Abstract
Transverse perpendicular impact on long rubber strings of 0.140 and 0.277 in. dia was studied using a special apparatus consisting of a system of oscilloscopes, stroboscopes, camera and air pressure gun. The rubbers used in tests came from two manufacturers and were classified as pure gum rubbers. Three different initial stretches λ 0 were chosen for each string, and the impact velocities ranged from 1000 to 3000 in. sec. Maximum stretch, kink angles and impact velocities were measured and the following relations recorded : nominal stress vs stretch, kink angle vs impact velocity, maximum stretch λ max vs impact velocity and the difference λ max − λ 0 vs non-dimensional impact velocity. Some of the results are compared with the theoretical data for the Mooney-Rivlin and the Isihara-Hashitsume-Tatibana-Zahorski materials, and others with the results of theoretical equations upon inserting experimental data.
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