A COMPARISON OF THE HIGH STRAIN RATE BEHAVIOUR IN COMPRESSION OF POLYMERS AT 300K AND 100K

S. Walley , John Field , N. Safford

The mechanical response of a number of widely used ductile polymers has been investigated in compression at strain rates of ca. 2.5x103s-1, both at room temperature (ca. 300K) and at liquid nitrogen temperatures (ca. 100K). A direct impact Hopkinson bar (DIHB) was used to measure the polymer stress-strain curves at this strain rate at both temperatures. High-speed photography (interframe time 7 µs) was a major tool in determining the fracture strain at both temperatures, particularly for those polymers that had such large failure strains that they did not fail within the time window of the DIHB (285µs).

Domaines: Articles anciens

S. Walley, John Field, N. Safford. A COMPARISON OF THE HIGH STRAIN RATE BEHAVIOUR IN COMPRESSION OF POLYMERS AT 300K AND 100K. Journal de Physique IV Proceedings, 1991, 01 (C3), pp.C3-185-C3-190. ⟨10.1051/jp4:1991324⟩. ⟨jpa-00250466⟩