| 有限元计算应力模拟实验光弹性等差条纹图 |
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| 引用本文： | 何玉明,古斌.有限元计算应力模拟实验光弹性等差条纹图[J].华中科技大学学报(自然科学版),1997(2). |
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| 作者姓名： | 何玉明 古斌 |
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| 作者单位： | He Yuming Assoc. Prof.; Dept. of Mech.，HUST，Wuhan 430074，China. Gu Bin |
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| 摘 要： | 提出用有限元计算应力模拟光弹性等差条纹图像的方法，介绍了由计算应力计算图像显示点应力的算法．通过主应力差与光弹性等差条纹的关系获得了模拟条纹图．模拟条纹图的灰度值可由数字图像卡快速全场显示，实现了计算应力的光弹性应力等差条纹图的模拟．所提出的新思路为计算结果与实验结果进行全场定量比较提供了新的途径
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| 关 键 词： | 有限元方法 光弹性等差条纹图 实验模拟 |
An Experimental Photoelastic Isochromatic Fringe Pattern Simulated with Stresses Calculated by FEM |
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| He Yuming Assoc. Prof., Dept. of Mech.,HUST,Wuhan ,China. Gu Bin.An Experimental Photoelastic Isochromatic Fringe Pattern Simulated with Stresses Calculated by FEM[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,1997(2). |
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| Authors: | He Yuming Assoc Prof Dept of Mech HUST Wuhan China Gu Bin |
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| Institution: | He Yuming Assoc. Prof., Dept. of Mech.,HUST,Wuhan 430074,China. Gu Bin |
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| Abstract: | A method for simulating the experimental isochromatic fringe pattern with stresses calculated with FEM is proposed. An algorithm for calculating the stresses of every displayed pixel is described. Simulated fringe patterns are obtained with the relationship between the difference of the principal stresses and the photoelastic isochromatic fringe pattern. The grey values of these patterns can be quickly displayed in full field on a monitor with a digital image card. The simulation of photoelastic isochromatic fringe patterns with calculated stresses is successfully carried out. The new idea proposed opens up a new way for the quantitative comparison of digital calculation results with experimental ones. |
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| Keywords: | finite element method (FEM) photoelastic isochromatic fringe pattern experimental simulation |
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