nmr to characterize the moisture in kevlar fiber, neat resin (both cured and uncured), kevlar prepreg, and kevlar reinforced composite. the hydrogen nmr signals were analyzed to obtain information on the characteristic states of moisture in these constituent materials and to determine the capabilities of nmr for determining degraded resin. (author/ntiac) |
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| APPLICATION OF SPATIALLY LOCALIZED NMR TO NONDESTRUCTIVE EVALUATION |
NOV 85 |
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| Authors:
George A. Matzkanin
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| in recent years, spectacular advancements have taken place in the development of spatially localized nuclear magnetic resonance (nmr) for medical imaging. these nmr methods provide information on the spatial distribution of a selected nuclear species and, in more advanced apparatus, the distribution of the selected species in particular binding states. although present medical nmr imaging systems are not generally suitable for industrial nde because the nmr properties of solid materials ... |
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| ACE/AACE Inspection and Analysis Handbook. Part 1. Management |
30 JUN 85 |
26 pages |
| Authors:
Douglas C. Brauer; Daniel Henry; George A. Matzkanin; NONDESTRUCTIVE TESTING INFORMATION ANALYSIS CENTER SAN ANTONIO TX
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| This is the Airframe Condition Evaluation and Aircraft Analytical Corrosion Evaluation (ACE/AACE) inspection and analysis handbook which was prepared to provide U.S. Army Aviation Systems Command (AVSCOM) managers, commanders of operational units, engineers, team members, and others with a practical reference document of criteria, guidelines, and other information applicable to the ACE/AACE program. The handbook is in the three parts: Part I- Management, Part II-Engineering, and Part III-Profiling. Aircraft inspection; ... |
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| ACE/AACE Inspection and Analysis Handbook. Part 2. Engineering |
30 JUN 85 |
49 pages |
| Authors:
Douglas C. Brauer; Daniel Henry; George A. Matzkanin; NONDESTRUCTIVE TESTING INFORMATION ANALYSIS CENTER SAN ANTONIO TX
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| This is the Airframe Condition Evaluation and Aircraft Analytical Corrosion Evaluation (ACE/AACE) inspection and analysis handbook which was prepared to provide U.S. Army Aviation Systems Command (ACSCOM) managers, commanders of operational units, engineers, team members, and others with a practical reference document of criteria, guidelines, and other information applicable to the ACE/AACE program. The handbook is in three parts: Part I- Management, Part II-Engineering, and Part III-Profiling. Aircraft inspection; Nondestructive ... |
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| ACE/AACE Inspection and Analysis Handbook. Part 3. Profiling |
30 JUN 85 |
53 pages |
| Authors:
Douglas C. Brauer; Daniel Henry; George A. Matzkanin; NONDESTRUCTIVE TESTING INFORMATION ANALYSIS CENTER SAN ANTONIO TX
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| This is the Airframe Condition Evaluation and Aircraft Analytical Corrosion Evaluation (ACE/AACE) inspection and analysis handbook which was prepared to provide U.S. Army Aviation Systems Command (AVSCOM) managers, commanders of operational units, engineers, team members, and others with a practical reference document of criteria, guidelines, and other information applicable to the ACE/AACE program. The handbook is in three parts: Part I- Management, Part II-Engineering, and Part III-Profiling. Aircraft inspection; Nondestructive ... |
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| Depot Maintenance Handbook |
30 JUN 85 |
67 pages |
| Authors:
David C. Brauer; Daniel Henry; George A. Matzkanin; NONDESTRUCTIVE TESTING INFORMATION ANALYSIS CENTER SAN ANTONIO TX
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| The Depot Maintenance Handbook was developed to help ensure the continued efficient and effective manner in which maintenance is performed at the Corpus Christi Army Depot. This handbook is directed to engineers, on-line maintenance personnel, and others who are involved in the planning and performance of maintenance at the depot level. It provides reference information for engineers so that they may effectively address AVSCOM Engineering Directives (AEDs) and AVSCOM Engineering ... |
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| NONDESTRUCTIVE EVALUATION OF INFRASTRUCTURE CONDITIONS |
DEC 84 |
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| Authors:
George A. Matzkanin; Lewis S. Fountain; Oren Tranbarger
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| this paper describes the assessment of available nde technology for tunnel inspection, laboratory evaluation of selected candidate methods on simulation test structures, and preliminary results of field evaluation of pulsed frequency-modulated continuous-wave (fm-cw) radar, in actual subway tunnels. (ntiac) |
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| APPLICATIONS OF NUCLEAR MAGNETIC RESONANCE TO THE NDE OF COMPOSITES |
APR 83 |
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| Authors:
George A. Matzkanin
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| interest is increasing in applying nuclear magnetic resonance (nmr) techniques to a number of nde problems involving organic matrix fiber reinforced composites and other polymer based materials. although the most obvious application is the measurement of moisture, other problems which nmr is capable of addressing include environmental degradation, modulus variations, degree of cure, impact damage, and aging. experimental results on glass fiber and kevlar fiber composites in several of these ... |
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| Nondestructive Evaluation of Fiber Reinforced Composites. A State-of- the-Art Survey. Volume I. NDE of Graphite Fiber-Reinforced Plastic Composites. Part I. Radiography and Ultrasonics |
MAR 1982 |
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| Authors:
George A. Matzkanin; NONDESTRUCTIVE TESTING INFORMATION ANALYSIS CENTER SAN ANTONIO TX
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| Composite materials are being increasingly used as structural components because of their high strength-to-weight ratio. In fact, advanced structural composites are rapidly finding their way from aerospace applications into automotive, industrial, and consumer products. From a technical standpoint, advanced plastic matrix composites could easily replace metal or load-bearing components in structures in many consumer and industrial products. Composites offer some of the standard advantages of plastics processing. A number of ... |
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| DETERMINATION OF MOISTURE IN FIBER REINFORCED COMPOSITES USING PULSED NMR |
JUN 81 |
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| Authors:
George A. Matzkanin
|
| investigations were conducted of nuclear magnetic resonance (nmr) signals from hydrogen atoms in two organic matrix composite systems subjected to environmental conditioning at 51.6 deg c (125 deg f) and 95% relative humidity. the composite systems were 8 ply, plus or minus 45 deg laminates fabricated from sp 250 resin/52 glass fiber and reliabond 9350 resin/kevlar 49 fiber. free induction decay nmr signals from the composite specimens consisted of a ... |
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| NONDESTRUCTIVE MEASUREMENT OF MOISTURE IN CONCRETE USING PULSED NMR |
APR 81 |
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| Authors:
George A. Matzkanin; J. Derwin King; William L. Rollwitz
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| the objective of this research is to develop a practical nde method for measuring the moisture content in reinforced portland cement concrete structures, such as bridge decks. nuclear magnetic resonance (nmr) was selected as a method showing promise for fulfilling the project objectives, in particular, the need for a noninvasive method capable of distinguishing water molecules in different binding states. results of laboratory tests conducted on a variety of concrete ... |
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| The Barkhausen Effect and its Application to Nondestructive Evaluation |
OCT 79 |
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| Authors:
George A. Matzkanin; Robert E. Beissner; Cecil M. Teller; NONDESTRUCTIVE TESTING INFORMATION ANALYSIS CENTER SAN ANTONIO TX
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| Report includes a brief overview of experimental and theoretical principles underlying the Barkhausen effect and a discussion of NDE applications. (Author/Modified). |
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| MAGNETIC RESONANCE METHODS FOR NDE |
APR 79 |
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| Authors:
J. Derwin King; William L. Rollwitz; George A. Matzkanin
|
| MAGNETIC RESONANCE METHODS PROVIDE THE OPPORTUNITY FOR MAKING IMPORTANT NDE MEASUREMENTS THAT ARE DIFFICULT, AND MANY TIMES IMPOSSIBLE, BY OTHER SENSORY TECHNIQUES. LIMITATIONS ON SAMPLE SIZE AND CONFIGURATION, OPERATIONAL RESTRAINTS, AND APPARATUS SIZE, WEIGHT AND COST HAVE LIMITED THE PRACTICAL UTILITY OF MAGNETIC RESONANCE METHODS IN THE PAST BUT RECENT DEVELOPMENTS HAVE PROVIDED MEANS FOR OVERCOMING MANY OF THESE OBSTACLES. THESE ADVANCES HAVE GREATLY EXPANDED THE POTENTIAL OF NUCLEAR MAGNETIC ... |
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| Nondestructive Evaluation of Fiber Reinforced Epoxy Composites: A State-of-the-Art Survey. |
APR 1979 |
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| Authors:
George A. Matzkanin; Gary L. Burkhardt; Cecil M. Teller; SOUTHWEST RESEARCH INST SAN ANTONIO TEX
|
| This report contains the essential findings of a comprehensive survey of the state-of-the-art in nondestructive evaluation (NDE) of fiber reinforced epoxy composites with emphasis on the types presently used or planned for use in Army helicopter components. Primary consideration is given to the NDE of glass fiber composites because of its extensive use in the fabrication of advanced helicopter rotor blades with secondary consideration given to the NDE of Kevlar, ... |
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Reports by Author
