Accession Number : ADA183955

Title :   A Sixteen Node Shell Element with a Matrix Stabilization Scheme.

Descriptive Note : Interim rept. Oct 86-Mar 87,

Corporate Author : MARYLAND UNIV COLLEGE PARK DEPT OF AEROSPACE ENGINEERING

Personal Author(s) : Rhiu,J J ; Lee,S W

PDF Url : ADA183955

Report Date : 22 Apr 1987

Pagination or Media Count : 49

Abstract : A sixteen node shell element is developed using a matrix stabilization scheme based on the Hellinger-Reissner principle with independent strain. Initially the assumed independent strain is divided into a lower order part and a higher order part. The stiffness matrix corresponding to the lower order assumed strain is equivalent to the stiffness matrix of the assumed displacement model element with the reduced integration scheme. The spurious kinematic modes of the element are suppressed by introducing a stabilization matrix associated with a judiciously chosen set of higher order assumed strain fields. Numerical results show that this element is free of locking even for very thin plates and shells. (Author)

Descriptors :   *SHELLS(STRUCTURAL FORMS), STRAIN(MECHANICS), HEMISPHERICAL SHELLS, TOROIDS, DISPLACEMENT, INTEGRATION, KINEMATICS, MATRICES(MATHEMATICS), MODELS, NODES, NUMERICAL ANALYSIS, PLATES, REDUCTION, SPURIOUS EFFECTS, STIFFNESS, THINNESS

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE