NISA II/COMPOSITE is a powerful capability in the NISA II program for solving static, dynamic, and buckling problems for structures made of composite materials. The specification of fiber orientations for modeling curved surfaces is one of the outstanding features of the program. Three elements for modeling layered composite structures are: 3D layered composite shell, 3D layered sandwich shell, and 3D layered solid (overlay). There is no restriction on the number of layers or the lamination sequence. The thickness and the fiber angles can vary from node to node. The material properties can be temperature dependent allowing calculation of thermal stresses. Edge effects, delamination and interlaminar stress calculation are supported. Failure theories included are: Maximum stress, Modified Hill-Mises, Tsai-Wu, and Delamination.
Vipul R. Kinariwala
Chief Engineer Engineering Mechanics Research Corp. 1607 East Big Beaver Road Troy, MI 48083 USA 313-689-0077 fax:313-689-7479