• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Nanoindentation Study of Polydimethylsiloxane Elastic Modulus Using Berkovich and Flat Punch Tips
【24h】

Nanoindentation Study of Polydimethylsiloxane Elastic Modulus Using Berkovich and Flat Punch Tips

机译：用Berkovich和平冲头对聚二甲基硅氧烷弹性模量进行纳米压痕研究

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

This article explores polydimethylsiloxane (PDMS) mechanical properties, and presents nanoindentation experiments with Berkovich and flat punch indenters. In the Berkovich tip quasi-static nanoindentation test, there are pull-in and pull-off events observed during the initial tip contact, and when withdrawing from the surface, respectively. The pull-in interaction needs to be accounted for to properly determine the initial contact point, and thus the accurate contact area. Once accounted for the pull-in event, the Berkovich and flat punch tips quasi-static nanoindentation tests give comparable results of about 1.5 MPa for the PDMS elastic modulus (5 : 1 elastomer base to the curing agent ratio). However, PDMS unloading stiffness is higher than the loading stiffness, and dynamic PDMS testing yields higher elastic modulus of about 3.6 MPa. While these results are comparable with the large strain macroscopic compression test results, the difference underscores the complexity of elastomer mechanical characterization and illustrates the discrepancies typical of the reported values. This article describes nanoindentation methods and critical aspects of interpreting results to assess PDMS mechanical properties. (c) 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41384.
机译：本文探讨了聚二甲基硅氧烷（PDMS）的机械性能，并提出了使用Berkovich和平冲头进行纳米压痕实验。在Berkovich尖端准静态纳米压痕测试中，在初始尖端接触期间以及从表面退出时分别观察到拉入和拉出事件。需要考虑引入互动，以正确确定初始接触点，从而确定准确的接触面积。一旦考虑了拉入事件，Berkovich和扁平冲头的准静态纳米压痕测试就可得出PDMS弹性模量（弹性体基础与固化剂的比例为5：1）的约1.5 MPa的可比结果。但是，PDMS的卸载刚度高于加载的刚度，动态PDMS测试得出的弹性模量更高，约为3.6 MPa。尽管这些结果与大应变宏观压缩试验结果相当，但差异突出了弹性体机械表征的复杂性，并说明了报告值的典型差异。本文介绍了纳米压痕方法和解释结果的关键方面，以评估PDMS的机械性能。 （c）2014 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，41384。

著录项

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