论文部分内容阅读
This paper deals with the initiation and non-coplaner propagation ofcracks under biaxial compression.The running process of the propagating cracks issuccessfully recorded with the method of dynamic photoclasticity.A series of importantfracture parameters such as cracks’ propagating velocity,critical opening loading andinitial angle of cracks’ growth under hiaxial compression is calculated.Results showthat the stress field in front of the non-closed crack tip under biaxial compression is amixed-mode singular field,the dynamic propagation of the new tensile cracks is juststable and shows distinct stages,but the unstable crack appears under high loads andresults in the rupture of the matrix.
This paper deals with the initiation and non-coplaner propagation ofcracks under biaxial compression. The running process of the propagating cracks issuccessfully recorded with the method of dynamic photoclasticity. A series of important fracturing parameters such as cracks’ propagating velocity, critical opening loading and inial angle of of cracks’ growth under hiaxial compression is calculated. Results showthat the stress field in front of the non-closed crack tip under biaxial compression is amixed-mode singular field, the dynamic propagation of the new tensile cracks is just unstable and shows distinct stages, but the unstable crack appears under high loads and results in the rupture of the matrix.