Simultaneous assessment of Lagrangian strain and temperature fields by improved IR-DIC strategy
Simultaneous assessment of Lagrangian strain and temperature fields by improved IR-DIC strategy
复制标题
通过改进的 IR-DIC 策略同时评估拉格朗日应变和温度场
DOI:
10.1016/j.optlaseng.2017.02.012
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发表时间:
2017-07
影响因子:
4.6
通讯作者:
C. Jiang
中科院分区:
文献类型:
--
作者:
X.G. Wang;C.H. Liu;C. Jiang
This paper focuses on the development of a novel digital image correlation strategy based on infrared imaging (IR-DIC) for realizing simultaneous assessment of Lagrangian strain and temperature fields. A major difficulty in the IR-DIC is the evolution of the thermal field during deformation that is unexpected in the image correlation. Two solutions are proposed to tackle this difficulty. The first solution is to utilize a high-pass filter to eliminate the variation part of the thermal signal, and the second solution is to employ an advanced metric, the mutual information, as the correlation criterion. Both methods are verified through a tensile test performed on a notched specimen. The estimated displacement and strain fields demonstrate well the desirable performance of the proposed methods. Thanks to the kinematic field assessment, the obtained thermal fields can be described in the Lagrangian coordinate system, thus the temperature evolution of the material points during deformation can be followed effectively.
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通讯作者:
S. Dumoulin;H. Louche;O. Hopperstad;T. Børvik
DOI:
--
发表时间:
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期刊:
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影响因子:
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通讯作者:
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