DKMQ24 shell element with improved membrane behaviour

06/14/2019

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by   Vítězslav Štembera, et al.

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An improvement of membrane behaviour of the four-node shell element with 24 degrees of freedom DKMQ24 proposed by Katili et.al (2015) is presented. This improvement is based on the different approximation of drilling rotations based on Allman's shape functions. This element, called DKMQ24+, was tested on eight standard benchmark problems for the case of linear elasticity. The element is free of shear and membrane locking and exhibits lower numerical error for the membrane and the membrane-dominated problems.