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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 49, Iss. 1 — Jan. 1, 1959
  • pp: 61–66

Observations Concerning Delayed Elastic Effects in Glass

W. C. LEVENGOOD and T. S. VONG  »View Author Affiliations


JOSA, Vol. 49, Issue 1, pp. 61-66 (1959)
http://dx.doi.org/10.1364/JOSA.49.000061


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Abstract

Indentation regions were formed in glass by pressing a hardened steel ball into the surface using loads below the fracture limit. These indented regions were found to recover with time and the process was studied with optical interference methods. A linear relationship was found between the logarithm of the depth of the indentation and the logarithm of the elapsed time after the load removal. The maximum load studied was about 5 × 105 psi. The indentation effect could still be observed at loads around 1 × 105 psi.

Citation
W. C. LEVENGOOD and T. S. VONG, "Observations Concerning Delayed Elastic Effects in Glass," J. Opt. Soc. Am. 49, 61-66 (1959)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-49-1-61


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References

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