Numerical studies on multistage strength degradation of notched concrete beams under sequential loading

Shi, Zihai; Nakamura, Yukari; Nakano, Mikio

doi:10.1016/j.ijfatigue.2010.11.017

Cited by 7 publications

(1 citation statement)

References 19 publications

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“…The multistage strength degradation theory, which has recently emerged from studies on the material and structural behaviour of concrete [1,2], provides a clear description of the fatigue mechanism that has been the focus of extensive research since the early nineteenth century [3][4][5]. According to this theory, fatigue is caused by the sporadic sudden change of cracking behaviour in a system under cyclic loading, leading to intermittent strength reduction of the system and its eventual failure.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Multistage Strength Degradation and the Associated Strain Energy Variation of S25C

Shi

Nakano

Liu

2014

AMR

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Abstract. The multistage strength degradation theory, which has recently emerged from studies on the material and structural behaviour of concrete, provides a clear description of the mechanism of fatigue. According to this theory, fatigue is caused by the sporadic sudden change of cracking behaviour in a system under cyclic loading, leading to intermittent strength reduction of the system and its eventual failure. As metal is the main engineering material plagued most by fatigue failure, this newly-established theory needs to be experimentally verified on metal, which is the aim of this study. The obtained test results present strong experimental evidence for the existence of multistage strength degradation processes in metals under cyclic loading, and the strength degradation is clearly triggered by the abrupt change of cracking behaviour. These tests confirm the relevance of the multistage strength degradation theory on metal fatigue, and the engineering implications of the study are discussed.

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