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Structural Characteristics of Membranes & Shells and Applications to Non-Destructive Inspection using 3D Measurement and Holographic Interferometry

膜的结构特征

基本信息

批准号：
14350246
负责人：
MATSUDA Hiroshi
金额：
$ 7.87万
依托单位：
Nagasaki University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14350246/
关键词：
three dimensional measurement horographic interferometry electronic speckle pattern interferometry membrane structures plates & shells free vibration analysis FE analysis non-destructive inspection 三次元形状計測

项目摘要

This study focused on structural characteristics of shell & membrane structures using three dimensional measurement, holographic interferometer and electronic speckle pattern interferometer(ESPI), and its applications to non-destructive inspection. The obtained results can be summarized as follows.(a)The vibration characteristics of FRP laminated composite plates have been analytically and experimentally investigated. The resonance vibration modes are obtained by using holographic interferometer. The vibration frequencies and modes between analytical and experimental results were good agreement. Non-destructive inspection of defective FRP plate is future theme.(b)In tensile test of defective aluminum plates, ESPI has been applied. Localization and development of strain have been able to visualize. The future theme is to simulate by FE analysis and fracture mechanics technique.(c)ESPI has been applied to observe a wrinkling generation process of tensile test of the rectangular tensioned … More membrane structures. It is found from the experimental results that wrinkling occurs at an inflection point of the load-minimum principal strain. Furthermore, using 3D-optic measuring device, the wrinkle of membrane has been measured three-dimensionally. The future theme is to develop high accuracy measurement equipment and to simulate by theoretical analysis.(d)In a biaxial compression test using PMMA samples exposed acetone evaporation, a macroscopic shear-faulting was preceded by an appearance of array of minute cracks or crazes. It was found from the fracture mechanics based numerical analysis that there exist a special arrangement in which each of crack constitutes the array can open exhibiting mode-I deformation even under biaxial compression.(e)ESPI has been applied to observe a shrinkage strain between concrete hardening process and the generation and development of bending and shearing cracking in RC beams, and it was possible to visualize. The future theme is to simulate by theoretical analysis such as FE,SPH,and DEM Less

本文主要研究了壳膜结构的三维测量、全息干涉和电子散斑干涉（ESPI）技术及其在无损检测中的应用。所获得的结果可以总结如下。（a）对FRP复合材料层合板的振动特性进行了理论分析和实验研究。利用全息干涉仪获得了共振模态。振动频率和振型的分析结果与实验结果吻合较好。缺陷FRP板的无损检测是未来的主题。(b)In缺陷铝板拉伸试验，电子散斑干涉已被应用。菌株的定位和发展已经能够可视化。今后的研究方向是采用有限元分析和断裂力学技术进行模拟。（c）应用电子散斑技术观察了矩形拉伸试样拉伸试验中裂纹的产生过程 ...更多信息膜结构实验结果表明，在载荷-最小主应变的拐点处，出现了塑性变形。此外，利用三维光学测量装置，对膜的褶皱进行了三维测量。今后的研究方向是开发高精度的测量设备和理论分析模拟。(d)In使用PMMA样品的双轴压缩试验暴露于丙酮蒸发，宏观剪切断裂之前出现微小裂纹或银纹的阵列。基于断裂力学的数值分析发现，存在一种特殊的排列，其中构成阵列的每个裂纹即使在双轴压缩下也可以打开，表现出I型变形。（e）利用电子散斑干涉技术观察了混凝土硬化过程与钢筋混凝土梁的弯曲和剪切裂缝的产生和发展之间的收缩应变，并且可以可视化。今后的研究方向是通过有限元、SPH、DEM等理论分析进行模拟