屈曲状態におけるナイロンモノフィラメントの引張特性-I : 引張強度の減少について

概要

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As one of the fundamental studies on the tensile strength of a fishing gear material, we describe the determination of the tensile strength and the breaking mechanism of nylon mono-filament stretched in a loop hung around a cylinder attached to a tension tester. The tensile strength was measured by varying the value of d0/D (ratio of the initial diameter d0 of nylon mono-filament to the diameter D of the cylinder). The tensile strength decreased rapidly when d0/D increased and was about half at d0/D=1. The cross-sectional form of the bending nylon mono-filament looked approximately like a semi-ellipse. Let us put the orthogonal coordinate x-y in this semi-ellipse. The tensile strength F acting on the cross-section is then calculated by the following equation, F=2∑σ•x•Δy, where σ is the stress at the parallel line to the x-axis. The calculated results showed a similar tendency to the experimental results.
公益社団法人日本水産学会の論文