Fuzzy reliability-based optimum design of laminated composites
In conventional reliability-based optimum design of structures, the reliability is computed based on the probability assumption, and the design objective and constraint are considered as deterministic ones. In many cases, however, there exist some fuzzy factors in the design objective and constraint functions. In this paper, the fuzzy reliability and fuzzy constraint are introduced to establish the fuzzy reliability-based optimum model for laminated composites. The examples show that the method developed in this paper can give consideration to both the reliability demand and the economic aspect of a structure. Since the fuzzy reliability-based optimum design is a ‘soft’ design, the present results provide a new methodology for the effective evaluation of structural reliability and bring us an alternative optimum design idea.
Key wordsfuzzy reliability fuzzy constraint the best safety level fuzzy synthetic evaluation
Unable to display preview. Download preview PDF.
- Wang, X.Y. and Chen, J.Q., Robust optimum design of laminated composite plates. Acta Mechanica Solida Sinica, 2004, Vol.17, No.4: 315–322.Google Scholar
- Lei, W., Tong, L.S. and Yang, H., Fuzzy optimization of an electron optical lens. Nuclear Instruments and Methods in Physics Research A, 1995, Vol.365: 367–370.Google Scholar
- Wei, J.H., Chen, J.Q. and Xu, Y.R., Profust reliability of laminated composites. Acta Mechanica Solida Sinica, 2005, Vol.18, No.3: 297–302 (in Chinese).Google Scholar
- Huang, H.Z., The basic concept and solution idea of fuzzy optimum design. Mechanical Design, 1996, Vol.12: 53–55 (in Chinese).Google Scholar