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A program-control unit for fatigue-testing machines

Using a punched-tape input, the unit can control an electrical vibrating type of fatigue machnie to vary the load applied to a fatigue specimen

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Abstract

Though equipment is available to produce programmed tests on fatigue specimens, such equipment is usually expensive to purchase and complicated to maintain. The tendency, therefore, has been to use constant-amplitude tests and, when designing a member where the loading spectrum is known, to combine the test results according to various theories, thus estimating the fatigue life.

This article describes a control unit for an electromagnetic vibrator. The unit, being basically simple in concept, has enabled loads of varying magnitude to be applied to a fatigue specimen in accord with instructions on a punched input tape.

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References

  1. Alder, J. F., “Fatigue Damage to Welded Structures,” Brit. Welding Jnl. (October 1964).

  2. Crichlow, W. J., McCullock, A. J., Young, L., and Melcom, M. A., “An Engineering Evaluation of Methods for the Prediction of Fatigue Life in Air Frame Structures,” ASD-TR 61, 434–437 (March 1962).

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Authors and Affiliations

  1. Department of Civil and Structural Engineering, University of Sheffield, Sheffield, England

    C. Osgerby (Lecturer) & R. Pearson (Postgraduate Student)

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  1. C. Osgerby
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  2. R. Pearson
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Osgerby, C., Pearson, R. A program-control unit for fatigue-testing machines. Experimental Mechanics 6, 19A–22A (1966). https://doi.org/10.1007/BF02327240

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  • DOI: https://doi.org/10.1007/BF02327240

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