...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Science >Characterization of Bi-axial fatigue resistance of polymer plates
【24h】

Characterization of Bi-axial fatigue resistance of polymer plates

机译：聚合物板的双轴抗疲劳特性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

An approach is proposed to characterize bi-axial fatigue resistance of polymer plates. The method proposed here can detect a change of mechanical properties of polymers (especially ductility) due to fatigue loading, before any visible crack is generated. A decrease in ductility by fatigue loading has been reported for polymers subjected to uni-axial fatigue stresses. Whether a similar phenomenon occurs under bi-axial fatigue stresses is not known at present. In this study, a new bi-axial testing device was designed and built that is capable of applying equal bi-axial forces to cruciform specimens in a cyclic mode. This paper details the test method, including design and instrumentation of the bi-axial testing device, specimen design, and the procedure to determine the load for a desired bi-axial stress state. Poly(acrylonitrile-butadiene-styrene) (ABS) was used as the sample material. Preliminary results reported here show that the ABS’s ductility can be reduced significantly by applying 500 cycles of bi-axial fatigue stress at a level that is about 50% of its tensile strength. The results also indicate that such a level of bi-axial fatigue stress has induced extensive rubber particle cavitation, though it is yet to clarify whether the particle cavitation has led to the ductility drop. The study concludes that the methodology proposed in this paper can be used to evaluate bi-axial fatigue resistance of polymer plates for the purpose of materials evaluation.
机译：提出了一种表征聚合物板双轴疲劳强度的方法。本文提出的方法可以在产生任何可见裂纹之前检测由于疲劳载荷引起的聚合物机械性能的变化（尤其是延展性）。据报道，承受单轴疲劳应力的聚合物会因疲劳载荷而导致延展性降低。目前尚不清楚在双轴疲劳应力下是否会发生类似现象。在这项研究中，设计并制造了一种新的双轴测试设备，该设备能够以循环模式向十字形试样施加相等的双轴力。本文详细介绍了测试方法，包括双轴测试设备的设计和仪器，样品设计以及确定所需双轴应力状态的载荷的过程。聚（丙烯腈-丁二烯-苯乙烯）（ABS）被用作样品材料。此处报告的初步结果表明，通过施加500次双轴疲劳应力（其拉伸强度的50％左右），可以显着降低ABS的延展性。该结果还表明，这种水平的双轴疲劳应力引起了广泛的橡胶颗粒气穴现象，尽管尚不清楚该颗粒气穴现象是否导致延展性下降。研究得出结论，本文提出的方法可用于评估聚合物板的双轴抗疲劳性，以进行材料评估。

著录项

  • 来源
    《Journal of Materials Science》 |2005年第4期|965-972|共8页
  • 作者

    H. J. Kwon; P.-Y. B. Jar; Z. Xia;

  • 作者单位

    Department of Mechanical Engineering University of Alberta;

    Department of Mechanical Engineering University of Alberta;

    Department of Mechanical Engineering University of Alberta;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号