Deformation measurement across crack using two-step extended digital image correlation method
Deformation measurement across crack using two-step extended digital image correlation method
复制标题
使用两步扩展数字图像相关法测量裂纹变形
DOI：
10.1016/j.optlaseng.2009.12.017
复制
发表时间：
2010-11
影响因子：
4.6
通讯作者：
Zhan, Nan
中科院分区：
文献类型：
--
作者：
Zhang, Xiaochuan;Chen, Jinlong;Hu, Xiaoyan;Zhan, Nan
本文将单位分割法作为扩展有限元法，提出了两步扩展数字图像相关法（X-DIC），用于直接测量具有不连续性的全场位移。将数字图像相关（DIC）方法的相关因子中的位移变量用扩展的有限元位移模式表示，从而将X-FEM的基本原理与DIC方法相结合，形成了两步X-DIC方法。第一步测量目标区域的近似位移，第二步使用Newton-Raphson方法进行迭代过程以逼近目标区域中所有点的具体位移值。通过刚体平移试验和单轴拉伸试验验证了两步X-DIC方法的可靠性。结果表明，该方法具有较好的精度。将该方法应用于单轴拉伸试验和三点弯曲试验中跨裂纹位移场的测量，结果表明，该方法具有测量和分析某些不连续区域变形场的潜力。
In this paper, two-step extended digital image correlation (X-DIC) is proposed to directly measure full-field displacement with discontinuities by using the partition of unity method as the extended finite element method (X-FEM). The displacement variable in the correlation factor of the digital image correlation (DIC) method was expressed by the extended finite element displacement mode; in this way, the two-step X-DIC method combined the basic principle of X-FEM with the DIC method. The approximate displacement of the target area was measured in the first step, and the Newton–Raphson method was used to perform an iterative process to approach the specific displacement values of all the points in the target area in the second step. The reliability of the two-step X-DIC method was verified by the rigid body translation test and the uniaxial tensile test. The results show that this method has better accuracy. This method was also applied to measure the cross-crack displacement field in the uniaxial tensile test and the three-point bending test, and the experimental results indicate that this method has potential as a tool to measure and analyze the deformation field in some discontinuous regions.
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DOI：
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发表时间：
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期刊：
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影响因子：
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作者：
通讯作者：
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影响因子：
2.4
作者：
Lu, H;Cary, PD
通讯作者：
Cary, PD
影响因子：
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作者：
Chang Hai-ping;Huang Taiping
通讯作者：
Chang Hai-ping;Huang Taiping
影响因子：
2.4
作者：
Pan, Bing;Xie, Hui-min;Dai, Fu-long
通讯作者：
Dai, Fu-long
影响因子：
4.6
作者：
Jinlong Chen;Ganming Xia;Ke Zhou;Guisuo Xia;Yuwen Qin
通讯作者：
Jinlong Chen;Ganming Xia;Ke Zhou;Guisuo Xia;Yuwen Qin