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Postbuckling performance of the TRIC natural mode triangular element for isotropic and laminated composite shells. (English) Zbl 0945.74063

Summary: We present the computational performance and the achieved accuracy of the TRIC flat triangular shell element for nonlinear postbuckling analysis of arbitrary isotropic and composite shells. The element is based on the natural mode finite element method, which allows a convenient description of the current position of the structure. These natural modes are assigned to a convective coordinate system, which follows the element during deformation within the framework of an Eulerian motion. With respect to this coordinate system, the natural modes are additive. Numerical examples verify computational efficiency of the element. Natural energy measures provide information about the energy allocation during nonlinear deformation and the interplay of the separate energy components.

MSC:

74S05 Finite element methods applied to problems in solid mechanics
74G60 Bifurcation and buckling
74E30 Composite and mixture properties
74K25 Shells

Software:

TRIC
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Full Text: DOI

References:

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