Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
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 (Autor:in) / Royer-Carfagni, Gianni (Autor:in)
01.01.2005
19 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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