A front tracking algorithm for hypervelocity impact problems with crack growth, large deformations and high strain rates

作者：Wu Shiyu; Chen Qianyi; Liu Kaixin^*; Luo Ning

来源：International Journal of Impact Engineering, 2014, 74: 145-156.

DOI：10.1016/j.ijimpeng.2014.04.010

• Front tracking
• CE/SE scheme
• High-velocity impact
• Spall fracture
• Plugging failure

In the present paper, a front tracking algorithm, which includes a front tracking part and a specified crack growth scheme, is proposed for tracking material interfaces and describing the formation and propagation of a crack. Combined with an improved space-time Conservation Element and Solution Element (CE/SE) scheme, the algorithm can simulate high-velocity impact problems with crack growth, large deformations and high strain rates. The present front tracking algorithm shows high accuracy in the numerical test of a single vortex problem. Numerical simulations are also presented for spall fractures in a plate when impacted by a spherical projectile and perforation of a cylindrical Arne tool steel projectile impacting a plate target. The numerical results are in good agreement with the corresponding experimental observations. It is demonstrated that the present algorithm is feasible and reliable for analyzing fractures.

• 出版日期2014-12
• 单位北京大学