Chapter 8

Three-Dimensional Interval Finite Element

Abstract

This chapter describes the interval finite elements for space truss, space frame, and linear tetrahedral elements. A systematic formulation of interval stiffness matrices and the elemental equations is presented. Uncertain interval parameters and the boundary conditions are considered to formulate interval elemental equations by using interval finite element method. It may again be noted that due to the interval computations involved, the interval finite element method is bit more complex than the traditional finite element method. But the essence of uncertainty may be handled for actual practical problems. But direct application of interval parameters may be difficult. Hence, the interval ...

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