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Damage development and stiffness reduction in laminates in out-of-plane loading
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. Swerea.
Swerea.
2014 (English)In: 16th European Conference on Composite Materials, ECCM 2014: Seville, Spain, 22 - 26 June 2014, European Conference on Composite Materials, ECCM , 2014Conference 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
Research subject
Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-37558ScopusID: 84915750600Local ID: b9f6ea2b-3372-4574-9a0b-3232e750a996ISBN: 9780000000002OAI: oai:DiVA.org:ltu-37558DiVA: diva2:1011056
Conference
European Conference on Composite Materials : 22/06/2014 - 26/06/2014
Note
Godkänd; 2014; 20141217 (andbra)Available from: 2016-10-03 Created: 2016-10-03Bibliographically approved

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