Spall investigations for LY12 Al using triangular waves

作者：Yu Yuying; Chen Danian^*; Tan Hua; Wang Huanran; Xie Shugang; Zhang Maojiong

来源：International Journal of Impact Engineering, 2007, 34(3): 395-404.

DOI：10.1016/j.ijimpeng.2005.11.006

• LY12 Al
• plate impact
• spall experiment
• triangular wave
• numerical simulation

Spall of LY12 Al was investigated using experimental techniques based on the dynamics of shock wave attenuation to produce decaying triangular shock pulse in the sample of plate-impact spall tests. Spall signals were measured by monitoring the time-resolved free surface velocity histories of the targets with VISAR techniques. Targets were soft recovered and two spall planes for the high-stress triangular wave experiment were observed. For triangular wave spall plane location is a variable and there can be several regions of relatively high tension. The void coalescence-based spall model presented by the authors is used in simulating the spall tests. Computed free surface velocity histories of targets and damage distributions through the thickness of the targets are compared with the VISAR data and the observed damages in soft recovered targets, respectively. It is noted that the modeling of spall process caused by triangular waves can be seriously influenced by the artificial viscosity, the constitutive equations of the sample and the spall fracture model.

• 出版日期2007-3
• 单位中国工程物理研究院流体物理研究所; 中国工程物理研究院