Hierarchical assumed strain-vorticity shell element with drilling degrees of freedom
The formulation of stabilized assumed strain-vorticity degenerated shell element with six degrees-of-freedom per mode is developed. The penalty formulation is employed to alleviate rank deficiency caused by drilling degrees-of freedom. The assumed strain-vorticity formulation for p-type shell elements is utilized to circumvent membrane and shear locking at lower polynomials as well as locking associated with the penalty formulation. Numerical experiments are conducted to test the element performance.
hierarchical shell penalty formulation assumed vorticity-strain p-version