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On the nonlocal computational modelling of damage in brittle and quasi-brittle materials
2020 24th International Conference on Circuits, Systems, Communications and Computers (CSCC), 2020Computational prediction of progressive micro-cracking, observed namely in brittle and quasi-brittle materials, resulting in their softening behaviour, needs some regularization approach. Its social relevance increases with the massive application of steel fibre-reinforced concrete and similar composites in buildings and engineering structures. However,
Jiri Vala +2 more
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Validating Theories for Brittle Damage
Metallurgical and Materials Transactions A, 2007Validating simulated predictions of internal damage within armor ceramics is preferable to simply assessing a model’s ability to predict penetration depth, especially if one hopes to perform subsequent “second strike” analyses. We present the results of a study in which crack networks are seeded by using a statistically perturbed strength, the median ...
Rebecca M. Brannon +2 more
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Damage-Resistant Brittle Coatings
Advanced Engineering Materials, 2000Laminate structures consisting of hard, brittle coatings andsoft, tough substrates are important in a wide variety of engi-neering applications (cutting tools, electronic multilayers, la-minated windscreens), biological structures (teeth and dentalcrowns, shells, bones), and traditional pottery (ceramicglazes).
Lawn, BR +7 more
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GRADIENT ENHANCED DAMAGE FOR QUASI-BRITTLE MATERIALS
International Journal for Numerical Methods in Engineering, 1996Summary: Conventional continuum damage descriptions of material degeneration suffer from loss of well-posedness beyond a certain level of accumulated damage. As a consequence, numerical solutions are obtained which are unacceptable from a physical point of view.
Peerlings, R.H.J. +3 more
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Friction-damage coupled model for brittle materials
Engineering Fracture Mechanics, 2004By considering a tensorial description of the damage and of the unilateral and frictional effects on the displacement jump across the crack faces, an anisotropic constitutive model based on the assumption of linear elastic matrix weakened by microcraks is derived.
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2011
Besides ductile materials considered hitherto, a variety of brittle materials, like concrete, rocks and ceramics, are widely employed in engineering practice. Their mechanical behavior can not be described by the elastic-plastic damage theory or by the viscoplastic damage theory discussed already.
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Besides ductile materials considered hitherto, a variety of brittle materials, like concrete, rocks and ceramics, are widely employed in engineering practice. Their mechanical behavior can not be described by the elastic-plastic damage theory or by the viscoplastic damage theory discussed already.
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Numerical Simulation of Brittle Damage in Concrete Specimens
Strength of Materials, 2005A framework for damage mechanics of concrete is applied to simulate the nonlinear elastic deformation behavior of concrete using finite element method (FEM). A rather simple isotropic damage model containing essentially no adjustable parameters is shown to produce results in remarkably good agreement with sample experimental data: the damage law ...
Labadi, Y., Hannachi, N.E.
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A Variational View of Partial Brittle Damage Evolution
Archive for Rational Mechanics and Analysis, 2006zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Francfort, Gilles A., Garroni, Adriana
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Constitutive Inequalities for the Damage of Elastic-Brittle Materials
Materials Science Forum, 2011Starting from the requirement that the principle of determinism be satisfied, two constitutive inequalities are derived for one-dimensional strain- and stress-based continuum damage models. The one-dimensional constitutive inequality corresponding to the strain-based formulation turns out to be much less restrictive than the one associated to the ...
He, Qi-Chang, Zhou, J.Z.
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A theory of damage in brittle materials
Engineering Fracture Mechanics, 1990Abstract The present paper addresses the geometric representation of damage in brittle solids, its equation of evolution and its incorporation in the constitutive equation. The concept of a damage coordinate is introduced and a thermodynamic derivation of the evolution equation follows. A continuum damage theory ensues.
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