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<p>The demand for advanced vibration isolation materials is increasing, driven by diverse and challenging operational environments that require superior damping characteristics and fatigue durability over a wide temperature range. This study investigates a novel multi-strand twisted wire-based metal rubber (MT-WMR), which is fabricated from multi-strand twisted wires, focusing on its dynamic mechanical behavior under varying densities, temperatures, and frequencies. The results demonstrate that MT-WMR exhibits a higher dynamic loss factor and superior damping performance compared to traditional metal rubber (MR). As the temperature increases from 25 to 250&#xa0;°C, the dynamic loss factor of MR samples decreases by 24.9%, whereas that of MT-WMR samples decreases by only 13.6%. This indicates the superior thermal stability of MT-WMR. Fatigue assessments reveal that with increasing vibration cycles, the average dynamic stiffness of the samples rises, while the loss factor gradually declines. Based on these findings, a cumulative fatigue damage model for MT-WMR was developed and validated through comparative tests. This model provides a foundation for designing MT-WMR and predicting the fatigue life within the temperature range of 25-250&#xa0;°C. Scanning electron microscopy microstructure analysis was conducted on the tested samples to clarify the fatigue damage propagation mechanism.</p>

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Dynamic Mechanical Properties and Fatigue Properties of Multi-strand Twisted Wire-Based Metal Rubber

  • 期刊论文

  • 发表日期：

    2025年11月14日

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  • Yiwan Wu,
  • Haojie Chen,
  • Yiquan Zeng,
  • Yu Tang,
  • Hongbai Bai

摘要

The demand for advanced vibration isolation materials is increasing, driven by diverse and challenging operational environments that require superior damping characteristics and fatigue durability over a wide temperature range. This study investigates a novel multi-strand twisted wire-based metal rubber (MT-WMR), which is fabricated from multi-strand twisted wires, focusing on its dynamic mechanical behavior under varying densities, temperatures, and frequencies. The results demonstrate that MT-WMR exhibits a higher dynamic loss factor and superior damping performance compared to traditional metal rubber (MR). As the temperature increases from 25 to 250 °C, the dynamic loss factor of MR samples decreases by 24.9%, whereas that of MT-WMR samples decreases by only 13.6%. This indicates the superior thermal stability of MT-WMR. Fatigue assessments reveal that with increasing vibration cycles, the average dynamic stiffness of the samples rises, while the loss factor gradually declines. Based on these findings, a cumulative fatigue damage model for MT-WMR was developed and validated through comparative tests. This model provides a foundation for designing MT-WMR and predicting the fatigue life within the temperature range of 25-250 °C. Scanning electron microscopy microstructure analysis was conducted on the tested samples to clarify the fatigue damage propagation mechanism.