Fracture of rubbers under biaxial loading:A criterion based upon the intrinsic defect concept
Since the use of rubbers has been widespread in many industrial applications these last decades,the structures integrity including rubber parts requires the mechanical capabilities of such materials to be known and mastered.To prevent failure in the designing process,it is necessary to provide strong criteria taking into account not only their highly extensible capability but also the complex multiaxial loadings to which they could be subjected.In this work,the intrinsic defect concept is introduced and coupled in the fracture mechanics framework with the J integral in order to derive a multiaxial fracture criterion.Mechanical tests up to failure on rubber specimens subjected to monotonic biaxial loading paths were achieved on two materials.The fracture criterion requires as an input the critical value of the J integral which was also experimentally measured on CCT specimen.A generalized expression of the J integral under biaxial loading is proposed on the basis of finite element calculations on a representative volume element containing a small circular defect.The estimated failure elongations were found in very nice agreement with experimental data on the two kinds of rubber materials.Moreover,we have also outlined the predicting capability of this approach when applied to thermoplastic elastomers.
Rubber J integral fracture criterion intrinsic defect
Moussa Na(i)t Abdelaziz Fahmi Za(i)ri Nourredine A(i)t Hocine
Université Lille 1 Sciences et Technologies,Laboratoire de Mécanique de Lille,F-59655 Villeneuve dA Université Fran(c)ois Rabelais de Tours,Laboratoire de Mécanique et Rhéologie,F-41034 Blois,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）