中国机械工程

• 机械基础工程 • 上一篇    下一篇

高温环境下编织-嵌槽型金属橡胶的疲劳特性分析

李拓1;白鸿柏1,2;薛新2;吴乙万2   

  1. 1.陆军工程大学石家庄校区车辆与电气工程系,石家庄,050003
    2.福州大学机械工程及自动化学院,福州,350116
  • 出版日期:2019-05-10 发布日期:2019-05-14
  • 基金资助:
    “十三五”武器装备预先研究项目(99502040604)

Fatigue Properties of Knitted\|dapped Metal Rubbers under High Temperature Environment

LI Tuo1;BAI Hongbai1,2;XUE Xin2;WU Yiwan2   

  1. 1.Department of Vehicle and Electrical Engineering of Shijiazhuang Campus, Army Engineering University, Shijiazhuang ,Hebei,050003
    2.School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou,350116
  • Online:2019-05-10 Published:2019-05-14

摘要: 采用拉-压式组合试验工装,以位移控制的加载方式对编织-嵌槽型金属橡胶进行了疲劳试验,研究了常温(25 ℃)及高温(300 ℃)环境下编织-嵌槽型金属橡胶在不同加载振幅下的疲劳特性,并通过平均刚度、等效黏性阻尼系数及其损伤因子对构件的损伤演化过程进行了表征。结果表明:编织-嵌槽型金属橡胶构件的疲劳损伤形式表现为磨损、断丝以及塑性变形;构件在各种试验条件下的疲劳过程均可分为刚度强化期和刚度衰减期,而构件力学性能的衰减主要发生在刚度衰减期;温度的升高或振幅的增大均会显著增大构件的积累损伤,进而缩短其使用寿命。

关键词: 编织-嵌槽型金属橡胶, 疲劳特性, 高温环境, 振幅

Abstract: Fatigue property tests of knitted-dapped metal rubbers were performed with tension compression type composite test installation under the control mode of displacement. The fatigue properties of knitted-dapped metal rubbers under different amplitudes in room temperature (25 ℃) and high temperature (300 ℃)were researched. The damage evolutional processes were analyzed with average stiffness, equivalent viscous damping coefficient, and their damage factors. The results indicate that the fatigue damage forms of knitted-dapped metal rubbers are as abrasion, fracture of wires and plastic deformations. The fatigue processes include stiffness strengthening processes and stiffness attenuation processes, while the attenuation of mechanical properties mainly happen in the later stages. The increase of amplitudes and the rise of temperatures, which will clearly increase the accumulated damages of the specimens, both may shorten operating lifes of the materials.

Key words: knitted-dapped metal rubber, fatigue property, high temperature environment, amplitude

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