Evaluation Using Digital Image Correlation and Finite Element method of Stress Intensity Factors and T-stress
A controlled crack growth in PMMA was achieved in Wedge-Splitting Test (WST) by regulating the cross-head speed of loading by a computer-driving testing device.The fracture behavior of a crack propagating was investigated quantitatively by both numerical modeling and experiment using Finite Element Method (FEM) and Digital Image Correlation (DIC).A twoparameter fracture mechanics approach,describing the near-crack-tip stress field,was applied to determine the stress intensity factor (SIF) and the coefficient of higher order term (T-stress).In both methods,it was shown that the stress intensity factor versus crack length remains constant whereas the T-stress varies from negative to positive.This later variation is similar to the three point bend beam,but different from the compact tension specimen,for which the T-term is always positive.Using Digital Image Correlation (DIC),the stress intensity factor and T stress were estimated with 10% and 15% uncertainty in a complex loading set-up without having to do a numerical modeling of the experiment.
Crack path propagation Digital Image Correlation Finite Element Method Stress intensity factor T-stress
M.L.Hattali H.Auradou M.Fran(c)ois V.Lazarus
Laboratoire FAST,Université Paris-Sud,Université Pierre et Marie Curie-Paris 6,CNRS,Bat.502,Campus Univ.,Orsay,F-91405,France
国际会议
北京
英文
1-9
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）