Dynamic Fracture in Viscoelastic Solids.
Annual rept. no. 1, Aug 78-Aug 79,
CALIFORNIA INST OF TECH PASADENA GRADUATE AERONAUTICAL LABS
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The purpose of our studies is to gain fundamental information on the failure of elastomers, both unfilled and filled with particulate material specially to determine the amount of fragmentation that occurs on failure under dynamic conditions. Experimental information sought relates to crack velocity and crack branching. At present we are studying the onset of crack propagation, and possible crack branching in elastomers using high speed cinematography under loads induced with an electromagnetic loading device. In this report we describe the material preparation, experimental technique and some preliminary results obtained on crack growth in Solithane a polyurethane elastomer. Author