Nonlinear Characteristic of Spherical Joints with Clearance
Joints in deployable structures can degrade the stiffness and the stability of spacecraft. In this study, the nonlinear stiffness of spherical joints is investigated. The traditional contact model of spherical joints based on non-conforming contact assumption is presented. A new contact model for sp...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Instituto de Aeronáutica e Espaço (IAE)
2015-05-01
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| Series: | Journal of Aerospace Technology and Management |
| Subjects: | |
| Online Access: | https://www.jatm.com.br/jatm/article/view/464 |
| _version_ | 1828259990016622592 |
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| author | Jing Zhang Hong-wei Guo Rong-qiang Liu Zong-quan Deng |
| author_facet | Jing Zhang Hong-wei Guo Rong-qiang Liu Zong-quan Deng |
| author_sort | Jing Zhang |
| collection | DOAJ |
| description | Joints in deployable structures can degrade the stiffness and the stability of spacecraft. In this study, the nonlinear stiffness of spherical joints is investigated. The traditional contact model of spherical joints based on non-conforming contact assumption is presented. A new contact model for spherical joints based on the Winkler model and geometric constraints is established to calculate the stiffness of spherical joints with small clearances. The finite element model (FEM) of spherical joints is built to evaluate the accuracy of the theoretical model. The effects of the clearance and the contact force of spherical joints on the deformation of joints are investigated. When compared with FEM results, the error of the new spherical model is smaller than that of the traditional contact model when the clearance of spherical joint is not excessively large. The new contact model for spherical joint is more accurate than the traditional contact model when the clearance of spherical joint is large. |
| first_indexed | 2024-04-13T03:17:34Z |
| format | Article |
| id | doaj.art-7cf96e87de754aa8a59c40b8f622cf43 |
| institution | Directory Open Access Journal |
| issn | 2175-9146 |
| language | English |
| last_indexed | 2024-04-13T03:17:34Z |
| publishDate | 2015-05-01 |
| publisher | Instituto de Aeronáutica e Espaço (IAE) |
| record_format | Article |
| series | Journal of Aerospace Technology and Management |
| spelling | doaj.art-7cf96e87de754aa8a59c40b8f622cf432022-12-22T03:04:53ZengInstituto de Aeronáutica e Espaço (IAE)Journal of Aerospace Technology and Management2175-91462015-05-0172Nonlinear Characteristic of Spherical Joints with ClearanceJing ZhangHong-wei GuoRong-qiang LiuZong-quan DengJoints in deployable structures can degrade the stiffness and the stability of spacecraft. In this study, the nonlinear stiffness of spherical joints is investigated. The traditional contact model of spherical joints based on non-conforming contact assumption is presented. A new contact model for spherical joints based on the Winkler model and geometric constraints is established to calculate the stiffness of spherical joints with small clearances. The finite element model (FEM) of spherical joints is built to evaluate the accuracy of the theoretical model. The effects of the clearance and the contact force of spherical joints on the deformation of joints are investigated. When compared with FEM results, the error of the new spherical model is smaller than that of the traditional contact model when the clearance of spherical joint is not excessively large. The new contact model for spherical joint is more accurate than the traditional contact model when the clearance of spherical joint is large.https://www.jatm.com.br/jatm/article/view/464Deployable structureNonlinear characteristicJointStiffness |
| spellingShingle | Jing Zhang Hong-wei Guo Rong-qiang Liu Zong-quan Deng Nonlinear Characteristic of Spherical Joints with Clearance Journal of Aerospace Technology and Management Deployable structure Nonlinear characteristic Joint Stiffness |
| title | Nonlinear Characteristic of Spherical Joints with Clearance |
| title_full | Nonlinear Characteristic of Spherical Joints with Clearance |
| title_fullStr | Nonlinear Characteristic of Spherical Joints with Clearance |
| title_full_unstemmed | Nonlinear Characteristic of Spherical Joints with Clearance |
| title_short | Nonlinear Characteristic of Spherical Joints with Clearance |
| title_sort | nonlinear characteristic of spherical joints with clearance |
| topic | Deployable structure Nonlinear characteristic Joint Stiffness |
| url | https://www.jatm.com.br/jatm/article/view/464 |
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