A numerical study on the deployment pressure (the minimum internal pressure bringing a construction from the packed state to the operational one) of large laminated CFRP shell structures is performed using the ANSYS engineering package. The shell resists both membrane and bending deformations. Structures composed of shell elements whose median surface has an involute are considered. In the packed (natural) states of constituent elements, the median surfaces coincide with their involutes. Criteria for the termination of stepwise solution of the geometrically nonlinear problem on determination of the deployment pressure are formulated, and the deployment of cylindrical, conical (full and truncated cones), and large-size composite shells is studied. The results obtained are shown by graphs illustrating the deployment pressure in relation to the geometric and material parameters of the structure. These studies show that large pneumatic composite shells can be used as space and building structures, because the deployment pressure in them only slightly differs from the excess pressure in pneumatic articles made from films and soft materials.
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This study was financially supported by the Russian Fund for Basic Research (grants No. 12-08-00970_a and 14-08-96011_r_ural_a).
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Translated from Mekhanika Kompozitnykh Materialov, Vol. 51, No. 5, pp. 889-898 , September-October, 2015.
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Pestrenin, V.M., Pestrenina, I.V., Rusakov, S.V. et al. Deployment of Large-Size Shell Constructions by Internal Pressure. Mech Compos Mater 51, 629–636 (2015). https://doi.org/10.1007/s11029-015-9532-5
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DOI: https://doi.org/10.1007/s11029-015-9532-5