An experimental method to determine the critical energy release rate associated with longitudinal compressive failure in CFRP
2013 (English)In: Proceeding of the 19th international conference on composite materials (ICCM 19), 2013Conference paper (Refereed)
A test specimen for measurement of the critical energy release rate associated with longitudinal compressive failure is proposed. High strains are localized by decreasing the out-of-plane thickness towards the anticipated damage region which consists of a unidirectional (UD) laminate. Thus, the compressive fibre failure mode is isolated. Microscopic studies show that the UD-material fails in a kinking mode. A method based on a generalized form of the J-integral and full-field measurements of the strain field is developed to extract the fracture energy. The fracture energy in four experiments is measured to be 20-40 kN/m. Finite element simulations are performed to validate the experimental results. The essential features of the response are captured by modelling the damage region with cohesive elements.
Place, publisher, year, edition, pages
CFRP, compressive failure, kink-band, cohesive zone model
Research subject Technology
IdentifiersURN: urn:nbn:se:his:diva-8585ISBN: 978-0-9696797-1-4OAI: oai:DiVA.org:his-8585DiVA: diva2:660015
19th International Conference on Composite Materials, July 28-August 2, 2013, Montréal, Canada