Recently my attention has been drawn to the above-mentioned article in which Dr. Qizhi employed the so-called section method for deriving an approximate analytical expression for the SIF for a penny-shaped crack in an inf'mitely long cylinder subjected to uniform axial load. The method is widely used in problems of structural mechanics. Probably Parton and Morozov first employed this method in ...

In this paper we shall investigate the normal surface displacement of the isotropic elastic half-space z > 0, due to a normal point force, F, which moves with constant speed, V, in the xdirection over the surface z = 0. This problem defines the Green's function for a class of elastodynamic contact problems for the half-space in which a frictionless rigid indenter moves at constant speed over th...

Several methods for the analysis of composite materials with periodic microstructure in which localized effects (such as concentrated loads, cracks and stationary/progressive damage) occur are resented. Owing to the loss of periodicity caused by these localized effects, it is no longer possible to identify and analyse a repeating unit cell that characterizes the periodic composite. For elastost...

When Symmetric Galerkin boundary element method (SGBEM) is applied to Neumann problems, the displacement solution cannot be uniquely determined because of the inevitable rigid-body-motion term involved. In this paper, this phenomenon is discussed, and methods for the removal of rigid body motions are introduced and investigated. In geotechnical engineering, half-space problems are encountered q...