Abstract
The application of substructuring techniques to the analysis of localized material nonlinear problems has been known for years. To substructure before starting nonlinear analysis, the analyst must know the locations and sizes of the possible plastic regions in advance. Should plastification occur in the linear substructures the analysis must stop; otherwise, inaccurate results are obtained. These difficulties can be eliminated by adaptive substructing techniques. In adaptive substructure analysis, the nonlinear substructure grows when the plastic zone expands or new plastification occurs in different places. This paper describes both interactive- and self-adaptive substructuring.
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