Is there a thickness effect on compressive strength of unnotched composite laminates?
Journal
International Journal of Fracture
Journal Volume
95
Journal Issue
44565
Pages
143-158
Date Issued
1999
Author(s)
Daniel I.M
Abstract
The effect of laminate thickness was investigated on the compressive behavior of unidirectional and crossply composites. A recently developed compression test method for thick composites was used to test specimens from 16 to 200-plies thick. In all cases the stress-strain behavior to failure is nonlinear and failure strength is matrix dominated. Longitudinal compressive failure is triggered by matrix failure accompanied by fiber microbuckling and the compressive strength is greatly degraded by initial fiber misalignment. The longitudinal compressive strength shows a mild trend of decreasing values with increasing thickness. It can be explained that, even if such a trend is significant, increasing size would have a diminishing effect on compressive strength for initial fiber misalignments greater than 1.5 to 2°. © 1999, Kluwer Academic Publishers.
Subjects
Compressive Behavior; Compressive Failure; Compressive Strength; Kink Band; Thickness Effect
SDGs
Other Subjects
Alignment; Compression testing; Failure (mechanical); Laminated composites; Composite laminate; Compression test method; Compressive behavior; Compressive failure; Cross-ply; Fibre misalignment; Kink bands; Laminate thickness; Thick composites; Thickness effect; Compressive strength
Type
journal article