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Mode III crack in a linear hardening solid in general yielding
A dislocation based solution is found for the stationary mode III crack (in antiplane strain) in a solid whose elastic-plastic stress-strain curve is linear. The yield ...
[ 1-s2.0-0167663693900797-main.pdf?_tid=02aa8d3e-fae3-11e3-b297-00000aab0f02&acdnat=1403534046_94a744ad7d240e75b427ef1a6bf8d8c0 - Read/Download File

elastic-plastic analysis of combined mode i and iii crack-tip fields
crack in an elastic-plastic solid are obtained by finite element analysis under ... to the tip and n is the strain hardening exponent of the material. lmpli~tions of ... engineering structures are generally subjected to combined mode I, II and III .... mode I and mode III asymptotic crack-tip solutions for linear elastic materials are.
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crack-tip fields in steady crack~growth with linear strain-hardening]l
Solids, 1977, Vol. 25, pp ... crack growth in strain-hardening, elastic-plastic materials characterized by J1 flow ... (Mode III), plane stress and plane strain ( Mode I) are each treated. ..... Flow theory with a smooth yield surface, such as that used .... The governing equation forfis of the same general form (4.15) as in plane stress,.
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fully plastic crack problems - Harvard University
Abstract—Crack problems are formulated for solids characterized by a pure ... The near-tip field at a stationary crack in an elastic-plastic strain hardening ... scale yielding, I cannot be calculated simply, in general, since it depends in ..... Some closely related results for the fully plastic problem in anti-plane shear ( Mode III) are.
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Mode III crack growth in linear hardening materials with strain
Mode III crack growth in linear hardening materials with strain gradient .... the range where strain gradients are dominant and is generally of the order of few .... utive equations (2.14) and (2.15) hold when the yield condition (2.7) is satisfied. If ..... antiplane crack propagation problem in couple stress strain gradient solids.
[ ijf2004-765.pdf - Read/Download File

near-tip fields of mode iii steady-state crack propagation in elastic
The mode III asymptotic fields near a steadily propagating crack tip are ... order of ten times the tensile yield stress [3, 4]. ... model fits within the general framework of couple-stress theory and involves ... Linear isotropic hardening is introduced below. ... Mode III Crack Propagation in Elastic-Plastic Strain Gradient Solids. 215 .
[ iutamvolmodoIII.pdf - Read/Download File

MODE I CRACK PROPAGATION IN ELASTIC— PLASTIC
near a crack tip for elastoplastic materials under mode I conditions has been ... case of JZ-flow theory with linear hardening was first studied by Amazigo and ... dilatancy, that generally is an overestimation of the dilatancy observed in the ... elastoplastic solids with the Drucker—Prager yield condition and linear-isotropic  ...
[ bigoni_radi_93.pdf - Read/Download File

On macroscopic and microscopic analyses for crack initiation and
Initiation and Crack Growth Toughness in Ductile Alloys ... linear elastic stress intensity factor, K~c, is generally deter- mined at the onset of ... hardening exponent (n), and whether plane stress or plane .... analyses of the local singular fields yield, for linear elastic ..... For an elastic-perfectly plastic solid, the Mode III solu-.
[ 1985_Ritchie_MetTransA_OnMacroscopic.pdf - Read/Download File

Fracture Mechanics - Materials Technology - TU/e
Sep 6, 2012 ... III. 7 Multi-mode crack loading. 63. 7.1 Stress component transformation . ..... Stress-strain curves may show linear, nonlinear, hardening and softening behavior. ... Using yield criteria (Von Mises, Tresca), the crack tip plastic zone ... They are generally related to the amount of dissipated energy during crack.
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Adopted from pdflib image sample (C) - [email protected]
May 14, 1993 ... strain crack growth in the limiting case of non-hardening materials. ..... and Drugan (1991) for large-scale and general yielding conditions. Corresponding work for linearly-hardening, elastic-plastic solids has been done by Ponte Castaneda. (1987), and for ... In contrast, in Mode III crack growth and in plane.
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w. Brocks', TM duo“, s. Fricke“ - Gruppo Italiano Frattura
Mode I in Steady Crack Growth with Linear Hardening Materials w. Brocks' ... Recently, a more general solution throughout the range from small-scale yielding .
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Validity of Asymptotic Crack Tip Solutions for Plastic Materials
Department of Strength of Materials and Solid Mechanics, The Royal ... with low linear or power law hardening and a viscoplastic material with a ... stationary cracks in small scale yielding modus I and III loading conditions. ... Generally it is possible to derive asymptotic solutions .... Mode III Stationary rcr - 7r (exp(nA) — 1).
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The mode I crack growth resistance of metallic foams
models in non-linear fracture mechanics analysis are appropriate, in order to place ... rigorous account of crack tip constraint effects in the presence of SSY or general .... is replaced by a compressible elastic–plastic power-law hardening solid, .... mode I crack in metallic foams, the assumptions of small scale yielding and ...
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Small Scale Yielding Model for Fracture Mechanics - Comsol
used to compare published linear elastic fracture ... displacement, strain and stress ahead of a crack. ... function to define the post-yield hardening ... using displacement conditions as a crack tip displacement field for. Mode I:. ... For the solid .... 3. 2 sin2θ . (16). The LEFM solution for the radius of the plastic zone as a ...
[ koppenhoefer_paper.pdf - Read/Download File

Plane-strain mixed-mode near-tip fields in elastic perfectly plastic
crack in an elastic perfectly plastic Mises solid under small-scale yielding ... The asymptotic plane-strain and plane-stress crack-tip fields for both power-law hardening ... The displacements due to the leading singular terms of the linear elastic ... mode I and mode II stress intensity factors of the far-field, and ~i(0, v) x and ~i(0, ...
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DYNAMIC CRACK PROPAGATION IN ELASTIC-PLASTIC SOLIDS
many helpful discussions on the general subject of Solid Mechanics. ... classes of materials, namely elastic-perfectly plastic materials, linear hardening ma- ... Under conditions of Mode 1, plane stress, steady state and small scale yielding, ..... on Mode III nonuniform crack extension problems lifted the restriction of constant.
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Uncoupled, asymptotic mode III and mode E crack tip solutions in
Complete asymptotic solutions for the mode III, longitudinal or anti-plane shear, and mode E ... is specified by an initial linear response, a segment of non- hardening switching behavior, i.e. .... related to the yield stress and coercive field by ..... The analysis of dislocation, crack and inclusion problems in piezoelectric solids.
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On the Path-Dependence of the J-integral Near a Stationary Crack
quantity for the analysis of the mechanical fields near crack tips in both linear elastic ... in an elastic-power-law hardening material under small scale yielding conditions. ... for mode III, the J-integral is path-independent for small scale yielding. .... In the out-of-plane direction generalized ..... hidden by the solid flow theory.
[ J-Integral.pdf - Read/Download File

Linear Fracture Mechanics - What It Is, What It Does
which had taken place below general yield; it is found that such failures .... (II). The edge sliding mode. The crack surfaces move normal to the crack front and ...... work-hardening characteristics. .... On the parabolic crack in an elastic solid.
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Large Scale Yielding Fatigue Crack Growth - DiVA
Department of Solid Mechanics. KTH School of ... fatigue crack growth under both small scale yielding and large scale yielding. ... 5.1.2 General Trends of Crack Closure in Constant Load .... The anti-plane shearing mode called Mode III, is more ...... plastic, bi-linear stress strain relationship with kinematic hardening and a.
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