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Identification of Composite-Metal Bolted Structures with Nonlinear Contact Effect

Computers, Materials & Continua 2022年第2期70卷 3383-3397页

作者： Mohammad Ghalandari Ibrahim Mahariq Majid Pourghasem Hasan Mulki Fahd Jarad Department of Aerospace Engineering Sharif University of TechnologyTehranIran College of Engineering and Technology American University of theMiddle EastKuwait Faculty of Mechanical and Mechatronics Engineering IHUTehranIran Department of Mathematics Cankaya UniversityEtimesgutAnkaraTurkey Department of Medical Research China Medical University HospitalChina Medical UniversityTaichungTaiwan

The middle layer model has been used in recent years to better describe the connection behavior in composite *** influencing parameters including low pre-screw and high preload have the main effects on nonlinear behavior of the connection as well as the amplitude of the excitation force applied to the ***,in this study,the effects of connection behavior on the general structure in two sections of increasing damping and reducing the stiffness of the structures that lead to non-linear phenomena have been *** to the fact that in composite structure we are faced to the limitation of increasing screw preload which tend to structural damage,so the investigation on the hybrid connection(metal-composite)behavior is *** this research,using the two-dimensional middle layer theory,the stiffness properties of the connection are modeled by normal stiffness and the connection damping is modeled using the structural damping in the shear *** frequency response diagrams have been extracted twice for two different excitation forces and then proposed by a high-order multitasking approximation according to the response range of the nonlinear finite element model for stiffness and damping of the *** effect of increasing the amplitude of the excitation force and decreasing the preload of the screw on the nonlinear behavior of the component has been *** results show that the limited presented novel component model has been accurately verified on the model obtained from the vibration experimental test and the reduction of nonlinear model updating based on that is *** comparison results show good agreementwith a maximumof 1.33%error.

关键词： Nonlinear equation hybrid joint behavior thin laminated element nonlinear frequency response function

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