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Data Acquisition System for High Strain Fatigue Testing

  • P. Adkin
  • R. J. Rider
  • S. J. Harvey

Abstract

This paper describes a data acquisition system for use in material tests on tubular steel specimens. These were subjected to combinations of three types of loading i. e. 1) Axial tension and compression, 2) Cyclic Torsion, 3) Internal Pressure.

Test were performed at particular loading rates in which essentially loads and displacements were required to be measured. Loads were measured via strain gauge bridges and displacements by Rotary and Linear Variable Differential Transformers (RVDT’s and LVDT’s). Fine control of strains and displacements was obtained using stepper motors.

The stepper motor control and data acquisition systems were based around a Gemini 64K micro-computer. The system was to be capable of sampling sufficient data within each cycle to allow cyclic stress-strain curves to be defined.

Keywords

Data Acquisition System Linear Variable Differential Transformer Hoop Strain Cyclic Plastic Strain Cyclic Torsion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Adkin, P. “Yield Surfaces in Cyclic Plasticity” Ph.D. Thesis 1986Google Scholar

Copyright information

© Kogan Page Ltd. 1989

Authors and Affiliations

  • P. Adkin
    • 1
  • R. J. Rider
    • 2
  • S. J. Harvey
    • 2
  1. 1.Land RoverUK
  2. 2.Department of Combined EngineeringCoventry PolytechnicUK

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