Measurement of dynamic fracture energy in brittle polymer : 2nd Report : Effect of visco-plastic deformation

Abstract

Dynamic fracture of PMMA was studied using a Cranz-Schardin high-speed camera. The single-edge-notched specimen was pin-loaded with special fixtures so that it could split and fly away after the fracture. The flying velocity was measured to estimate the elastic energy store in the specimen. In this report, the nonelastic energy was estimated from the visco-plastic deformation to correlate with the external work applied to the specimen.