Multi-objective optimization of sandwich composite pressure hull for decreasing weight and drag force and increasing buckling load capacity

Helal, Mahmoud; Fathallah, Elsayed

doi:10.1088/1757-899X/974/1/012009

Multi-objective optimization of sandwich composite pressure hull for decreasing weight and drag force and increasing buckling load capacity

Document Type : Original Article

Authors

Mahmoud Helal ¹
Elsayed Fathallah ²

¹ Department of Mechanical Engineering, Faculty of Engineering, Taif University, Taif 21974, Saudi Arabia., Production and Mechanical Design Dept., Faculty of Engineering, Mansoura University, Mansoura 35516, Egypt.

² Department of Civil Engineering, Military Technical College, Cairo, Egypt., Ships and Submarines Engineering Department, Military Technical College, Cairo, Egypt.

10.1088/1757-899X/974/1/012009

Abstract

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 (Tcore) has a great effect to resist the shell buckling. While, has a little effect on both Tsai-Wu and maximum stress failure index.

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