The variational principles of coupled systems in photoelasticity
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This paper presents an energy principle, zero different principle of coupled systems in photoelasticity, from which the potential energy, the complementary energy, generalized potential energy and generalized complementary energy variational principles of the coupled systems in photoelasticity are derived.
What is called the coupled systems means that two deformational bodies, for which figures, sizes, laods and boundary conditions are the same and they are all in actual states but they are made of different materials.
Prototype body and model body in photoelasticity are essentially the coupled systems, therefore the above principles become the theoretical basis of defining the influence of Poissons ratio v on accuracy of the frozen-stress method.
Key wordsphotoelasticity coupled systems zero different work principle coupled variational principle
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