Frictional heating model for efficient use of vibrothermography

被引：59

作者：

Mabrouki, F. ^{[1
,2
]}

Thomas, M. ^{[2
]}

Genest, M. ^{[1
]}

Fahr, A. ^{[1
]}

机构：

[1] Natl Res Council Canada, Ottawa, ON K1A 0R6, Canada

[2] ETS, Dept Mech Engn, Montreal, PQ H3C 1K3, Canada

来源：

NDT & E INTERNATIONAL | 2009年 / 42卷 / 05期

关键词：

Closed crack detection; Vibrothermography; Finite element modeling; Frictional heating; LOCK-IN THERMOGRAPHY; NONDESTRUCTIVE EVALUATION; FATIGUE DAMAGE; COMPOSITES; INSPECTION;

D O I：

10.1016/j.ndteint.2009.01.012

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This paper investigates vibrothermography for the detection of fatigue cracks in steel compact tension specimens using combined experimental and numerical analyses. First, a numerical modal analysis is carried out to predict the optimal excitation parameters. A coupled thermo-mechanical model is then built to simulate the thermographic inspection. The model predicts the detection of cracks as short as 0.1 mm that is also confirmed experimentally using a commercial infrared camera with a maximum error of 2.13% on the temperature distribution. The model reveals that the specimens' temperature increases at the crack vicinity according to the excitation frequency and is modulated due to the nonlinearity induced by the crack. The model also shows that the stress at the crack tip is lower than the material's yield stress, which makes the test truly non-destructive. Crown Copyright (C) 2009 Published by Elsevier Ltd. All rights reserved.

引用

页码：345 / 352

页数：8

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