Influence of Lubrication Systems on the Fatigue Strength of Bolted Joints
The fatigue behavior of bolted joints is critical to failure for many applications due to the high notch effect. Among other parameters, the lifetime is based on the influence of the surface system, consisting of corrosion protection and lubricant. With the intention of considering the surface syste...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-03-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/12/6/2778 |
| _version_ | 1797473026441216000 |
|---|---|
| author | Fabian Kraemer Michael Stähler Marcus Klein Matthias Oechsner |
| author_facet | Fabian Kraemer Michael Stähler Marcus Klein Matthias Oechsner |
| author_sort | Fabian Kraemer |
| collection | DOAJ |
| description | The fatigue behavior of bolted joints is critical to failure for many applications due to the high notch effect. Among other parameters, the lifetime is based on the influence of the surface system, consisting of corrosion protection and lubricant. With the intention of considering the surface system in the design and dimensioning process of bolted joints, experimental investigations are carried out systematically for an exemplary selected basecoat and various lubricant systems. The basis is given by fatigue tests supported by selected methods of material analysis for the fractographic evaluation. A reproducible method to determine the crack initiation as well as the crack propagation is developed and used for the evaluation of lubricant systems. Defined damage can be reproducibly assigned on the basis of a critical frequency change rate of the resonance test machine. A high durability of the friction in the load-bearing contact (e.g., greases) reduces the stress and delays the crack initiation. Lubricants which are able to creep (e.g., oil) slow down the crack propagation and increase the lifetime, which is proved by a higher number of cycles to failure and an increased fatigue strength. |
| first_indexed | 2024-03-09T20:09:21Z |
| format | Article |
| id | doaj.art-07f485125bfc4cc0bcc1f44bda34ca63 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T20:09:21Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-07f485125bfc4cc0bcc1f44bda34ca632023-11-24T00:19:33ZengMDPI AGApplied Sciences2076-34172022-03-01126277810.3390/app12062778Influence of Lubrication Systems on the Fatigue Strength of Bolted JointsFabian Kraemer0Michael Stähler1Marcus Klein2Matthias Oechsner3Chair and Institute for Materials Technology, Technical University of Darmstadt, Grafenstrasse 2, 64283 Darmstadt, GermanyDörken Coatings GmbH & Co. KG, Wetterstrasse 58, 58313 Herdecke, GermanyChair and Institute for Materials Technology, Technical University of Darmstadt, Grafenstrasse 2, 64283 Darmstadt, GermanyChair and Institute for Materials Technology, Technical University of Darmstadt, Grafenstrasse 2, 64283 Darmstadt, GermanyThe fatigue behavior of bolted joints is critical to failure for many applications due to the high notch effect. Among other parameters, the lifetime is based on the influence of the surface system, consisting of corrosion protection and lubricant. With the intention of considering the surface system in the design and dimensioning process of bolted joints, experimental investigations are carried out systematically for an exemplary selected basecoat and various lubricant systems. The basis is given by fatigue tests supported by selected methods of material analysis for the fractographic evaluation. A reproducible method to determine the crack initiation as well as the crack propagation is developed and used for the evaluation of lubricant systems. Defined damage can be reproducibly assigned on the basis of a critical frequency change rate of the resonance test machine. A high durability of the friction in the load-bearing contact (e.g., greases) reduces the stress and delays the crack initiation. Lubricants which are able to creep (e.g., oil) slow down the crack propagation and increase the lifetime, which is proved by a higher number of cycles to failure and an increased fatigue strength.https://www.mdpi.com/2076-3417/12/6/2778fatigue behaviorsurface influencecrack initiationcrack propagationbolted jointVDI guideline 2230 |
| spellingShingle | Fabian Kraemer Michael Stähler Marcus Klein Matthias Oechsner Influence of Lubrication Systems on the Fatigue Strength of Bolted Joints Applied Sciences fatigue behavior surface influence crack initiation crack propagation bolted joint VDI guideline 2230 |
| title | Influence of Lubrication Systems on the Fatigue Strength of Bolted Joints |
| title_full | Influence of Lubrication Systems on the Fatigue Strength of Bolted Joints |
| title_fullStr | Influence of Lubrication Systems on the Fatigue Strength of Bolted Joints |
| title_full_unstemmed | Influence of Lubrication Systems on the Fatigue Strength of Bolted Joints |
| title_short | Influence of Lubrication Systems on the Fatigue Strength of Bolted Joints |
| title_sort | influence of lubrication systems on the fatigue strength of bolted joints |
| topic | fatigue behavior surface influence crack initiation crack propagation bolted joint VDI guideline 2230 |
| url | https://www.mdpi.com/2076-3417/12/6/2778 |
| work_keys_str_mv | AT fabiankraemer influenceoflubricationsystemsonthefatiguestrengthofboltedjoints AT michaelstahler influenceoflubricationsystemsonthefatiguestrengthofboltedjoints AT marcusklein influenceoflubricationsystemsonthefatiguestrengthofboltedjoints AT matthiasoechsner influenceoflubricationsystemsonthefatiguestrengthofboltedjoints |