周期性铜线密排结构的冲击压缩特性研究

Study on the Compression Properties of Periodic Copper Wire Closed-Packed Structure

对铜线密排结构材料开展了一维平面应变冲击压缩实验与数值模拟研究。利用激光位移干涉仪测量了样品/窗口界面速度剖面,获取了有效的结构冲击压缩实验数据。从样品界面速度曲线可以推断,密排结构冲击压缩时没有形成致密结构,在卸载过程中发生了分层。应用光滑粒子流体动力学方法(SPH)建立了平面铜线密排结构的三维计算模型,计算得到样品冲击加载下的压缩特性,实验和数值模拟得到的界面速度和压力结果吻合较好,为后续开展柱面铜线密排结构的冲击压缩过程研究奠定了基础。

A kind of copper wire closed-packed structure was compressed by one-dimensional strain impacting and the dynamic process was numerically simulated. The laser displacement interferometer was used to measure the interface particle velocity profile and the effective experimental data of structure impact compression were obtained. It can be inferred from the interface velocity curve that no compact structure was formed in the sample during the shock compressing progress,and the delamination of sample happened during the unloading progress. The three-dimensional numerical model of plane copper wire closed-packed structure was built by using smoothed particle hydrodynamics （SPH） method,and the shock compression properties of sample were obtained. The interface particle velocities and pressure of the sample were in good agreement between experiments and simulations.