| A Novel Structural Health Management Approach for Steel Bridges |
Feb-2009 |
42 pages |
| Authors:
Vincent Hock; Michael Miller; Richard Lampo; Robert Mason; Lawrence Gintert; Mark Singleton; Steven Sweeney; Keith Chandler; CONCURRENT TECHNOLOGIES CORP JOHNSTOWN PA
|
 | OBJECTIVES: Demonstrate and validate state-of-the-art and remote structural health and corrosion degradation monitoring of steel bridges * Employ system on two subject bridges to greatly reduce risk of catastrophic failure by providing advance warning of growing structural problems caused by corrosion/materials degradation * Subject Bridge 1 -1-20 Bridge, Vicksburg, MS - Steel truss through deck - About 23,000 vehicles per day - Westward movement of bridge piers E-1 and E02 ... |
|
| Protective Measures for Basecamp Living Quarters |
DEC 2004 |
3 pages |
| Authors:
Michael J. Roth; Nicholas Boone; Pamela Kinnebrew; Bart Durst; Toney Cummins; Thomas Slawson; Bill Heard; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS
|
| The implementation of protective measures in base camp living quarter areas is one of the greatest challenges currently facing the Army force protection community. These areas are heavily populated with soft-sided structures used to house soldiers and civilians. Because of the dense layout and low protection levels, they have proven to be viable targets for terrorist attack. The United States Army Corps of Engineers (USACE), Engineer Research and Development Center ... |
|
| Effective Use of Weld Metal Hydrogen Trapping and Advance Diffusible Hydrogen Sensing |
2004 |
40 pages |
| Authors:
David L. Olson; Yeong-Do Park; COLORADO SCHOOL OF MINES GOLDEN DEPT OF METALLURGICAL ENGINEERING
|
| The development of an advance measuring apparati for diffusible hydrogen content based on electronic, optical and magnetic property measurements was investigated. The effort was to develop a rapid and accurate determination for both steel weld metal diffusible hydrogen content and its distribution. This investigation used the instrumentation acquired by the DURIP grant program. Thermoelectric (Seebeck) coefficient measurements are used to assess hydrogen content in higher strength low alloy steel, nickel-aluminum ... |
|
| Ultra-light Structural Steel from Metal Foams |
28 MAY 1999 |
23 pages |
| Authors:
Joseph C. Runkle; ULTRACLAD CORP ANDOVER MA
|
| It was the objective of this activity to make metal steel foam panelswith low carbon steel face sheets by hot isostatic pressing. Panels were successfully made with strontium carbonate foaming agent by both HIP plus foam and HIP plus forge plus foam. Resulting foam density was 50%, representing the best steel foam to date using Fraunhofer USA Delaware technology. It is planned to apply foam steel structural panels in applications ... |
|
| Mechanical Threshold Stress Constitutive Strength Model Description of HY-100 Steel |
16 APR 1999 |
46 pages |
| Authors:
D. M. Goto; J. Bingert; R. K. Garrett Jr.; Shuh- Rong Chen; George T. Gray III; NAVAL SURFACE WARFARE CENTER INDIAN HEAD DIV MD
|
| The mechanical threshold stress (MTS) approach is employed to characterize the constitutive stress-strain response of HY-100 steel. A generalized, three-term MTS strength model currently considers athermal, thermal, and strain-hardening contributions to flow stress. Aspects of the MTS framework pertinent to Navy HY steels are discussed, and a calibration methodology is presented for determining MTS strength model parameters. In addition, a linear strain-hardening modification to ... |
|
| Dynamic Failure Behavior of Naval Structural Steels |
30 SEP 1998 |
16 pages |
| Authors:
Min Zhou; GEORGIA TECH RESEARCH CORP ATLANTA
|
| The objective of this two year research is to: (1) characterize the dynamic constitutive behavior of structural metals including HY-80, HY-100, HSLA-80, HSLA-100, 4340 and Ti-6A1-4V; (2) evaluate the factors that determine their dynamic shear failure resistance; and (3) obtain experimental quantification of the failure resistance of these materials. A combined experimental and numerical approach has been employed in the investigation. The work ... |
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| High Performance Steel Development for Highway Bridge Construction: A cooperative Effort |
AUG 97 |
29 pages |
| Authors:
Eric M. Focht; NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
|
| High Performance Steels (HPS) for highway bridge applications are being developed under a cooperative agreement between the FHWA, the AISI and the U.S. Navy. This combined and coordinated effort has culminated in the production of low carbon weathering steels which exhibit excellent strength, toughness and weldability at the 485 MPa (70 ksi) and 690 MPa (100 ksi) yield strength levels. The production heats of these HPS's meet the current mechanical ... |
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| Engineering and Design: Responsibility for Hydraulic Steel Structures |
31 JAN 1997 |
8 pages |
| Authors:
CORPS OF ENGINEERS WASHINGTON DC
|
| This regulation defines engineering responsibilities for design of hydraulic steel structures, and for engineering inspection and evaluation during construction and operation of the project. |
|
| Proceedings of the Joint Seminar; Hydrogen Management in Steel Weldments, Melbourne, Australia, 23rd October 1996 |
1997 |
|
| Authors:
D. L. Olson; I. Maroef; C. Lensing; R. D. Smith; W. W. Wang; COLORADO SCHOOL OF MINES GOLDEN
|
 | Despite 50 years of research into the prevention of hydrogen induced cracking in weldments, this form of cracking is still the most serious problem facing the steel fabrication industry today. Increased performance for defence platforms requires stronger lighter structures which have largely been obtained using high strength steels. As the strength is increased, so is the risk of hydrogen induced cracking after welding. To address this issue, the management of ... |
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| Ductile Fracture and Failure Criteria of Structural Steels |
JUN 96 |
39 pages |
| Authors:
D. A. Koss; PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF MATERIALS SCIENCE AND ENGINEE RING
|
| Progress is reviewed for a program which examines multiaxial failure criteria and the associated mechanisms of ductile fracture in structural steels using HY100 as a model system. Failure limit diagram data are presented for the dependence of failure initiation of HY100 over a range of multiaxial tensile stresses and microstructural conditions including material heat treated to simulate heat-affected zone material in a weldment. An analysis of experimental observations suggests two ... |
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| Observations of Star Fracture and Longitudinal Splitting in BIS 812 EMA and Q1N Submarine Construction Steels |
MAR 95 |
|
| Authors:
I. A. Burch; D. S. Saunders; DEFENCE SCIENCE AND TECHNOLOGY ORGANIZATION CANBERRA (AUSTRALIA)
|
| The tensile properties and fracture behaviour of two submarine construction steels, BIS 812 EMA and Q1N, have been studied. Their properties and fracture behaviour were measured over a wide range of test temperatures utilizing plain and notched tensile specimens. The yield strength of both materials was found to increase with decreasing temperature and the fracture surface appearance of these steels was also temperature dependent. Under certain conditions star fracture was ... |
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| Engineering and Design: Structural Steel Connections |
22 JUL 1994 |
5 pages |
| Authors:
CORPS OF ENGINEERS WASHINGTON DC
|
| This regulation prescribes the policy and procedures for the design and approval of structural steel connections for military construction projects. |
|
| Establishment of a Uniform Format for Data Reporting of Structural Material Properties for Reliability Analysis |
30 JUN 94 |
114 pages |
| Authors:
L. N. Pussegoda; A. S. Dinovitzer; L. Malik; FLEET TECHNOLOGY LTD KANATA (ONTARIO)
|
| A material property gathering format is proposed with the objective that the database so developed be suitable for deriving statistical measures (mean values, standard deviations, types of distributions) of the property required by reliability and design Engineers. Emphasis is placed on strength and toughness properties of marine steels and their welds. The format developed and reported in the SSC report 352 was modified by incorporating the findings from a review ... |
|
| Ductile Fracture and Failure Criteria of Structural Steels |
20 JUN 94 |
13 pages |
| Authors:
D. A. Koss; PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF MATERIALS SCIENCE AND ENGINEE RING
|
| Progress is reviewed for a program which examines aspects of ductile fracture of structural steels. The research seeks to establish multiaxial failure criteria which have sufficient microstructural sensitivity to account for variations in microstructure such that fracture initiation can be predicted. The research involves both experimental and computational analysis. Progress for the period March 1, to May 31, 1994 is reviewed for (1) the initiation of a study of failure ... |
|
| Development of a Field Method to Measure Out-Of-Flatness of Structural Steel Plates |
AUG 93 |
57 pages |
| Authors:
Todd T. Tamura; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
|
| The out-of-flatness of structural steel plates in bolted connections can prevent desired bolt tensions from being achieved, even when specified installation procedures are used. A bolt in a connection of out-of-flat plate elements will have a unique bolt-loosening response because of its relative position in the connection and its tightening order. Bolts tensioned adequately may lose a significant portion of their tension as the joint is completed, particularly those tightened ... |
|
| Advances in Low Carbon, High Strength Ferrous Alloys |
APR 93 |
51 pages |
| Authors:
E. J. Czyryca; M. G. Vassilaros; NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD SHIP MATERIALS ENGINE ERING DEPT
|
| Carderock Division, Naval Surface Warfare Center participated in the Indo-US Pacific Rim Workshop on 'Advances in Low Carbon, High Strength Ferrous Alloys' held in New Delhi, India, 25 to 28 March 1992. E.J. Czyryca and M.G. Vassilaros gave invited presentations on the status of Navy program on steel plate and weld metal research and development, respectively. The workshop was jointly sponsored by Office of Naval Research, Naval Research laboratory, US ... |
|
| The Effect of Electric Discharge Machined Notches on the Fracture Toughness of Several Structural Alloys |
APR 93 |
84 pages |
| Authors:
J. A. Joyce; R. E. Link; NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD SURVIVABILITY STRUCTU RES AND MATERIALS DIRECTORATE
|
| Recent computational studies of the stress and strain fields at the tip of very sharp notches have shown that the stress and strain fields are very weakly dependent on the initial geometry of the notch once the notch has been blunted to a radius that is 6 to 10 times the initial root radius. It follows that if the fracture toughness of a material is sufficiently high so that fracture ... |
|
| Engineering and Design. Design of Hydraulic Steel Structures |
31 MAR 1993 |
51 pages |
| Authors:
CORPS OF ENGINEERS WASHINGTON DC
|
| This manual prescribes guidance for designing hydraulic steel structures (HSS) by load and resistance factor design (LRFD) and guidance for fracture control. Allowable stress design (ASD) guidance is provided as an alternative design procedure or for those structure types where LRFD criteria have yet to be developed. |
|
| Optimization of Steel Pile Foundations Using Optimality Criteria |
JUN 92 |
93 pages |
| Authors:
Alan S. Hoback; Kevin Z. Truman; WASHINGTON UNIV ST LOUIS MO DEPT OF CIVIL ENGINEERING
|
| The layout of steel piles is optimized to find the least weight structure. The pile cross-sections and the pile orientations (batters) are varied using optimality criteria. The handling of topological variables by the optimality criteria approach is thoroughly discussed. Several examples are given. One example is a retaining wall for which a two-dimensional pile layout can be used to represent a segment of the wall. Another example is a control ... |
|
| Three Case Histories of Cracking Problems Associated with Steel Bridge Floor Beams |
JUN 92 |
61 pages |
| Authors:
W. H. Walker; M. D. Holbrook; P. A. Cassity; ILLINOIS UNIV AT URBANA DEPT OF CIVIL ENGINEERING
|
| Floor system cracking problems, the focus of the present study, occur in both structures of recent construction and in older bridges which have been in service for many years. The present study has risen out of specific cases of floor system cracks which are not immediately detrimental to the structural integrity of the floor system and which do not at the outset seem related to a usual design basis load ... |
|
| Marine Structural Steel Toughness Data Bank. Volume 2 |
31 AUG 90 |
543 pages |
| Authors:
J. G. Kaufman; Martin Prager; NATIONAL MATERIALS PROPERTY DATA NETWORK COLUMBUS OH
|
| The Ship Structures Committee has sponsored the development of a data bank covering the toughness of steels for marine applications. Effort focused on the identification and procurement of sources of data containing quantitative toughness data, and the development from those data of a well-documented computerized data bank available to a wide range of engineers and material scientists. Included were raw data from material suppliers and data from papers and technical ... |
|
| Materials Trends in Marine Construction |
01 JAN 90 |
33 pages |
| Authors:
C. R. Crowe; D. F. Hasson; NAVAL ACADEMY ANNAPOLIS MD DIV OF ENGINEERING AND WEAPONS
|
| The use of materials in high performance structural systems, such as, offshore platforms or habitats, surface ships and submersibles has emphasized the need for engineered materials. The use of metallic materials has the advantage of a large data base on the processing fabrication effects on structural integrity. There is still the need to approach the overall design problem using a synergistic method to account for the interaction of the environment ... |
|
| Design for Steelwork Production during the Concept Design Phase |
SEP 1989 |
23 pages |
| Authors:
William Hills; I.L. Buxton; Robert G. Maddison; NEWCASTLE-UPON-TYNE UNIV (UNITED KINGDOM)
|
| Methods of improving the level of pre-contract design definition and the quality of information relating to steelwork are described. This information is combined with a comprehensive database of manufacturing process information to provide a system for estimating the work content of the main structural steelwork of ships such as ro-ro vessels. Procedures are presented that facilitate consistent estimation while minimizing data handling requirements and increasing the flexibility of the method ... |
|
| Effects of High Rate Shear on the Microstructure and Deformation and Fracture Behavior of Two High Strength Steels |
APR 89 |
171 pages |
| Authors:
E. M. Hackett; DAVID TAYLOR RESEARCH CENTER BETHESDA MD SHIP MATERIALS ENGINEERING DEPT
|
| The shear localization behavior of two high strength stee ls was evaluated at loading rates ranging from quasi-static to impact. The steels evaluated were similar in yield strength, but had different levels of toughness. The steel with superior toughness was direct quenched (DQ). The second steel was quenched and tempered (Q&T). Fatigue precracked Dual Notched Shear (DNS) specimens, loaded in mode II (in-plane shear), were employed. The objectives were to ... |
|
| An Experimental Study of the Formation Process of Adiabatic Shear Bands in a Structural Steel |
88 |
|
| Authors:
A. Marchand; J. Duffy; BROWN UNIV PROVIDENCE RI DIV OF ENGINEERING
|
| A series of experiments is described in which the local temperature and local strain are measured during the formation of an adiabatic shear band in a low alloy structural steel (HY-100). The specimen employed consists of a short thin-walled tube and the required rapid deformation rates are imposed by loading the specimen in a torsional Kolsky bar (split-Hopkinson bar). The local temperature is determined by measuring the infrared radiation emanating ... |
|
| An Experimental Study of the Formation Process of Adiabatic Shear Bands in a Structural Steel |
APR 87 |
|
| Authors:
A. Marchand; J. Duffy; BROWN UNIV PROVIDENCE RI DIV OF ENGINEERING
|
|
| Dynamic Fracture Behavior of Structural Materials |
JUL 86 |
224 pages |
| Authors:
J. H. Giovanola; D. A. Shockey; SRI INTERNATIONAL MENLO PARK CA
|
| This report presents results of a program to improve understanding of dynamic fracture behavior by investigating both crack tip loading conditions and material properties for fracture at high loading rates. A new test procedure, the one-point-bend test was analyzed and further developed th test a wide range of materials at impact loading rates. The test uses inertial loading to load the crack tip and affords an unambiguous measurement of the ... |
|
| Dynamic Test of a Corrugated Steel Keyworker Blast Shelter |
MAY 86 |
|
| Authors:
Stanley C. Woodson; Thomas R. Slawson; Randy L. Holmes; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS STRUCTURES LAB
|
| At the time this study was initiated, civil defense planning in the United States called for the evacuation of nonessential personnel to safe host areas when a nuclear attack is probable, requiring the construction of blast shelters to protect the key workers remaining in the risk areas. A full-scale corrugated steel Keyworker blast shelter was dynamically tested using the High Explosive Simulation Technique (HEST). The test primarily investigated the structural ... |
|
| The National Shipbuilding Research Program 1985 Ship Production Symposium Volume 2 Paper No. 19: Evaluation of Wet Blasting for Ship Application |
SEP 1985 |
11 pages |
| Authors:
Bernard R. Appleman; NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
|
| This paper presents the results of a field investigation of equipment and technology for wet abrasive blasting as a technique for preparation of structural steel for painting. Ten different commercially available wet blasting units were selected for field evaluation. The units selected included the following generic types: air abrasive wet blasting (addition of water at the nozzle to conventional dry blasting equipment); air/water/abrasive slurry blasting (mixing of water with the ... |
|
| Investigation of Steels for Improved Weldability in Ship Construction |
MAY 84 |
|
| Authors:
L. J. Cuddy; J. S. Lally; L. F. Porter; UNITED STATES STEEL CORP MONROEVILLE PA
|
| The purpose of Phase III of this contract is to further develop ship plate steels following on the work done in Phase II. As the initial task of Phase III, the microstructures and properties produced in the heat affected zone (HAZ) of Phase II steels were re-evaluated. Addition of titanium to the base steel improved toughness of the HAZ by refining the austenite grain size and by changing transformation products ... |
|
| Load Ratio and Environmental Effects on Fatigue Crack Growth Rates for Several Ship Steels |
05 APR 1983 |
41 pages |
| Authors:
S. J. Gill; T. W. Crooker; NAVAL RESEARCH LAB WASHINGTON DC
|
| Fatigue crack growth rate tests were conducted on HY-100, high tensile steel (HS) and medium carbon ship steels. Tests were conducted in air at 5 Hz and in 3.5 percent NaCl salt water under freely corroding conditions at 0.5 Hz. Load ratios of 0.10, 0.67 and 0.80 were investigated in both environments. For data gathered in air, crack growth rates (da/dN) were insensitive to stress ratio and the data conformed ... |
|
| Effects of High Heat Input Welding of Construction Steels A36, A514, and A516 |
JAN 1983 |
|
| Authors:
R. Weber; CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL
|
| This report documents the results of a study of shielded metal-arc (SMAW) and gas metal-arc welding (GMAW) butt weld tests using high heat inputs of 60 to 90 kJ/in. (2362 to 3543 J/mm). The steels used in this study were American Society for Testing and Materials (ASTM) Specifications A36, A514, and A516. Plate thicknesses were 3/4 to 1 in. (19 to 25mm). It was concluded that strength levels were generally ... |
|
| Crack Initiation and Propagation Properties of HY 130 Steel Weldments Following Temper Embrittlement |
SEP 1982 |
|
| Authors:
K. I. McRae; DEFENCE RESEARCH ESTABLISHMENT PACIFIC VICTORIA (BRITISH COLUMBIA)
|
| Elastic-plastic fracture mechanics (EPFM) may be applied to engineering problems to determine material properties related to crack initiation and propagation. Specifically, these concepts have been applied to a study of the as welded and temper embrittled weldments of HY 130 steel. The property relating the energy requirement for ductile crack initiation, JIc or KIc, is seen to be similar in both instances, although previous Charpy V-notch testing results have indicated ... |
|
| Roll-Bonded 300M/1010 Steel Metal-Metal Laminates: Forgeability, Toughness, Fatigue, and Stress Corrosion |
JUN 1982 |
|
| Authors:
L. E. Sloter; VOUGHT CORP ADVANCED TECHNOLOGY CENTER DALLAS TX
|
| The fabrication of Alloy 300M/1010 steel metal-metal laminates in thick section by hot bonding is described and discussed. The results of the forgeability testing of the roll-bonded laminate plate and the tensile, fracture toughness, fatigue, and stress-corrosion cracking properties of the roll-bonded and roll-bonded and forged laminate material and 300M monolithic control material are reported, evaluated, and discussed. Two thick laminate billets in which eighteen layers of 300M low alloy ... |
|
| Blast Capacity Evaluation of a Strengthened Steel Building |
JAN 1982 |
|
| Authors:
Frederick E. Sock; Norval Dobbs; W. Stea; Kirit Shah; AMMANN AND WHITNEY NEW YORK
|
| A series of dynamic tests were performed on a specially designed strengthened-steel building for use in Army Ammunition Plants. Test results indicated that the building can resist approximately 48.3 kPA (7.0 psi) of blast overpressures. |
|
| Determination of Strain Rates in Ship Hull Structures: A Feasibility Study |
82 |
|
| Authors:
Julio G. Giannotti; Karl A. Stambaugh; PITTSBURGH UNIV PA INST FOR COMPUTATIONAL MATHEMATICS AND APPLICATIONS
|
| The material testing techniques that are currently used to determine the toughness of the ship structural steels load material specimens at various loading and strain rates. Since the toughness, nilductility and the yield strength characteristics of ship structural steels varies with strain rate, it has become necessary to determine the extent to which the strain rates produced by materials testing techniques are representative of ship service experience. A survey of ... |
|
| Weldability Characteristics of Construction Steels A36, A514, and A516 |
DEC 1981 |
|
| Authors:
R. A. Weber; CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL
|
| This study determined the voltage, current, and travel speed limits necessary to ensure proper weld strength levels for three construction steels: American Society for Testing and Materials (ASTM) A36, A516, and A514. To achieve the objective of this study, voltage, current, and travel speed limits are defined through bead-on-plate tests and tests to determine the tensile and impact properties of butt joint welds produced with fully automatic gas metal- arc ... |
|
| Fatigue Crack Growth in A36/A283 Plate in Air and Sea Water Environments. |
26 MAR 1981 |
|
| Authors:
F. R. Stonesifer; J. M. Krafft; NAVAL RESEARCH LAB WASHINGTON DC
|
| Extensive use of A36 type steels in wave-excited marine structures raises the question of its resistance to fatigue crack propagation in the sea water environment. Above its ductile-brittle transition temperature, static fracture of such a low strength steel usually entails extensive plastic deformation. However with cyclic loading, fatigue cracks can grow with little plastic flow, at crack loading levels well below that required for fracture instability. The hazard entailed has ... |
|
| Light Gage Steel Design via the Method of Multipliers, |
1981 |
|
| Authors:
Nesrin Sarigul; Richard Gallagher; ARIZONA UNIV TUCSON COLL OF ENGINEERING
|
| Cold formed light gage steel shapes would appear to be an attractive target for structural optimization procedures. In contrast with rolled sections, where shapes and dimensions are fixed by the economics of production, there is scope for choice of dimensions in cold formed steel in order to achieve the objective of minimum weight or minimum cost. At the same time, light gage steel shapes are manufactured in relatively large quantities ... |
|
| Fractographic and Microstructural Analysis of Stress Corrosion Cracking of A533 Grade B Class 1 Plate and A508 Class 2 Forging in Pressurized Reactor-Grade Water at 93 C. |
25 JAN 1980 |
|
| Authors:
V. Provenzano; K. Torronen; D. Sturm; W. H. Cullen; NAVAL RESEARCH LAB WASHINGTON DC
|
| Stress corrosion cracking (SCC) studies were conducted in two commonly used pressure vessel steels: A533 Grade B Class 1 (A533-B-1) plate and an equivalent A508 Class 2 (A508-2) forging. The purpose of these studies was to determine the response of the materials in simulated pressurized water reactor environment. Round tensile specimens, 32 mm (1.25 in.) along the gage section and 9.5 mm (0.375 in.) in diameter, were bolt-loaded to 75 ... |
|
| The SCC Properties of Modified High-Strength Steel Plates and Weld Metals. |
17 JUL 1979 |
|
| Authors:
C. T. Fujii; NAVAL RESEARCH LAB WASHINGTON DC
|
| This report describes the results of baseline studies on the effects of chemical, metallurgical, and mechanical factors on the SCC properties of high-strength steels and weldments. The primary materials were quench-and-tempered steels or weld metals in the HY-100 and HY-130 systems with complex martensitic microstructures. The cantilever beam method was used to measure K sub Iscc of the materials in 3.5% sodium chloride (NaCl) solution under zinc-coupled conditions. This parameter ... |
|
| Special Structural Shapes: Factors Affecting Usage in U.S. Shipbuilding |
JUL 1979 |
53 pages |
| Authors:
Charles D. Turk; Deborah L. Godat; Barry H. Minkin; L. D. Chirillo; J. F. Curtis; TODD PACIFIC SHIPYARDS CORP SEATTLE WA
|
| Shipbuilders consider that the substitution of special structural steel shapes for standard shapes has potential for increasing productivity. The use of special shapes, e.g. long-leg angles and bulb flats, in ships is common throughout the rest of the world. In the United States, except where shipbuilders have resorted to fabricating shapes, standard angles, tees and channels that frequently need further processing are the norm. In response to shipbuilders' interest in ... |
|
| Fracture Characteristics of Structural Steels: Reference Manual |
APR 1979 |
325 pages |
| Authors:
J. Aleszka; Y. Kim; J. Scott; A. Kumar; CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL
|
| This report presents the findings of a scanning electron microscope (SEM) study of tensile, fatigue, and impact fracture characteristics of structural steels used in Army Corps of Engineers facilities and components. Steels investigated were ASTM A-36, ASTM A-514 AX-110 weld, HY-130, ASTM A-588, ASTM A-242, AISI 416, 17-4 PH, ASTM A-516, and ASTM A-607. Specimens were tested in as-received, hydrogen-embrittled, and temper-embrittled conditions. The failure mode of embrittled and unembrittled ... |
|
| Structural Integrity of Water Reactor Pressure Boundary Components. |
MAY 1978 |
|
| Authors:
F. J. Loss; NAVAL RESEARCH LAB WASHINGTON D C
|
| This report describes research progress in a continuing program to characterize materials properties performance with respect to structural integrity of light water reactor pressure boundary components. Progress for this reporting period is summarized in the following areas: (a) evaluation of critical factors in crack growth rate studies in a pressurized water reactor environment, (b) irradiation and postirradiation (annealing) heat treatment study of the toughness of pressure vessel steels having a ... |
|
| The Effect of Strain Rate on the Toughness of Ship Steels. |
APR 1978 |
|
| Authors:
P. H. Francis; T. S. Cook; A. Nagy; SOUTHWEST RESEARCH INST SAN ANTONIO TEX
|
| Yield strength and fracture toughness, as measured by the dynamic tear test, were determined as a function of load rate and temperature for several ship primary structure steels in strength ranges up to 100 ksi. The materials used were ABS-B, DS, AH-32, EH-32, CS, A517-D, A678-C, and A537-B, in one or two heats each. The effect of notch geometry, i.e., fatigue precracked vis-a-vis pressed notch, was investigated in some of ... |
|
| Conditions Affecting Crack-Growth Rate: Relevance to Test Method Selection and Data Interpretation. |
07 JUN 1977 |
|
| Authors:
A. M. Sullivan; NAVAL RESEARCH LAB WASHINGTON D C
|
| The literature of fatigue and corrosion fatigue crack-growth rate contains many discrepancies. The many variables associated with fatigue crack-growth rate are classified, and their relative significance is discussed. (Author) |
|
| A Unified Approach for Modeling Inelastic Behavior of Structural Metals under Complex Cyclic Loadings. |
MAY 1977 |
|
| Authors:
H. R. Jhansale; CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN ILL
|
| This report develops a general procedure for modeling the inelastic stress-strain response of structural metals subjected to complex irregular cyclic loadings. The model is ideally suited for programming on a digital computer and uses 'cyclic' material parameters (or properties) determined from simple constant strain amplitude cyclic tests. Four model formulations which include three degrees of simplification in the model are proposed and their appropriate applications are indicated. In its most ... |
|
| Effect of Percentage Bainite Formed at 400 C on the Fracture Toughness Properties of as-Quenched HY130, |
DEC 1976 |
|
| Authors:
A. J. Caudrey; NAVAL CONSTRUCTION RESEARCH ESTABLISHMENT DUNFERMLINE (SCOTLAND)
|
| The comparative fracture toughness properties of bainite and martensite in a low alloy high yield strength structural steel have been investigated using the crack opening displacement (COD) technique of general yielding fracture mechanics. (Author) |
|
| Fendering for Structural Steel Dolphins. |
30 NOV 1976 |
|
| Authors:
Myle J. Holley Jr; HANSEN HOLLEY AND BIGGS CAMBRIDGE MASS
|
| Fendering for Structural Steel Dolphins with various contact areas, horizontal and vertical rotations, fender shields. New concepts of tire casings for surface ships and for submarines. This fendering concepts can also be used outside the Structural Steel Dolphins. (Author) |
|
| Acoustic Emission during Fracture-Toughness Tests of a Nuclear Pressure Vessel Steel and Its Weldment. |
AUG 1976 |
|
| Authors:
hajime hatano; Kanji Ono; CALIFORNIA UNIV LOS ANGELES DEPT OF MATERIALS
|
| This paper describes acoustic emission behavior of SA533B steels during fracture toughness tests at 23, -15 and -35 C. Results on AE measurements are summarized and discussed in reference to fractographic observations. Two distinct types of AE signals were recognized by means of waveform, rms voltage changes and amplitude distribution analysis. One type of burst emissions was associated with the formation of equiaxed dimples, while the other type appears to ... |
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*STRUCTURAL STEEL
