Deformation of composite plates with a layer of aging materials

Abstract

Abstract The paper presents a calculation of the stress-strain state of composite plates. The mathematical model obtained by the authors earlier has been applied. In contrast to the previous results, the viscous-elastic properties of the material are taken into account in describing the behavior of the intermediate layer. The developed creep kernel of the layer material contains the expression that serves to describe the properties of the aging material. The compliance of the proposed formulas with actual processes has been proved by comparison with experimental data. In the numerical implementation decomposition of the expressions under integral sign into the Maclaurin series has been used. Based on the experimental data, the parameters of creep kernels have been determined. The parameters have been determined by minimizing the calculated data standard deviation from the experimental ones. The algorithm based on the random search method has been implemented. The results of the calculation according to the developed mathematical model have been given. The analysis of time variation in the stress-strain state of the joints between the layers of the composite structure has also been given.