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二维材料力学行为的压痕测试

周立新 曹国鑫

周立新, 曹国鑫. 二维材料力学行为的压痕测试[J]. 力学进展, 2018, 48(1): 1804. doi: 10.6052/1000-0992-16-043
引用本文: 周立新, 曹国鑫. 二维材料力学行为的压痕测试[J]. 力学进展, 2018, 48(1): 1804. doi: 10.6052/1000-0992-16-043
ZHOU Lixin, CAO Guoxin. Indentation tests investigation of mechanical behavior of two-dimensional materials[J]. Advances in Mechanics, 2018, 48(1): 1804. doi: 10.6052/1000-0992-16-043
Citation: ZHOU Lixin, CAO Guoxin. Indentation tests investigation of mechanical behavior of two-dimensional materials[J]. Advances in Mechanics, 2018, 48(1): 1804. doi: 10.6052/1000-0992-16-043

二维材料力学行为的压痕测试

doi: 10.6052/1000-0992-16-043
基金项目: 科学技术部基金资助项目(2015GB113000和2013CB933702)
详细信息
    作者简介:

    null

    作者简介:
    曹国鑫, 同济大学航空航天与力学学院教授.2010---2017北京大学工学院力学与工程科学系特聘研究员, 2004年在美国克莱姆森大学材料与工程专业获得博士学位, 2005---2008年在美国哥伦比亚大学土木与力学专业从事博士后工作, 2008---2010年在美国内布拉斯加--林肯大学从事研究助理教授.主要研究领域: 微纳米力学、物理力学和复杂材料力学行为多尺度计算模拟等. 在PRL. Nano Letters. JACS. JMPS, Carbon等期刊发表SCI论文80余篇, 论文被引用2500余次, H引用因子为30.

    通讯作者:

    曹国鑫

  • 中图分类号: O341;

Indentation tests investigation of mechanical behavior of two-dimensional materials

More Information
    Author Bio:

    ɛ E-mail:Caogx@pku.edu.cn

    Corresponding author: CAO Guoxin
  • 摘要: 准确了解二维材料的力学性能对于推动其应用具有重要意义, 无基底压痕技术是目前最广泛采用的二维材料力学性能测试方法之一, 本文综述了二维材料压痕研究的最新进展以及所面临的问题, 并对将来的研究工作进行了展望.无基底压痕技术是将二维材料转移到带有沟槽或柱形孔的基底上, 制备二维材料"梁"和"鼓"模型, 然后利用原子力显微镜测量其在压针作用下的载荷--位移关系, 最后通过基于连续介质薄膜导出的压痕响应分析模型拟合实验结果, 估算出二维材料的弹性模量和本征强度.由于二维材料的厚度远小于连续介质薄膜, 来自于压头以及基底孔侧壁的范德华力对二维材料的压痕响应具有显著影响, 造成二维材料与传统压痕分析模型中的基本假设不符, 导致不能准确预测二维材料的弹性模量; 另外, 由于传统压痕模型无法准确描述二维材料在大变形下的非线性行为, 以及由缺陷等引起的应力集中, 导致由压痕测试表征的二维材料(特别是多晶二维材料)本征强度具有较大的偏差. 因此, 一方面需要正确了解由压痕技术获得的二维材料力学性能, 另一方面还需对目前的研究方法做进一步的改进和完善.

     

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  • 收稿日期:  2016-11-24
  • 刊出日期:  2018-02-08

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