Scholarlink

<p>Interfacial defects can trigger structural failure of fiber reinforced polymer (FRP) repaired or strengthened steel structures, therefore, effective inspection technique is needed for such defects. This study proposes scanning eddy current thermography (ECT) as an efficient and rapid inspection method to detect FRP-steel interfacial defects. First, thirty-five FRP-steel specimens with different thicknesses of steel and geometric sizes of interfacial defects are tested under ECT. The results show that ECT is capable of detecting FRP-steel interfacial defects with a diameter larger than 6.5&#xa0;mm. Edge effects in the heating stage decrease the accurateness of ECT, therefore cooling stage is used in scanning ECT to improve the efficacy. Second, a multi-physical numerical simulation is conducted on FRP-steel specimens under ECT, in which the thermal response agrees well with experimental results. Parametric study demonstrates that the thickness of adhesive substantially influences the detection accuracy. The power of ECT, and the heat transfer coefficient between the specimen and the surroundings slightly influence the detection results. Finally, a self-developed scanning ECT system is used to detect FRP-steel interfacial defects at a speed of 3.3&#xa0;cm/s.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Scanning eddy current thermography for inspection of FRP-steel interfacial defects

  • 期刊论文

  • 发表日期：

    2026年8月4日

查看全文
  • Xingxing Zou,
  • Mengyao Li,
  • Hao Ma,
  • Jun Li

摘要

Interfacial defects can trigger structural failure of fiber reinforced polymer (FRP) repaired or strengthened steel structures, therefore, effective inspection technique is needed for such defects. This study proposes scanning eddy current thermography (ECT) as an efficient and rapid inspection method to detect FRP-steel interfacial defects. First, thirty-five FRP-steel specimens with different thicknesses of steel and geometric sizes of interfacial defects are tested under ECT. The results show that ECT is capable of detecting FRP-steel interfacial defects with a diameter larger than 6.5 mm. Edge effects in the heating stage decrease the accurateness of ECT, therefore cooling stage is used in scanning ECT to improve the efficacy. Second, a multi-physical numerical simulation is conducted on FRP-steel specimens under ECT, in which the thermal response agrees well with experimental results. Parametric study demonstrates that the thickness of adhesive substantially influences the detection accuracy. The power of ECT, and the heat transfer coefficient between the specimen and the surroundings slightly influence the detection results. Finally, a self-developed scanning ECT system is used to detect FRP-steel interfacial defects at a speed of 3.3 cm/s.