INVESTIGATION OF STRESS-STRAIN STATE OF TRANSVERSELY ISOTROPIC PLATES UNDER BENDING

What is it about?

Methods of reducing the three-dimensional problems of the theory of elasticity for plates to the two-dimensional ones are considered. An analysis of the approaches to decreasing the quantity of independent variables allowed us to conclude that when calculating the thin-wall elements of structures, made of contemporary composite materials, it is necessary to use the refined theories of plates and shells. These theories make it possible to evaluate the phenomena, connected to taking account of transverse shifts and compression. Since the classical theory of Kirchhoff-Love does not consider these phenomena, then this theory yields significant error during calculations. The refined theories also make it possible to examine not only the thin plates, but also the plates of medium and large thickness.

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Why is it important?

Our studies suggest that in the calculation of thin-walled elements of constructions made of advanced composite materials on concentrated forces it is necessary to use the refined theory of plates and shells. These theories allow estimating the phenomena associated with taking into account the transverse shear and compression. The practical significance of the results is the ability to use them in calculations related to the design and definition of the operating parameters of thin-walled elements of constructions containing the stress concentrator

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