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Stiffness degradation in cracked cross-ply laminates
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0001-9649-8621
1998 (English)In: Science, technologies and applications: ECCM-8, European Conference on Composite Materials, 3 - 6 June 1998, Naples, Italy / [ed] Ignazio Crivelli Visconti, Cambridge: Woodhead Publishing Materials , 1998, p. 573-580Conference paper, Published paper (Refereed)
Abstract [en]

model for stiffness reduction in cross-ply laminates based on generalized plane strain assumptions is developed. Simple analytical expressions are obtained for longitudinal modulus and Poisson's ratio reduction as a function of transverse crack density. Additionally to the crack density, these expressions contain only elastic and geometrical properties of constituent laminae and the average crack opening displacement (COD) normalized with respect to the far-field strain. Calculations of COD are performed using FEM and several analytical models based on shear lag assumptions and variational analysis. Their predictive capabilities are verified using comparison with experimental data and FEM results. A simple procedure is suggested for COD determination, requiring for a given material only one FEM calculation using 'an average laminate' with 'an average crack spacing'. The obtained COD is used with good results for stiffness prediction for a wide variety of laminates of this material

Place, publisher, year, edition, pages
Cambridge: Woodhead Publishing Materials , 1998. p. 573-580
National Category
Composite Science and Engineering
Research subject
Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-26969Local ID: 03fce4a0-670b-11de-9f57-000ea68e967bISBN: 1-85573-377-3 (print)OAI: oai:DiVA.org:ltu-26969DiVA, id: diva2:1000150
Conference
European Conference on Composite Materials : 03/06/1998 - 06/06/1998
Note
Godkänd; 1998; 20090702 (andbra)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved

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Varna, Janis

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