Impact Damage Detection in CFRP Using Statistical Analysis of Resistance-Temperature Characteristics
Impact Damage Detection in CFRP Using Statistical Analysis of Resistance-Temperature Characteristics
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DOI：
10.1299/jmmp.5.33
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
Yoshiro Suzuki;A. Todoroki;Y. Mizutani;R. Matsuzaki
中科院分区：
文献类型：
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作者：
Yoshiro Suzuki;A. Todoroki;Y. Mizutani;R. Matsuzaki
提出了一种利用电阻变化检测碳纤维增强复合材料（CFRP）层合板分层裂纹的新方法。这是可能的，以检测分层裂纹，而不采样的数据从完整的结构，并防止错误的诊断，从电阻的变化所造成的损害，在电极的电接触。作为研究的结果，分层的直径至少5.3毫米的准静态负载所造成的准各向同性的层叠CFRP板是可检测的，而不采样的数据从完整的结构。然而，所提出的诊断方法尚未进行实验检测分层受到冲击载荷。虽然这是不幸的，有没有受到低速冲击和那些受到准静态载荷的FRP层压板的损坏之间的差异很大，在表面层中的断裂纤维和塑性变形，如伴随着分层凹痕可能取决于应变率。还需要确保即使在电极处发生电接触的冲击损坏时，诊断方法也提供正确的诊断。除穿透芯片外，芯片电极不影响诊断。本研究采用诊断方法的分层裂纹和损伤的电接触的电极受到落重冲击载荷和凹痕从准静态负载。
A new method for detecting delamination cracks in carbon fiber reinforced polymer (CFRP) laminates using changes in electrical resistance was developed in a previous study. It was possible to detect delamination cracks without sampling the data from intact structures and to prevent false diagnoses from changes in electrical resistance caused by damage to the electrical contacts at the electrodes. As a result of the study, delamination of at least 5.3 mm in diameter caused by a quasi-static load in a quasi-isotropic-plied CFRP plate was detectable without sampling the data from intact structures. However, the proposed diagnostic method has not yet been experimentally performed for detecting delaminations subjected to impact loads. Although it is unfortunate that there is not much difference between damage of FRP laminates subjected to low-speed impacts and those subjected to quasi-static loads, broken fibers in the surface layer and plastic deformation such as a dent accompanied by delamination might depend on the rate of strain. It is also necessary to ensure that the diagnostic method provides correct diagnoses even if impact damage of electrical contact occurs at the electrodes. The diagnosis was not affected by chipped electrodes except for through chips. The present study employs the diagnostic method for delamination cracks and damage to electrical contacts of an electrode subjected to falling weight impact loads and dents from quasi-static loads.