A 2D particle contact-based meshfree method and its application to hypervelocity impact simulation

Feng Chun; Li Shi-hai; Liu Xiao-yu

doi:10.11883/1001-1455(2014)03-0292-08

Volume 34 Issue 3

Aug. 2014

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Article Navigation > Explosion And Shock Waves > 2014 > 34(3): 292-299

Feng Chun, Li Shi-hai, Liu Xiao-yu. A 2D particle contact-based meshfree method and its application to hypervelocity impact simulation[J]. Explosion And Shock Waves, 2014, 34(3): 292-299. doi: 10.11883/1001-1455(2014)03-0292-08

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Feng Chun, Li Shi-hai, Liu Xiao-yu. A 2D particle contact-based meshfree method and its application to hypervelocity impact simulation[J]. Explosion And Shock Waves, 2014, 34(3): 292-299. doi: 10.11883/1001-1455(2014)03-0292-08

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A 2D particle contact-based meshfree method and its application to hypervelocity impact simulation

doi: 10.11883/1001-1455(2014)03-0292-08

Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China

Funds: Supported by the National Natural Science Foundation of China (11302230); the National Basic Research Program of China (973 Program) (2010CB731506)

Received Date: 2012-10-25
Publish Date: 2014-05-25

Abstract

Abstract

To solve the no convergence problem due to grid distortion when simulating hypervelocity impact problems using continuum-based discrete element method (CDEM), a 2D particle contact-based meshfree method (PCMM) is presented.In PCMM, triangle elements are created based on complex and abundant contact information between particles.According to the evolution and renewal of contact pairs, old elements (satisfying the deletion condition) will be deleted and new elements (satisfying the creation condition) will be created.By introducing fluid-elastic-plastic model for elements, the hypervelocity impact problems could be simulated well.Three conditions to create triangle element are given: the three particles which the element consisted of should contact with each other; each internal angle of the triangle element should locate between 30 and 150 degree; each edge length of the element should be larger than 0.5 times of average radius.The results of numerical cases (elastic bar impacting rigid wall, Taylor bar, debris clouds, and bullet penetration) show the accuracy and rationality of PCMM.
- mechanics of explosion,
- meshfree method,
- particle contact,
- hypervelocity impact,
- CDEM,
- fluid-elastic-plastic model,
- debris clouds

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References(19)

References

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