http://swrc.ontoware.org/ontology#InProceedings
Numerical simulation of shock attenuation in solids
en
hypervelocity impact
asteroid collision
planetesimal
shock wave attenuation
shock wave propagation
shock wave interaction
elastic wave
computerized simulation
三谷 典子
井田 茂
渡邊 誠一郎
Mitani Noriko
Ida Shigeru
Watanabe Seiichiro
宇宙航空研究開発機構宇宙科学研究本部
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)
Proceedings of the 28th ISAS Lunar and Planetary Symposium
98-101
1995-12
We have investigated numerically the propagation and the attenuation of shock wave produced by impact events of solid, in order to understand hypervelocity impact fragmentation of planetesimals. We adopt a non-linear elastic-plastic model, which is more realistic than the plastic-rigid model used in previous works. We found that the peak stress attenuates rapidly in the region where the stress becomes comparable to the material strength. This is considerably different from the previous estimate which claims the attenuation becomes slow there as in the case of ideal gas. The rapid attenuation is due to double shock and rarefaction structure, which is characteristic to elastic-plastic material, and the attenuation rate is almost independent of material parameters.
資料番号: AA0063352026