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| The staggered grid material point method (SGMP) simulation of phase transformation in hyper-velocity impact |
| Received:August 16, 2023 Revised:October 05, 2023 |
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| DOI：10.7511/jslx20230816006 |
| KeyWord:hyper velocity impact staggered grid material point method modified metal model phase transformation |
| Author | Institution |
| 周若璞 |
清华大学 航天航空学院, 北京 |
| 曾治鑫 |
清华大学 航天航空学院, 北京 |
| 张雄 |
清华大学 航天航空学院, 北京 |
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| Abstract: |
| The structural damage process under hyper-velocity impact is always accompanied by material phase transformation, fracture and formation of debris cloud.Its numerical simulation is difficult due to the high pressure discontinuity, material nonlinearity and large geometric deformation.The staggered grid material point method (SGMP) eliminates the cross-grid error of material point method (MPM) through the background grid center integral.Therefore SGMP is an effective numerical analysis method for simulating extreme large deformation and material failure problems such as solid shock and explosion.In this paper, GRAY equation of state and Johnson-Cook modified metal model are introduced into SGMP to simulate the hyper-velocity impact with single-layer and multilayer targets.The results show that SGMP with the modified metal model can simulate the morphology and phase transition effect of debris cloud in hyper-velocity impact. |