Lokales kumuliertes Schadensmaß für Komposite ‐ Rißspitzen ohne Singularität

Abstract

A pointwise probability density for failure initiation is proposed regarding the evaluation of damaged composite structures. The local cumulative damage measure accounts for both the accumulation of local stochastic microdamaging and the load redistribution to undestroyed subregions. It bases on the global failure rate of heterogeneous composites. Firstly the damage behaviour of beams under load is studied. Secondly it is proved that stress redistribution by a crack tip damage zone yields to the disappearence of singularity dominated stress fields.