准确表征橡胶基复合材料在高温环境下的动态力学性能是有效开展起落架轮胎着陆过程数值仿真和结构安全性评估的关键，但传统SHPB测试方法无法有效测量低阻抗材料动态力学性能参数。本项目拟发展适用于低阻抗材料的动态力学测试实验方法及系统，研究内容主要包括：1）发展基于惯性效应测量的低阻抗材料各向异性非线性本构参数的识别方法；2）发展基于多应变率结构试样的材料力学行为应变率效应的分析方法；3）研制基于全场变形测量的低阻抗材料高温环境下动态力学性能测试的实验系统。利用项目提出的实验方法，对单个试样进行冲击测试，测量其惯性效应即可反演出多个应变率下的材料非线性动态力学性能，配合温度环境，可系统研究材料力学行为的应变率效应和温度效应。项目的研究成果将为低阻抗材料动态力学性能测试提供新的实验方法，同时也为飞机起落架轮胎结构的仿真建模提供必要的力学模型及基础参数。

Accurately identifying dynamic mechanical properties of rubber-based composite materials in high-temperature environment is the basis of dynamic numerical simulations and structural safety assessments for aircraft landing-gear tire. However, traditional SHPB cannot effectively characterize dynamic mechanical properties of low-impedance materials. The present project is working on developing a novel methodology and related experimental system suitable for high strain rate testing of low-impedance materials. The main works of this project contain three aspects as follows: 1) to develop methodology for identifying anisotropic non-linear constitutive parameters of low-impedance materials, making use of inertial effects. 2) To develop methodology for analyzing strain rate dependence from impact tests of low-impedance specimens with multi-strain-rate structures. 3) To build up experimental system suitable for high-temperature impact tests of low-impedance materials. Using the proposed experimental methodology, it is possible to characterize mechanical properties of low-impedance material at different strain rates from single inertial impact test. Together with a temperature environment box, it enables to systematically investigate temperature and strain rate dependence of low-impedance materials. The progress and achievement of this project will develop a novel experimental methodology for high strain rate testing of low-impedance materials, and will provide the required constitutive equations and basic material properties for numerical simulation of aircraft landing-gear-tire structure as well.