General solutions of a central crack in a strip sandwiched between two different outer layers

Abstract

In order to sufficiently discuss the result of interface cracks in bimaterial systems, we shall first give the general solution † † The general solutions of a central crack in a strip sandwiched between the same two outer layers under normal stress and shear stress have been found by Sih[1]. of a strip with a central crack sandwiched between two dissimilar outer layers subjected to plane extension or in-plane shear alone. With the help of the special case of this problem, the result of a central crack at the interface between two different media under the normal stress or shear stress may easily be found. It is more important to find the conclusion again, that the stress intensity factors K I and K II cannot appear at the same time in an infinite plate weakened by a central crack at the interface between two dissimilar layers, and that they are independent of material constants under normal or shear stress only.