On-Line Measurement of Material Properties for Composite Wing Structures

• Main Authors: Shao-Huan Cheng, 程紹桓
• Other Authors: Chyanbin Hwu
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/74461142395457189182

碩士 === 國立成功大學 === 航空太空工程學系碩博士班 === 92 === 　　Generally, load-carrying members of structures will encounter degeneration of material properties in changing service environments. To improve the safety of structure, it is necessary to examine material properties of structures in non-destructive way. In this thesis, we employ the concept of inverse analysis. The detectors of the inverse problems are the natural frequencies and static strains. The information about the relations between detectors and material properties can be obtained by analytical solution (Hwu and Gai,2003) and commercial finite element software ANSYS. Based on these data, we can train artificial neural networks to determine elastic properties of composite wing structures with sensors embedded into structures. To prevent accidents we hope the safety of wing structures can be realized by changes of material properties.