caa a22 4500 46791382X CHVBK 20180406152856.0 cr unu---uuuuu 170328e20061201xx s 000 0 eng 10.1007/s10999-007-9047-x doi (NATIONALLICENCE)springer-10.1007/s10999-007-9047-x Investigation into cylinder-on-flat adhesion elastic-plastic micro-contact under repeated loading and unloading condition [Elektronische Daten] [V. Sabelkin, S. Mall] The evolution of microcontact induced deformation and stress states under repeated loading and unloading condition is of great interest for the scientific understanding as well as from the engineering design considerations of microelectromechanical systems (MEMS) based switches and similar other devices since they operate under cyclic condition. This study, therefore, investigated the microcontact interaction between deformable smooth cylindrical segment and deformable smooth flat using the finite element analysis. Elastic and elastic-plastic material behaviors and adhesion interaction are considered. The detailed information about contact area, displacement and stress state in the contact region under cycling condition are presented. Contact area varies nonlinearly even when the applied load is varying linearly in a cycle. Additionally, contact areas during loading and unloading portions of a cycle are not equal at the same load level. The deformation and contact area increases in the presence of adhesion force and also with elastic-plastic material behavior. However, the adhesion force is reduced while the contact area is increased during the microcontact between elastic-plastic bodies in comparison to those between elastic bodies. The maximum increase in stress and deformation states occurs during the first cycle, and then slowly with increasing number of cycles. Further, the maximum stress state is not at the contact surface and also not at instant of the maximum applied external force. Finally, adhesion force during microcontact interaction can be of the same order as the applied external force. Therefore, design and analysis of microcontacts in micromechanical switches and similar other devices should include the effects of adhesion force and cyclic effects. Springer Science+Business Media B.V., 2007 Adhesion nationallicence Cylinder-on-flat contact nationallicence Elastic-plastic nationallicence Fatigue nationallicence Microcontact nationallicence a : Half contact width nationallicence A cont : Contact area nationallicence A max : Maximum contact area nationallicence b : Upper cylindrical body half width nationallicence B : Location on the lower body nationallicence COF : Coefficient of friction nationallicence DOF : Degree of freedom nationallicence D o : Intermolecular distance nationallicence E : Modulus of elasticity nationallicence E P : Modulus of linear hardening portion nationallicence F adh : Adhesion force nationallicence FEA : Finite element analysis nationallicence F ext : External force nationallicence L : Thickness nationallicence MEMS : Microelectromechanical system nationallicence MPC : Multipoint constraint nationallicence n 1, n 2 : Integer-valued exponents nationallicence P : Actual load nationallicence p max : Maximum applied pressure nationallicence P max : Maximum load nationallicence P min : Minimum load nationallicence P tot : Total applied force nationallicence p ( y ) : Adhesion pressure nationallicence R : Radius of cylindrical body nationallicence RF : Radio frequency nationallicence S 11 : Longitudinal stress along x axis nationallicence S 11 max : Maximum longitudinal stress nationallicence S 22 : Transverse normal stress along y axis nationallicence w 12 : Energy of adhesion nationallicence x , y , z : Coordinates nationallicence y B : Displacement at location B nationallicence Δ A cont : Contact area difference between loading and unloading parts of cycle nationallicence μ : Coefficient of friction nationallicence ν : Poisson's ratio nationallicence σ s : Yield strength nationallicence Sabelkin V. Department of Aeronautics and Astronautics, Air Force Institute of Technology (AFIT/ENY), Bldg. 640, 2950 Hobson Way, 45433-7765, Wright-Patterson Air Force Base, OH, USA aut Mall S. Department of Aeronautics and Astronautics, Air Force Institute of Technology (AFIT/ENY), Bldg. 640, 2950 Hobson Way, 45433-7765, Wright-Patterson Air Force Base, OH, USA aut International Journal of Mechanics and Materials in Design Springer Netherlands 3/4(2006-12-01), 373-388 1569-1713 3:4<373 2006 3 10999 https://doi.org/10.1007/s10999-007-9047-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10999-007-9047-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sabelkin V. Department of Aeronautics and Astronautics, Air Force Institute of Technology (AFIT/ENY), Bldg. 640, 2950 Hobson Way, 45433-7765, Wright-Patterson Air Force Base, OH, USA aut NATIONALLICENCE 700 1- Mall S. Department of Aeronautics and Astronautics, Air Force Institute of Technology (AFIT/ENY), Bldg. 640, 2950 Hobson Way, 45433-7765, Wright-Patterson Air Force Base, OH, USA aut NATIONALLICENCE 773 0- International Journal of Mechanics and Materials in Design Springer Netherlands 3/4(2006-12-01), 373-388 1569-1713 3:4<373 2006 3 10999 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer