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A platform for research: civil engineering, architecture and urbanism
Material Damage Description via Structured Deformations
Abstract The proposed micro-macro model describes the behavior of damaged materials with rough fractures, whose cohesive-frictional sliding is considered at the continuum level by using the recent “Structured deformation theory”, now set in the classical thermodynamic formulation for generalized standard materials. The shear-induced dilatation due to crack surmounting is here considered by assuming an equivalent shape function for crack-lip roughness, and the material internal variables are reduced to one scalar parameter, associated with the smeared-crack slip. Remarkably, the structured-deformation approach renders the model fully-associated in type, even in the presence of friction. Even if no evolution of crack density and orientation is supposed, a good description of the response of cracked masonry or concrete walls under seismic-like shear loading are provided by the model. Interesting instabilities in the shearing path are exhibited, suggesting a possible generalization of the Mohr-Coulomb criterion.
Material Damage Description via Structured Deformations
Abstract The proposed micro-macro model describes the behavior of damaged materials with rough fractures, whose cohesive-frictional sliding is considered at the continuum level by using the recent “Structured deformation theory”, now set in the classical thermodynamic formulation for generalized standard materials. The shear-induced dilatation due to crack surmounting is here considered by assuming an equivalent shape function for crack-lip roughness, and the material internal variables are reduced to one scalar parameter, associated with the smeared-crack slip. Remarkably, the structured-deformation approach renders the model fully-associated in type, even in the presence of friction. Even if no evolution of crack density and orientation is supposed, a good description of the response of cracked masonry or concrete walls under seismic-like shear loading are provided by the model. Interesting instabilities in the shearing path are exhibited, suggesting a possible generalization of the Mohr-Coulomb criterion.
Material Damage Description via Structured Deformations
François, Marc (author) / Royer-Carfagni, Gianni (author)
2005-01-01
19 pages
Article/Chapter (Book)
Electronic Resource
English
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