Lomboy, Gilson Rescober creator Kim, Kidu Chairperson Worsak Kanok-Nukulchai Examination Committee Barry, William Joseph Examination Committee Asian Institute of Technology (partial) Scholarship donor Mapua Institute of Technology (partial) Scholarship donor text series technical report th Bangkok Asian Institute of Technology 2002 continuing eng 48, 10 leaves The Hilbur-Hughes-Taylor method is implemented in XFINAS to analyze nonlinear dynamic shell problems. Two types of shell elements were made available for this purpose, an eight node co-rotational element developed by Kim (2002) and a new four-node shell element, XSHELL24. Two new shell elements with explicit tangent stiffness and internal force vector are developed, XSHELL20 and its extension, XSHELL24. The first has five degrees of freedom per node and the other has six degrees of freedom per node. Mass matrices were formulated for XSHELL24. One type was formed by lumping masses at the nodes and neglecting rotational inertia and the other was formed by the use of interpolation functions. Validation of the new shell elements was made through the patch test and various linear and nonlinear benchmarks. The two new shell elements provide reasonable results to most problems when compared with some standard four-node shell elements. The weaknesses of the two shell elements are also discussed. A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Civil Engineering Thesis (M.Eng.) - Asian Institute of Technology, 2002 Shells Nonlinear theories Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B07538 http://203.159.5.9/ait-thesis/detail.php?q=B07538 030207 20260818094236.0