New typologies of 3-dimensional composite materials are being developed during the last few years. These new materials constituted by braided, weft or warp knitted and 3-D weaved composites pre-forms, present excellent out of plane mechanical properties. In this paper, tubular energy absorbers built up from carbon-glass hybrid braided composites are analysed by means of finite element method, with explicit integration along time of the dynamical balance equation. A new material model for braided composites is introduced in the open finite element codes by means of subroutines. Braided materials with carbon fibre 0-degree directions, glass fibre on +/- alpha directions are studied. Moreover, different fibre orientation angles and geometry of the triggering devices are analysed in order to obtain the optimum configuration in terms of specific energy absorption.
Crashworthiness simulation of braided composite tubes for energy absorbers
Simulation der Aufprallschutzgüte eines Schlauchgewebe-Komposits als Energieabsorber
2000
8 Seiten, 16 Bilder, 5 Tabellen, 8 Quellen
Aufsatz (Konferenz)
Englisch
3-dimensionales Nähen , Bindungsart (Webware) , CFK (carbonfaserverstärkter Kunststoff) , Energieabsorption , Finite-Elemente-Methode , Flechtware , GFK (glasfaserverstärkter Kunststoff) , Hybridverbundwerkstoff , Komposit , Schieflast , Schlauchgewebe , Sicherheitsfaktor , Simulation , Steifigkeit , Unfallschutz , Verbundfaser , Zuverlässigkeit von Bauelementen
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