CAJ | 학술논문

为了分析微孔聚氨酯弹性材料的力学性能，分别对微孔聚氨酯弹性材料式样进行了拉伸和压缩试验；再利用拉伸与压缩试验数据对常见的经典超弹本构模型进行拟合，得出了相应的本构模型参数；通过误差分析对各种本构模型在不同应变条件下的适用性进行了分析探讨；最后，用拟合出的本构参数对高铁轨道用WJ-8扣件的微孔聚氨酯弹性垫板的静刚度进行数值模拟，有限元仿真结果与产品试验结果进行对比，说明了Yeoh模型、Van der Waals模型和Ogden N=3模型的预测值与试验值的相对误差分别为8.44%，7.83%和5.93%，Ogden N=3模型相对于其他模型具有更高的预测精度。
위료분석미공취안지탄성재료적역학성능，분별대미공취안지탄성재료식양진행료랍신화압축시험；재이용랍신여압축시험수거대상견적경전초탄본구모형진행의합，득출료상응적본구모형삼수；통과오차분석대각충본구모형재불동응변조건하적괄용성진행료분석탐토；최후，용의합출적본구삼수대고철궤도용WJ-8구건적미공취안지탄성점판적정강도진행수치모의，유한원방진결과여산품시험결과진행대비，설명료Yeoh모형、Van der Waals모형화Ogden N=3모형적예측치여시험치적상대오차분별위8.44%，7.83%화5.93%，Ogden N=3모형상대우기타모형구유경고적예측정도。
In order to analyze the mechanical properties of microcellular polyurethane elastic materials, the tensile and compression experiments were carried out. The experimental data was used to fit the classic hyperelastic constitutive models, and the parameters of the constitutive models were obtained . Through the error analysis, the applicability of constitutive models was discussed under different strain conditions. The fitted constitutive parameters were applied to simulate the static stiffness of WJ-8 fastner polyurethane elastic pad used for high speed railway, and the finite elemental simulation results were compared with the product test results, it showed that the relative errors between the tested values and the predicted values of Yeoh model, Van der Waals model and Ogden N=3 model were 8.44%,7.83%and 5.93%respectively, and the Ogden N=3 model had higher prediction accuracy than other models.