热空气作用下FM-2D橡胶材料老化本构模型研究

目的 建立热空气作用下氟醚-2D(FM-2D)橡胶材料的老化本构模型，形成老化作用下橡胶材料力学响应分析方法，为准确评估橡胶密封件使用寿命提供依据。方法 探究热空气作用下FM-2D橡胶材料老化机理，基于连续介质有限变形理论框架，采用热力学耗散势函数法，引入橡胶老化过程的势能函数，据此建立考虑橡胶材料老化的超弹性本构模型，基于橡胶老化试验，完成本构模型参数标定，实现老化作用下橡胶力学响应的预测。结果 建立了热空气作用下橡胶材料的老化本构模型，依据老化试验数据标定模型参数，分析了热空气作用下橡胶材料本构模型的可靠性。结论 建立的热空气作用下橡胶材料的老化本构模型可准确预测橡胶随老化时间演变的力学响应，有效模拟了橡胶材料的老化过程。

Constitutive Modeling of FM-2D Rubber Materials Subject to Hot Air Aging

This study aims to establish a constitutive model for rubber materials undergoing hot air aging, emphasizing the development of a mechanical response analysis method applicable for assessing the service life of rubber seals. Employing the finite deformation theory within the framework of continuous mechanics, the method incorporates the thermodynamic dissipation potential function. The potential energy function representing the rubber aging process is introduced, leading to the formulation of a hyperelastic constitutive model that accounts for the effects of rubber material aging. To validate the model, rubber aging tests were conducted, and the model parameters were calibrated based on the experimental results. Application of the developed constitutive model to FM-2D rubber material demonstrated its efficacy in accurately predicting the evolution of mechanical responses under conditions of hot air aging. This model serves as a valuable tool for evaluating the durability of rubber seals and contributes to a more comprehensive understanding of the aging dynamics in rubber materials.