A new macroscopic model based on non-local interactions to predict damage and failure in quasibrittle materials
The purpose of this paper is to propose a new macroscopic approach to describe the evolving non-local interactions during damage and failure in quasi-brittle materials.A new integral-type non-local model is proposed where the weight function is directly built from these interactions.The structure is considered as an assembly of inclusions,which are successively elastically dilated in order to characterize the transfer of information inside the material.By this way,the new macroscale weight function takes into account intrinsically the interactions evolution during the material failure similarly as a mesoscale model does.This new model is first validated on simple 1D cases and its performances are compared with the performances of other models proposed in the literature.It is shown that the new model is able to describe the continuous/discrete transition during the dynamic failure of a rod.It is also shown that the new model is able to describe boundary effect during a spalling test.Finally,the model is used to predict damage and failure during 3 points bending fracture tests on notched and unnotched concrete beams.
Non-local model interactions damage quasi-brittle materials
Laura B.Rojas-Solano David Grégoire Gilles Pijaudier-Cabot
Univ Pau & Pays Adour,LFC-R,UMR5150,64600 Anglet,France
国际会议
北京
英文
1-10
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）