Dynamic effects on fracture surface formation in brittle polymers. 1st report Examination of surface roughness.

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 (491) , 1324-1331
https://doi.org/10.1299/kikaia.53.1324

Abstract

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.

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