Applications of laser ultrasound NDT methods on composite structures in aerospace industry
Applications of laser ultrasound NDT methods on composite structures in aerospace industry
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激光超声无损检测方法在航空航天复合材料结构中的应用
DOI：
10.1117/12.814512
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
C. v. Kopylow
中科院分区：
文献类型：
--
作者：
M. Kalms;O. Focke;C. v. Kopylow
复合材料在飞机生产中的应用越来越广泛。主要的复合材料类型是碳纤维增强塑料（CFRP），玻璃纤维增强塑料（GFRP）和金属铝层压板（例如玻璃纤维铝增强眩光©）。CFRP材料制成的典型部件有襟翼、垂直和水平尾翼、中央翼箱、后压舱壁、肋和桁。这些复合材料部件需要足够的无损检测（NDT）方法。要检测的缺陷是分层和脱粘，孔隙和异物夹杂。单元件换能器人工超声检测仍然是中小型复合材料部件应用最多的检测方法。激光超声方法对传统超声技术进行无损检测的延伸，为生产过程带来了新的可能性，如复杂cfrp构件的检测和远程控制下的在线观察。本文介绍了激光超声无损检测的原理，特别是针对小型复杂CFRP和C/PPS零件的无损检测要求。我们报告了基于激光的超声选择与产生类型的导波和体波在现代飞机材料上的应用。
Composite materials are used more and more in aircraft production. Main composite types are Carbon Fiber Reinforced Plastics (CFRP), Glass Fiber Reinforced Plastics (GFRP) and metal-aluminium laminates (e. g. Glass Fiber Aluminium Reinforced GLARE©). Typical parts made of CFRP material are flaps, vertical and horizontal tail planes, center wing boxes, rear pressure bulkheads, ribs and stringers. These composite parts require adequate nondestructive testing (NDT) methods. Flaws to be detected are delaminations and debondings, porosity and foreign body inclusion. Manual ultrasonic testing with single element transducers is still the most applied method for composite parts with small and medium size. The extension of the conventional ultrasound technique for nondestructive testing with the laser ultrasound method brings new possibilities into the production processes for example the inspection of complex CFRP-components and the possibilities of online observation under remote control. In this paper we describe the principle of laser ultrasound with respect to the demands of nondestructive testing especially of small complex CFRP and C/PPS parts. We report applications of laser-based ultrasound options with generated types of guided and bulk waves on modern aircraft materials.