The finite element analysis of general shell structures is faced with the problems of shear and membrane locking. These problems are well known and much research has been focused on the development of powerful shell elements to eliminate these problems. This book employs three shell elements these are four nodes degenerated shell element, four nodes flat shell element and nine nodes degenerated shell element. Each one of these elements has six degrees of freedom per node. Additional elements have been developed to avoid problems; these are: four nodes element, employing the Mixed...