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

概要

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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.<BR>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.<BR>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.
社団法人日本材料学会の論文