非金属材料外罩对双层药型罩形成射流影响的研究

Study on the Jet Flow Formation of Non-metallic Outer Casing on Double-layer Coating

为了研究外罩为高分子聚合物材料对双层药型罩射流成型的影响,运用应力波传播理论对应力波在双层药型罩中的传播原理进行了理论分析,运用非线性动力学仿真软件Autodyn-2D进行数值仿真。研究得到:高分子聚合物材料作为外罩时,射流的性能均优于铝作为外罩时的性能,其中聚苯乙烯优于尼龙、橡胶和聚四氟乙烯,性能达到最好;对比内外罩厚度之比发现,外罩与内罩比为2∶1时射流的综合性能最好;双层药型罩比单层药型罩的性能有较大提高。

In order to study the influence of the polymer as outer liner on the jet formation of the double-layered liner,the stress wave propagation theory was used to analyze the principle of stress wave propagation in the double-layer liner.Numerical simulation was performed using the nonlinear dynamics simulation software Autodyn-2D.The result shows:When using the polymer material as the liner,the performance of the jet is better than that of the aluminum.Among them,polystyrene is superior to nylon,rubber and PTFE.And the best ratio of the thickness of the inner liner and the outer liner is 2∶1.And the double-layered liner has a greater performance than the single-layer liner.