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Simplified and refined finite element approaches for determining stresses and internal forces in geometrically nonlinear structural analysis (1979)

Robinson, J. C.

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Publication Date: 2019-07-13

Description: Two methods for determining stresses and internal forces in geometrically nonlinear structural analysis are presented. The simplified approach uses the mid-deformed structural position to evaluate strains when rigid body rotation is present. The important feature of this approach is that it can easily be used with a general-purpose finite-element computer program. The refined approach uses element intrinsic or corotational coordinates and a geometric transformation to determine element strains from joint displacements. Results are presented which demonstrate the capabilities of these potentially useful approaches for geometrically nonlinear structural analysis.

Keywords: STRUCTURAL MECHANICS

Type: AIAA PAPER 79-0746 , Structures, Structural Dynamics, and Materials Conference; Apr 04, 1979 - Apr 06, 1979; St. Louis, MO

Format: text

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