Abstract
The physical fields in porous materials under strong shock wave reaction are very complicated. We simulate such systems using the grain contact material point method. The complex temperature fields in the material are treated with the morphological characterization. To compare the structures and evolution of characteristic regimes under various temperature thresholds, we introduce two concepts, structure similarity and process similarity. It is found that the temperature pattern dynamics may show high similarity under various conditions. Within the same material, the structures and evolution of high-temperature regimes may show high similarity if the shock strength and temperature threshold are chosen appropriately. For process similarity in materials with high porosity, the required temperature threshold increases parabolically with the impact velocity. When the porosity becomes lower, the increasing rate becomes higher. For process similarity in different materials, the required temperature threshold and the porosity follow a power-law relationship in some range.
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Xu, A., Zhang, G., Li, H. et al. Temperature pattern dynamics in shocked porous materials. Sci. China Phys. Mech. Astron. 53, 1466–1474 (2010). https://doi.org/10.1007/s11433-010-4063-5
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DOI: https://doi.org/10.1007/s11433-010-4063-5