The Crashworthiness Analysis of Composite and Metal Light Aircraft

• Main Authors: Kuan-Jung Chen, 陳冠融
• Other Authors: Pu-Woei Chen
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/35372375595305159037

碩士 === 淡江大學 === 航空太空工程學系碩士班 === 100 === In recent years, the advantages of composite materials make that the composite materials take the place of the metal materials for aerospace industry. Because the flight accidents cannot be avoided completely, so it’s an important issue to investigate crashworthiness of composite aircraft structure under the tendency of composite aircraft. In recent years, the mostly researching objects of composite aircraft crashworthiness are the large aircrafts. To face of the composite light aircraft market will increased, that also means that crashworthiness of the composite light aircraft also emphasize its importance. In this study we use Pro/ENGINEER to establish STOL CH 701 model, the metal material is Al 6061-T6, and composite material is Std CF Fabric Composite. The boundary conditions are 1.3 landing velocity followed by ASTM F2245-07 4.4.4.1, and 30degree impact angle defined by AGATE. The result of dynamic simulation must be under the 15% cockpit reducing rate defined by MIL-STD-1290A. The process of dynamic simulation is meshing model by finite element software Hypermesh, then output the simulation data by LS-DYNA. The result of this study was informed that the safety impact speed of metal material cockpit is 9.59 m/s while crashed for 30 degree impact angle, but composite cockpit can afford the speed greater than defined by ASTM. The safety impact angle of metal cockpit is 16.56 degree, composite cockpit is 84.9 degree. By the relation of impact speed and impact angle to cockpit reducing rate, the safety crash zone of composite cockpit is 160% higher than metal cockpit. Above these results, light aircraft has the batter crashworthiness to replace metal material by composite material.