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URN: urn:nbn:de:swb:90-741729

Compression fracture of CFRP laminates containing stress intensifications

Leopold, Christian; Schütt, Martin; Liebig, Wilfried V.; Philipkowski, Timo; Kürten, Jonas; Schulte, Karl; Fiedler, Bodo

Abstract:
For brittle fracture behaviour of carbon fibre reinforced plastics (CFRP) under compression, several approaches exist, which describe different mechanisms during failure, especially at stress intensifications. The failure process is not only initiated by the buckling fibres, but a shear driven fibre compressive failure beneficiaries or initiates the formation of fibres into a kink-band. Starting from this kink-band further damage can be detected, which leads to the final failure. The subject of this work is an experimental investigation on the influence of ply thickness and stacking sequence in quasi-isotropic CFRP laminates containing stress intensifications under compression loading. Different effects that influence the compression failure and the role the stacking sequence has on damage development and the resulting compressive strength are identified and discussed. The influence of stress intensifications is investigated in detail at a hole in open hole compression (OHC) tests. A proposed interrupted test approach allows identifying the mechanisms of damage initiation and propagation from the free edge of the hole by causing a d ... mehr


Zugehörige Institution(en) am KIT Institut für Fahrzeugsystemtechnik (FAST)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator ISSN: 1996-1944
URN: urn:nbn:de:swb:90-741729
KITopen ID: 1000074172
Erschienen in Materials
Band 10
Heft 9
Seiten Art.Nr.: 1039
Schlagworte stacking sequence, scaling, free-edge, open-hole, compression after impact (CAI), fractography, scanning electron microscopy (SEM), kink-band
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