BOLTED LAP JOINT MONITORING USING ULTRASONIC GUIDED WAVES CONSIDERING TEMPERATURE VARIATIONS

被引：0

作者：

Peng, Xuezhi ^{[1
]}

Shen, Yanfeng ^{[1
,2
]}

机构：

[1] Shanghai Jiao Tong Univ, Univ Michigan Shanghai Jiao Tong Univ Joint Inst, Shanghai, Peoples R China

[2] Shanghai Key Lab Digital Maintenance Bldg & Infra, Shanghai, Peoples R China

来源：

PROCEEDINGS OF ASME 2022 INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION, IMECE2022, VOL 1 | 2022年

基金：

中国国家自然科学基金;

关键词：

bolt loosening; temperature compensation; nonlinear ultrasonics; structural health monitoring; nondestructive evaluation; guided waves; CONTACT; PROPAGATION; TORQUE; DAMAGE;

D O I：

暂无

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This paper presents the numerical investigation of ultrasonic guided waves for bolted lap joint Structural Health Monitoring (SHM), considering temperature variations. It first systematically discusses the mechanisms behind the linear and nonlinear ultrasonic techniques for bolt loosening detection. Afterwards, a general Finite Element Model (FEM) of a bolted structure was established to observe and verify the influence of the change of bolt pre-tightening force on the linear and nonlinear characteristics of ultrasonic guided waves. In order to further study the effect of temperature variation on the sensing signals, the structure is subjected to various levels of thermal loads. This study examines the temperature influence on both linear and nonlinear signal features, such as the transmitted wave energy and the nonlinearity of waveforms. Simulation results show that an increment in temperature can cause partial detachment of the interface between two lap joint components in the structure, resulting in a decrease in both the linear energy and the degree of nonlinear higher-order harmonics. The paper finishes with concluding remarks and suggestions for future work.

引用

页数：8

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