A MODE-III CRACK WITH VARIABLE SURFACE EFFECTS

作者：Wang, Xu^*; Schiavone, Peter

来源：Journal of Theoretical and Applied Mechanics, 2016, 54(4): 1319-1327.

DOI：10.15632/jtam-pl.54.4.1319

• surface elasticity
• variable surface moduli
• mode-III crack
• Cauchy singular integro-differential equation

We study the contribution of variable surface effects to the antiplane deformation of a linearly elastic material with a mode-III crack. The surface elasticity is incorporated using a modified version of the continuum based surface/interface model of Gurtin and Murdoch. In our discussion, the surface moduli are not constant but vary along the crack surfaces. Using Green's function method, the problem is reduced to a single first-order Cauchy singular integro-differential equation, which is solved numerically using Chebyshev polynomials and a collocation method. Our results indicate that the gradient of the surface shear modulus exerts a significant influence on the crack opening displacement and on the singular stress field at the crack tips.

• 出版日期2016
• 单位华东理工大学