CAJ | 학술논문

基于炭纤维增强树脂基复合材料(CFRP)随机孔隙模型,提出采用时域有限差分法对CFRP孔隙率超声衰减检测进行数值模拟.针对孔隙率P=0.065%～4.96%,厚度2mm,纤维质量分数69%±3%的多层预浸料热压成型炭纤维单向增强环氧树脂基复合板,进行了数值模拟与实验测试.所得到的CFRP孔隙率与超声衰减系数间关系,在模拟与实验中展现了相似的规律.结果表明:利用随机孔隙模型结合时域有限差分法进行CFRP孔隙率超声检测数值模拟具有可行性.
기우탄섬유증강수지기복합재료(CFRP)수궤공극모형,제출채용시역유한차분법대CFRP공극솔초성쇠감검측진행수치모의.침대공극솔P=0.065%～4.96%,후도2mm,섬유질량분수69%±3%적다층예침료열압성형탄섬유단향증강배양수지기복합판,진행료수치모의여실험측시.소득도적CFRP공극솔여초성쇠감계수간관계,재모의여실험중전현료상사적규률.결과표명:이용수궤공극모형결합시역유한차분법진행CFRP공극솔초성검측수치모의구유가행성.
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.