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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。
In order to study the mechanical behavior of the adaptive base under pressure expansion, an accurate modeling method based on meso-mechanics of fiber cords / rubber composites was proposed. The method is based on the exact value of the parameters of the cord and rubber materials. The rubber material is described by the Mooney-Rivilin constitutive model. The tensile test verifies the accuracy of the constitutive model. Based on the beam cord pull Tensile test rules have been revised cord tensile modulus. Through the above method, the numerical simulation and experimental research on the process of compression and expansion of the adaptable rubber base were carried out. The results show that this accurate modeling method can simulate the compression and expansion characteristics of the base, and obtain the stress and strain distribution of the cord and the rubber material in the base as well as the variation of the two. The research work has provided the technical support for the further research and practical application of the adaptive base.