Journal ArticleDOI
A finite element study of the near crack tip deformation of a ductile material under mixed mode loading
TLDR
In this paper, a large deformation finite element analysis was made to study the deformation, stress and strain, and void ratio near the crack tip under mixed mode plane strain loading conditions, employing Gurson's constitutive equation which has taken into account the effects of void nucleation and growth.Abstract:
In ductile fracture, voids near a crack tip play an important role. From this point of view, a large deformation finite element analysis has been made to study the deformation, stress and strain, and void ratio near the crack tip under mixed mode plane strain loading conditions, employing Gurson's constitutive equation which has taken into account the effects of void nucleation and growth. The results show that: (i) one corner of the crack tip sharpens while the other corner blunts, (ii) the stress and strain distributions except for the near crack tip region, can be superimposed by normalizing distance from the crack tip by a crack tip deformation length, i.e., a steady-state solution under a mixed mode condition has been obtained, (iii) the field near a crack tip can be divided into four characteristic fields ( K field, HRR field, blunted crack tip field, and damaged region), and (iv) the strain and void volume fraction become concentrated in the sharpened part of a crack tip with increasing Mode II component.read more
Citations
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Journal ArticleDOI
Fracture of wood under mixed-mode loading Part I: Derivation of fracture criteria
TL;DR: In this article, a mixed mode I/II fracture criterion for cracks oriented both along and across the fibres in wood is derived within the framework of linear elastic fracture mechanics, and the applicability of the fracture criterion to spruce is experimentally validated in part two of the paper.
Journal ArticleDOI
Mixed mode (I and II) crack tip fields in bulk metallic glasses
TL;DR: In this article, the impact of internal friction or pressure sensitivity on the plastic zone deformation, stress and plastic strain fields is examined for different mode mixities under mixed mode loading.
Journal ArticleDOI
Elastic-plastic fracture behavior of an aluminum alloy under mixed mode loading
TL;DR: In this paper, mixed-mode elastic-plastic fracture tests were carried out by using A5083-O aluminum alloy compacttension-shear specimens, in which the angle between the loading axis and the crack surface was varied from 90° (mode I) to 0°(mode II) by employing a special loading device.
Journal ArticleDOI
Mixed-mode I/II fracture behaviour of an aluminium alloy
N. Hallbäck,F. Nilsson +1 more
TL;DR: In this article, the location and orientation of incipient shear band development was investigated in a comparative manner, which indeed showed some resemblance to the experimentally observed features, and the shift in initiation behaviour seemed to result in an increase of fracture toughness.
Journal ArticleDOI
A combined modeling–experimental study of the crack opening displacement fracture criterion for characterization of stable crack growth under mixed mode I/II loading in thin sheet materials
TL;DR: In this paper, the authors presented a complete set of simulation studies and experimental measurements for crack growth under nominally mode I/II conditions for thin sheet 2024-T3 aluminum under combined tension (mode I) and in-plane shear (mode II) loading conditions.
References
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Journal ArticleDOI
On the ductile enlargement of voids in triaxial stress fields
James R. Rice,D.M. Tracey +1 more
TL;DR: In this article, a variational principle is established to characterize the flow field in an elastically rigid and incompressible plastic material containing an internal void or voids, and an approximate Rayleigh-Ritz procedure is developed and applied to the enlargement of an isolated spherical void in a nonhardening material.
Journal ArticleDOI
Singular behaviour at the end of a tensile crack in a hardening material
TL;DR: In this paper, a total deformation theory of plasticity, in conjunction with two hardening stress-strain relations, is used to determine the dominant singularity at the tip of a crack in a tension field.
Journal ArticleDOI
Finite deformation analysis of crack-tip opening in elastic-plastic materials and implications for fracture
TL;DR: In this article, a finite element method was used to analyze the deformation field around smoothly-blunting crack tips in both non-hardening and hardening elastic-plastic materials, under contained plane-strain yielding and subject to mode I opening loads.
Journal ArticleDOI
Combined mode fracture via the cracked Brazilian disk test
TL;DR: In this article, an analysis is made of the cracked Brazilian disk test and various approximations for the stress intensity factors of a crack aligned at any direction to the applied load are given.
Journal ArticleDOI
Ductile fracture by cavity nucleation between larger voids
TL;DR: In this article, a model of ductile fracture involving the interaction of relatively large voids with small-scale voids is studied by a computational model, where the larger voids are described as circular cylindrical holes arranged in a doubly periodic array in the initial state.
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