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《Journal of Beijing Institute of Civil Engineering and Architecture》 1988-01
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On the Identified Lagrange Multiplier Method and a Generalized Variational Principle in Nonlinear Theory of Elasticity

Li Yuejun  
Based on a preliminary study on the identified multiplier method, it is pointed out in this paper that this method is a unite method of functional transformation in variational principle. On the basis of Hellinger-Reissner variational principle, the critical variational constrained condition is relieved by use of the identified multiplier method, and a generalized variational principle with three kinds of independent variable in nonlinear theory of elasticity is obtained.
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