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Bending degradation of thin-walled box beams made of aluminum omega profile and GFRP panel connected by mechanical fasteners

机译：Bending degradation of thin-walled box beams made of aluminum omega profile and GFRP panel connected by mechanical fasteners

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摘要

The paper presents the results of laboratory tests and numerical simulations for thin-walled beams subjected to 3point bending (3-PB). The beams were made of two parts: an aluminum (7075) omega profile and a GFRP (glass fiber reinforced plastic) panel, which were connected by rivets. The paper focuses on the analysis of deformation states and gradual degradation in these elements. The modeling is described by parameters as the number of rivets, the height of the aluminum profile, and the stiffness of the composite which strongly influence the failure force. The experiments were carried out for two settings of beams on supports, in which the composite panel was located on the side of the supports or on the side of the load acting on the beam axis. The laboratory tests allowed to confirm the correctness of the numerical model. As a result of numerical simulations, the most optimal material and geometric configuration were determined, taking into account the maximum carrying criterion force at 3-PB. The effort of the composite material was also analyzed based on the Tsai-Hill hypothesis.

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