Journal
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
Volume 38, Issue 6, Pages 434-439Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijimpeng.2010.10.013
Keywords
Impact cratering; Hydrocode modeling; Porosity; Solar system
Categories
Funding
- Natural Environment Research Council [NE/E013589/1] Funding Source: researchfish
- Science and Technology Facilities Council [ST/G002452/1] Funding Source: researchfish
- NERC [NE/E013589/1] Funding Source: UKRI
- STFC [ST/G002452/1] Funding Source: UKRI
Ask authors/readers for more resources
We describe improvements to the epsilon-alpha porous compaction model for simulating solar system impacts. To improve the treatment of highly porous materials, we modified the epsilon-alpha model to account for thermal expansion of the matrix during compaction. We validated the improved model by demonstrating good agreement between numerically computed Hugoniot curves for porous iron (up to initial porosities of similar to 80%) using the improved epsilon-alpha model and experimentally-derived Hugoniot data. Moreover, we verified that the model improvements are easily implemented into a hydrocode and preserve the efficiency advantage of a strain-based compaction function. We used the improved epsilon-alpha porous compaction model in the iSALE hydrocode to reproduce 2-km/s porous-target laboratory impact experiments. The simulation results were in qualitative agreement with the experiments but produced craters that were consistently deeper and larger in volume than the experiments. The results of the hydrocode simulations and laboratory experiments show a reduction in crater efficiency with increasing porosity. This reduction is more dramatic if the impactor density and velocity are higher. (C) 2010 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available