Proportional limit

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The proportional limit is the maximum stress a material can undergo where the relationship between stress and strain are linearly proportional. This proportionality is known as Hooke's law.

The concept of proportional limit should not be confused with the elastic limit, which is the maximum stress a material can undergo at which all strains are recoverable. Ordinarily, the elastic limit is greater than the proportional limit; however, for many materials (such as steel), the two are close enough to be identical for all practical purposes.

[edit] References

  • Engineer's Handbook
  • Boresi, A. P., Schmidt, R. J., and Sidebottom, O. M. (1993). Advanced Mechanics of Materials, 5th edition. John Wiley & Sons. ISBN 0-471-55157-0
  • Oberg, E., Jones, F. D., and Horton, H. L. (1984). Machinery's Handbook, 22nd edition. Industrial Press. ISBN 0-8311-1155-0
  • Shigley, J. E., and Mischke, C. R. (1989). Mechnical Engineering Design, 5th edition. McGraw Hill. ISBN 0-07-056899-5
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