Open Access

ARTICLE

Identification of Composite-Metal Bolted Structures with Nonlinear Contact Effect

Mohammad Ghalandari¹, Ibrahim Mahariq², Majid Pourghasem³, Hasan Mulki², Fahd Jarad^4,5,*

1 Department of Aerospace Engineering, Sharif University of Technology, Tehran, Iran
2 College of Engineering and Technology, American University of the Middle East, Kuwait
3 Faculty of Mechanical and Mechatronics Engineering, IHU, Tehran, Iran
4 Department of Mathematics, Cankaya University, Etimesgut, Ankara, Turkey
5 Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan

* Corresponding Author: Fahd Jarad. Email:

Computers, Materials & Continua 2022, 70(2), 3383-3397. https://doi.org/10.32604/cmc.2022.020245

Received 17 May 2021; Accepted 02 July 2021; Issue published 27 September 2021

Abstract

The middle layer model has been used in recent years to better describe the connection behavior in composite structures. The 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 structure. Therefore, 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 investigated. Due 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 conducted. In 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 direction. Nonlinear 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 connection. 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 extracted. The 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 represented. The comparison results show good agreement with a maximum of 1.33% error.

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