Abstract
An approach to multiscale modeling of damage and fracture of a composite overwrapped pressure vessel based on experimental studies is presented. The proposed approach takes into account the interaction of mechanical properties and structural parameters of the composite material at each scale level and their joint interaction. A micromodel of the fracture of a composite material has been developed taking into account the structural features. Calculated mechanical and strength properties of unidirectional composite material are determined. A mesomodel of fracture of a layered composite material is presented for numerical three-point flexural tests. Experimental verification of the numerical mesomodel of straining and fracture of a layered composite material has been carried out. A comparative analysis of the experimental data and numerical modeling showed the quantitative and qualitative agreement of the results. A macromodel of damage and fracture of a composite overwrapped pressure vessel is presented. The diagrams of progressive damage in a composite shell depending on the mode of fracture are presented. An assessment of the strength of the vessel structure is given taking into account the initiation and evolution of damage in the composite shell.
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