Theoretical and experimental investigation of performance characteristics and design aspects of cross-spring pivots. (1st March 2020)

• Record Type: Journal Article
• Authors: Gonçalves Junior, L.A.; Theska, R.; Lepikson, H.A.; Ribeiro Junior, A.S.; Linß, S.; Gräser, P.
• Is Part Of: International journal of solids and structures. Volume 185/186(2020)
• Page Start: 240
• Page End: 256
• Publication Date: 2020-03-01
• Subjects: Cross-spring pivot -- Analytical modeling -- Anticlastic curvature -- Finite element analysis -- Experimental investigation; Mechanics, Applied -- Periodicals; Structural analysis (Engineering) -- Periodicals; Elastic solids -- Periodicals; Mécanique appliquée -- Périodiques; Constructions, Théorie des -- Périodiques; Solides élastiques -- Périodiques; Elastic solids; Mechanics, Applied; Structural analysis (Engineering); Periodicals; 624.18
• DOI: 10.1016/j.ijsolstr.2019.08.023
• Languages: English
• ISSNs: 0020-7683

Abstract

Abstract: Cross-spring pivots have been widely employed over the last decades in a broad variety of precision engineering applications due to the high motion repeatability achieved thanks to the absence of stick slip and clearance. In this paper, the non-linear effect of the anticlastic curvature of the leaf-springs is considered for the accurate analytical modeling of the elasto-kinematic behavior of cross-spring pivots. Finite element analyses (FEA), based on a non-linear thin-shell model, are carried out in order to compare them with the analytical results for the main performance parameters of this type of device, i.e. center-shift, rotational stiffness and stress in the leaf-springs. Furthermore, an experimental setup is built to assess the applicability limits of both models. Finally, remarkable performance aspects of cross-spring pivots are discussed aiming for design improvements.