Cracking simulation of ceramic materials under thermal shock by a non-local fracture model
In this work,we attempted to simulate the cracking process of ceramic beams subjected to quenching from different high temperatures to the ambient one.Based on a non-local damage theory and the linear fracture mechanics,a numerical model was established and implemented into a finite element code.This model is adjusted with two critical situations: it is equivalent to the maximum principal stress criterion when the specimen is subjected to uniform tensile stress and to the Griffith-Irwin criterion for the growth of a macro-crack.By using this numerical model,the initiation and propagation of cracks in quenched ceramic specimens were simulated.It was proved that the proposed damage model is capable to describe the detailed cracking process with high reliability comparing to the experimental results.Several typical characteristics in thermal shock failure such as the multi-cracking procedure,the hierarchical crack distribution,the distances between cracks etc.were faithfully described with high accuracy.
Thermal shock Crack patterns Non-local fracture model Numerical simulations Ceramics
Li Jia Song Fan Jiang Chiping
LSPM,CNRS UPR 3407,Université Paris XIII,Villetaneuse,France State Key Laboratory of Nonlinear Mechanics,Institute of Mechanics,Chinese Academy of Sciences,Beiji Solid Mechanics Research Center,Beijing University of Aeronautics and Astronautics,Beijing,China
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）