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elastic-plastic fracture mechanics

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Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006767
EISBN: 978-1-62708-295-2
... elastic fracture mechanics analysis, with some mention of elastic-plastic fracture mechanics analysis. The article describes the probabilistic aspects of fatigue and fracture. Information on crack-growth simulation of the material is also provided. crack-growth simulation elastic-plastic fracture...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006774
EISBN: 978-1-62708-295-2
... loading in a corrosive environment (stress-corrosion fatigue), and elastic buckling. Elastic buckling may cause parts to contact, causing seizure of a rotating system, but it may also lead to plastic buckling and ultimately to fracture. The purpose of this article is to introduce the subject of...
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
... “elastic” stress fields in nondeformed material (pure cleavage) versus cleavage fracture in material plastically deformed in the yield zone in front of a macroscale crack. Important work from the period of the 1950s and 1960s can be found in the literature ( Ref 10 – 13 ). A discussion of identifying...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006776
EISBN: 978-1-62708-295-2
... notches or other geometric variations. These sites can act as stress concentrators or can rapidly produce microcracks by mechanisms such as inclusion debonding and particle fracture. The stress-concentration effect permits local permanent plastic deformation at nominal stresses below yield. Initiation...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001831
EISBN: 978-1-62708-181-8
... or plastic-flow directions in the immediate vicinity where the voids form, such as at the crack tip. In reality, matching dimples on mating fracture faces are seldom of the same size or seldom show equivalent angular correspondence. Because actual fractures rarely occur by pure tension or shear, the...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006777
EISBN: 978-1-62708-295-2
... description of all of the proposed mechanisms is beyond the scope of this article; however, the film-rupture model, discussed subsequently, has received significant attention for IGSCC of brasses. Generally, the mechanism proposed involves initiation by the rupture of a passive film as a result of plastic...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005461
EISBN: 978-1-62708-196-2
... ( Z -model) and the other having a groove in the radial direction ( R -model), as shown in Fig. 23 . Applying plasticity mechanics to each model, fracture is considered to have occurred when the thin region B, t B , reduces to zero thickness. When the fracture strains are plotted for different...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003225
EISBN: 978-1-62708-199-3
... Abstract Analysis of the failure of a metal structure or part usually requires identification of the type of failure. Failure can occur by one or more of several mechanisms, including surface damage (such as corrosion or wear), elastic or plastic distortion, and fracture. This leads to a wide...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003241
EISBN: 978-1-62708-199-3
... design engineer, resistance to scratching to a mineralogist, and resistance to cutting to a machinist. Although these various definitions of hardness appear to differ significantly in character, they are all related to the plastic flow stress of the material. Table 1 lists the major types of...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005435
EISBN: 978-1-62708-196-2
... shuffle transitions. The article reviews the application of the Ginzburg-Landau approach to rigorous solutions for issues in the structure of a martensitic nucleus based on the martensitic nucleation theory. The three basic behavior modes of martensitic growth, such as elastic, elastic/plastic, and fully...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004017
EISBN: 978-1-62708-185-6
... determination of the extent of possible plastic deformation before fracture (ductility). Therefore, a complete description of the workability of a material is specified by its flow stress dependence on processing variables (for example, strain, strain rate, preheat temperature, and die temperature), its failure...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006753
EISBN: 978-1-62708-295-2
... phenomenon of fracture, culminating in part with the development of the engineering discipline of fracture mechanics ( Ref 4 ). Through these and other efforts, insights into the cause and prevention of failures continue to evolve. Further discussion can be found in the article “ Failures Related to Welding...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000610
EISBN: 978-1-62708-181-8
... are believed to be tenacious artifacts created by cracking of thin surface deposits of either corrosion products or dried body fluids. SEM, 450×. Fig. 673 : Slip bands and crack on electropolished outside surface of plate near the fracture. Plastic deformation due to bending of the plate by the...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001834
EISBN: 978-1-62708-181-8
... relatively large amount of plastic deformation precedes the fracture Shear lips are usually observed at the fracture termination areas The fracture surface may appear to be fibrous or may have a matte or silky texture, depending on the material The cross section at the fracture is usually reduced by...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.9781627081764
EISBN: 978-1-62708-176-4
Book Chapter

Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006790
EISBN: 978-1-62708-295-2
... of the wear surface. For brittle materials (e.g., ceramics), a transition from a purely cutting mechanism to one that also involves fragmentation occurs when the nature of contact changes from elastic-plastic indentation to Hertzian fracture ( Ref 11 ). The conditions under which this transition...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003025
EISBN: 978-1-62708-200-6
... Abstract Mechanical properties are often the most important properties in the design and selection of engineering plastics. Temperature, molecular structure, crystallinity, viscoelasticity, and effects of environment, fillers and reinforcements are considered as the basic factors affecting the...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006676
EISBN: 978-1-62708-213-6
... state, the HDPE resin lost over 60% of its elastic modulus at room temperature, because of the plasticizing effects of the solvent. A comparison of the DMA results, indicating the reduction in mechanical properties, is shown in Fig. 6 . Fig. 6 Comparison of dynamic mechanical analysis results...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003044
EISBN: 978-1-62708-200-6
... discussion is limited to planar and molded composites, including chopped fiber and reinforced plastics. Braided or three-dimensional woven composites are not discussed, as their isotropic nature allows the use of more common test methods. The information in this article is largely...
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
... of plastic strain the material can undergo prior to fracture. Microscale fractographic features consist of ruptured dimples, and both diffuse and local necking may be macroscopically visible depending on the component geometry. Mechanical conditions and metallurgical features can influence the...