Shock Absorption Capability of a Single-Crystal Beta-Aluminum-Bronze Rod.

摘要

Slender single-crystal beta-aluminum-bronze rods exhibited large recoverable strains and large hysteresis upon buckling under static and dynamic cyclic loading conditions at room temperature. The cyclically buckled rods dissipated between 25and 49percent of the input energy which is comparable to that for cyclically stretched rubber. During buckling only the regions at the bends,about two inches of the rod,were strained,participated in the energy dissipation process,and experienced a reversible martensitic phase change. Both the static and dynamic tests were repeatable and reproducible with a given rod. The rod-end impacts showed no adverse effects on the rod material. After each impact the material reverted to its pre-impact condition. Because the loading cycle was repeatable and since a large amount of input energy was dissipated,the buckling slender single-crystal beta-aluminum-bronze rod shows capability of shock absorber application.