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推导了双弹簧、双活塞黏弹性力学模型的本构方程.在CETR UMT-2型试验机及LKDM-2000轮廓摩擦磨损仪上考察了尼龙PA66、聚四氟乙烯、聚甲基丙烯酸甲酯、聚甲醛和聚醚型聚氨酯等材料的静态蠕变特性、松弛特性.分别利用标准线性固体模型和新型本构模型对实验材料的蠕变、松弛特性进行了表征.实验事实及理论计算结果表明,相对于标准线性固体模型而言,该力学模型能更好地反映聚合物材料的蠕变、松弛等黏弹性质.
The constitutive equations of double-spring and double-piston viscoelasticity model were deduced.The influences of nylon PA66, polytetrafluoroethylene (PTFE), polymethylmethacrylate (PMMA) Polyoxymethylene and polyether polyurethanes, etc. The creep and relaxation properties of the materials were characterized by using a standard linear solid model and a new constitutive model respectively.Experimental results and theoretical calculations show that, Compared with the standard linear solid model, the mechanical model can better reflect the viscoelastic properties such as creep and relaxation of polymer materials.