Stiffness Prediction of Rubber Spring at Lower Temperature
DING Zhiping1，MU Longhai1， PU Jiling2，HUANG Youjian2， ZENG Jiaxin1
Author information+
1. School of Mechanical Engineering，Hunan University of Technology，Zhuzhou Hunan 412007，China；
2. Zhuzhou Time New Material Technology Co., Ltd.，Zhuzhou Hunan 412007，China
Uniaxial tensile tests were conducted on rubber at 20℃, 0℃, -10℃, -20℃, -30℃ and -40℃ and the law of secant modulus of the rubber material’s constitutive curve with temperature variation was studied under different strain levels. The temperature factor is defined by the ratio of secant modulus of rubber specimen’s stress-strain curve at low temperature and that at room temperature. It is expressed as a polynomial function and the temperature factors under different strain levels were obtained by fitting rubber specimen tensile test data. The conical spring stiffness at room temperature was simulated and then modified by the temperature factors to predict the stiffness of cone-shape spring at low temperature. The stiffness bench tests of products at room temperature and low temperature were carried out, and results showed that the predicted stiffness was within 8% in meeting the project requirements when the ambient temperature higher than-20 ℃, but when the ambient temperature was lower than-30 ℃ predicted stiffness errors.
DING Zhiping1，MU Longhai1， PU Jiling2，HUANG Youjian2， ZENG Jiaxin1.
Stiffness Prediction of Rubber Spring at Lower Temperature[J]. Journal of Vibration and Shock, 2017, 36(14): 66-70
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