EFFECT OF SHEAR ON PLASTIC DENTING OF CYLINDERS

The purpose of this paper is to study the effect of ''inplane shear'' on the damage experienced by an unstiffened circular cylindrical shell subjected to static knife loading at the middle of its length. The en ds of the cylinder are assumed to be fully fixed. The material constit utive model is rigid-plastic. Only ''local'' behavior is analyzed and global effects are neglected. The methodology can be applied to earlie r models as proposed by Wierzbicki and Suh and by Moussouros. Like the earlier two rigid-plastic models this analysis only obtains global qu antities and can result in large nondimensional dent values prior to r eaching its limits of applicability. However, it is shown that the non dimensional load increases with the geometrical characteristic ratio o f radius to thickness (alh). This functional form has been obtained he re for the first time and represents a novel result. The paper also sh ows that the present model compares well with experimental results.