期刊
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
卷 93, 期 5, 页码 510-526出版社
WILEY-BLACKWELL
DOI: 10.1002/nme.4398
关键词
cohesive zone model; dynamic fracture; frictional contact; mixed mode loading; masonry wallette; numerical methods
资金
- Swiss National Foundation [200021 122046/1]
We present a model that combines interface debonding and frictional contact. The onset of fracture is explicitly modeled using the well-known cohesive approach. Whereas the debonding process is controlled by a new extrinsic traction separation law, which accounts for mode mixity, and yields two separate values for energy dissipation in mode I and mode II loading, the impenetrability condition is enforced with a contact algorithm. We resort to the classical law of unilateral contact and Coulomb friction. The contact algorithm is coupled together to the cohesive approach in order to have a continuous transition from crack nucleation to the pure frictional state after complete decohesion. We validate our model by simulating a shear test on a masonry wallette and by reproducing an experimental test on a masonry wall loaded in compression and shear. Copyright (C) 2012 John Wiley & Sons, Ltd.
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