Open AccessMulti-objective optimization of sandwich composite pressure hull for decreasing weight and drag force and increasing buckling load capacity
Author(s) -
Mahmoud Helal,
Elsayed Fathallah
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/974/1/012009
Subject(s) - buckling , hull , structural engineering , drag , parametric statistics , shell (structure) , composite number , stress (linguistics) , radius , materials science , fiber , core (optical fiber) , engineering , composite material , mathematics , computer science , linguistics , statistics , philosophy , computer security , aerospace engineering
In underwater applications, space vehicles, and aircrafts, the weight becomes an important factor. Additionally, the design of composites structures greatly depends on the number of layers and the fiber orientation angle. Therefore, this work presents the optimization of sandwich composite pressure hull in order to minimize (weight and drag force) and maximize the buckling load capacity using ANSYS Parametric Design Language (APDL). Tsai-Wu and maximum stress failure criteria were incorporated for predicting the first-ply failure. The major and minor radius of the pressure hull, the ring and long beams dimensions, the fiber orientation angle and layer thickness are taken as design variables. The results illustrated that, core thickness ( T core ) has a great effect to resist the shell buckling. While, has a little effect on both Tsai-Wu and maximum stress failure index.