Strain Concentration Assessment of Laminates Subjected to Low Velocity Impact
Abstract
Low velocity impact upon composite laminates can lead to both apparent and non-apparent damage zones that result in structural strain concentrations. The strain concentrations can be, or grow to be, larger than permissible design levels through static or cyclic loading conditions thus drastically reducing the structural integrity of the composite component. In this paper, glass/epoxy composite coupons in three laminate orientations were damaged by low velocity impact that create a damage zone consisting of local fiber breakage and delamination. Conventional moire was then used to measure strain concentration as a function of applied tensile load. Correlations were made between impact energy, delamination area, strain concentration, and laminate orientation.... Composite materials, Low velocity impact, Moire analysis, Strain analysis.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1993
- Accession Number
- ADA264497
Entities
People
- Robert F. Anastasi
- Steven M. Serabian
Organizations
- United States Army Research Laboratory