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Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005400
EISBN: 978-1-62708-196-2
... the stress-based approach of the Bishop and Hill procedure to directly find stress states that could simultaneously operate at least five independent slip systems. It presents ways to find isostress or lower-bound yield loci for sheets having single-crystal orientation. plasticity Schmid's law...
Abstract
This article presents the Schmid's law that describes the response of crystal structures to loading. It describes the Taylor model to calculate the uniaxial yield stress of an isotropic face-centered cubic aggregate in terms of critical resolved shear stress. The article discusses the stress-based approach of the Bishop and Hill procedure to directly find stress states that could simultaneously operate at least five independent slip systems. It presents ways to find isostress or lower-bound yield loci for sheets having single-crystal orientation.
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Stress distribution ahead of crack in which small-scale plasticity is inclu...
Available to PurchasePublished: 01 January 2002
Fig. 20 Stress distribution ahead of crack in which small-scale plasticity is included
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Stress distribution ahead of crack in which small-scale plasticity is inclu...
Available to PurchasePublished: 01 January 1996
Fig. 6 Stress distribution ahead of crack in which small-scale plasticity is included
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Contraction and constraint from crack-tip plasticity. High stress and strai...
Available to PurchasePublished: 01 January 1996
Fig. 17 Contraction and constraint from crack-tip plasticity. High stress and strain at the crack tip in the x - and y -directions cause a contraction in the z -direction. However, because the crack itself is stress free, no contraction occurs behind the crack front. Further away from
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Simulated role of plasticity in springback for a draw-bend test. (a) Differ...
Available to PurchasePublished: 01 January 2006
Fig. 24 Simulated role of plasticity in springback for a draw-bend test. (a) Difference of springback angle (Δθ) for pure-elastic and elastoplastic springback simulations. (b) Differences in through-thickness stress distribution following pure-elastic and elastoplastic springback. R / t
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Comparison of plasticity predictions for various in-plane sheet directions ...
Available to PurchasePublished: 01 January 2006
Fig. 25 Comparison of plasticity predictions for various in-plane sheet directions for several yield functions fit to a 6022-T4 aluminum alloy sheet. (a) Plastic anisotropy parameter ( r -value). (b) Yield stresses normalized to yield stress in the rolling direction (0°)
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Results from distortion modeling based on plasticity strain (Q-Weld) compar...
Available to PurchasePublished: 31 October 2011
Fig. 16 Results from distortion modeling based on plasticity strain (Q-Weld) compared with fully three-dimensional coupled thermal elastic-plastic analysis (3D-EPA) model. The overall shape distortion (exaggerated) is comparable. In addition, the predicted displacement of the edges from
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in Residual Stresses and Distortion in Quenched and Tempered Steels
> Steel Heat Treating Technologies
Published: 30 September 2014
Fig. 5 Schematic representation of transformation-induced plasticity
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Dependency of transformation plasticity constant ( K ) on carbon content fo...
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in Residual Stresses and Distortion in Quenched and Tempered Steels
> Steel Heat Treating Technologies
Published: 30 September 2014
Fig. 7 Dependency of transformation plasticity constant ( K ) on carbon content for 20NiCrMo4-3-5, 50NiCrMo4-3-5, and 80NiCrMo4-3-5. Source: Ref 54
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Predictions of interface-constrained plasticity growth of cavities. (a) Eff...
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in Modeling of Cavity Initiation and Early Growth during Superplastic and Hot Deformation
> Fundamentals of Modeling for Metals Processing
Published: 01 December 2009
Fig. 8 Predictions of interface-constrained plasticity growth of cavities. (a) Effect of particle size ( R ) on growth and debonding for m = 0.3. (b) Effect of particle size, initial defect size (1 or 100 nm), and m -value on constrained growth, debonding, and subsequent unconstrained
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Material elements used as models for plasticity analysis of localized thinn...
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in Models for Fracture during Deformation Processing
> Fundamentals of Modeling for Metals Processing
Published: 01 December 2009
Fig. 23 Material elements used as models for plasticity analysis of localized thinning and fracture of materials. (a) R -model (b) Z -model
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Stress distribution ahead of crack in which small-scale plasticity is inclu...
Available to PurchasePublished: 01 December 1998
Fig. 5 Stress distribution ahead of crack in which small-scale plasticity is included
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Published: 01 January 1993
Fig. 6 The effect of adhesive plasticity on joint load-carrying capability. See Fig. 4 for explanation of symbols. Original specimen dimensions given in inches
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Results from distortion modeling based on plasticity strain (Q-Weld) compar...
Available to PurchasePublished: 01 November 2010
Fig. 16 Results from distortion modeling based on plasticity strain (Q-Weld) compared with fully three-dimensional coupled thermal elastic-plastic analysis (3D-EPA) model. The overall shape distortion (exaggerated) is comparable. In addition, the predicted displacement of the edges from
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Effect of intensity of transformation plasticity on simulated distortion pa...
Available to Purchase
in Modeling of Quenching, Residual-Stress Formation, and Quench Cracking
> Metals Process Simulation
Published: 01 November 2010
Fig. 68 Effect of intensity of transformation plasticity on simulated distortion pattern. Enlarged 100 times and central axis on the left. Source: Ref 164
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Influence of the transformation plasticity constant, K, on the axial residu...
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in Modeling of Quenching, Residual-Stress Formation, and Quench Cracking
> Metals Process Simulation
Published: 01 November 2010
Fig. 69 Influence of the transformation plasticity constant, K, on the axial residual-stress distribution along the surface of the cylinders. Source: Ref 166
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Stress distribution ahead of crack in which small-scale plasticity is inclu...
Available to PurchasePublished: 15 January 2021
Fig. 20 Stress distribution ahead of crack in which small-scale plasticity is included
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Intercritical annealing cycles. TRIP, transformation-induced plasticity. Ad...
Available to PurchasePublished: 01 February 2024
Fig. 35 Intercritical annealing cycles. TRIP, transformation-induced plasticity. Adapted from Ref 10
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Book Chapter
Fracture of Plastics
Available to PurchaseSeries: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003541
EISBN: 978-1-62708-180-1
... the applicability of available analytical tools in conjunction with an understanding of failure mechanisms. brittle fractures crack propagation deformation ductile fractures fractography fracture characteristics fracture modes fracture surfaces mechanical behavior plastics structural polymers...
Abstract
This article reviews the mechanical behavior and fracture characteristics that discriminate structural polymers from metals. It provides information on deformation, fracture, and crack propagation as well as the fractography involving the examination and interpretation of fracture surfaces, to determine the cause of failure. The fracture modes such as ductile fractures and brittle fractures are reviewed. The article also presents a detailed account of various fracture surface features. It concludes with several cases of field failure in various polymers that illustrate the applicability of available analytical tools in conjunction with an understanding of failure mechanisms.
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