Dynamic stress intensity factors of an interfacial crack in orthotropic elastic strips under impact loading conditions

Abstract

The present article deals with the investigation of elasto-dynamic response of a finite crack under normal and shear impact loading situated at the interface of two semi-infinite orthotropic strips. Laplace and Fourier Integral transforms are employed to reduce the transient problem to the solution of a pair of dual integral equations in the Laplace transform plane which are solved using iterations in the low frequency domain. The analytical expressions of stress intensity factors of the crack at the interface problem are found. To determine time dependence of the parameters, these equations are inverted to yield the dynamic stress intensity factors for some fiber-reinforced orthotropic composite materials using Bellman method and the method given by H. Dubner and J. Abate. The results are depicted through graphs for different particular cases. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim