Dynamic Inelasticity of Polymer-Matrix Composites.
Abstract
A novel experimental configuration that can record projectile velocity histories and target back surface out-of-plane motion in penetration experiments has been developed. The technique was used to investigate failure mechanisms during ballistic impact of an S-2 glass fiber woven composite with 60% fiber volume fraction. Microscopy studies performed on recovered samples clearly show interply delamination, fiber breakage, ply inelasticity, and fiber kinking as the major failure modes in these composites. Recorded penetrator velocity histories indicate these failure mechanisms are rate dependent. Pressure-shear recovery experiments were performed to investigate the out-of-plane dynamic shear resistance of the composite. Microstructural analyses revealed that at low impact velocities, 2 GPa compressive stresses, matrix cracking and matrix-fiber debonding are the primary damage mechanisms. At higher impact velocities, 4 GPa compressive stresses, fiber microcracking becomes pronounced.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 16, 1996
- Accession Number
- ADA313646
Entities
People
- Horacio D Espinosa
Organizations
- Purdue University