Abstract
Damage mechanisms and accumulation and associated stiffness reductions were investigated in crossply graphite/epoxy laminates subjected to tensile cyclic loading. Damage development consists of transverse matrix cracking, followed by longitudinal matrix cracking, local delaminations at crack intersections, and ultimately longitudinal fiber fractures of the primary load carrying plies. The reduction in axial modulus, even in normalized form, is a function of the cyclic stress level. The degradation of in-plane shear modulus was also monitored and found to be highly sensitive to longitudinal matrix cracking. The relationship between stiffness degradation and residual fatigue life was discussed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 149-160 |
| Number of pages | 12 |
| Journal | American Society of Mechanical Engineers, Applied Mechanics Division, AMD |
| Volume | 92 |
| State | Published - 1988 |
| Event | Mechanics of Composite Materials, 1988 - Berkeley, CA, USA Duration: Jun 20 1988 → Jun 22 1988 |
ASJC Scopus subject areas
- Mechanical Engineering