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Setup for testing the vibration-based loosening of pre-loaded bolted joints

  • F. Yildiz Cavdar , Halil Bilal , Ramazan Güllü , Birtan Güler , Ender Cigeroglu , Kadir Cavdar and Erol Solmaz
From the journal Materials Testing

Abstract

In this study, a test setup was designed and manufactured in order to study vibration based self-loosening characteristics of preloaded bolted joints, especially used in the automobile industry. Details of the designed test setup and its operating principles are presented in addition to the test setups available in the literature. Using the test system developed and implementing a design of experiments procedure, first trials were conducted by using the test setup. Under predefined conditions, it is possible to identify when theloosening of bolts occurs and what tightening moment value is required to prevent self-loosening.


Correspondence Address, Dr. Halil Bilal, TOFAS Turk Otomobil Fabrikasi A. S., Bursa Uludag University, Institute of Science, Bursa, Turkey, E-mail: ,

Dipl.-Ing. Fatma Yildiz Cavdar, born in 1971, received her BSc and MSc degrees in Mechanical Engineering at the University of Uludag, Bursa, Turkey in 1993 and 1995, respectively. She has worked on a research project in Germany at the Technical University of Brunswick in 1996. She is currently a Ph.D. student at the Institute of Science, Mechanical Engineering Department at Bursa Uludag University, Turkey. She also works as General Manager at FCB R&D Company, Bursa, Turkey.

Mech. Eng. Halil Bilal, born in 1976, completed his studies in Mechanical Engineering at Anadolu University, Eskişehir, Turkey. He received his Msc at Uludağ University, Bursa. He is currently a Ph.D. student at the Institute of Science, Automotive Engineering Department at Bursa Uludag University. In 1996, he started working as a Virtual Analyses Engineer. After 5 years, he joined the Fiat-Chrysler Automobiles Turkey plant in Bursa. Since 2016 he has been working as Senior Technical Specialist of finite element analysis. His main fields of interest are durability, strength, computer programming and optimization.

Mech. Eng. Ramazan Güllü, born in 1986, finished his studies of Mechanical Engineering at BAU, Turkey and started working at Altair Turkey as a Structural Virtual Analyses Engineer. Subsequently, he worked at an aluminum car parts producer as a Finite Element Analyst and developed aluminum crash traverses for an Italian automobile supplier. Currently he has been working for Fiat-Chrysler Automobiles Turkey in Bursa as a System Engineer managing structural, NVH and safety calculations for vehicle body and interior parts.

Mech. Eng. Birtan Güler, born in 1990, graduated in Mechanical Engineering at Ege University, Izmir. He received his M.Sc at the Izmir Institute of Technology writing on the self-loosening of fasteners. He is currently a Ph.D. student at the Institute of Science, Automotive Engineering Department at Bursa Uludag University, Turkey. In 2014 he worked as a Fastener Development Engineer at Norm Fasteners in İzmir. Subsequently, he worked for Fiat-Chrysler Automobiles Turkey as a Design Specialist. since 2018 he has been working as an Engineering Specialist for Fasteners in Bursa, Turkey. His main fields of interest are bolted joints behavior, the self-loosening of fasteners, the fastener tightening process and statistical process control (SPC).

Dr. Ender Cigeroglu, born in 1976, completed his BS and MSc studies at the Department of Mechanical Engineering at METU, Ankara, Turkey and obtained his MSc and PhD degrees from the Department of Mechanical Engineering at Ohio State University, Columbus OH, USA. He started working as a faculty member in the Department of Mechanical Engineering at METU, Ankara, where he is currently a Professor. He also serves as the Assistant Director of the METU-BILTIR Center and is founding Director of Gear Research Center at METU.

Assoc. Prof. Dr. Kadir Cavdar, born in 1969, finished his studies of Mechanical Engineering at Uludag University, Bursa, Turkey and prepared for his PhD-Thesis at the Department of Mechanical Engineering on Noiseless Machines. After an interval as a Lecturer at Uludag University, he founded an R&D firm named FCB in Bursa. At the moment, his research themes are mechatronics, design science theory, ergonomics, some machine elements etc.

Dr. Ing Erol Solmaz, born in 1966, studied mechanical engineering at Uludag University, Bursa, Turkey as of 1988. In 2000, he received his Ph.D. at the same University. Since 2006, he has been a Lecturer in Automotive Engineering in the Engineering Department at Uludag University. His main fields of interest are; powertrains, machine elements, automobile design, computer programming and graduate education.


References

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Published Online: 2019-09-26
Published in Print: 2019-10-02

© 2019, Carl Hanser Verlag, München

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