Design Optimization and Non-Linear Buckling Analysis of Spherical Composite Submersible Pressure Hull
This paper describes an optimization study of a spherical composite submersible pressure hull employing a genetic algorithm (GA) in ANSYS. A total of five lay-up arrangements were optimized for three unidirectional composites carbon/epoxy, glass/epoxy, and boron/epoxy. The minimization of the buoyan...
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MDPI AG
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| author | Muhammad Imran Dongyan Shi Lili Tong Hafiz Muhammad Waqas Riaz Muhammad Muqeem Uddin Asghar Khan |
| author_facet | Muhammad Imran Dongyan Shi Lili Tong Hafiz Muhammad Waqas Riaz Muhammad Muqeem Uddin Asghar Khan |
| author_sort | Muhammad Imran |
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| description | This paper describes an optimization study of a spherical composite submersible pressure hull employing a genetic algorithm (GA) in ANSYS. A total of five lay-up arrangements were optimized for three unidirectional composites carbon/epoxy, glass/epoxy, and boron/epoxy. The minimization of the buoyancy factor <inline-formula> <math display="inline"> <semantics> <mrow> <mrow> <mo>(</mo> <mrow> <mi>B</mi> <mo>.</mo> <mi>F</mi> </mrow> <mo>)</mo> </mrow> </mrow> </semantics> </math> </inline-formula> was selected as the design optimization objective. The Tsai-Wu and Tsai-Hill failure criteria and buckling strength factor <inline-formula> <math display="inline"> <semantics> <mrow> <mrow> <mo>(</mo> <mi>λ</mi> <mo>)</mo> </mrow> </mrow> </semantics> </math> </inline-formula> were used as the material failure and instability constraints. To determine the effect of geometric non-linearity and imperfections on the optimized design, a non-linear buckling analysis was also carried out for one selected optimized design in ABAQUS. The non-linear buckling analysis was carried out using the modified RIKS procedure, in which the imperfection size changed from 1 to 10 mm. A maximum decrease of 65.937% in buoyancy factor <inline-formula> <math display="inline"> <semantics> <mrow> <mrow> <mo>(</mo> <mrow> <mi>B</mi> <mo>.</mo> <mi>F</mi> </mrow> <mo>)</mo> </mrow> </mrow> </semantics> </math> </inline-formula> over an equivalent spherical steel pressure hull was computed for carbon/epoxy. Moreover, carbon/epoxy displayed larger decreases in buoyancy factor <inline-formula> <math display="inline"> <semantics> <mrow> <mrow> <mo>(</mo> <mrow> <mi>B</mi> <mo>.</mo> <mi>F</mi> </mrow> <mo>)</mo> </mrow> </mrow> </semantics> </math> </inline-formula> in the case of 4 out of a total of 5 lay-up arrangements. The collapse depth decreased from 517.95 m to 412.596 m for a 5 mm lowest mode imperfection. Similarly, the collapse depth decreased from 522.39 m to 315.6018 for a 5 mm worst mode imperfection. |
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| spelling | doaj.art-23f3347bd6864091901822257c27c8d42023-11-20T01:49:56ZengMDPI AGMaterials1996-19442020-05-011311243910.3390/ma13112439Design Optimization and Non-Linear Buckling Analysis of Spherical Composite Submersible Pressure HullMuhammad Imran0Dongyan Shi1Lili Tong2Hafiz Muhammad Waqas3Riaz Muhammad4Muqeem Uddin5Asghar Khan6College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, ChinaCollege of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, ChinaCollege of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, ChinaCollege of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, ChinaDepartment of Mechanical Engineering, College of Engineering, University of Bahrain, Zallaq 1054, Kingdom of BahrainPakhtunkhwa Energy Development Organization (PEDO), Peshawar 25000, PakistanCollege of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, ChinaThis paper describes an optimization study of a spherical composite submersible pressure hull employing a genetic algorithm (GA) in ANSYS. A total of five lay-up arrangements were optimized for three unidirectional composites carbon/epoxy, glass/epoxy, and boron/epoxy. The minimization of the buoyancy factor <inline-formula> <math display="inline"> <semantics> <mrow> <mrow> <mo>(</mo> <mrow> <mi>B</mi> <mo>.</mo> <mi>F</mi> </mrow> <mo>)</mo> </mrow> </mrow> </semantics> </math> </inline-formula> was selected as the design optimization objective. The Tsai-Wu and Tsai-Hill failure criteria and buckling strength factor <inline-formula> <math display="inline"> <semantics> <mrow> <mrow> <mo>(</mo> <mi>λ</mi> <mo>)</mo> </mrow> </mrow> </semantics> </math> </inline-formula> were used as the material failure and instability constraints. To determine the effect of geometric non-linearity and imperfections on the optimized design, a non-linear buckling analysis was also carried out for one selected optimized design in ABAQUS. The non-linear buckling analysis was carried out using the modified RIKS procedure, in which the imperfection size changed from 1 to 10 mm. A maximum decrease of 65.937% in buoyancy factor <inline-formula> <math display="inline"> <semantics> <mrow> <mrow> <mo>(</mo> <mrow> <mi>B</mi> <mo>.</mo> <mi>F</mi> </mrow> <mo>)</mo> </mrow> </mrow> </semantics> </math> </inline-formula> over an equivalent spherical steel pressure hull was computed for carbon/epoxy. Moreover, carbon/epoxy displayed larger decreases in buoyancy factor <inline-formula> <math display="inline"> <semantics> <mrow> <mrow> <mo>(</mo> <mrow> <mi>B</mi> <mo>.</mo> <mi>F</mi> </mrow> <mo>)</mo> </mrow> </mrow> </semantics> </math> </inline-formula> in the case of 4 out of a total of 5 lay-up arrangements. The collapse depth decreased from 517.95 m to 412.596 m for a 5 mm lowest mode imperfection. Similarly, the collapse depth decreased from 522.39 m to 315.6018 for a 5 mm worst mode imperfection.https://www.mdpi.com/1996-1944/13/11/2439optimizationgenetic algorithmcomposite spherical pressure hullstatic structural analysisbuckling analysiscollapse depth |
| spellingShingle | Muhammad Imran Dongyan Shi Lili Tong Hafiz Muhammad Waqas Riaz Muhammad Muqeem Uddin Asghar Khan Design Optimization and Non-Linear Buckling Analysis of Spherical Composite Submersible Pressure Hull Materials optimization genetic algorithm composite spherical pressure hull static structural analysis buckling analysis collapse depth |
| title | Design Optimization and Non-Linear Buckling Analysis of Spherical Composite Submersible Pressure Hull |
| title_full | Design Optimization and Non-Linear Buckling Analysis of Spherical Composite Submersible Pressure Hull |
| title_fullStr | Design Optimization and Non-Linear Buckling Analysis of Spherical Composite Submersible Pressure Hull |
| title_full_unstemmed | Design Optimization and Non-Linear Buckling Analysis of Spherical Composite Submersible Pressure Hull |
| title_short | Design Optimization and Non-Linear Buckling Analysis of Spherical Composite Submersible Pressure Hull |
| title_sort | design optimization and non linear buckling analysis of spherical composite submersible pressure hull |
| topic | optimization genetic algorithm composite spherical pressure hull static structural analysis buckling analysis collapse depth |
| url | https://www.mdpi.com/1996-1944/13/11/2439 |
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