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090			_aB-17918
245	1	0	_aHybrid-Mixed Shell Finite Elements and Implicit Dynamic Schemes for Shell Post-buckling
490	0		_vIn Recent Developments in the Theory of Shells. Springer, Cham., p.383-412, 2019
520	3		_aTwo topics are addressed: (i)hybrid-mixed formulations for geometrically exact shell models, and (ii)post-buckling analysis of shells by implicit dynamics schemes. As for the hybrid-mixed elements, seven formulations are compared. The one with the assumed-natural-strain interpolation of membrane strains shows very little sensitivity to mesh distortion for curved shells. Another one, which is based on the Hu-Washizu three-field functional, allows for very large solution increments. Hence, a new element is proposed that combines positive features of both mentioned formulations. As for the post-buckling analysis of shells, we use implicit dynamics. In particular, five time-stepping schemes are tested for shell stability problems that include mode jumping. These are trapezoidal rule, schemes with numerical dissipation in the high-frequency range, and energy-momentum conserving method. Numerical examples show that the dissipative schemes are suitable for simulation of complex phenomena that appear in shell stability.
650	1	4	_aGEOMETRICALLY EXACT SHELL MODELS
650	1	4	_aHYBRID-MIXED SHELL ELEMENTS
650	1	4	_aIMPLICIT DYNAMICS SCHEMES
650	1	4	_aNUMERICAL DISSIPATION
650	1	4	_aSHELL STABILITY ANALYSIS
700	1	2	_aLavrencic, M.
700	1	2	_aBrank, B.
856	4	0	_uhttps://drive.google.com/file/d/1WwsgiqQUgNGrDLxLj5Eh6lwLTpMhHYMd/view?usp=drivesdk _zPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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