[논문]Fabrication of PVDF film sensors for fatigue damage monitoring of single-lap adhesive joints

Kim, Da Hye; Hwang, Hui Yun; Kim, Seong Su

doi:10.1016/j.compstruct.2018.09.069

[해외논문] Fabrication of PVDF film sensors for fatigue damage monitoring of single-lap adhesive joints

Composite structures, v.207, 2019년, pp.223 - 231

Kim, Da Hye (Department of Organic Materials and Fiber Engineering, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, Republic of Korea) , Hwang, Hui Yun (Department of Mechanical Design Engineering, Andong National Unversity, 1375, Gyeongdong-ro, Andong-si, Gyeongsangbuk-do, Republic of Korea) , Kim, Seong Su (Department of Mechanical Engineering, KAIST, 291, Daehak-ro, Yuseong-gu, Daejeon, Republic of Korea)

Abstract ▼ AI-Helper

Abstract Polyvinylidene fluoride (PVDF) has been widely used in piezoelectric applications because of its outstanding properties such as low permittivity, high thermal stability, high chemical resistance, and flexibility. In this study, PVDF film sensors were prepared for fatigue damage monitoring of single-lap adhesive joints. PVDF films were fabricated using the solvent casting method, and post treatment, including mechanical stretching and heat setting, was conducted to increase the β-phase crystallinity of the films. Subsequently, the PVDF films were polarized to align the molecular dipoles. The crystal structures of the PVDF films were investigated using X-ray diffraction (XRD) and the thermal behaviors were analyzed using differential scanning calorimetry (DSC). The piezoelectric constants of the prepared PVDF films were measured using a d33 meter. The sensing performance of the films for fatigue damage monitoring of single-lap adhesive joints was assessed by fatigue tests under various stress levels. In addition, a fatigue failure manual based on the PVDF sensor signal, which can predict the failure of the adhesive joints, was constructed.

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참고문헌 (20)

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[해외논문] Fabrication of PVDF film sensors for fatigue damage monitoring of single-lap adhesive joints

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[해외논문] Fabrication of PVDF film sensors for fatigue damage monitoring of single-lap adhesive joints

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