A new cohesive-zone model is presented based on the combination of an elastic-damage formulation, which simulates the interface decohesion, and a friction contact model. The classical mesomechanic assumption is made whereby a representative area of the interface can be additively decomposed into an undamaged part and a damaged part, so that the ratio between the damaged part and the total area represents a damage parameter ranging from 0 to 1. The main idea consists of adding a Coulomb-like friction term for the stress only on the damaged part of the interface, while the decohesion model takes into account mixed-mode fracture and specializes to piecewise linear interface laws for pure-mode problems. Numerical results are presented for the simulation of a benchmark test for the analysis of concrete dams, in which the proposed model is used to simulate the behaviour of the soil-concrete interface at the base of the dam.

A cohesive interface model based on damage and friction

G. ALFANO
;
E. SACCO
2005

Abstract

A new cohesive-zone model is presented based on the combination of an elastic-damage formulation, which simulates the interface decohesion, and a friction contact model. The classical mesomechanic assumption is made whereby a representative area of the interface can be additively decomposed into an undamaged part and a damaged part, so that the ratio between the damaged part and the total area represents a damage parameter ranging from 0 to 1. The main idea consists of adding a Coulomb-like friction term for the stress only on the damaged part of the interface, while the decohesion model takes into account mixed-mode fracture and specializes to piecewise linear interface laws for pure-mode problems. Numerical results are presented for the simulation of a benchmark test for the analysis of concrete dams, in which the proposed model is used to simulate the behaviour of the soil-concrete interface at the base of the dam.
9788890318801
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/715488
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