ナイロンモノフィラメントの伸長による切断機構

概要

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In order to investigate the fracture mechanism of nylon 6 monofilaments, the fracture processes of the filaments during elongation were observed by a microscopic camera and an electron microscope. In a simple elongation, the surface crazes at right angles to the direction of elongation changed into cracks which penetrated into the filament before the breaking strain was reached. About 10 cracks per cm developed into diamond-shaped cavities and the filaments broke on the largest cavity. The breaking of the filaments did not depend on a particular crack since cracks grew competitively. In a loop elongation, the surface crazes on the outer side of a bend changed simultaneously into cracks before breaking. The crack on the center of a bend developed into the largest cavity and the filaments broke on those points. In a knot elongation, the surface crazes on steeply bent regions changed into cracks. Various types of cracks were formed by a knot deformation.
社団法人日本家政学会の論文
1996-05-15