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基于SPM与DIC技术的应变场测量改进方法

柏文琦 向德 王柠莎

【引用本文】 柏文琦,向德,王柠莎. 基于SPM与DIC技术的应变场测量改进方法[J]. 计量科学与技术,2021, 65(3):75-79, 8 doi: 10.3969/j.issn.2096-9015.2021.03.16
引用本文: 【引用本文】 柏文琦,向德,王柠莎. 基于SPM与DIC技术的应变场测量改进方法[J]. 计量科学与技术,2021, 65(3):75-79, 8 doi: 10.3969/j.issn.2096-9015.2021.03.16
BAI Wenqi, XIANG De, WANG Ningsha. Improved Strain Field Measurement Based on SPM and DIC[J]. Metrology Science and Technology, 2021, 65(3): 75-79, 8. doi: 10.3969/j.issn.2096-9015.2021.03.16
Citation: BAI Wenqi, XIANG De, WANG Ningsha. Improved Strain Field Measurement Based on SPM and DIC[J]. Metrology Science and Technology, 2021, 65(3): 75-79, 8. doi: 10.3969/j.issn.2096-9015.2021.03.16

基于SPM与DIC技术的应变场测量改进方法

doi: 10.3969/j.issn.2096-9015.2021.03.16
基金项目: 湖南省科技创新计划资助(2018XK2008)
详细信息
    作者简介:

    柏文琦(1980-),湖南省计量检测研究院高级工程师,研究方向:计量测试技术、故障监测分析,邮箱:baiwenqi2@qq.com

Improved Strain Field Measurement Based on SPM and DIC

  • 摘要: 微纳米尺度下的应力/应变测量方法是实验力学研究的重要方向之一。现有的许多研究忽略了待测试件表面的散斑图质量、系统随机误差、计算流程等因素对最终的应变场测量精度的影响。围绕基于扫描探针显微镜的数据图像相关技术实现过程,提出科学的评估准则、优化位移场计算方法。实验结果表明,所提出的应变场计算方法在精度控制方面的性能得到显著提升。
  • 图  1  基于SPM与DIC技术的应变场测量流程图

    Figure  1.  Flowchart of strain field measurement based on SPM and DIC

    图  2  根据式(10)得到的散斑图

    Figure  2.  Speckle image obtained by Eq. (10)

    图  3  根据式(11)得到的散斑图

    Figure  3.  Speckle image obtained by Eq. (11)

    图  4  R=5时根据式(10)得到的散斑灰度三维分布图

    Figure  4.  Distribution of grayscale values of the speckle image obtained by Eq. (10) when R=5

    图  5  R=5时根据式(11)得到的散斑灰度三维分布图

    Figure  5.  Distribution of grayscale values of the speckle image obtained by Eq. (11) when R=5

    表  1  散斑图平均灰度梯度对比

    Table  1.   Average grayscale gradient of speckle images

    选取函数R=1R=3R=5
    式(10)1.861.861.88
    式(11)0.060.380.75
    下载: 导出CSV

    表  2  位移场估计误差

    Table  2.   Estimation error of the displacement field

    变形程度36912
    散斑区域尺寸485.9%6.5%7.2%3.8%
    644.7%6.2%5.4%3.4%
    1281.1%1.3%1.2%1.3%
    下载: 导出CSV
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出版历程
  • 网络出版日期:  2021-04-13
  • 刊出日期:  2021-03-12

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