陈军

个人信息Personal Information

副教授

硕士生导师

性别:男

出生日期:1965-06-03

毕业院校:大连理工大学

学位:博士

所在单位:材料科学与工程学院

学科:材料无损检测与评价

办公地点:大连理工大学材料馆230房间

联系方式:0411-84707117

电子邮箱:chenjun@dlut.edu.cn

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基于数值计算方法的CFRP层板二维细观形貌多孔隙超声散射衰减

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发表时间:2014-01-01

发表刊物:复合材料学报

期号:3

页面范围:692-698

ISSN号:1000-3851

摘要:When ultrasonic propagates in porous composites, the interaction between ultrasonic scattering waves near voids and the scattering attenuation mechanism have not been clarified. Aiming at these problems, utilizing the finite difference time domain method, the ultrasonic propagation in carbon fiber reinforced plastic(CFRP) with the porosity of 7.47% was numerically calculated. The ultrasonic scattering attenuation coefficients of both 2D real morphology voids and spherical voids with different size ranges in CFRP laminates were studied contrastively. The results show that, for the small voids with the horizontal size m≤�?8 and the median voids with λ/8s of the spherical voids is generally less than that of real morphology voids. When the horizontal size of voids is m<2λ/3, the large size voids and slender voids could enhance ultrasonic scattering attenuation on the whole.

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