Conforming and nonconforming transition plate bending elements for an adaptive h-refinement

摘要

Two types of quadrilateral transition elements based on the Mindlin- Reissner plate theory are presented for the adaptive mesh refinement in the Plate bending problem. The first type of transition element, designated as The conforming transition element, has piecewise linear folded side (s) Which preserves the interelement compatibility when connected to refined Four-node elements, and has been improved by construction of the substitute Shear strain fields. The other type of elements, designated as the noncon- Forming transition element, can have curved side (s) and has been improved By the selective addition of nonconforming displacement modes.