ぜい性高分子材料の破壊形成に及ぼす動的効果 : 第1報,破面粗さに関する考察

抄録

Fracture dynamics of Homalite-100, PMMA and epoxy were studied. Fracture surfaces were examined by a roughness meter to correlate the surface roughness λ with such fracture parameters as crack velocity a^^· and crack extension resistance R^*. High-speed photography of fracture caustic images gave those values. Correlations between λ and those parameters have shown that, although λdepends on a^^· or on R^*, λ is not a unique function of one of those parameters. It is found that λ has the best correlation with the product R^*· a^^·, i.e., dissipated energy per unit crack front and unit time.