ISSN:
0272-8397
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
An exact strain-optic law for othotropic materials has been derived using Pockels' theory of crystalline photoelasticity. The law requires three experimentally determined photoelastic constants. Photoelastic response of materials such as glass-fiber-reinforced epoxy or polyester composites subjected to any state of strain can be predicted through this law. However, due to practical difficulties, this law is not sufficient to solve for principal strain differences or the direction of principal strain from conventional measurements in a polariscope. An approximate strain-optic law, which has been derived by minimizing square of the error between predictions of exact and approximate laws, can be employed to estimate the difference between principal strains and their directions. The error in using the approximate law appears to be small. The approximate strain-optic law has been found to be preferable over an approximate stress-optic law.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pc.750030308
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