Pre-kinking analysis of a mixed-mode crack in a magnetoelectroelastic layer
A mixed-mode crack in a magnetoelectroelastic layer under in-plane mechanical,electric and magnetic loadings is considered for electrically and magnetically impermeable crack surface conditions.Fourier transforms are applied to reduce the mixed-boundary-value problem of the crack to a system of singular integral equations.The asymptotic fields near the crack tip are obtained in an explicit form and the corresponding field intensity factors are obtained.The exact solution for a crack in an infinite magnetoelectroelastic material can be recovered if the width of the layer tends to infinity.The crack kinking phenomenon is investigated by applying the criterion of maximum hoop stress intensity factors.The results show that the size of the layer and the electric and magnetic loadings have significant effects on the singular field distributions around the crack tip,and the hoop stress intensity factors are influenced by the material parameters,the electric loadings and the geometric size ratios.
Mixed-mode crack Magnetoelectroelastic layer Singular integral equations Crack kinking Hoop stress intensity factor
Keqiang Hu Zengtao Chen
Department of Mechanical Engineering,University of New Brunswick,Fredericton NB E3B 5A3,Canada
国际会议
北京
英文
1-10
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）