Linear Static Analysis of Composite Hat Stiffener Based on ANSYS

In order to research the effect of core material on strength and stiffness of hat stiffener, using the finite element method which establishes a series of hat stiffener finite element models with different core materials. This research indicates that foam core material in simple models can be negligible, and pinewood needs to be considered. For large and complex composite material structures, from the security and efficiency aspects to consider, the core material of hat stiffener could be ignored in their models.Using Beam188, Beam189, Shell99 element to simulate rectangular hat stiffeners, the results shows that the beam elements can simulate the hat stiffeners instead of shell elements when setting up a finite model of the whole ship in order to simplify the modeling.This study provides a basis for the simplification of GFRP fishing vessel finite element model and makes great significance to its direct calculations and rapid design. Meanwhile, this study has a certain reference value for the design and calculation of the hat stiffeners in composite ship．