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Indexed by:期刊论文

Date of Publication:2012-11-01

Journal:INTERNATIONAL JOURNAL OF FATIGUE

Included Journals:SCIE、EI、Scopus

Volume:44

Page Number:1-7

ISSN No.:0142-1123

Key Words:Fatigue behavior; Damage assessment; Infrared thermography; Energetic damage model

Abstract:A new method, based on the infrared thermography, was proposed and applied to rapidly determine the fatigue behavior of Q235 steel. The temperature evolution due to localized microplasticity was considered as the fatigue damage indicator, and good predictions were confirmed between the predicted values and the traditional values. The temperature patterns of the hot-spot zone on the specimen surface were tightly linked with the physical evolution of the fatigue damage in order to identify the damage status for safety evaluation. Based on the limiting energy theory, an energetic damage model was established to predict the residual fatigue life. (C) 2012 Elsevier Ltd. All rights reserved.