FRP板における強度特性に対する応力集中部の干渉効果について

抄録

Numerous investigations have been carried out on the mechanical behaviors of fiber reinforced plastics (FRP) with a single notch. But there are few studies on the effect of interference of many notches in FRP.
This paper deals with the laminated composites containing multiple circular holes arranged as follows; (1) a single row of holes parallel to the load axis, (2) a single row of holes normal to the load axis, (3) a single row of holes with a certain angle to the load axis, (4) a diamond pattern of holes with one hole in its center, (5) a diamond pattern without a central hole.
The relation between the breaking strength and the arrangement of holes in these materials subjected to tensile load is discussed, and the stress distribution in the vicinity of a hole is measured by photoelastic test and strain gauge test. The empirical equation involving the effect of interference of holes is proposed, which showes a good agreement with the experimental data.