Author(s)

F. Ferber. 0. Hinz & K.P. Herrmann

Abstract

Numerical and experimental modelling of crack systems in homogeneous and nonhomogeneous solids F. Ferber. 0. Hinz, K.P. Herrmann ABSTRACT An overview about the numerical simulation and experimental modelling of cracks arising in plane disk-like models of two-phase composite structures will be given. Shadow optical and photoelastic data were collected from digitally sharpened caustics and isochromatic fringe patterns by using a digital image analysis system. The shadow optical method represents an important tool for the experimental determination of stress intensity factors at the tips of quasistadcally extending and fast running cracks, respectively. Further, the method of caustics can be used for the investigation of plastic zones around crack tips propagating in ela- sto-plastic materials, for mixed-mode crack problems and other stress concen- tration problems in the vicinity of holes and bores as well as for the evaluation of contact problems. The geometry of the caustics is propor

Keywords