期刊
JOURNAL OF DYNAMIC BEHAVIOR OF MATERIALS
卷 5, 期 1, 页码 51-58出版社
SPRINGERNATURE
DOI: 10.1007/s40870-019-00183-1
关键词
Kolsky bar; Frequency response; Silicone foam; Silicone rubber; Energy dissipation; Shock mitigation
资金
- U.S. Department of Energy's National Nuclear Security Administration [DE-NA-0003525]
Silicone foam is used as a shock mitigation material in a variety of systems to protect internal components from being damaged during external shock or impact loading. Characterizing the shock mitigation response of silicone foam under a variety of scenarios is a critical step in designing and/or evaluating new shock mitigation systems. In this study, a Kolsky bar with pre-compression capability was used with a passive radial confinement tube to subject the sample to various levels of pre-strain followed by impact loading. The effects of both pre-strain and impact velocity on impact energy dissipation behavior were investigated for silicone foam. The energy dissipation response of silicone foam is compared to a silicone rubber manufactured using the same processing methods to understand the energy dissipation characteristics of silicone foams transitioning to a silicone rubber. The final density of the foam or rubber plays a key role in both the total energy dissipation ratio in the time domain and the energy dissipation ratio as a function of frequency in the frequency domain.
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