无氧铜层裂的实验与数值研究

利用一级气体炮对国产的无氧铜（OFHC）进行了平板撞击致层裂实验，3 mm厚的OFHC飞片撞击6 mm厚的OFHC靶，采用锰铜应力计记录试样/有机玻璃（PMMA）界面附近的应力历史，获得试样发生层裂的信息。软回收试样，观测回收试样的层裂片。采用基于空穴聚集的层裂模型，数值模拟这些平板撞击致层裂实验。数值模拟的应力剖面以及试样层裂片厚度与实验结果基本一致。此外，对于国外相关的OFHC层裂实验，采用基于空穴聚集的层裂模型也作了相应的数值模拟，并进行了比较。

Experimental and numerical studies on spall of OFHC

The planar spall experiments for OFHC were performed on the gas gun facility.6 mm thickness OFHC sample with PMMA buffer was mounted in a stationary target holder and impacted by 3 mm thickness OFHC flyer carried within the head of the projectile body.The stress history at the interface between the OFHC sample and PMMA was measured by using manganin gage and the OFHC sample was recovered for post-test evolution.A void coalescence-based spall model proposed by Chen et al was used to simulate these experiments numerically.The computed results were compared with the stress recorded by manganin gage and the observed spall plane in recovered samples.The planar spall experiments for OFHC performed by Curran et al were simulated numerically by using the void coalescence-based spall model.