A method to predict fatigue performances of a rubber isolator based on the cracking energy density and the fatigue crack growth characteristic of rubber material
WANG Xiao-li1,2，SHANGGUAN Wen-bin2，ZENG Xiang-kun1，DUAN Xiao-cheng2,3，YAN Jiao4
1. School of Automotive Engineering, Guangdong Polytechnic Normal University，Guangzhou 510665,China；
2. School of Mechanical and Automotive Engineering，South China University of Technology，Guangzhou 510640,China；
3. Ningbo Tuopu Group Co., Ltd.，Ningbo 315800,China；
4. Pan Asia Technical Automotive Center Co., Ltd.，Shanghai 201201,China
Abstract：A proposed method for predicting rubber isolators' fatigue performances including fatigue life, failure location and crack orientation is free from the traditional fatigue destruction experiment. Cracking energy density and fatigue crack growth characteristic of the studied rubber material are used in the proposed method. A typical type of rubber isolator is taken as the application subject so as to validate the proposed formula. The comparisons of the calculated and the measured results (fatigue life, failure location and crack orientation) reveal that an acceptable consistence is met. Especially, the predicted fatigue life falls within a factor of 1/2 of the experimental life, which is accepted in engineering. The proposed method for predicting fatigue performances, which needs fatigue crack growth experiment instead of the traditional fatigue experiment that costs a lot of rubber materials, would give a direct guideline for fatigue-proof design of rubber isolators.
王小莉1,2，上官文斌2，曾祥坤1，段小成2,3，阎 礁4. 基于开裂能密度及裂纹扩展特性的橡胶隔振器疲劳特性预测[J]. 振动与冲击, 2016, 35(6): 70-74.
WANG Xiao-li1,2，SHANGGUAN Wen-bin2，ZENG Xiang-kun1，DUAN Xiao-cheng2,3，YAN Jiao4. A method to predict fatigue performances of a rubber isolator based on the cracking energy density and the fatigue crack growth characteristic of rubber material. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(6): 70-74.
[1] 王小莉,上官文斌,刘泰凯,等. 填充橡胶材料单轴拉伸疲劳试验及疲劳寿命模型研究[J]. 机械工程学报,2013,49(14)：65-73.
WANG Xiao-li,SHANGGUAN Wen-bin，LIU Tai-kai,et al. Experiment of uniaxial tension fatigue and modeling of fatigue life for filled natural rubbers [J]. Journal of Mechanical Engineering,2013,49(14)：65-73.
[2] Mars W V, Fatemi A. A literature survey on fatigue analysis approaches for rubber [J]. International Journal of Fatigue,2002,24：949- 961.
[3] Kim W D,Lee H J,Kim J Y,et al. Fatigue life estimation of an engine rubber mount [J]. International Journal of Fatigue,2004,26：553- 560.
[4] Luo R K，Mortel W J,Wu X P. Fatigue failure investigation on anti-vibration springs [J]. Engineering Failure Analysis,2009,16：1366- 1378.
[5] 丁智平,陈吉平,宋传江,等. 橡胶弹性减振元件疲劳裂纹扩展寿命分析[J]. 机械工程学报,2010,46(22)：58-64.
DING Zhi-ping，CHEN Ji-ping，SONG Chuan-jiang，et al. Analysis of fatigue crack growth life for rubber vibration damper [J]. Journal of Mechanical Engineering,2010,46(22)：58-64.
[6] Asare S, Busfield J J C. Fatigue life prediction of bonded rubber components at elevated temperature [J]. Plastics, Rubber and Composites,2011,40(4)：194-200.
[7] Le Cam J B, Huneau B, Verron E. Description of fatigue damage in carbon black filled natural rubber [J]. Fatigue & Fracture of Engineering Materials & Structures, 2008, 31: 1031-1038.
[8] Le Cam J B, Huneau B, Verron E. Fatigue damage in carbon black filled natural rubber under uni- and multiaxial loading conditions [J]. International Journal of Fatigue,2013,52：82-94.
[9] Mars W V. Cracking energy density as a predictor of fatigue life under multiaxial conditions [J]. Rubber Chemistry and Technology，2002,75(1)：1-17.
[10] At-Bachir M，Mars W V, Verron E. Energy release rate of small cracks in hyperelastic materials [J]. International Journal of Non-Linear Mechanics,2012,47：22-29.
[11] Gent A N，Lindley P B, Thomas A G. Cut growth and fatigue of rubbers. I. the relationship between cut growth and fatigue [J]. Journal of Applied Polymer Science,1964,8：455-466.
[12] 王小莉. 橡胶隔振器多轴疲劳寿命预测方法研究[D]. 广州：华南理工大学,2014.
[13] Lake G J,Lindley P B. The mechanical fatigue limit for rubber [J]. Journal of Applied Polymer Science, 1965, 9:1233-1251.
