Shear strength measurements in a shock loaded commercial silastomer

J C F Millett (1) , G Whiteman (1) , S M Stirk (1) , N K Bourne (1)

1 AWE

Reviewer 1. The discussion of c0 and S after equation 5 has been amended to avoid confusion. Editorial Board Comments. Figure 1 has been amended to include a side view of the target assembly which should aid interpretation. The caption has also been altered to reflect this The shock induced shear strength of a commercial silastomer, trade name Sylgard 184 TM has been determined using laterally mounted manganin stress gauges. Shear strength has been observed to increase with increasing shock amplitude, in common with many other materials. Shear strength has also been observed to increase slightly behind the shock front as well. It is believed that a combination of polymer chain entanglement and cross linking between chains is responsible. Finally, a ramp on the leading edge of the lower amplitude stress traces has been observed. It has been suggested that this is due to shock induced collapse of free space between the polymer chains. Similar explanations have been used to explain the apparent non-linearity of the shock velocity with particle velocity at low shock amplitudes.

Mots clés: Physical Sciences

J C F Millett, G Whiteman, S M Stirk, N K Bourne. Shear strength measurements in a shock loaded commercial silastomer. Journal of Physics D: Applied Physics, 2011, 44 (18), pp.185403. ⟨10.1088/0022-3727/44/18/185403⟩. ⟨hal-00614341⟩