T. Krishnamurthy et Is. Raju, AN INDEPENDENT REFINEMENT AND INTEGRATION PROCEDURE IN MULTIREGION FINITE-ELEMENT ANALYSIS, Communications in numerical methods in engineering, 11(5), 1995, pp. 383-390
An independent refinement and integration procedure is developed to co
uple together independently modelled (global and local) regions in a s
ingle analysis. The finite element models can have different levels of
refinement and the nodes along the interface between them need not co
incide with one another. A spline interpolation function that satisfie
s the linear isotropic plate-bending differential equation is used to
relate the local model interface nodal displacements to the global mod
el interface displacements. The proposed independent refinement and in
tegration procedure is validated by applying it to problems involving
in-plane and out-of-plane deformations.