Thermal cracking in scaled composite laminates

Authors
Citation
Dp. Johnson, Thermal cracking in scaled composite laminates, J ADV MATER, 33(1), 2001, pp. 3-6
Citations number
17
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Material Science & Engineering
Journal title
JOURNAL OF ADVANCED MATERIALS
ISSN journal
1070-9789 → ACNP
Volume
33
Issue
1
Year of publication
2001
Pages
3 - 6
Database
ISI
SICI code
1070-9789(200101)33:1<3:TCISCL>2.0.ZU;2-K
Abstract
It has been noted in the literature that polymer-matrix composite laminates containing thick blocks of like-oriented plies may exhibit matrix cracking due only to thermal loads during cooldown from autoclave temperatures. In the study of geometrically scaled laminates, matrix cracking is of particul ar interest. While smaller coupons with fewer blocked plies may not crack d ue to thermal loads only, larger coupons of scaled dimensions may. This occ urs even though all sizes of coupons experience the same thermal cycle. The present paper addresses the issue of first-ply failure of geometrically scaled laminated composites. First-ply failure data for a [0(n)/90(n)/0(n) ](T) laminate where n = 1 - 6, are compared to a model incorporating therma l strains. A good agreement is found between analytical and experimental re sults. Matrix failure of larger specimens (in the absence of mechanical loa ds) is predicted.