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Evaluation of Residual Stresses in Plastics and Composites By Shearography
Technical Paper
1999-01-1254
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper presents an application of shearography, an optical method for full-field strain measurement, for evaluating residual stresses in plastic/composite components. The approach is based on measuring the change in slope of the component surface, which is caused by the release of residual stresses, in the vicinity of a small, shallow blind-hole or of a small indentation made on the underside of the component during testing. The severity of slope-change, and hence the fringe density, gives a measure of the residual stresses in the component. This method does not require laborious mounting of strain gages or transducers whose stiffness could affect the accuracy of measurements, and is therefore practical for use in both production and field environment.
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Citation
Hung, Y., Shang, H., Lin, L., Zhang, Y. et al., "Evaluation of Residual Stresses in Plastics and Composites By Shearography," SAE Technical Paper 1999-01-1254, 1999, https://doi.org/10.4271/1999-01-1254.Also In
Polymer Composites and Polymeric Materials for Energy Management and Occupant Safety
Number: SP-1448; Published: 1999-03-01
Number: SP-1448; Published: 1999-03-01
References
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- Wang, H.P. “The Alignment Error of the Hole-drilling Method,” Experimental Mechanics 19 1 23 27 January 1979
- Hung Y.Y. “Computerized Shearography and its Applications for Nondestructive Evaluation of Composites” Manual on Experimental Techniques for Testing of Composites Society of Experimental Mechanics 1998