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Cumulative damage in low-cycle fatigue

An analysis is presented for cumulative damage on the basis of absorbed plastic energy

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Abstract

Cyclic-deformation behavior of low-carbon steel and copper under constant-stress amplitude and in a two-step stress change has been studied in the intermediate life range. Under constant-stress amplitude, there is initial softening followed by a hardening process in low-carbon steel. In the case of copper, hardening sets in from the initial stages of stress application. The total hysteresis energy absorbed is not a material constant, but depends on the applied stress. The strain-hardening/strain-softening behavior under the second stress level is different from the standard fatigue tests and is dependent on the first stress level. An energy-based analysis has been found to predict fairly well the cumulative damage life in low-cycle fatigue.

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Authors and Affiliations

  1. Mechanical Testing Laboratory, Indian Institute of Technology, 600036, Madras, India

    V. M. Radhakrishnan

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  1. V. M. Radhakrishnan
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Radhakrishnan, V.M. Cumulative damage in low-cycle fatigue. Experimental Mechanics 18, 292–296 (1978). https://doi.org/10.1007/BF02324159

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  • DOI: https://doi.org/10.1007/BF02324159

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