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首页> 外文会议>Asia-Pacific Symposium on Engineering Plasticity and Its Applications pt.2 >New Experimental Technique for Material Instability Study
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New Experimental Technique for Material Instability Study

机译：材料不稳定研究的新实验技术

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The paper presents a new method applied to measure displacement fields using probability concept. Based on analysis of digital image sequences, we propose the formulation derived from the information of probability between subsets in the un-deformed image and deformed image. The quantity of this information between two subsets establishes a criterion of their mutual dependence based on the maximum a posteriori (MAP) estimate between them. So the subset in deformed image that maximizes the quantity is the corresponding subset of that in un-deformed image. After get the corresponding subset, we can obtain the integer pixel displacement. And we can get accurate displacement field using sub-pixel technique. In the experiments, the method is validated and the resulting solution can show accuracy to 0.02 pixels. This method was also applied successfully to determine the displacement fields of laminated composites under uniaxial compression. The elastic-plastic mechanical behavior and instability of the composites is studied.
机译：本文介绍了使用概率概念测量位移场的新方法。基于对数字图像序列的分析，我们提出了从未变形图像和变形图像中的子集之间的概率信息导出的制剂。两个子集之间的该信息的数量基于它们之间的最大后验（MAP）估计来建立其相互依赖性的标准。因此，变形图像中的子集最大化数量是在未变形图像中的相应子集。获取相应子集后，我们可以获得整数像素位移。我们可以使用子像素技术获得准确的位移场。在实验中，验证该方法，得到的溶液可以显示为0.02像素的精度。该方法也成功应用以确定单轴压缩下叠层复合材料的位移场。研究了复合材料的弹性塑料力学行为和不稳定性。

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