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Optical Transducers and Techniques in Engineering Measurement pp 39–60Cite as

Photoelastic Transducers

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Abstract

The basic principles of photoelasticity have been known for many years.1 This chapter deals with how they are used in transducers to measure strain, load and stress. The photoelastic effect is dealt with briefly in order to explain what is happening within the transducers. The linear relationship between fringe order and strain or stress in the birefringent material is emphasised.

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Abbreviations

E :

Modulus of elasticity

E :

Modulus of elasticity

K :

Dimensionless constant representing the optical strain sensitivity of the birefringent materials

N :

Number of fringes

k :

Ratio of principal stresses

l :

Length of light path

εx :

Major principal strain

εy :

Minor principal strain

λ:

Wavelength of light

μ:

Poisson’s ratio

σx :

Major principal stress

σy :

Minor principal stress

References

  1. Frocht, M. M. Photoelasticity, vol. 1 (1941) and vol. 2 (1948), John Wiley, Chichester.

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  2. Zienkiewicz, O. C. and Holister, G. S. Three-dimensional photoelasticity, chapter 13 in: Stress Analysis, 1965, John Wiley, Chichester.

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  3. Photolastic Inc. (Malvern, Pennsylvania). Introduction to stress analysis by the photoelastic coating technique. Tech. Bulletin TDG-1, 1974.

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  4. Hawkes, I., Dhir, R. K. and Rose, H. Civ. Eng., 59, 1964, 1536–40.

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  5. Hawkes, I. and Fellers, G. E. Int. J. Rock Mech. & Min. Sci., 6, 1969, 143–58.

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  6. Buswell, H. J., Moore, D. R. and Owens, A. Expt. Mech., 14, 1974, 274–80.

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  7. Hawkes, I. Strain, 3, 1967, 1–7.

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  8. Photolastic Inc. (Malvern, Pennsylvania). Corrections to photoelastic coating fringe order measurements. Tech. Bulletin T-405, 1977.

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  9. Hooper, J. A. The theory and development of load cells incorporating photoelastic glass disc transducers. PhD Thesis, Sheffield University, 1968.

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  10. Coutinho, A. Int. Assoc. for Bridge & Struct. Eng. Pub., 7, 1949.

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  11. Barron, K. Mines Branch, Dept. Mines Tech. Survey, Ottawa, 1964.

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  12. CIRIA (London). Instrumentation investigations in Clywedog dam. Technical Note No. 9, 1970.

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Author information

Authors and Affiliations

  1. AVT Engineering Services, Stockport, UK

    D. R. Moore

Authors
  1. D. R. Moore
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Editor information

Editors and Affiliations

  1. Department of Civil Engineering, University College, SA2 8PP, Swansea, UK

    A. R. Luxmoore

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© 1983 Applied Science Publishers Ltd

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Moore, D.R. (1983). Photoelastic Transducers. In: Luxmoore, A.R. (eds) Optical Transducers and Techniques in Engineering Measurement. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-6637-6_2

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  • DOI: https://doi.org/10.1007/978-94-009-6637-6_2

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-009-6639-0

  • Online ISBN: 978-94-009-6637-6

  • eBook Packages: Springer Book Archive

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