Stress Relaxation Behavior at High-Tension Bolted Connections of Stainless-Steel Plates

Tendo, Masayuki; Yamada, Kenji; Yasumi, S.

doi:10.1115/1.1338481

Cited by 21 publications

(4 citation statements)

References 5 publications

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“…At the ambient temperature, the stress relaxation loss is relatively small. It was found that in a high-tension bolted joint with a stainless-steel plate, the stress decrease in the bolt was no more than 2% [17] and the preload was almost unchanged. However, high temperatures will accelerate this type of preload loss.…”

Section: Frictionmentioning

confidence: 99%

Review of research on loosening of threaded fasteners

et al. 2021

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Loosening of threaded fasteners is a key failure mode, which is mainly caused by the slippage and friction behaviors on the thread and bearing surfaces, and will affect the integrity and reliability of products. Numerous scholars have conducted research on the loosening of threaded fasteners; however, comprehensive reviews on the loosening of threaded fasteners have been scarce. In this review article, we define loosening as a loss of preload and divide it into non-rotational and rotational loosening. The causes and mechanisms of non-rotational and rotational loosening are summarised. Some essential topics regarding loosening under transverse vibration have also attracted significant attention and have been investigated widely, including the loosening curve, critical condition of loosening, and influencing factors of loosening. The research carried out on these three topics is also summarised in this review. It is believed that our work will not only help new researchers quickly understand the state-of-the-art research on loosening, but also increase the knowledge of engineers on this critical subject. In the future, it is important to conduct more quantitative research on local slippage accumulation, and the relationship between local slippage accumulation and rotational loosening, which will have the potential to comprehensively unravel the loosening mechanism, and effectively guide the anti-loosening design of threaded fasteners.

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Section: Frictionmentioning

confidence: 99%

Review of research on loosening of threaded fasteners

et al. 2021

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“…Moreover, different materials have different behaviors in this respect. For instance, Tendo et al (2001) found that in the case of type 304 N plates and cold-rolled type 304 plates, deformation could not be observed and the decrease in the bolt stress was no more than 2%.…”

Section: Stress Relaxationmentioning

confidence: 99%

Multiaxial fatigue strength of structural bolts under combined cyclic axial and shear demands

Riveros¹,

Mahmoud²,

López³

2019

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High-strength bolts are used extensively in structures and are regarded as the better option for connections subjected to fatigue when compared to welds and rivets. Studies have shown the superior resistance of highstrength bolts to fatigue and conclude that it should not be an issue when a bolt is properly pre-tensioned. Nevertheless, a recent application of properly pre-tensioned bolts subjected to shear stress reversals shows extensive fatigue cracking and total severing of up to 50% of the bolts in the connections. Sufficient evidence based on experimental testing and field observations exist to suggest the possibility of fully pre-tensioned bolts coming loose due to shear stress reversals. The problem of transverse vibrational loosening of bolts has been extensively researched, as well as the issue of bolt fatigue. Only recently have they been considered together although no studies of this interaction have been conducted on highstrength bolts. Certain mechanisms mark the onset of bolt loosening and fatigue when bolts are subjected to cyclic shear or shear combined with tension. In this study, causes of bolt loosening and fatigue failure of bolted connections are explored. Specifically, the study pertains to structural bolts that are subjected to cyclic loads in multiple directions with shear reversals, which are typical of miter gate-to-pintle socket connections.

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“…For the austenitic stainless steel grades it has been reported [4], [5] that the creep rate at room temperature can be described by the following generalised equation:…”

Section: Creep Behaviour Of Stainless Steel Platesmentioning

confidence: 99%

Preload losses in stainless steel bolting assemblies

et al. 2017

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Stainless steel material is a suitable choice for modern steel constructions as it has a high resistance to corrosion combined with high material strength and ductility. Furthermore, its use leads to significant reductions in maintenance. In this frame, bolted connections made of stainless steel components become more and more important to enhance the application of stainless steel not only to small parts of steel structures but also to complex structures. Whereas non preloaded stainless steel bolted connections are already widely used, according to EN 1090-2, the application of preloaded stainless steel bolting assemblies is not allowed unless otherwise specified. If they shall be used, they shall be treated as special fasteners and a procedure test is mandatory. Also EN 1993-1-4 requires that their acceptability in a particular application has to be demonstrated from test results. These restrictions are mainly caused by two facts: firstly, the viscoplastic deformation behaviour of stainless steel which might result in not negligible preload losses in the bolting assemblies themselves and secondly, the gap of knowledge regarding suitable tightening parameters and procedures for stainless steel bolting assemblies to secure a required preload in the bolting assemblies and to avoid galling. To solve these questions, research activities have been carried out in the frame of the European RFCS-research project "Execution and reliability of slip resistant connections for steel structures using CS and SS" SIROCO. The present contribution gives an initial insight into the viscoplastic deformation behaviour of stainless steel bolting assemblies which were achieved in SIROCO which shows that preloaded bolted stainless steel connections can be treated similar to those made of carbon steel.

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Stress Relaxation Behavior at High-Tension Bolted Connections of Stainless-Steel Plates

Cited by 21 publications

References 5 publications

Review of research on loosening of threaded fasteners

Review of research on loosening of threaded fasteners

Multiaxial fatigue strength of structural bolts under combined cyclic axial and shear demands

Preload losses in stainless steel bolting assemblies

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