Experimental research on damage tolerance and air tightness of typical composite panels

The extensive use of composites in aircraft leads to the problem of damage tolerance after low-speed impact. It is necessary to consider not only the change of mechanical properties but also the change of work properties such as air tightness. In this paper, the damage morphology and air tightness o...

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Veröffentlicht in:Journal of physics. Conference series 2023-03, Vol.2459 (1), p.12006
Hauptverfasser: Zou, Peng, Wang, Qingsong, Chen, Hao, Yang, Junchao, Li, YinSong
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creator Zou, Peng
Wang, Qingsong
Chen, Hao
Yang, Junchao
Li, YinSong
description The extensive use of composites in aircraft leads to the problem of damage tolerance after low-speed impact. It is necessary to consider not only the change of mechanical properties but also the change of work properties such as air tightness. In this paper, the damage morphology and air tightness of a typical composite stiffened panel subjected to low-speed impact were experimentally studied. The damage initiation and propagation and the change of air tightness after impact, static compression and compression fatigue were analyzed respectively. It is found from the test that after 120% ultimate load condition and 100,000 times constant amplitude fatigue load condition, the impact damage does not expand, and the air tightness is good and no obvious leakage is observed, indicating that the structural design meets the requirements of damage tolerance and air tightness.
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subjects Airtightness
Composite materials
Crack initiation
Damage tolerance
Fatigue tests
Fracture mechanics
Impact damage
Low speed
Materials fatigue
Mechanical properties
Physics
Structural design
Ultimate loads
title Experimental research on damage tolerance and air tightness of typical composite panels
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