First Order Analysis of Stiffness Reduction Due to Matrix Cracking.
1992 (English)In: Journal of composite materials, ISSN 0021-9983, E-ISSN 1530-793X, Vol. 26, no 7, 10009-1030 p.Article in journal (Refereed) Published
In this paper the reduction in effective elastic constants of composite lami nates due to matrix cracking is considered. A general easily applicable theory valid for two- and three-dimensional analysis of thin as well as thick laminates is presented. The theory is based on the change of elastic energy in a laminate at the appearance of a matrix crack in one layer. This information combined with a dilute approximation , i.e., different matrix cracks are considered not to interact with each other, is utilized to estimate the re duction of elastic constants for a certain crack density. The theory is asymptotically exact for nk « 1, where nk is the number of cracks per unit thickness of the cracked ply and a correct value of the slope of the stiffness reduction crack density curve is obtained at nk = 0.
Place, publisher, year, edition, pages
1992. Vol. 26, no 7, 10009-1030 p.
Mechanical Engineering Materials Engineering
IdentifiersURN: urn:nbn:se:kth:diva-25508DOI: 10.1177/002199839202600704OAI: oai:DiVA.org:kth-25508DiVA: diva2:358826
QC 201010252010-10-252010-10-25Bibliographically approved