Author(s)

W. Becker

Abstract

Mathematical simulation of external and internal damage due to low velocity impact W. Becker Division, Department for Composite Structural Analysis and Development, D-88039 Friedrichshafen, Germany ABSTRACT In the following study an attempt was made to model the external and in- ternal damage areas due to low velocity impact. A simple static and dynamic stress analysis approach was used in order to reproduce the three-dimensional strain and stress field during impact loading, using the finite element method. Damage was predicted with the aid of standard and modified failure criteria for composite materials, selecting between the main failure modes fibre breakage, matrix damage, and delamination. The general approach is valid for generally, arbitrary anisotropic materials and was verified by experiments with standard as well as exotic composite materials. INTRODUCTION Several approaches have been made in the past in order to analyse the stress and strain fields in composite materi

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