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Damage development and stiffness reduction in laminates in out-of-plane loading
RISE, Swerea, Swerea SICOMP.
LuleƄ University of Technology.
RISE, Swerea, Swerea SICOMP.
RISE, Swerea, Swerea SICOMP.
2014 (English)In: 16th European Conference on Composite Materials, ECCM 2014Conference paper, Published paper (Refereed)
Abstract [en]

Simple approach based on Classical Laminate Theory (CLT) and effective stiffness of damaged layer is suggested for bending stiffness determination of laminate with intralaminar cracks in surface 90-layers. The effective stiffness of layer with cracks as a function of crack density is back-calculated comparing in-plane stiffness of laminates with and without damage. The accuracy of the CLT and effective stiffness approach is demonstrated comparing with bending stiffness results from FEM simulated 4-point bending test on laminate with damage. Analytical model for damaged laminate stiffness is presented which gives similar values for effective stiffness as FEM calculations for unit cell. Effect of local delaminations initiated from transverse cracks is analyzed.

Place, publisher, year, edition, pages
European Conference on Composite Materials, ECCM , 2014.
Keyword [en]
Analytical modeling, Bending stiffness, FEM, Intralaminar crack
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:ri:diva-13080Scopus ID: 2-s2.0-84915750600ISBN: 9780000000002 (print)OAI: oai:DiVA.org:ri-13080DiVA: diva2:973276
Conference
16th European Conference on Composite Materials, ECCM 2014
Available from: 2016-09-22 Created: 2016-09-22Bibliographically approved

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