Abstract
According to the multistage strength degradation theory which has recently emerged from studies on the material and structural behaviour of concrete, 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. Here we report a new finding on the waveform variation of the maximum strain energy along the axis of load cycles in a structural member or machine part under fatigue. A strain energy diagram is calculated based on the system’s response to the maximum load at any given time. The diagram shows the accumulation and release of total strain energy of a system at its ultimate strength, synchronising with the cycle of strength degradation. Therefore, this diagram provides real-time information on how a system responds to cyclic loading, which is of great importance to both fundamental research and design practice.
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Shi, Z., Nakamura, Y., Nakano, M. (2014). Strain Energy Diagram for Characterising Fatigue Behaviour in Structural Members and Machine Parts Subjected to Repeated Loads. In: Srivatsan, T.S., Imam, M.A., Srinivasan, R. (eds) Fatigue of Materials III. Springer, Cham. https://doi.org/10.1007/978-3-319-48240-8_8
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DOI: https://doi.org/10.1007/978-3-319-48240-8_8
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48597-3
Online ISBN: 978-3-319-48240-8
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