Fundamentals of force-controlled friction riveting

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2018-12-07
Major/Subject
Mcode
Degree programme
Language
en
Pages
Series
Materials, Volume 11, issue 12
Abstract
The present work investigates the correlation between energy efficiency and global mechanical performance of hybrid aluminum alloy AA2024 (polyetherimide joints), produced by force-controlled friction riveting. The combinations of parameters followed a central composite design of experiments. Joint formation was correlated with mechanical performance via a volumetric ratio (0.28-0.66 a.u.), with a proposed improvement yielding higher accuracy. Global mechanical performance and ultimate tensile force varied considerably across the range of parameters (1096-9668 N). An energy efficiency threshold was established at 90 J, until which, energy input displayed good linear correlations with volumetric ratio and mechanical performance (R-sq of 0.87 and 0.86, respectively). Additional energy did not significantly contribute toward increasing mechanical performance. Friction parameters (i.e., force and time) displayed the most significant contributions to mechanical performance (32.0% and 21.4%, respectively), given their effects on heat development. For the investigated ranges, forging parameters did not have a significant contribution. A correlation between friction parameters was established to maximize mechanical response while minimizing energy usage. The knowledge from Parts I and II of this investigation allows the production of friction riveted connections in an energy efficient manner and control optimization approach, introduced for the first time in friction riveting.
Description
Keywords
Friction, Hybrid structures, Joining, Response surface, Riveting
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Citation
Cipriano , G P , Blaga , L A , dos Santos , J F , Vilaça , P & Amancio-Filho , S T 2018 , ' Fundamentals of force-controlled friction riveting : Part II-Joint global mechanical performance and energy efficiency ' , Materials , vol. 11 , no. 12 , 2489 . https://doi.org/10.3390/ma11122489