發展新方法應用於複合材料非破壞檢測

本研究應用乘積調變法(Modulate)，針對複合材料表面裂痕進行非破壞檢驗，複合材料採用玻璃纖維疊層板，而表面裂痕由雷射切割產生。首先將複合材料系統等效為懸臂樑，並可等效成單自由度質量、阻尼及彈簧系統，接著採用新發展積調變之傅立葉係數法，觀察傅利葉系數之直流位準與二倍頻位準，並且計算出能量消耗，之後可將結構能量消耗作為複合板損傷的評估指標。再利用功率消耗原理求阻尼ｃ，接著藉由品質因子計算出系統之等效彈簧常數及等效質量。利用等效彈簧常數與等效質量，即可對複合材料結構的損壞做分析與探討，進而找出複合材料損壞的指標與趨勢。

關鍵字

複合材料；乘積調變；玻璃纖維疊層板；能量消耗；功率消耗

並列摘要

In this study, the application for modulate, to detection composite surface cracks for non-destructive testing,. of the glass fiber composite laminate. The surface cracks produced by laser cutting.First, the composite materials system will be equivalent to a cantilever beam and may be equivalent to a one degree of freedom for mass. Then to adopt of new product development modulation Fourier coefficients method. Observed fourier coefficients of the α0 and α 2, And calculated the dissiipated energy of the structure, After the structure of dissiipated energy can be as a composite plate injury evaluation. The Principle reuse damping power dissipated, Then the quality factor calculated by the equivalent spring constant of the system and the equivalent quality. Equivalent spring constant and effective use of quality, you can damage the composite structure for analysis and discussion, and then find out the damaged composite indicators and trends.

並列關鍵字

Compsite Materials ； Modulate ； Glass Fiber Lamanite, Dissipative energy ； power dissipated

國際替代計量

發展新方法應用於複合材料非破壞檢測

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