空调塑料材料的碰撞失效模拟研究

研究空调内机塑料材料ABS-121H在跌落工况下的力学行为。通过准静态、动态拉伸力学实验和失效实验，分别建立了不同应变率下材料弹塑性模型及LS-DYNA软件的GISSMO失效模型，并通过整机零部件实验及仿真对材料弹塑性模型和失效模型准确性进行验证。结果表明:考虑应变率效应的材料弹塑性模型可以准确反映结构的加速度和刚度，GISSMO失效模型可以准确预测材料复杂应力状态下的断裂失效行为。该研究为空调跌落仿真的材料模型建立提供参考。

SIMULATION RESEARCH ON IMPACT FAILURE OF PLASTIC MATERIAL FOR AIR CONDITIONING

The mechanical behavior of a plastic material ABS-121H for air conditioner in drop conditions was studied. Based on quasi-static tensile tests, dynamic tensile tests and failure tests, the elastoplastic model of material under different strain rates and the GISSMO failure model of LS-DYNA software were established. In addition, the accuracy of elastoplastic model and failure model were verified by air conditioner components tests and simulations. The results indicate that the elastoplastic constitutive model of the material which considers the strain rate effect can accurately reflect the acceleration and stiffness of the structure. The GISSMO failure model can precisely predict the failure behavior of the material under complex stress state. This study provides a promising approach for the establishment of material models for air conditioner drop simulation.