动力总成橡胶悬置高温疲劳特性的预测与试验研究

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摘要选硬度为45度以及50度的天然填充橡胶(N45及N50)为研究对象，在常温(23℃)、60℃和90℃的环境中,对哑铃形橡胶试片进行单轴拉伸疲劳试验。以工程应变峰值ε为损伤参量，根据哑铃形试片的疲劳试验结果，建立了橡胶材料在三种不同温度环境下的疲劳寿命预测模型。分析了不同温度、高温软化、橡胶材料的硬度对橡胶疲劳寿命的影响。对一动力总成橡胶悬置进行了高温疲劳试验，利用建立的橡胶材料的疲劳寿命模型对其疲劳特性进行了预测，预测得到的寿命与实测寿命的相对误差小于10%，说明本文建立的填充天然橡胶高温疲劳寿命预测模型，可以用于高温环境下工作的橡胶悬置疲劳寿命的预测。

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	上官文斌1
	2 李明敏1 段小成1
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关键词 ：填充天然橡胶材料, 高温疲劳寿命, 疲劳试验, 寿命预测模型, 试验验证

Abstract：A uniaxial tension fatigue test was carried out on a filled natural rubber specimens of two hardness(shore 45 and shore 50)under the temperature of 23℃,60℃ and 90℃. Based on the experimental data, fatigue life prediction models was established by using maximum Engineering strain as the damage parameters. The influence of different temperature, high temperature softening and hardness on the fatigue life of rubbers is investigated. A powertrain rubber mount was tested under 90℃ to obtain the fatigue life. A finite element model is established and the fatigue life of the rubber mount is estimated using the damage parameter calculated from the finite element model. The calculated fatigue life is compared with the measured, and the relative error is less than 10%. It is shown that the proposed fatigue life prediction models and the measurement method can be used to estimate the fatigue life of rubber mount under high temperature.

Key words： Filled natural rubber materials High temperature fatigue life Fatigue test Fatigue life prediction model Test verification

收稿日期: 2014-09-26 出版日期: 2015-08-15

引用本文:

上官文斌1, 2 李明敏1 段小成1, 2. 动力总成橡胶悬置高温疲劳特性的预测与试验研究[J]. 振动与冲击, 2015, 34(15): 66-71.
SHANGGUAN Wenbin1,2 LI Mingmin1 DUAN Xiaocheng1,2. A research on experiment and fatigue life prediction of rubber mounts under high temperature. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(15): 66-71.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2015/V34/I15/66

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