Ultrasonic Testing Study for Autoclave Cured Composite Material Porosity
GUO Zhiwen1, SHI Xiaochun1, SHEN Yang2, TAO Minggao1, ZHOU Songwei1
(1. AVIC GA Huanan Aircraft Industry Co., Ltd., Zhuhai 519000, China;
2. School of Applied Science and Civil Engineering, Beijing Institute of Technology, Zhuhai 519088, China)
Abstract：AVIC General’s self-developed all-composite fuselage AG300 aircraft is a new kind of business jet based
on carbon fiber composite material, using the curing oven molding, which is high-efficiency than conventional autoclave
molding, but the porosity is bigger than that of the traditional process. The size and distribution of porosity directly affects
the mechanical properties of structure, particularly vital member with stress concentration, so the need is urgent for reliable
and accurate nondestructive evaluation of their porosity. We introduce a kind of preparation method for composite material
porosity block by spraying solvent, using the ultrasonic attenuation method and metallographic analysis to carry out the
calibration of the predecess or experical formula. We compare the porosities from calculated empirical formula and metallographic
analysis, and draw the fitting curve. The error is not more than 0.4%, which verifies application possibility of this
empirical formula in the engineering practice.
2017, 
