Modelling low velocity impact induced damage in composite laminates

The paper presents recent progress on modelling low velocity impact induced damage in fibre reinforced composite laminates. It is important to understand the mechanisms of barely visible impact damage (BVID) and how it affects structural performance. To reduce labour intensive testing, the development of finite element (FE) techniques for simulating impact damage becomes essential and recent effort by the composites research community is reviewed in this work. The FE predicted damage initiation and propagation can be validated by Non Destructive Techniques (NDT) that gives confidence to the developed numerical damage models. A reliable damage simulation can assist the design process to optimise laminate configurations, reduce weight and improve performance of components and structures used in aircraft construction

Modelling low velocity impact induced damage in composite laminates

The paper presents recent progress on modelling low velocity impact induced damage in fibre reinforced composite laminates. It is important to understand the mechanisms of barely visible impact damage (BVID) and how it affects structural performance. To reduce labour intensive testing, the development of finite element (FE) techniques for simulating impact damage becomes essential and recent effort by the composites research community is reviewed in this work. The FE predicted damage initiation and propagation can be validated by Non Destructive Techniques (NDT) that gives confidence to the developed numerical damage models. A reliable damage simulation can assist the design process to optimise laminate configurations, reduce weight and improve performance of components and structures used in aircraft construction

Criteri di rottura macroscopici per materiali stratificati

The aim of the work is to define a strength criterion for layered materials, constituted by the regular superposition of layers which can be individually assumed to be homogeneous and isotropic. To this end, the homogenization theory for heterogeneous periodic media is applied to limit analysis. Dealt with are the cases of purely cohesive components, components endowed with cohesion and friction, as well as layers with friction alternated with reinforcing metallic strips (reinforced soils). The validity of the theoretical results obtained is checked through comparisons with experimental results of other researchers

Analysis of the stability of reinforced soil structures using a homogenisation procedure

Translated from French (Rev. Fr. Geotechnique 1987 (41) p. 29-43)Available from British Library Document Supply Centre- DSC:9057.2457(TRRL-Trans--3438)T / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo