Numerical study of the deformations of two coplanar circular cracks during their coalescence
Consider two planar circular cracks embedded in an infinite linear elastic media and submitted to mode I tensile loading.Bueckner-Rice weight functions theory allows us to update the stress intensity factor when the crack fronts are slightly deformed in their plane.Using an incremental numerical method based on this theory,we study the propagation of these two cracks when they interact each other taking into account the non-linearities induced by their deformations.The advantage of this method in comparison to more standard finite element methods is that only the crack fronts have to be meshed.Using a Griffith threshold law,we notice important deformations of the crack fronts are observed and a drastically decreasing threshold loading when the fronts approach each other.
Brittle fracture Toughening Finite element method Elastic line model
L.Legranda V.Lazarus
aUPMC Univ Paris 6,CNRS,UMR 7190,Institut Jean Le Rond dAlembert,France Univ Paris-Sud,UPMC Univ Paris 6,CNRS,UMR 7608,FAST,France
国际会议
北京
英文
1-8
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）