Optimization of Composite Material Grid Structure
In this paper, design and analysis optimization methodology of Advanced Grid-Stiffened (AGS) cylindrical structures under axial compression is presented. The design optimization methodology has been broadly divided into two phases- initial and detailed phases. In the initial phase of design, two open grid types are assessed for the cylindrical grid structure. These are the axial grid and the circumferential grid. The axial grid consists of axial stiffeners, which are parallel to the axis of the cylinder, and helical stiffeners arranged at a ± angles. The circumferential grid is made of hoop stiffeners which are circular and helical stiffeners. The second optimization phase includes a detailed analysis of the parameters influence on the stiffness of a cylindrical grid structure. An optimal design exercise is essentially that of determining the design parameters that would resist the design load with desired Factor of Safety and minimum mass. The calculations and comparisons between different designs are based on numeric parametric Finite Element Method (FEM) generated and analyzed with MSC-NASTRAN software and supported by empirical methods.
Authors: Ilan Weissberg, Moshe Trester, Amit Dinur, and Tal Yehoshua
Conference: SAMPE Seattle 2017