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ideal critical diameter

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001642
EISBN: 978-1-62708-235-8
... were made, because calculations of ideal critical diameter and analysis of available hardenability data indicated that the original hardness specification could be met. There was, however, less room for process variation. The parts ended up containing temper carbides, developed heavy decarburization...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001807
EISBN: 978-1-62708-241-9
... shear stress. Although friction influences other stress components, the effect is relatively insignificant by comparison. It is thus more appropriate to select orthogonal shear stress as the critical stress when assessing subsurface rolling contact fatigue in rolling-sliding systems. bearings cam...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006797
EISBN: 978-1-62708-295-2
... Comparison of the conventional stress-strain behavior of a low-carbon steel, a strain-hardening material, and the idealized material assumed in limit analysis. All have the same yield strength. Fig. 2 (a) Buckled flange (lower arrow) of an extruded aluminum section deliberately loaded...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003573
EISBN: 978-1-62708-180-1
... in the most highly stressed regions of the structure and therefore cannot be used in designing for resistance to fatigue or elastic buckling or in designing flaw-tolerant structures. Limit analysis assumes an idealized material—one that behaves elastically up to a certain yield strength, then does...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001715
EISBN: 978-1-62708-219-8
..., for a circular, embedded flaw, the flaw can grow to an area less than 0.2 % of the wire cross section (flaw diameter about 2% the wire diameter) before failure would be predicted. For a fracture toughness of 60 MPa·m 1/2 , the critical flaw size is 0.5 mm (0.02 inch). The predictions are conservative...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001722
EISBN: 978-1-62708-236-5
.... The presence of the grooves alone would result in considerable intensification of stress in zones which are normally highly stressed, while the crazy cracking introduced a multiplicity of stress-raisers of a type almost ideal from the point of view of initiating fatigue cracks. Chromium plating...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006801
EISBN: 978-1-62708-329-4
... significant bottom-line impact. Rapid resolution requires choosing a corrective action based on understanding both the problem and its initiation. Accurately defining the problem is a critical first step in determining effective corrective actions in any failure analysis. Sheet forming failures typically fall...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001649
EISBN: 978-1-62708-234-1
... critical factors in the assembly of the bolted joint such as frictional characteristics were addressed by analytical procedures. Much of the valuable information regarding the frictional characteristics of the nut and bolt were lost subsequent to failure; however, it is useful to qualitatively evaluate...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001812
EISBN: 978-1-62708-180-1
... be dictated by a complex system of specification and qualification controls. The extent and complexity of the system needed is usually dictated by the probable cost of a fastener failure. Adequate testing is the most practical method of guarding against failure of a new fastener system for a critical...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006805
EISBN: 978-1-62708-329-4
... and a rigid structure. (b) Ideal relationship of bolt load to working load with an elastic fastener and a rigid structure. (c) Actual relationship (both fastener and structure elastic) of bolt load to working load Fig. 4 The 4520 steel semitrailer wheel studs that failed by fatigue. The wheel nuts...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003526
EISBN: 978-1-62708-180-1
... and idealized structures can be analyzed using simplified loading and materials property assumptions. When complex designs, transient loadings, and nonlinear material behavior need to be evaluated, computer-based techniques are used. This is where finite element analysis (FEA) is most applicable and provides...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001030
EISBN: 978-1-62708-214-3
... acidic electrolyte in the form of dissociated molybdenum disulfide. Therefore, improper preparation of fastener holes and poor selection of materials enhanced the potential for early failure rather than prolonged life. Remedial Action Ideally, stress-corrosion critical components should...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003549
EISBN: 978-1-62708-180-1
... require a more aggressive approach. Inhibited dilute acid solutions and citric acid cleaners can be used to clean adherent corrosion deposits. In cases where the protection of the fracture features is critical, softened acetate tape can be used to remove adherent deposits. This method also retains...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006773
EISBN: 978-1-62708-295-2
... and deformations in structures and components. It is usually the first technique in both the design of a component and in the analysis of a failed component. However, it has its limitations in that only relatively simple and idealized structures can be analyzed using simplified loading and materials property...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003543
EISBN: 978-1-62708-180-1
... factor, D is the fastener diameter, and P is the tensile load. Assuming a predetermined torque for bare steel screws, the tension preload can be more than twice as high on lubricated fasteners. In this case, the reduced friction level resulted in a tension preload sufficient to fracture the screws...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003520
EISBN: 978-1-62708-180-1
... the attention of the investigator, because they reduce production efficiency, waste critical materials, and increase costs. In some instances, they cause considerable damage or personal injury. Finally, failures can result in costly litigations. The need to develop and encourage the science (and art...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003538
EISBN: 978-1-62708-180-1
...), and the activation of a given mechanism depends on the temperature, loading rate, and degree of constraint. In an ideal material containing neither inclusions nor second phases, ductile fracture would be expected to occur by slip and possibly twinning and result in complete reduction in area ( Fig. 1 ). Ref 1...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006775
EISBN: 978-1-62708-295-2
... depends on the temperature, loading rate, state of stress, and degree of constraint. In an ideal material containing neither inclusions nor second phases, ductile fracture would be expected to occur by slip and possibly twinning and result in complete reduction in area ( Fig. 1 ). Alternately...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006778
EISBN: 978-1-62708-295-2
... coefficient including a friction factor, D is the fastener diameter, and P is the tensile load. Assuming a predetermined torque for bare steel screws, the tension preload can be more than twice as high on lubricated fasteners. In this case, the reduced friction level resulted in a tension preload...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006819
EISBN: 978-1-62708-329-4
... that will be placed in cyclic service to mitigate fatigue damage and to optimize damage tolerance and useful operating life. Modern computing capabilities also make detailed analytical and design by analysis (DBA) techniques feasible for critical fatigue problems. For in-service equipment that originally may not have...