ISSN:
1662-7482
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The stress analysis for a model with initial stresses, which we term a residual stressmodel, is performed by digital photoelasticity. The stresses applied on the residual stress model areobtained by analyzing both the initial stresses and the resultant stresses. The method used foranalyzing the stresses applies the principle of superposition of the stress to photoelasticity, which is awell-known technique in the field of elasticity. In the digital photoelasticity technique used, theprincipal stress direction and the relative phase retardation are analyzed by photoelastictechniques using linearly polarized light. This technique overcomes the phase difference errorassociated with a quarter-wave plate by employing incident light at three different wavelengths, andusing an unwrapping technique that allows and to be determined using the arctangent function.A residual stress model produced by a disk containing frozen stresses that was subjected to adiametral compressive load at an angle of 31 was used to experimentally test this method. Thevalues of the stresses of the loaded disk model analyzed were in good agreement with corre- spondingtheoretical values at all locations far from the loading points of the residual stress model
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/38/transtech_doi~10.4028%252Fwww.scientific.net%252FAMM.13-14.59.pdf
