Results 201 to 210 of about 1,562,663 (239)

Continuous Damage of Brittle Solids

1987
Some elastic solids fail not through macro — fracture or plastic flow, but rather through growth of micro — defects. Modelling of such processes occurs through theories of continuous damage mechanics. Thermodynamic aspects of one such theory are discussed in this paper, focussing on limitations of admissible processes, energy dissipation in a loading —
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Surface damage in brittle materials

2001
It has long been recognized that structural modifications of the surface layers of materials induced by mechanical processing may affect adversely the performance of engineering components in service. Traditionally, the most deleterious changes have manifested themselves as residual stresses that lower the fatigue life or distort the shape of metallic ...
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Gradient-extended brittle damage modeling

2020
An elastic-brittle anisotropic model is presented based on the work by Fassin et al. (2019a). After discussing the local model equations and the incorporation of crack-closure, the gradient extension using the micromorphic approach according to Forest (2009) is briefly summarized.
T.T. Nguyen, M. Fassin, R. Eggersmann, S. Reese, S. Wulfinghoff   +4 more
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Brittle Damage Mechanics of Rock Mass

2010
In this chapter, special aspects of brittle damage mechanics are considered, related to the various frameworks by which the behavior of a brittle damaged material can be postulated, still considering the damaged medium as a global continuum. The basic framework of CDM is recalled, stressing the concepts of effective stress and the ways of introducing ...
Wohua Zhang, Yuanqiang Cai
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Damage Theories for Brittle and Ductile Materials

1987
The background of continuum damage theory is presented in the framework of thermodynamics of irreversible processes. The assumption on intrinsic dissipation yields the constitutive equations of the material. Conjugate state variables are interpreted as “generalized forces”. Scalar and tensorial damage theories are discussed.
H. D. Bui, C. Stolz
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Brittle Fracture and Damage of Brittle Materials and Composites Statistical-Probabilistic Approaches

2016
Flaws are the principal source of fracture in many materials, whether brittle or ductile, whether nearly homogeneous or composite. They are introduced during either fabrication or surface preparation or during exposure to aggressive environments (e. g. oxidation, shocks). The critical flaws act as stress concentrators and initiate cracks that propagate
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A note on brittle damage description

Mechanics Research Communications, 1989
M. Basista, D. Gross
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Coupled microplane and micromechanics model for describing the damage and plasticity evolution of quasi-brittle material

International Journal of Plasticity, 2023
Cunbao Li
exaly  

A variational view of brittle damage evolution

2006
Under time-dependent loading an elastic material undergoes the simplest form of damage in which it passes from its original state to a weaker elastic state. Elaborating on prior work [14], we establish the existence of a relaxed variational evolution where, at each time, the two states of the material combine to form a fine mixture, optimal from the ...
FRANCFORT G, GARRONI, Adriana
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A nonlocal constitutive model for damageable brittle and quasi-brittle materials

58th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2017
Zhenyuan Gao, Liang Zhang, Wenbin Yu
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