Multilevel modeling reveals tank strength and service life in high-pressure conditions, suggesting improved safety metrics for aerospace applications.
An approach to multilevel modeling of deformation and fracture of a metal-composite high-pressure tank is proposed. The essence of the approach lies in the application of interrelated numerical models corresponding to different scale levels. At the micro-level in the fiber-matrix system a representative elementary volume of a unidirectional composite material is modeled, for which the mechanical properties and destruction parameters are determined. At the meso-level, a model of an orthotropic layered composite material consisting of unidirectional tapes laid at different angles is considered. At the macro-level the design of a metal-composite tank is modeled, consisting of a metal liner and a multilayer composite shell, taking into account its progressive destruction or creep. The use of experimental results both as input data and for validating deformation and fracture models is a feature of the presented approach. The use of multilevel modeling is demonstrated by the example of calculating the strength and service life of a metal-composite high-pressure tank for space vehicles. Based on the results of the calculation, the failure pressure of the tank under static loading was determined according to the criterion of destruction of a composite shell, as well as the service life of the tank during its creep.
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Eremin et al. (2023) studied this question.
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