Results 211 to 220 of about 8,161 (264)

A ductile damage model corresponding to the dissipation of ductility of metal

Engineering Fracture Mechanics, 1996
Although some damage models have been proposed for many years, the initiation of ductile macrocracks of metal under complicated stress states can not be appropriately predicted; the reason for this condition is that deformation in fact dissipating ductility of metal is not taken as the starting point of these damage theories.
M. Zheng, C. Hu, Z.J. Luo, X. Zheng
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Modelling of the damage in ductile steels

Computational Materials Science, 1996
Abstract The nucleation, growth and coalescence of voids result in ductile fracture of materials. The first coalescence of voids defines crack initiation. In order to describe the initiation behaviour of a controlled rolled structural steel FeE 460 quantitatively, experimental investigations and micromechanical modelling were conducted.
N. Schlu¨ter, F. Grimpe, W. Bleck, W. Dahl   +3 more
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Damage Evolution in Ductile Materials

International Journal of Damage Mechanics, 1996
A continuum damage evolution model for ductile materials is derived from the principles of incremental complementary energy and thermodynamics. In accordance with this model, the evolution of damage is dependent on the accumulated strain, the stress triaxiality ratio, and the strain hardening exponent of the material.
Yanghu Mou, Ray P. S. Han
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Modeling of Damage of Ductile Materials

2019
The paper discusses a thermodynamically consistent anisotropic continuum damage model for ductile metals. It takes into account different elastic potential functions to simulate the effect of damage on elastic material behavior. In addition, a yield condition and a flow rule describe plastic behavior whereas a damage criterion and a damage rule ...
Michael Brünig, Moritz Zistl, Steffen Gerke   +2 more
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A damage model for ductile metals

Nuclear Engineering and Design, 1989
Abstract A physically-based theory of damage for ductile metals is outlined. It rests upon a direct extension of the authors recently proposed viscoplastic model for finite deformations to include the effects of dislocation—void interactions as they manifest themselves in void nucleation, growth, and coalescence.
D.J. Bammann, E.C. Aifantis
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On an Isotropic Damage MechanicsModel for Ductile Materials

International Journal of Damage Mechanics, 2001
A new model for combined elastoplasticity and damage is proposed. The model is based on the maximum dissipation principle and implements a strong coupling between plasticity and damage. First the evolution equations of different kinds of phenomenological damage models for ductile materials are discussed.
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A CDM Approach of Ductile Damage with Plastic Compressibility

International Journal of Fracture, 2006
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Chaboche, J. L., Boudifa, M., Saanouni, K.   +2 more
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On the dynamic evolution of ductile damage

International Journal of Fracture, 1996
In the present report some numerical results on the evolution equation of microvoids under quasi-static simplification (without consideration of inertial effect) are given in terms of the increasing rate of porosity versus external stress at different damage levels and in various damage stages at different material viscosities.
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Bifurcation Effects in Ductile Metals With Nonlocal Damage

Journal of Applied Mechanics, 1994
The purpose of this paper is to investigate some bifurcation phenomena in a porous ductile material described by the classical Gurson (1977) model, but with a modified, nonlocal evolution equation for the porosity. Two distinct problems are analyzed theoretically: appearance of a discontinuous velocity gradient in a finite, inhomogeneous body, and ...
Leblond, J. B., Perrin, G., Devaux, J.
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Ductile Damage Evolution and Strain Path Dependency

AIP Conference Proceedings, 2007
Forming limit diagrams are commonly used in sheet metal industry to define the safe forming regions. These diagrams are built to define the necking strains of sheet metals. However, with the rise in the popularity of advance high strength steels, ductile fracture through damage evolution has also emerged as an important parameter in the determination ...
Tasan, C.C., Hoefnagels, J.P.M., Peerlings, R.H.J., Geers, M.G.D., Horn, ten, C.H.L.J., Vegter, H.   +5 more
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