Efficient assembly of bolted joints under external loads using numerical FEM

Coria, Ibai; Martín, Iñigo Morales; Bouzid, Abdel‐Hakim; Heras, Iñaki; Abasolo, Mikel

doi:10.1016/j.ijmecsci.2018.05.022

Cited by 28 publications

(10 citation statements)

References 14 publications

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“…The finite element method, on the other hand, can take all relevant parameters into account. For this reason, the finite element (FE) method has been increasingly used to simulate flange joints in recent years [25][26][27][28][29][30][31][32], and the results have been used to improve analytical models, among others. FE analysis is also used in this paper as a reference method to determine the realistic bolt load in the discussed flange joint.…”

Section: Numerical Analysismentioning

confidence: 99%

Analysis of Additional Load and Fatigue Life of Preloaded Bolts in a Flange Joint Considering a Bolt Bending Load

Okorn

Nagode

Klemenc

et al. 2021

Metals

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The influence of the working load on the dynamic loading of the bolt was investigated in our study for two cases of flange joints. The analytical calculation according to the Verein Deutscher Ingenieure (VDI) 2230 recommendation and the numerical analysis using the finite element method (FEM) were performed for a model of a four-bolt joint. To verify the FEM analysis, the forces in the bolts were measured during preloading and during the application of the working load on the test rig. Based on the analytical and numerical results, the influence of the working load application point on the bolt load and its fatigue life was analysed for different cases. Comparison of the results shows that the analytical method overestimates the additional bolt stresses at low working load, mainly due to the extremely large fraction of bending stress. As the working load increases, the differences between the two methods decrease, but only for the reason that the analytical method can only linearly scale the overestimated results at lower working load, and FEM analysis, on the other hand, shows a progressive increase of the additional stress in the bolt at higher working loads due to the spreading of the flange. It is also shown that a high washer significantly increases the fatigue life of the bolt for two reasons: (i) a high washer reduces the additional stress in the bolt, and (ii) the high washer shifts the critical fatigue point from the thread area to the transition of the bolt shank to the head.

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Section: Numerical Analysismentioning

confidence: 99%

Analysis of Additional Load and Fatigue Life of Preloaded Bolts in a Flange Joint Considering a Bolt Bending Load

Okorn

Nagode

Klemenc

et al. 2021

Metals

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show abstract

“…Since the 2000s, research on bolt loosening based on finite element analysis (FEA) has been developing rapidly. Due to the complex structure of bolt thread, the axisymmetric finite element model or even two-dimensional model was used to study the mechanical properties of bolted connections (Liu et al, 2017;Coria et al, 2018). To accurately capture the mechanical properties and looseness of bolt connections, finite element models of bolts with screw thread must be established.…”

Section: Introductionmentioning

confidence: 99%

Mechanism and quantitative evaluation model of slip-induced loosening for bolted joints

Sun

Lin

Yang

et al. 2020

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Purpose Bolted joints are the most common type of mechanical connections, and improving the anti-loosening performance of bolts for the reliable performance of mechanical and building structures is highly significant. Design/methodology/approach Because of the lack of sufficient theoretical basis for the evaluation and design of anti-loosening bolts, a quantitative evaluation model exhibiting the following two evaluation criteria for anti-loosening bolts is introduced: bolt rotation angular acceleration criterion and critical transverse load criterion. Based on the relationship among bolt tension, transverse load and bolt rotation angular acceleration, a critical transverse load calculation model is put forward, and the mechanism by which the critical transverse load increases with the increase of bolt tension is revealed. Findings Based on the above model, a new type of anti-loosening bolt is designed, which generates additional bolt tension when the transverse load increases, and then improves the critical transverse load of the bolt. The effectiveness of the new type of anti-loosening bolt is verified by theoretical calculations and experiments. Originality/value The proposed model and method set a preliminary theoretical foundation for the evaluation of bolt anti-loosening performance and the design of a new anti-loosening bolt.

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“…In study of assembly performance of a gasket bolted flanged pipe joint using different bolt tightening strategies, it is concluded that the bolt scatter cannot be eliminated using torque control method, but can be reduced within acceptable level by proper bolt up sequence and multiple pass tightening [12]. Ibai Coria et al [13] found a numerical methodology that iteratively calculated the non-uniform bolt tightening load distribution to achieve a uniform gasket stress distribution, which improved the performance of bolted joints subjected to external loads. A general multi-bolts elastic interaction with bolt stress relaxation was modeled analytically to take elastic interaction and bolt stress relaxation into account before jointing [14].…”

Section: Introductionmentioning

confidence: 99%

Simulational and experimental study of stress in bolts work-piece

Zhang¹,

Zhou²,

Mao³

2020

J. meas. eng.

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In order to study the effect of different bolts tightening sequences on the stress of bolts work-piece, the finite element simulation and stress test experiments are adopted. Three types of bolt work-piece: two, five, and frame type bolts work-pieces are studied under different tightening sequences. The stress values and distribution are obtained under different tightening sequences by simulation. It is observed that the stress distribution tendency of bolts work-piece has little change under different tightening sequences. It also notices that the tightening sequences have no effect on two bolts work-piece due to the symmetry of work-piece. In five bolts work-piece, the variation range of stress under tightening from ends to middle is smaller than that under sequence tightening, which indicates that better stress uniformity is obtained under tightening from ends to middle in five bolts work-piece. Similarly, in frame bolts work-piece, the variation range of stress under symmetrical tightening is smaller than that under sequence tightening, which indicates that better stress uniformity is obtained under symmetrical tightening in frame type bolts work-piece. Furthermore, the experimental results are in good agreement with the simulation results. Moreover, the stress variation mechanism is revealed by analyzing residual preload variation under sequence tightening.

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Efficient assembly of bolted joints under external loads using numerical FEM

Cited by 28 publications

References 14 publications

Analysis of Additional Load and Fatigue Life of Preloaded Bolts in a Flange Joint Considering a Bolt Bending Load

Analysis of Additional Load and Fatigue Life of Preloaded Bolts in a Flange Joint Considering a Bolt Bending Load

Mechanism and quantitative evaluation model of slip-induced loosening for bolted joints

Simulational and experimental study of stress in bolts work-piece

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