Deng Jianjiao, Wang Zunming, Qiu Yi, Zheng Xu, Pan Zuofeng, Zhao Jingbao, Ma Yuting, Li Yabao, Liu Chi
State Key Laboratory of Advanced Vehicle Integration and Control, China FAW Group Co., Ltd., Changchun 130011, China.
Department of Energy Engineering, Zhejiang University, Hangzhou 310027, China.
Materials (Basel). 2025 Jul 28;18(15):3526. doi: 10.3390/ma18153526.
Polyurethane foam is widely used as a primary filling material in car seats. While it provides good damping and energy absorption, the mechanical properties are complex but play a vital role in vibration attenuation and vehicle ride comfort. This study proposes a comprehensive experimental and analytical method to characterize the visco-hyperelastic properties of seat-grade polyurethane foam. Quasi-static and dynamic compression tests were conducted on foam blocks to obtain load-deflection curves and dynamic stiffness. A visco-hyperelastic material model was developed, where the hyperelastic response was derived via the hereditary integral and difference-stress method, and viscoelastic behavior was captured using a Prony series fitted to dynamic stiffness data. The model was validated using finite element simulations, showing good agreement with experimental results in both static and dynamic conditions. The proposed method enables accurate characterization of the visco-hyperelastic material properties of seat-grade polyurethane foam.
聚氨酯泡沫被广泛用作汽车座椅的主要填充材料。虽然它具有良好的阻尼和能量吸收性能，但其力学性能较为复杂，但在振动衰减和车辆乘坐舒适性方面起着至关重要的作用。本研究提出了一种综合的实验和分析方法来表征座椅级聚氨酯泡沫的粘超弹性特性。对泡沫块进行了准静态和动态压缩试验，以获得载荷-挠度曲线和动态刚度。建立了一种粘超弹性材料模型，其中超弹性响应通过遗传积分和差应力法导出，粘弹性行为通过拟合动态刚度数据的 Prony 级数来捕捉。该模型通过有限元模拟进行了验证，在静态和动态条件下均与实验结果显示出良好的一致性。所提出的方法能够准确地表征座椅级聚氨酯泡沫的粘超弹性材料特性。
