Proceedings of the KSME Conference (대한기계학회:학술대회논문집)
- 2001.11a
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- Pages.746-752
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- 2001
Design Sensitivity Analysis of Elasto-perfectly-plastic Structure for Stiffened Shell Structure
탄성-완전-소성 보강쉘 구조물의 설계민감도해석
- Published : 2001.11.01
Abstract
Design sensitivity analysis for nonlinear structural problems has been emerged in the last decade as a glowing area of engineering research. As a result, theoretical formulations and computational algorithms have already developed for design sensitivity of nonlinear structural problems. There is not enough research for practical nonlinear problems using multi-element, due to difficulties of implementation into FEA. Therefore, nonlinear response analysis for stiffened shell which consists of Mindlin plate and Timoshenko beam, was considered. Specially, it presents the backward-Euler method which is adopted to describe an exact yield state in the stress computation procedure. Then, design sensitivity analysis of nonlinear structures, particularly elasto-perfectly-plastic structure, is developed using direct differentiation method. The accuracy of the developed sensitivity analysis was compared with the central finite difference method. Finally, on the basis of above results, design improvement for stiffened shell is suggested.
Keywords
- Design Sensitivity Analysis;
- Elasto-perfectly-plastic materials;
- Incremental equilibrium equation;
- Flow rule;
- Yield criterion
- 설계민감도해석;
- 탄성-완전-소성 재료;
- 증분평형방정식;
- 유동법칙;
- 항복기준;