Scholarlink

Abstract <p>The growing demand for carbon fiber reinforced polymer (CFRP) pipes in industry and their susceptibility to impact damage have led to great focus on damage detection in these structures. This paper proposes a method for detecting impact damage in CFRP pipes using low-power ultrasonic thermography with sweep excitation. The bottom of ultrasonic transducer was designed into a curved surface to improve its coupling to the composite pipes. In accordance with the attributes of local defect resonance (LDR), the frequency band was ascertained by analyzing the displacement spectrum at the site of impact damage. The LDR frequencies were further validated from the thermal responses of ultrasonic thermography inspection and finite element analysis of the specimen eigenfrequencies. Finally, the method was used to detect various impact damage on CFRP pipes. Since the LDR frequency at the defect is covered by the frequency range of the narrowband sweep excitation, impact damages can be efficiently activated, resulting in an obvious temperature rise.</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

Experimental Investigation on Impact Damage Detection in CFRP Pipes using Low-power Ultrasonic Thermography with Sweep Excitation

  • 期刊论文

  • 发表日期：

    2025年4月1日

查看全文
  • Mengchuan Hu,
  • Qin Wei,
  • Guangsan Song,
  • Caizheng Wu,
  • Shaoping Deng,
  • Zeyi Wei,
  • Lijun Zhuo

摘要

Abstract

The growing demand for carbon fiber reinforced polymer (CFRP) pipes in industry and their susceptibility to impact damage have led to great focus on damage detection in these structures. This paper proposes a method for detecting impact damage in CFRP pipes using low-power ultrasonic thermography with sweep excitation. The bottom of ultrasonic transducer was designed into a curved surface to improve its coupling to the composite pipes. In accordance with the attributes of local defect resonance (LDR), the frequency band was ascertained by analyzing the displacement spectrum at the site of impact damage. The LDR frequencies were further validated from the thermal responses of ultrasonic thermography inspection and finite element analysis of the specimen eigenfrequencies. Finally, the method was used to detect various impact damage on CFRP pipes. Since the LDR frequency at the defect is covered by the frequency range of the narrowband sweep excitation, impact damages can be efficiently activated, resulting in an obvious temperature rise.