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《Journal of Materials Engineering》 2010-01
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CFRP Random Pores Model and Numerical Simulation of Porosity Ultrasonic Testing

MU Yun-fei1,LIN Li1,GUO Guang-ping2,LI Xi-meng1(1 Non-Destructive Testing Laboratory of Dalian University of Technology,Dalian 116024,Liaoning,China;2 Beijing Institute of Aeronautical Materials,Beijing 100095,China)  
Based on carbon fiber reinforced plastics(CFRP)random pores model,finite difference time domain(FDTD) was proposed to simulate the inspection of CFRP porosity using ultrasonic attenuation method.Numerical simulation and experiment test were carried out.The specimen was multilayer,hot pressed prepreg,epoxy resin based,and one direction carbon fiber reinforced plastic.Its thickness was 2mm,and fiber mass fraction was 69%±3%.The porosities range from 0.065% to 4.96%.A similar law on the relation between CFRP porosity and ultrasonic attenuation coefficient was found from simulation and experiment.The result shows that CFRP porosity inspection can be simulated using the random pores model and FDTD method.
【CateGory Index】: V258;TB332
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