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M. Shimoda¹ and M. Yonekura²

¹Department of Advanced Science and Technology, Toyota Technological Institute, Nagoya, Japan
²Graduate School of Toyota Technological Institute, Nagoya, Japan

doi:10.4203/ccp.106.209

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M. Shimoda, M. Yonekura, "Free-form Optimization of Shell Structure subject to Stress Constraints", in , (Editors), "Proceedings of the Twelfth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 209, 2014. doi:10.4203/ccp.106.209

Keywords: optimum design, shape optimization, shell, free-form, lightweight, strength design, H-one gradient method, stress constraint..

Summary

In this paper, a node-based, or a non-parametric solution to the shape optimization problem, is presented, for designing lightweight shell structures with an arbitrary form subject to a strength criterion. The shell is assumed to be freely varied in the out-of-plane direction to the surface. The volume is minimized subjected to the von Mises stress constraint. The local constraint condition of von Mises stress is transformed into the global integral functional for the non-parametric formulation of the strength design problem. The shape sensitivity function and the optimality conditions theoretically derived are applied to the H-one gradient method for shells to obtain the optimal free-form with smoothness. Through design examples it is demonstrated how the proposed solution is effective for the lightweight design of shell structures subject to the stress constraint.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 106 PROCEEDINGS OF THE TWELFTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by: Paper 209 Free-form Optimization of Shell Structure subject to Stress Constraints M. Shimoda¹ and M. Yonekura² ¹Department of Advanced Science and Technology, Toyota Technological Institute, Nagoya, Japan ²Graduate School of Toyota Technological Institute, Nagoya, Japan doi:10.4203/ccp.106.209 purchase the full-text of this paper Full Bibliographic Reference for this paper M. Shimoda, M. Yonekura, "Free-form Optimization of Shell Structure subject to Stress Constraints", in , (Editors), "Proceedings of the Twelfth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 209, 2014. doi:10.4203/ccp.106.209 Keywords: optimum design, shape optimization, shell, free-form, lightweight, strength design, H-one gradient method, stress constraint.. Summary In this paper, a node-based, or a non-parametric solution to the shape optimization problem, is presented, for designing lightweight shell structures with an arbitrary form subject to a strength criterion. The shell is assumed to be freely varied in the out-of-plane direction to the surface. The volume is minimized subjected to the von Mises stress constraint. The local constraint condition of von Mises stress is transformed into the global integral functional for the non-parametric formulation of the strength design problem. The shape sensitivity function and the optimality conditions theoretically derived are applied to the H-one gradient method for shells to obtain the optimal free-form with smoothness. Through design examples it is demonstrated how the proposed solution is effective for the lightweight design of shell structures subject to the stress constraint. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
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