A unified model for metal failure capturing shear banding and fracture
نویسندگان
چکیده
منابع مشابه
Two-dimensional perturbations in a scalar model for shear banding.
We present an analytical study of a toy model for shear banding, without normal stresses, which uses a piecewise linear approximation to the flow curve (shear stress as a function of shear rate). This model exhibits multiple stationary states, one of which is linearly stable against general two-dimensional perturbations. This is in contrast to analogous results for the Johnson-Segalman model, w...
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Microcompression testing is used to probe the uniaxial stress–strain response of a nanocrystalline alloy, with an emphasis on exploring how grain size and grain boundary relaxation state impact the complete flow curve and failure behavior. The yield strength, strain hardening, strain-to-failure and failure mode of nanocrystalline Ni–W films with mean grain sizes of 5, 15 and 90 nm are studied u...
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Thermomechanical deformations of a body made of two different materials and undergoing simple shearing deformations are studied with the objectives of finding out when and where adiabatic shear bands will initiate and how they will subsequently grow. Each material is modeled as strain and strain-rate hardening but thermally softening. A shear band is presumed to have formed if the introduction ...
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the objective of analyzing the localization of deformation infO narrow bands of inDe-Shin Liu tense straining. Two different loadings, namely, the top and bOllom surfaces :.'ubjected to a prescribed tangential velocity, and these two surfaces subjected {O a Department of Mechanical and Aerospace preassigned normal velocity, are considered. In each case a material defect, flaw, or Engineering an...
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Nuclear reactions in a lattice are described using an extension of the resonating group method to include the lattice explicitly. Phonon exchange during fusion and dissociation reactions is predicted Second-order site-other-site reactions are predicted under conditions where the reactions at each site exchange phonons with a common phonon mode. The null reaction in which a dd-fusion at one site...
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ژورنال
عنوان ژورنال: International Journal of Plasticity
سال: 2015
ISSN: 0749-6419
DOI: 10.1016/j.ijplas.2014.08.016