DYNAMIC FAILURE INVESTIGATIONS IN POLYMERS

摘要

The use of dynamic photoelasticity in the examination of the crack tip stress field in the asymmetric impact loading configuration is discussed in this paper. The high-speed photographs indicate that a K-dominant field is not established over a length of even 1 mm in the short time scales of this experiment. The isochromatic fringe patterns indicate that the shear stress does reaches a high enough magnitude to cause yielding and shear localization.