Failure criterion and durability characteristics of metal rubber under static compression load
-
摘要: 金属橡胶(MR)材料由于其出色的阻尼性能广泛应用在各种减振、隔振、抗冲击结构系统中,掌握其失效判据和准确预测其耐久性是关系到整个系统能否安全可靠工作的重要问题。针对MR构件在静载荷持续作用下的失效判据和耐久性展开了试验研究。结果表明:从结构尺寸变化量和力学性能蜕变量2个方面定义MR的失效判定参数合理可行,通过确定阈值可判定MR是否失效并给定耐久寿命。随保载时间的增加,MR的失效评定参数(结构尺寸变化量和力学性能蜕变量)呈现明显的阶段性变化,能分别反映MR材料内部微观结构及受力状态随持续静载荷的变化。在本试验中,无论保载载荷大小,MR结构在总试验时间未表现出结构尺寸失效。而MR保载载荷的增大会显著削弱其力学性能耐久寿命,导致割线模量蜕变量过大,MR构件表现出力学性能的明显失效。Abstract: Metal rubber(MR) is widely applied in vibration control, vibration isolation and shock resistance areas because of its characteristics of elasticity, damping, reliability and adaptation to the operational environment. It is critical for the system safety to accurately define the failure criterion and forecast the failure of MR in engineering. The failure criterion and durability property of MR under long-term static compression load were studied through the experimental method. The result shows that it is feasible to determine the MR failure by the structure deforming factor and mechanical property decaying factor, besides, the failure status and durability life can be determined by confirming the thresholds of these factors. The failure criterion factors of MR shows multi-stage property varying with loading time,denoting the change of MR inner micro structure and forced state with continuous loading time. In the test result of this paper, the metal rubber specimens exhibit no deforming failure under different static load status. However, under larger static load condition, the durability life of MR can be greatly decreased, resulting in excessively large tangent modulus decaying factor and obvious failure of MR mechanical properties.
-
Key words:
- metal rubber (MR) /
- static load /
- functional failure /
- failure criterion /
- durability
-
[1] 马艳红.新型自适应挤压油膜阻尼器理论与试验研究[D].北京:北京航空航天大学,2005:9-11. MA Y H.Theoretical and experimental investigation of an new-style adaptive squeeze film damper[D].Beijing:Beihang University,2005:9-11(in Chinese). [2] ANDRES L S,CHIRATHADAM T A.Metal mesh foil bearing:Effect of motion amplitude,rotor speed,static load,and excitation frequency on force coefficients[J].Journal of Engineering for Gas Turbines and Power,2011,133(12):122503. [3] MA Y H,SCARPA F,ZHANG D Y,et al.A nonlinear auxetic structural vibration damper with metal rubber particles[J].Smart Materials and Structures,2013,22(8):084012. [4] MA Y H,ZHANG Q C,ZHANG D Y,et al.A novel smart rotor support with shape memory alloy metal rubber for high temperatures and variable amplitude vibrations[J].Smart Materials and Structures,2014,23(12):125016. [5] 马艳红,李昊宇,李一峰,等.金属橡胶材料吸声特性试验与分析[J].北京航空航天大学学报,2009,35(5):604-607. MA Y H,LI H Y,LI Y F,et al.Experiment and analysis on sound absorption characteristics of metal rubber[J].Journal of Beijing University of Aeronautics and Astronautics,2009,35(5):604-607(in Chinese). [6] 朱彬,马艳红,张大义,等.金属橡胶迟滞特性本构模型研究[J].物理学报,2012,61(7):078101. ZHU B,MA Y H,ZHANG D Y,et al.A constitutive model of metal rubber based on hysteresis property[J].Acta Physica Sinica,2012,61(7):078101(in Chinese). [7] 李宇燕,黄协清.金属橡胶材料阻尼性能的影响参数[J].振动、测试与诊断,2009,29(1):23-26. LI Y Y,HUANG X Q.Influencing factors of damping characteristic for metal rubber[J].Journal of Vibration,Measurement & Diagnosis,2009,29(1):23-26(in Chinese). [8] ZHANG D Y,SCARPA F,MA Y H,et al.Compression mechanics of nickel-based superalloy metal rubber[J].Materials Science & Engineering A,2013,580(37):305-312. [9] 洪杰,朱彬,马艳红,等.金属橡胶颗粒静态特性试验[J].北京航空航天大学学报,2012,38(2):218-221. HONG J,ZHU B,MA Y H,et al.Experiments on static characteristics of metal rubber particles[J].Journal of Beijing University of Aeronautics and Astronautics,2012,38(2):218-221(in Chinese). [10] ZHANG D Y,SCARPA F,MA Y H,et al.Dynamic mechanical behavior of nickel-based superalloy metal rubber[J].Materials and Design,2014,56(4):69-77 [11] JIANG H Y,XIA Y H,AO H R,et al.Lifetime of metal rubber isolator with different vibration amplitudes[J].Journal of Cenral South University of Technology,2005,12(2):181-185. [12] 王尤颜,白鸿柏,侯军芳.金属橡胶材料疲劳损伤性能研究[J].机械工程学报,2011,47(2):65-71. WANG Y Y,BAI H B,HOU J F.Fatigue damage performance of metal rubber material[J].Journal of Mechanical Engineering,2011,47(2):65-71(in Chinese). [13] 陈亮.环形金属橡胶隔振器的寿命及其试验研究[D].哈尔滨:哈尔滨工业大学,2012:37-40. CHENG L.Fatigue life and experiment study on circular metal rubber vibration isolator[D].Harbin:Harbin Institute of Technology,2012:37-40(in Chinese). [14] 魏浩东.金属橡胶构件抗冲击性能的理论及实验研究[D].哈尔滨:哈尔滨工业大学,2007:8-19. WEI H D.Theoretical and experimental research on metal rubber element anti-shock performance[D].Harbin:Harbin Institute of Technology,2007:8-19(in Chinese). [15] 郭宝亭,朱梓根,崔荣繁.金属橡胶材料的理论模型研究[J].航空动力学报,2004,19(3):314-319. GUO B T,ZHU Z G,Cui R F.Theoretical model of metal-rubber[J].Journal of Aerospace Power,2004,19(3):314-319(in Chinese). [16] 朱彬,马艳红,洪杰.金属橡胶刚度阻尼模型理论分析[J].北京航空航天大学学报,2011,37(10):1298-1302. ZHU B,MA Y H,HONG J.Theoretical analysis on stiffness and damping characteristics of metal rubber[J].Journal of Beijing University of Aeronautics and Astronautics,2011,37(10):1298-1302(in Chinese). [17] 夏宇宏,姜洪源,敖宏瑞.簧丝走向对金属橡胶构件性能的影响分析[J].中国机械工程,2002,13(10):855-891. XIA Y H,JIANG H Y,AO H R.Research on the effect of wire distribution on the characteristics of metal rubber element[J].China Mechanical Engineering,2002,13(10):855-891(in Chinese).
点击查看大图
计量
- 文章访问数: 899
- HTML全文浏览量: 113
- PDF下载量: 614
- 被引次数: 0