Approximate model for blunt objects indenting cohesive‐frictional materials

摘要: SUMMARY An approximate two-dimensional model for indentation of blunt objects into various types rigid-perfectly plastic cohesive-frictional material is derived. Particular emphasis placed on considering as a process involving evolution the boundary displaced by indenter. Force–penetration relationships are obtained an incremental approach utilizing key kinematic and static information from flat punch. Albeit approximate, proposed applies to arbitrary indenter geometry weightless or ponderable materials exhibiting associated non-associated flow. Two specific geometries, cylinder wedge, explored in detail. Favorable agreement found between analytic results those using finite element method (FEM). For both wedge cylinder, it further shown that accurate expressions relating force explicitly penetration can be In case material, predictions derived very close computed implicit equations available literature. Copyright © 2011 John Wiley & Sons, Ltd.