ABOUT STRESSED DEFORMED CONDITION OF FLEXIBLE PAVEMENT WITH CRACK

Paper shows the results for construction of mathematical model for multilayer pavement structure, in one layer of which the single vertical crack is initiated. During problem solving for mechanics of solid deformed body, to which the problem of stressed deformed condition of multilayer pavement relates, one can use program complex ANSYS, which showed itself to good advantage in world practice, where finite element method is used. However, the availability of cracks of various length and spatial orientation makes the use of ANSYS not very efficient, as at variations of geometrical parameters for cracks, it is required to introduce changes into leading program, which is not very convenient to make in the program on ANSYS, as many operations have been performed secretly from the researcher. Based on the above JSC “KazdorNII” has developed the calculation program BASIC_MKE in terms of MATLAB. As the singularity is available in crack points, calculations should be made with high accuracy, for that reason quadratic elements with eight nodes have been used in the developed program. To imitate the availability of a single crack the imaginary void is introduced into calculation scheme with initial zero area, which allows considering of adhesion conditions between asphalt concrete layer with crack and underlying gravel layer. For approbation of the created calculation program, the formulated problem is solved in parallel in program complex ANSYS, and components of tensor deformation, obtained by two programs, are compared among themselves. Comparison of the results for problem solution according to program BASIC_MKE with the results of solution of the same problem according to program in ANSYS shows that the developed calculation program in terms of MATLAB is functionally operative.