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A simple method of determining stress intensity factor K I from isochromatic fringe loops

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Abstract

A new photoelastic method of obtaining mode I stress intensity factor (SIF) is presented. The method considers the influence of far field stress, σ ox , on the value of SIF. The only information needed for K I calculation is the area between isochromatic fringe loops. The method is examined by two kinds of specimen in different load cases. Experimental results show that it is quite simple and of high precision.

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Authors and Affiliations

  1. Opening Laboratory of Mechanics, Central South University of Technology, 410083, Changsha, China

    Chen Feng & Sun Zongqi

Authors
  1. Chen Feng
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  2. Sun Zongqi
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Project supported by the National Natural Science Foundation of China

Synopsis of the first author Chen Feng, associate professor, born in October 1949, worked on experimental fracture mechanics in Sweden from 1990 to 1995 as a visiting scholar. Major research fields include perturbation and weight function method and its application, experimental mechanics, rock fracture mechanmics.

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Chen, F., Sun, Z. A simple method of determining stress intensity factor K I from isochromatic fringe loops. J Cent. South Univ. Technol. 5, 124–126 (1998). https://doi.org/10.1007/s11771-998-0052-5

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  • DOI: https://doi.org/10.1007/s11771-998-0052-5

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