UHMWPE层合板抗侵彻性能的一种等效数值分析方法

Equivalent Numerical Simulation Method for Penetration Resistance of UHMWPE Laminate

为了提高超高分子量聚乙烯纤维(ultra high molecular weight polyethylene fiber,UHMWPE)层合板抗弹体侵彻数值分析的建模和计算效率,基于三维等效弹性常数理论,建立了UHMWPE层合板的等效力学模型,发展了一种适用于纤维复合材料层合板抗侵彻性能的三维等效数值分析方法。经UHMWPE层合板抗侵彻试验数据验证,该等效方法考虑了纤维铺层角度对层合板力学性能的影响,可以准确模拟预测层合板的阶段性侵彻破坏特征,对9.1~60.0 mm厚度范围内层合板弹道性能的平均预测误差小于10%。该方法与纤维尺度的细观数值模拟方法相比,无须对纤维束及基体单独建模;与片层尺度的准细观数值模拟方法相比,无须单独指定纤维/树脂片层铺层方向,且无须在片层间插入大量黏结层单元。

To enhance the modeling and computational efficiency of numerical simulations for penetration resistance in ultra⁃high molecular weight polyethylene fiber(UHMWPE)laminates,an equivalent mechanical model of UHMWPE laminates was established based on the theory of three⁃dimensional equivalent elastic constants,and a three⁃dimensional equivalent rapid simulation method suitable for predicting the penetration resistance of fiber composite laminates was developed.As verified by the UHMWPE laminates′penetration test data,the equivalent method can accurately simulate and predict the staged penetration characteristics of laminates by taking into account the influence of the fiber lay⁃up on the mechanical properties of the laminates,and the average errors for the ballistic performance of 9.1-60.0 mm laminates are less than 10%.The method bypasses the need for detailed modeling of fiber bundles and matrices,as required in mesoscopic scale numerical simulations,and eliminates the necessity of specifying individual fiber/resin ply orientations and inserting numerous bonding elements,as in quasi⁃mesoscopic scale simulations.