一种基于帘线/橡胶复合材料细观力学的精确建模方法

为研究适应性底座的受压膨胀力学特性,提出了一种基于纤维帘线/橡胶复合材料细观力学的精确建模方法.该方法建立在帘线与橡胶材料参数的准确取值这一基础上,其中橡胶材料采用Mooney-Rivilin本构模型进行描述,通过拉伸试验验证了本构模型的准确性,基于束帘线拉伸试验规律对帘线拉伸模量进行了修正.通过上述方法,对适应性橡胶底座受压膨胀过程进行了数值模拟与试验研究.结果表明:这一精确建模方法能够较好地模拟底座的受压膨胀特性,能够获取底座中帘线与橡胶材料的应力、应变的分布以及二者的变化规律.研究工作为适应性底座的进一步研究和实际应用提供了技术支撑.

An accurate modeling method based on cord/rubber composite material micromechanics

To study the compression expansion mechanical characteristic of adaptive base, an accurate modeling method based on fiber cord/rubber composite material micromechanics was proposed. The method was based on the precise estimation for material parameters of cord and rubber. The Mooney-Rivilin constitutive model was used to discribe rubber material, and correctness of constitutive model was verified by tension tests. Amending of cord tension modulus was based on bundle cord tension test rule. Based on the methods above, numerical simulation and experimental study of adaptive base compression expansion process were conducted. Results show that the accurate modeling method can simulate the compression expansion characteristics of base effectively. The distributions of stress and strain of cord and rubber materials in base, and their variation laws can be obtained. The study can provide technical support for further research and actual application of adaptive base.