Fracture Surface Energy Measurement at High Crack Speed Using a Strip Specimen : Application to Rubber Toughened PMMA

C. Fond , R. Schirrer

An experimental procedure is proposed to measure the lowest elastic stored energy density leading to a rapid crack propagation (RCP) in polymeric materials. A strip specimen with a blunt saw cut is uniformly loaded and a razor is pushed into the saw cut to initiate the crack. The very high crack velocity which is reached is measured with a resistive coating on the sample surface. Results obtained for a rubber toughened PMMA show that fracture energy for RCP at approximately 500 m/s is much smaller than that in a quasi static tests. The material exhibits a ductile-brittle transition under particular loading conditions.

Domaines: Articles anciens

C. Fond, R. Schirrer. Fracture Surface Energy Measurement at High Crack Speed Using a Strip Specimen : Application to Rubber Toughened PMMA. Journal de Physique IV Proceedings, 1997, 07 (C3), pp.C3-969-C3-974. ⟨10.1051/jp4:19973163⟩. ⟨jpa-00255453⟩