The minimum weight of sandwich construction which is regarded as objective.function has been discussed. Under given constraint condition of the strength or the stiffness. the four optimum parameters of sandwich construction with honeycomb core (thickness of the face t t , thickness of the honeycomb core hc , thickness of the honeycomb wall I~ , side lengih of the honeycomb cell c ) are evaluated. By using constraint condition of :he strength, a equation of high degree is finally solved. In the constraint condition of the stiffness, the constraint optimization problem is treated as inconstraint optimization problem with the method of obtaining extreme value solution by undetermined parameter multiplication. Als.o, the results are discussed.
In this paper, the conclusion that the experimental results coincide with theoretical analysis has been got through buckling test of 283 composite rectangular plates. It is confirmed thai the critical loads of composite plates calculated by bucklh N theoretical formula of anisotropic plate are reliable. The selections of optimal content of matrix and optimal off-axis which make fiber reinforced composite plates reach biggest critical loads are also discussed in this paper. The result of analysis may be used in the design for the products.
In this paper, based on the experimental and theoretical arlaiysis, the principle of optimum design for singic lap joint of resin matrix, together with wmposites is presented, the adhesive selection, the bonding length and the .hickness of the adhesive layer and the adherend design. II is shown that by the optimum desigtl the strength of adhesive bonding is increased while the weight of the composites products is decreased so that the qtralitl of the products is improved.
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