Optimization of a Composite Plate Buckling under Thermal Action with Account of Reliability

Optimization of the structure of a laminated anisotropic composite plate subjected to thermal action is considered. The thermoelastic properties of the laminated composite are determined from the known stochastic properties of the components and the given values of the variable structural parameters, using the method of orientational averaging. The properties to be optimized - the critical load and thermal stresses - depend on two variable parameters, the stochastic properties of the composite and the temperature. In the space of the properties being optimized, the domain of admissible solutions and the parameters of the property scatter ellipses at the characteristic points of the project are found. For the compromise optimum project obtained, the reliability is determined with account of the correlation between the critical and thermal stresses. Reduced requirements to the critical loads and thermal stresses lead to an increase in the reliability of the project.