and Multiaxial Compression at Dierent Strain Rates and Temperatures

The influence of strain rate, temperature and conning pressure on the mechanical behavior of PBXN-110 binder \inert " (HTPB, Hydroxy-terminated Polybutadiene) and PBXW-128 simulant \inert " that is mixed with small particles of sugar, approximately 50 % by weight, is presented. The polymer PBXN-110 is used as the matrix for the particle reinforced polymer composite (PBXW-128); the latter is the mock or inert equivalent of actual explosive material. The stress-strain response of both polymeric materials under uniaxial compression is dependent on the strain rate. On the other hand, it is observed that PBXW-128 exhibits temperature dependent behavior, while the mechanical response of PBXN-110 is not signicantly aected at temperatures above the glass transition temperature. Compression experiments in the presence of conning pressure reveal that the stress-strain responses of both materials are rate insensitive