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finite-life criterion

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Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006779
EISBN: 978-1-62708-295-2
... fluctuations. This article begins with an overview of fatigue properties and design life. This is followed by a description of the two approaches to fatigue, namely infinite-life criterion and finite-life criterion, along with information on damage tolerance criterion. The article then discusses...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002350
EISBN: 978-1-62708-193-1
.... This article presents three general approaches to fatigue design, with a discussion on their respective attributes. These include infinite-life criterion, finite-life criterion, and damage tolerant criterion. The article describes the individual property requirements of these approaches. It also presents...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003544
EISBN: 978-1-62708-180-1
... Abstract This article describes three design-life methods or philosophies of fatigue, namely, infinite-life, finite-life, and damage tolerant. It outlines the three stages in the process of fatigue fracture: the initial fatigue damage leading to crack initiation, progressive cyclic growth...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003291
EISBN: 978-1-62708-176-4
... basis for damage and life predictions than von Mises, at least if only stress is considered in life prediction and not ductility. (See Fig. 1 in the section “Steady-State Creep Stress Distribution in a Tube” in this article.) This criterion was originally developed for stainless steels but has...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002364
EISBN: 978-1-62708-193-1
... stresses resulting in the same finite life to failure. These are illustrated in Fig. 27 . Fig. 27 Various forms of presenting mean-stress data The equations for the lines shown in Fig. 27 are the following: Line a (Soderberg): (Eq 53) S a S cr + S o S y...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003313
EISBN: 978-1-62708-176-4
... of fatigue properties each play a role in engineering, and each property is used in the context of an underlying fatigue design philosophy as follows: Design philosophy Design methodology Principal testing data description Safe-life, infinite-life Stress-life S - N Safe-life, finite-life...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005519
EISBN: 978-1-62708-197-9
... University, working with a major automotive original equipment manufacturer, used finite-element analysis to study the effect of tool wear on burr formation in face milling high-silicon aluminums with polycrystalline diamond (PCD) tooling ( Ref 34 ). Because of the extremely long life of PCD...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003380
EISBN: 978-1-62708-195-5
... characterization Fig. 10 Finite element analysis using VCCT to determine strain energy release. Delamination growth, a , a ′, and b ; directions are shown in detail of Fig. 8 . Fig. 11 Flexbeam life prediction Figure 12 shows the prediction of pull-off loads that cause separation...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002476
EISBN: 978-1-62708-194-8
... strength. It discusses life prediction reliability models used for predicting the life of a component with complex geometry and loading. The article outlines reliability algorithms and presents several applications to illustrate the utilization of these reliability algorithms in structural applications...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005531
EISBN: 978-1-62708-197-9
..., stress analysis from FEA can be used in conjunction with crack propagation data for the material to estimate fatigue life of a part or tooling component. Examples of the use of modeling to solve specific problems in PM processing are given in the following sections. Extrapolating this success...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003257
EISBN: 978-1-62708-176-4
... may also include additional criteria such as minimum weight, minimum life cycle cost, environmental responsibility, human factors, and product safety and reliability. This article introduces the basic concepts of mechanical design and its general relation with the properties derived from mechanical...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005431
EISBN: 978-1-62708-196-2
... of nonlinearity manifests itself in several real-life situations, for instance, in metal forming, gears, interfaces of mechanical components, pneumatic tire, and crash. A load on a structure causes nonlinearity if it changes with the displacement and deformation of the structure (such as pressure loading...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002469
EISBN: 978-1-62708-194-8
... acceptance in the prediction of fatigue life. In this approach, crack initiation is neglected and crack propagation to final failure is considered. This method can give a conservative estimate of fatigue life. There has been considerable success with this method. However, the treatment of short cracks...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005528
EISBN: 978-1-62708-197-9
... generation, and tool life. An optical micrograph of the cut surface from these processes is shown in Fig. 1(b) , while the sheet cut-edge profile is schematically shown in Fig. 1(c) . In general, a few characteristic zones can be distinctly identified in these surfaces. They are: Rollover zone...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004021
EISBN: 978-1-62708-185-6
... be characterized by stress-number of cycles curves that relate the fatigue life to cycles to failure. Typically, these data are very expensive to obtain. Thus, it is extremely rare to find fatigue data for forging or cold heading dies in the literature. Die stress analysis is used to determine the stress level...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005539
EISBN: 978-1-62708-197-9
... be taken into account throughout the various stages of thermal-mechanical processes. The framework established for CPFEM and the predicted crystallographic texture will also facilitate further investigations of mechanical properties, fracture, and life prediction. With the continuously improving...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002366
EISBN: 978-1-62708-193-1
... for Predicting Material Life in Fatigue , Ostergren W.J. and Whitehead J.R. , Ed., ASME , 1979 , p 247 – 264 22. Ellyin F. , A Criterion for Fatigue under Multiaxial States of Stress , Mechanics Research Communications , Vol 1 , 1974 , p 219 – 224 10.1016/0093-6413(74)90068-8...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0009154
EISBN: 978-1-62708-186-3
... m up to 1000 MPa (145 ksi), can be joined Process can be monitored in real-time for quality control Can also join unweldable and dissimilar material combinations Increased fatigue life compared to spot-welded joints Automated process with low cycle time The disadvantages...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003528
EISBN: 978-1-62708-180-1
... in determining the effective service life of a component. When the failure analyst suspects residual stress as a contributing factor to a premature failure, such suspicions may be validated by experiment and by measurement. X-ray diffraction residual stress measurement analysis should be specified when damaged...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003546
EISBN: 978-1-62708-180-1
... Abstract Thermomechanical fatigue (TMF) refers to the process of fatigue damage under simultaneous changes in temperature and mechanical strain. This article reviews the process of TMF with a practical example of life assessment. It describes TMF damages caused due to two possible types...