On the numerical prediction of the torque-to-turn-value of a blind rivet nut
Tóm tắt
In the present paper, finite element simulations are used to gain a better understanding of the setting process of a blind rivet nut. A blind rivet nut is a mechanical fastener capable of clinching materials whilst providing a threaded solution without the need for thread forming. The technique relies on plastic deformation introduced by axial compression of the rivet nut in such a way that a counter head is formed on the opposite side of the work piece. For certain applications, stresses in the plate material induced by the setting process are detrimental for the fastener’s integrity. Hence an improved design of the fastener is desired. To embark on such a redesign, an appropriate numerical model to reveal the influence of several parameters is indispensable. In this work, a strategy is presented to simulate the setting process involving large plastic strains and contact pressures. An FE based inverse method was used to identify the local plastic material properties of the blind rivet nut. The forming simulation was validated in terms of predicted shape of the rivet nut and the evolution of the setting force. A quasi-static FE model using the shape and solution variables of the deformed rivet nut was used to reproduce the torque-to-turn resistance as a function of the setting force. The strategy was successfully applied on two blind rivet nuts, different in geometry and base material. Finally, three industrial case studies confirmed the viability of the model.
Tài liệu tham khảo
Messler R (2004) Joining of Materials and Structures. Elsevier, New York
Aurich JC, Kirsch B, Müller C, Heberger L (2014) Procedia CIRP
Thoppul SD, Finegan J, Gibson RF (2004) Composites Science and Technology
Manes A, Giglio F, Viganò F (2011) International Journal of Mechanical Sciences
Van de Velde A, Coppieters S, Denys K, Maeyens J, Debruyne D (2017) Proceedings of the 20th international ESAFORM conference on material forming
Cheraghi SH (2007) International journal of advanced manufacturing technology
Glackin JJ, Gowen EF, Keeney CJ (1968) Development of fasteners technology for beryllium point drive bolds and blind fasteners. Tech. rep., SPS Laboratories
Wanner MC, Henkel KM, Herzogt P, Fuchs N, Glienke R (2009) Einsatz von blindgenieteten funktionselementen in ausgewählten bauteilwerkstoffen. Tech. rep., Universität Rostock, Fakultät für Maschinenbau und Schiffstechnik
Klasztorny M, Nycs D (2014) Shell Structures: Theory and Applications, vol 3. CRC Press, Chap. Modelling and numerical study of blind rivet nut / bolt joints of composite shell segments
Yoo SY, Kim CH, Kweon JH, Choi JH (2016) Composite structures
MatchID (2016) MatchID software (http://www.matchidmbc.com)
Simulia Abaqus version 6.13
Design G (2017) CES EduPack
Simulia Abaqus anlysis user’s guide 6.11
Denys K, Coppierters S, Cooreman S, Debruyne D (2016) Mechanics of Materials
Coppieters S, Lava P, Sol H, Van Bael A, Van Houtte P, Debruyne D (2010) Determination of the flow stress and contact friction of sheet metal in a multi-layered upsetting test. J Mater Process Technol 210:1290–1296
Coppieters S, Kuwabara T (2014) Identification of Post-Necking Hardening Phenomena in Ductile Sheet Metal. Exp Mech 54:1355 753
(1994) Military Standardization Handbook. Defense Automated Printing Services
Reithmaier LW, Leavell S, Bungay S (1991) Standard aircraft handbook. Blue Ridge Summit
Maeyens J, Reul A, Van Leugenhaeghe S (2018) Blindklinkbevestiger en werkijze voor de productie daarvan Belgium Patent F16B 37/06 - BE1025150