Some Interesting Mechanical Behaviors of Fiber Composite Materials

摘要

In the course of studies of the mechanical behaviors of aramid/epoxy and the high-strength glass/epoxy composites, two interesting but puzzling behaviors were observed. First, when a sustained tensile load is removed any time before stress-rupture failure, the composites retain almost their full original strengths. Second, the contribution of a high-elongation, low-modulus matrix to the performance of a simple glass composite seems to be surprisingly little. These results have raised questions about the validity of the strength retention test as well as the usefulness of a low-modulus matrix in fiber composites. (ERA citation 04:003995)