In order to characterize the mechanical behaviors of rubber track with large deformation, nonlinearity and anisotropy in different operational conditions, a constitutive model for rubber-cord composites with interaction between rubber and cord is developed. The total strain energy is decomposed into three parts, representing the strain energy from rubber, cord, and interaction between rubber and cord. Based on the particle swarm optimization and Newton iteration method, an optimization algorithm for model parameters fitting is proposed. With the obtained parameters, the mechanical behaviors of rubber-cord composites are predicted by the developed model, and the prediction results have a good agreement with test data. The proposed model is validated by comparing finite element simulation results with uniaxial tension data of rubber-cord composites. The maximum error is about 10.86 %. Moreover, the influences of cord off-axis angle on the mechanical properties of rubber-cord composite are analyzed. The proposed model can be used for finite element analysis, and lays the foundation for finite element simulation of rubber tracks.

为了表征在不同工作条件下大变形，非线性和各向异性的橡胶履带的力学行为，建立了橡胶-帘线在橡胶和帘线之间相互作用的本构模型。总应变能被分解为三个部分，分别代表来自橡胶，帘线以及橡胶与帘线之间相互作用的应变能。基于粒子群算法和牛顿迭代法，提出了一种模型参数拟合的优化算法。利用所获得的参数，通过建立的模型对橡胶帘线复合材料的力学行为进行了预测，预测结果与试验数据吻合良好。通过将有限元模拟结果与橡胶帘线复合材料的单轴拉伸数据进行比较，验证了该模型的有效性。最大误差约为10.86％。此外，分析了帘线偏轴角对橡胶帘线复合材料力学性能的影响。该模型可用于有限元分析，为橡胶履带有限元仿真奠定基础。