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Measurement of Thermal Residual Strain Induced During the Hardening of a Sheet Metal and Reinforced Composite by Digital Shearography
Technical Paper
2005-01-0895
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Shearography is an interferometric, non-contact and full field method for direct measurement of first derivatives of deformation (strain). It is relatively insensitive to environmental disturbances and has been proven to be a practical measuring tool for nondestructive testing and evaluation (NDT/NDE). In this paper it has been employed to study the thermal residual strains produced during the reinforcement of a composite to a sheet metal. The reinforced composite is used as an additive to provide extra strength to the sheet metal. The reinforcement process involves gradual heating of the glued composite to a temperature of around 175°C - 180°C and then allowing it cool down to room temperature. During the heating process both the composite and the sheet metal are strained, but during the cooling process some amount of strain is left behind in the sheet metal and it has a key role to play when the product is used for critical parts in automobile and aircraft industries. These strains are induced into the metal during a certain temperature range during the cooling process and this paper will focus on the determination of the temperature range and the strain behavior due to the inducement of residual strain.
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Citation
Samala, P., Liu, S., and Yang, L., "Measurement of Thermal Residual Strain Induced During the Hardening of a Sheet Metal and Reinforced Composite by Digital Shearography," SAE Technical Paper 2005-01-0895, 2005, https://doi.org/10.4271/2005-01-0895.Also In
References
- Yang L. X. Chen F. Steinchen W. Hung Y.Y. “Digital Shearography for Nondestructive Testing: Potentials, Limitations and Applications,” Journal of Holography and Speckle 1 2 2004
- Hung Y.Y. Shearography: A new optical method for strain measurement and nondestructive testing Opt. Eng. 21 3 391 395 1982
- Steinchen W. Yang L.X. Kupfer G. Maechel P. Voessing F. “Strain analysis by means of digital shearography: potential, limitations and demonstration,” Journal of Strain analysis 33 1998 2 171 182
- Steinchen W. Yang L.X. Digital Shearography; Theory and Application of Digital Speckle Pattern Shearing Interferometry SPIE Press Bellingham, Washington USA 2003
- Creath K. Phase-Shifting Speckle Interferometry Applied Optics 24 18 3053 3058 1985