Pre-kinking analysis of a cracked piezoelectric strip under impact loadings
An impermeable crack in a piezoelectric strip at arbitrary position under in-plane mechanical and electric impact loadings is considered. Due to the asymmetry of the geometry, this crack problem is a mixed-mode one. Fourier and Laplace 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 explicit form and hoop and shear stress intensity factors are defined. Laplace inversion transforms are applied to get the dynamic hoop stress intensity factors. The crack kinking phenomena is investigated by applying the criterion of maximum hoop stress intensity factors. Numerical results show that the geometry of the cracked strip and the electric loadings have effects on the singular field distributions around the crack tip, and the hoop stress intensity factors are influenced by the material parameters, the electric loading and the geometric size ratios.
Mixed-mode crack Piezoelectric Strip Singular integral equations Crack kinking Hoop stress intensity factor
Zengtao Chen Keqiang Hu
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）