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Finite Element Analysis Using MATLAB Toolbox

AppendixDFinite Element Analysis UsingMATLAB ToolboxIn this section, a MATLAB3toolbox CALFEM4is introduced. This Toolbox is developedby Lund University in 1999 and can be downloaded free of charge from CALFEM provides functions that can be used for Finite elementanalysis of a variety of structures. Compared to other Finite Element programs, this tool-box has many advantages for education. Many commercial programs automatically per-form Finite Element process. Thus, the users do not understand the process of constructingelement stiffness matrices, assembling them, and applying boundary conditions. In thistoolbox, however, the users must provide every step of Finite Element process.

stiffness matrix Kin the location that is specified in the first row of Edofarray. The result is returned to the global stiffness matrix Kso that the matrix Kcontains the accumulated data from all elements. The global stiffness matrix Kin (P.4) is singular because there is a rigid body motion in the system.

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