混凝土梁疲劳致力磁效应及数值模拟方法

doi:10.11896/cldb.24010127

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Abstract The characteristics of four typical magneto-mechanical models were analyzed based on the magneto-mechanical effect mechanism of ferromagnetic materials. By comparing the numerical simulation results of the magneto-mechanical effect in the static loading stage of a flexural concrete beam, it was found that the stress-coercive force relationship representing macroscopic magnetic properties exhibited good applicability. A magneto-mechanical model suitable for the fatigue stage of concrete beams was established based on the decay mechanism of the magneto-mechanical effect under high stress levels, and numerical simulations of the magneto-mechanical effect in fatigue-induced flexural concrete beams were conducted to investigate the correlation between characteristic magnetic signals and fatigue life. The research results showed that the modified magneto-mechanical model exhibited a three-stage variation pattern in the static loading stage, consistent with experimental results, with a simulation error of approximately 8%. The simulated magneto-mechanical time-varying curve in the fatigue stage showed a consistent variation pattern with experimental results, with an error within 15%. A mapping relationship equation between fatigue life and characteristic magnetic signals in flexural concrete beams was established, and the calculated results were in good agreement with experimental results, serving as a predictive model for fatigue life in flexural concrete beams.

Key words： concrete beam fatigue damage magneto-mechanical effect magneto-mechanical model fatigue life

Published: 10 January 2025 Online: 2025-01-10

CLC number:

TU375

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	Articles by authors
	JIN Weiliang
	LIU Zhendong
	ZHANG Jun

Cite this article:

JIN Weiliang,LIU Zhendong,ZHANG Jun. Magneto-Mechanical Effect and Numerical Simulation Method for Fatigue of Concrete Beams[J]. Materials Reports, 2025, 39(1): 24010127-9.

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https://www.mater-rep.com/EN/10.11896/cldb.24010127 OR https://www.mater-rep.com/EN/Y2025/V39/I1/24010127

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