This paper is concerned with numerical simulation utilizing LS-DYNA MAT54 for axial crush of glass-fiber mat/PA6 composite tubes. The crush simulation aims at reproducing the crush energy absorption capability measured from dynamic drop tests. The adopted MAT54 has a merit as a widely commercialized model of composite materials to simulate a progressive failure mode. Parameters of MAT54 are calibrated to reduce difference of the crush energy absorption capability between experiment and simulation on the basis of parametric studies. The calibration is performed for major parameters considering effect of energy absorption and stability of crush simulation first, and other parameters are determined by a trial and error method. In order to evaluate the calibrated parameters of MAT54, results are compared for specific energy absorption and crush depths measured from simulation and experiment. Consequently, the presented simulation shows good agreements with experiments, and its applicability is verified under various impact speed and impactor mass conditions.

本文涉及使用 LS-DYNA MAT54 进行玻璃纤维毡/PA6 复合管轴向挤压的数值模拟。挤压模拟旨在再现从动态跌落测试中测得的挤压能量吸收能力。所采用的 MAT54 作为复合材料的广泛商业化模型具有优势，可模拟渐进式失效模式。在参数研究的基础上，对MAT54的参数进行了校准，以减少实验和模拟之间压碎能量吸收能力的差异。对主要参数进行标定，首先考虑能量吸收和破碎模拟稳定性的影响，其他参数通过试错法确定。为了评估 MAT54 的校准参数，将模拟和实验测量的特定能量吸收和挤压深度的结果进行比较。因此，所提出的模拟与实验显示出良好的一致性，并且在各种冲击速度和冲击器质量条件下验证了其适用性。