Multi-objective optimization of an intersecting elliptical pressure hull as a means of buckling pressure maximizing and weight minimization
-
Mahmoud Helal
and Elsayed Fathallah
Abstract
Pressure hulls are one of the keys in the design of submarines. In order to improve the accuracy and efficiency of pressure hull structure, methods of optimizing it were studied. In the present study, an overview of the multi-objective optimization of intersecting cross elliptical pressure hulls (ICEPH) with and without the core layer under hydrostatic pressure was investigated in order to maximize buckling load capacity (λ) and minimize the buoyancy factor (B.F) of the ICEPH according to the design requirements. Five models were built, four composite models constructed from boron/epoxy (B(4)/5505) and carbon/epoxy composite (USN-150) with and without core layer. The fifth is a reference metallic model constructed from HY100. Criteria regarding failure for both composite and metal shells are considered as indications of optimization. Both Tsai-Wu and maximum stress failure criteria were employed to check the composite failure. The modeling and the multi-objective optimization were performed using ANSYS parametric design language (APDL) in order to determine mass, critical buckling load, and failure criteria. The results illustrated that carbon fiber-epoxy composite (USN-150) with a core layer is preferred for obtaining minimum weight, with an improvement ratio (IR) 64.314 % superior to that of a metallic pressure hull. By contrast, (boron/epoxy B(4)/5505) without a core layer is preferred to obtain a maximum buckling load.
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© 2019, Carl Hanser Verlag, München
Articles in the same Issue
- Inhalt/Contents
- Contents
- Fachbeiträge/Technical Contributions
- Mechanical properties of cryogenically treated AA5083 friction stir welds
- Fatigue life evaluation of composite wing spar cap materials
- Effect of Cu addition on porous NiTi SMAs produced by self-propagating high-temperature synthesis
- Optimized random sampling for the load level method in Wöhler tests
- Monte Carlo simulation and evaluation of burst strength of pressure vessels
- Stress analysis of a Wankel engine eccentric shaft under varied thermal conditions
- Effectiveness of Ti micro-alloying for the suppression of Fe impurities in AZ91 Mg alloys and associated corrosion properties
- Mechanical properties of hybrid fiber reinforced concrete and a nondestructive evaluation
- Multi-objective optimization of an intersecting elliptical pressure hull as a means of buckling pressure maximizing and weight minimization
- Preload dependent material properties of lamination stacks for electric machines
- Effect of inoculant type and treatment material quantity on properties of vermicular graphite cast iron rail vehicle brake discs
- Effects of the chemical treatment of avocado pear wood filler on the properties of LDPE composites
- Uncertainty analysis of cutting parameters during grinding based on RSM optimization and Monte Carlo simulation
- Applicability of compact tension specimens for evaluation of the plane-strain fracture toughness of steel
Articles in the same Issue
- Inhalt/Contents
- Contents
- Fachbeiträge/Technical Contributions
- Mechanical properties of cryogenically treated AA5083 friction stir welds
- Fatigue life evaluation of composite wing spar cap materials
- Effect of Cu addition on porous NiTi SMAs produced by self-propagating high-temperature synthesis
- Optimized random sampling for the load level method in Wöhler tests
- Monte Carlo simulation and evaluation of burst strength of pressure vessels
- Stress analysis of a Wankel engine eccentric shaft under varied thermal conditions
- Effectiveness of Ti micro-alloying for the suppression of Fe impurities in AZ91 Mg alloys and associated corrosion properties
- Mechanical properties of hybrid fiber reinforced concrete and a nondestructive evaluation
- Multi-objective optimization of an intersecting elliptical pressure hull as a means of buckling pressure maximizing and weight minimization
- Preload dependent material properties of lamination stacks for electric machines
- Effect of inoculant type and treatment material quantity on properties of vermicular graphite cast iron rail vehicle brake discs
- Effects of the chemical treatment of avocado pear wood filler on the properties of LDPE composites
- Uncertainty analysis of cutting parameters during grinding based on RSM optimization and Monte Carlo simulation
- Applicability of compact tension specimens for evaluation of the plane-strain fracture toughness of steel