缺口膨胀环实验的设计分析与数值模拟

Design analysis of expanding gap-ring test for studying evolvement of damage

1.
National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, Sichuan, China

摘要: 提出并设计了用于研究材料在冲击拉伸加载下损伤演化过程的缺口膨胀环实验。通过数值模拟研究了缺口膨胀环的拉伸加载历程。研究表明,缺口膨胀环各位置经历拉伸加载时间的长度由其与缺口之间的距离决定，但加载时间长度不能简单按Mott卸载波的传播时间来估计，需要借助膨胀环各位置的速度历史来确定。
- 固体力学 /
- 冲击拉伸 /
- 缺口膨胀环 /
- 卸载波
Abstract: The expanding gap-ring test was put forward and designed for studying the evolvement of damage in material under impact tensile. The impact tensile process of an expanding gap ring was studied by numerical simulation. The length of loading time for different positions in the gap ring is relative to the distances of these positions from the gap. However, the length of time cant be calculated by Mott-wave transmitting, but can be determined by the velocity histories of nodes in different positions of the gap ring.
- solid mechanics /
- impact tensile /
- expanding gap ring /
- relief wave