Abstract
A new projection scheme to improve the performance of one-point quadrature shell elements is presented. The projection is performed elementwise and enforces invariance of the internal power to rigid body motion and drill rotation. The projection is especially suitable for 6 degree-of-freedom per node explicit programs, and can be easily implemented as an integral part of the subroutine that calculates the internal forces on the element level. Problems that could not be solved accurately with one-point quadrature elements, such as the twisted beam problem, show excellent results even for very coarse meshes when the projection is used.
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