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Study of Bondura® expanding PIN system : combined axial and radial locking systemAkhtar, Muhammad Maaz ; Karlsen, Øyvind ; Lemu, Hirpa G.Bolted connections are widely used in parallel plates and flanged joints to axially lock using the preload generated by the tightening torque and to constrain radial movements of the flanges by the ... surface friction between mating surfaces. The surface friction depends on the micro-asperities of mating surfaces; under the influence of vibrations and other external radial loads, these asperities tend to deform over time, resulting in the failure of the connection. The Bondura expanding pin system presented in this article is an innovative axial and radial locking system, in which the failure of bolted connections due to radial movements is eliminated by relying on the mechanical strength of the pin system along with the surface friction. The present study describes an experimental design to verify the maximum possible preload on the axial-radial pin at different levels of applied torque. The article also provides a realistic comparison of the pin system with standard bolts in terms of handling axial and radial loads. With some alterations in the axial-radial pin system’s design, the joint’s capability to resist failure improved appreciably compared with the original design and standard bolts with higher preload. As a result, the estimated capability improvement of the joint against the connection failure due to the external radial load by the axial-radial pin is observed to be more than 200 % compared to standard bolts. Considering the pros and cons of both fasteners, i.e., axial-radial pin and standard bolts, a practical solution can be chosen in which both fasteners are used in a connection, and an optimized situation can be developed based on the working conditions.Vir: Strojniški vestnik = Journal of mechanical engineering. - ISSN 0039-2480 (Vol. 67, no. 12, Dec. 2021, str. 625-634)Vrsta gradiva - članek, sestavni delLeto - 2021Jezik - angleškiCOBISS.SI-ID - 94040579
Avtor
Akhtar, Muhammad Maaz |
Karlsen, Øyvind |
Lemu, Hirpa G.
Teme
axial locking |
expanding pin system |
bolt preload |
contact asperities |
flanged connection |
radial locking |
shear resistance |
shrink fit |
prednapetost |
radialno varovanje |
aksialno varovanje |
ekspanzijski element |
prirobnična zveza |
strižna nosilnost |
hrapavost stičnih ploskev |
samoodvijanje
Vnos na polico
Trajna povezava
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Akhtar, Muhammad Maaz | |
Karlsen, Øyvind | |
Lemu, Hirpa G. |
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