Abstract：There are many uncertainty factors such as crack length, material properties and external load, etc in cracked structure, and the crack propagation path uncertainty analysis is necessary for a better understanding of their mechanical properties including damage and fracture and predicting the performance and reliability. This paper proposes a crack propagation path analysis method in random cracked structure, which is suitable for mixed-model load. The method takes into consideration the randomness of crack length, material properties and external load, etc and adopts the Monte Carlo method to random sampling from random parameter space. The scaled boundary finite element method is adopted to calculate the stress intensity factors and simulate the crack propagation path. On this basis, a statistical analysis method is presented to obtain the crack propagation path statistical properties in random cracked structure. Finally two numerical examples are presented for verification of the validity of the proposed method.
2014, Vol. 35 
