Development of the layered shell finite element with interlayer slip

Abstract

A finite element analysis using a new layered shell element considering the partial interaction of the layers has been proposed. The proposed layered shell element improves the efficiency of analysis by adding only the DOFs in the slip direction without modeling the layers using additional shells. Existing elements that attempted interlayer slip were limited to solid elements or beam elements, and there were disadvantages in that the DOFs required when analyzing thin materials was increased or that two-dimensional partial interactions were not considered. Unlike with previous element, the stacking can be expressed with two additional DOFs per node by defining the direction in which the slip occurs in the two-dimensional slip plane. 2D interlayer slip between layers can also be considered using the defined slip directions. As a result of comparing through several numerical examples it was confirmed that accurate finite element analysis is possible with high computational efficiency compared to using the solid element considering the adhesive layer. If this linear shell is extended to a nonlinear formulation, it is expected that more accurate analysis will be possible even through the deformation increase.