Composite stiffened shell optimization under axial compression loading
The technology of composite materials has experienced a rapid development in the last two decades. The reasons and motivations for this development are: significant progress in materials science and technology in the area of fibers, polymers; requirements for high performance materials in aircraft and aerospace structures; and development of powerful and sophisticated numerical methods for structural analysis using modern computer technology and the availability of powerful desk-top computers for the engineering community. Data obtained by the finite element simulation has been employed to build the shell models. Different variants of stiffened shells have been calculated. The design parameters are taken according to the points of experimental design. Since the minimum weight design problem is with buckling and post-buckling constraints has been solved, 4 constraints determine domain of interest the result for optimum design is found. But since buckling and post-buckling constraints are taken according to experimental design from and geometric parameters, the designer can use the results of that work in the interest to find optimum design for the shell which is need to be designed with corresponding geometric characteristics. Composite laminated structures have become very attractive by virtue of their high stiffness and strength-to-weight ratios, long fatigue life. The initial driving force in the technology of composite materials development is weight saving of structures, what provides lower tooling costs, reduced number of parts, and fewer assembly operations, reduces life cycles costs. The present investigation of stiffened composite laminated shells under axial compression loading in buckling and postbuckling structure behavior research requires complex research. The finite element software codes ANSYS and LS-DYNA are employed to make available the simulation of stiffened composite laminated shells and as the basis of simulation Huges-Lui Shell theory is used.
Source (journal)
R_gas Tehnisk_s universit_tes zin_tniskie raksti
5 (2004) , p. 156-165
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Creation 20.11.2018
Last edited 06.11.2023
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