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

2019-01-01
Cavdar, F. Yildiz
Bilal, Halil
Güllü, Ramazan
Güler, Birtan
Ciğeroğlu, Ender
Cavdar, Kadir
Solmaz, Erol
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.
Materialpruefung/Materials Testing

Suggestions

Axisymmetric finite cylinder with one end clamped and the other under uniform tension containing a penny-shaped crack
KAMAN, METE ONUR; Gecit, Mehmet Rusen (Elsevier BV, 2008-09-01)
This study considers the axisymmetric analysis of a finite cylinder containing a penny-shaped transverse crack. Material of the cylinder is assumed to be linearly elastic and isotropic. One end of the cylinder is bonded to a fixed support while the other end is subjected to uniform axial tension. Solution is obtained by superposing the solutions for an infinite cylinder loaded at infinity and an infinite cylinder containing four cracks and a rigid inclusion loaded along the cracks and the inclusion. When th...
Comparison of magnetic Barkhausen noise and ultrasonic velocity measurements for microstructure evaluation of SAE 1040 and SAE 4140 steels
Gür, Cemil Hakan; Çam, İbrahim (Elsevier BV, 2007-05-01)
The aim of this study is to compare the performance of magnetic Barkhausen noise and ultrasonic methods for the evaluation of the microstructure of commercial steels. Following the austenitization of the specimens made of SAE 1040 and SAE 4140, various heat treatments were carried out to obtain microstructures consisting of martensite, tempered martensite, fine pearlite-ferrite, and coarse pearlite-ferrite. The microstructures were initially characterized by SEM investigation and hardness measurements. The ...
Analysis of tempering treatment on material properties of DIN 41Cr4 and DIN 42CrMo4 steels
Bayrak, Mustafa; Ozturk, Fahrettin; Demirezen, Mehmet; Evis, Zafer (Springer Science and Business Media LLC, 2007-10-01)
DIN 41Cr4 and DIN 42CrMo4 materials have been widely used in automotive driving elements. Although 42CrMo4 is more expensive than 41Cr4, it is more preferable in terms of material properties. In this study, these two materials were heat treated by austenitizing in a continuous furnace at 850 degrees C and quenched in oil at 90 degrees C. After they were tempered at various temperatures, mechanical properties were determined for each tempering temperature. The material properties for both materials were comp...
Method for Dynamic Material Property Characterization of Soft-Tissue-Mimicking Isotropic Viscoelastic Materials Using Fractional Damping Models
Martin, Bryn A.; Kutluay, Umit; Yazıcıoğlu, Yiğit (ASTM International, 2013-09-01)
Characterization of the mechanical properties of human-tissue-mimicking silicone elastomers is important for producing accurate tissue models for experimentation. However, the viscoelastic and frequency-dependent material properties of elastomers are difficult to quantify. We present a material characterization technique for a silicone elastomer used to mimic human soft tissue based on generalized-Maxwell-type material models with and without fractional dissipating mechanisms. The silicone specimens were pr...
Evaluation of elastomeric bearing performance at low temperatures
Yakut, Ahmet (American Society of Civil Engineers (ASCE), 2002-08-01)
Recent studies on elastomeric bearings led to changes in the design specifications, which tend to indicate that bearings fabricated in the past, would fail the current test requirements. This is contrary to the fact that there have been no reported problems of poor bearing performance in low-temperature regions. AASHTO requires low-temperature tests to determine the change in the shear modulus, which is limited to a certain value. This criterion does not adequately address the performance of the bearings, b...
Citation Formats
F. Y. Cavdar et al., “Setup for testing the vibration-based loosening of pre-loaded bolted joints,” Materialpruefung/Materials Testing, pp. 981–985, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/34738.