Dynamic effects on fracture surface formation in brittle polymers. 2nd report. Examination of surface markings.

1 January 1987

journal article
Published by Japan Society of Mechanical Engineers in TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A

Vol. 53 (495) , 2128-2133
https://doi.org/10.1299/kikaia.53.2128

Abstract

The dynamic fracture surface formation of PMMA and epoxy was studied. Fracture parameters such as crack velocity a^^· and crack extension resistance R^* were obtained by high-speed photography of fracture caustic images. The density of surface marking was also obtained by examination of the fracture surfaces. Correlations between the density μ and the fracture parameters have shown that, although μ depends on a^^· or on R^*, μ is not a unique function of one of those parameters. It is found that μ has the best correlation with the product R^*· a^^·, i.e., dissipated energy per unit crack front and unit time.

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