Anisotropy in carbon fiber reinforced polymer (CFRP) and its effect on induction thermography

被引：28
作者：
Guo, Jianguang [1 ]
Gao, Xiaorong [1 ]
Toma, Ewald [2 ]
Netzelmann, Udo [2 ]
机构：
[1] Southwest Jiaotong Univ, Nondestruct Testing Res Ctr, Sch Phys Sci & Technol, Chengdu, Sichuan, Peoples R China
[2] Fraunhofer Inst Nondestruct Testing IZFP, Campus E3 1, Saarbrucken, Germany
来源：
NDT & E INTERNATIONAL | 2017年 / 91卷
关键词：
Induction thermography; CFRP; Anisotropy; Fiber damage; Simulation; THERMOPLASTIC COMPOSITES;
D O I：
10.1016/j.ndteint.2017.05.004
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Lock-in induction thermography was carried out on uniaxial, biaxial, and multi-ply woven carbon fiber reinforced polymers (CFRPs) at an induction frequency of approximately 300 kHz and at modulation frequencies of 0.4-36 Hz to detect defects in them. The measurements were performed in reflection and transmission modes. In the uniaxial material, heating occurred far away from the excitation coil. Lines of minimal heating were observed. The modulation frequency dependence of the amplitude showed an inverse proportionality, indicating volume heating. The multi-ply woven CFRP plates with impacts of 3 and 5 J showed distinct contrast because of cracked fibers. The results were compared with those obtained using optically excited thermography and X-ray tomography.
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页码：1 / 8
页数：8
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