On the stress distribution around the hole in mechanically fastened joints

Yavari, Vahid; Rajabi, Iraj; Daneshvar, Farshad; Kadivar, M. H.

doi:10.1016/j.mechrescom.2008.10.005

Cited by 11 publications

(6 citation statements)

References 23 publications

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“…Several analytical and experimental studies were also carried out by other researchers on both isotropic and orthotropic materials [3][4][5]. For instance, Yavari et al [6] investigated stress around a hole in Timoshenko plate numerically considering connection design aspects such as plate geometry, clearance and friction. Though the subject of stress analysis of an expanding pin assembly has not attracted so much attention, studies on interference and shrink fitted joints are reported in the literature, which are related topics.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Studies of Stress Distribution in an Expanding Pin Joint System

2021

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Pin joints are widely used mechanisms in different industrial machineries such as aircrafts, cranes, ships, and offshore drilling equipment providing a joint with possibility of relative rotation about one single axis. The rigidity of the joint and its service lifetime depend on the clamping force in the contact region that is provided by the applied torque. However, due to the tolerance needed for insertion of a pin in the equipment support bore, the pin is prone to relative displacement inside the bore. The amplitude of this relative displacement usually increases as time passes and since the material of the support often has lower quality grade than the pin, it leads to creation of slack in the equipment and malfunctioning of the machine. An Expanding Pin System (EPS) can be a solution to this problem where the split sleeve expands to remove the gap while the joint is torqued. Therefore, slack in the joint system disappears and 360° contact area could be achieved, providing a better stress distribution and preventing the stress localization. Determining the EPS preload and the resulting contact pressure and stresses in the joint parts are important to avoid damaging to the contact surfaces of the joints and making the dismantling of the EPS difficult. Therefore, finding the amount of the required torque is a compromise between preventing slack in the EPS and prohibiting damage to the joint parts. Stress analysis in this study is performed based on the industrially recommended torque for the EPS type under study. This article reports the study conducted on the stress distribution and the magnitude of stresses exerted to the equipment support when EPS is installed on the machine. To achieve this purpose and to investigate the stress distribution in the joint, both experimental and finite element (FE) methods were used. The experimental results show how much of the applied energy to the EPS in the form of torque is spent to expand the split sleeve and test boss and also to overcome friction. The finite element analysis provides magnitude and distribution of stresses in the EPS components.

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Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Studies of Stress Distribution in an Expanding Pin Joint System

2021

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“…Different studies are concentrated on the structural modelling of wood and predicting the strength reduction and failure, resulting from structural non-uniformities [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…It can be said that the stress distribution around constructional holes is affected, in particular, by the material properties [12], but also by aspects as: the shape of a used joint, the distance of fasteners from the edges of structural members as well as by structural member thickness [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Stress concentration around circular and elliptic holes in wood laminates

Langová¹,

Beño²,

Luptáková³

et al. 2020

FME Transactions

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This paper examines the effects of material natural anisotropy of wood on stress concentration surrounding circular and elliptic holes. A thin anisotropic plate of wood was loaded with a constant pressure in one direction. The relationships between the stress components on the edge of the elliptic and circular holes were derived. For unloaded holes, normal stress values in small areas perpendicular to the edge of the hole were calculated. When calculating stress intensity, the relationships between the direction of applied pressure and the principal directions of elastic symmetry in spruce, ash, poplar, and oak wood were investigated.

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“…Waszczak and Cruse [4] studied the bolt load on the strength and failure of a composite plate using the method of complex functions. Yavari et al [5] studied the induced stresses around a pin-loaded hole in a symmetrically stacked composite laminate of finite size. In their model they used the friction and clearance between the pin and hole edge.…”

Section: Introductionmentioning

confidence: 99%

Analytical Study of a Pin-Loaded Hole in Unidirectional Laminated Composites With Triangular and Circular Fibers

Robati

Attar

2013

Journal of Applied Mechanics

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The problem of stress concentrations in the vicinity of pin-loaded holes is of particular importance in the design of multilayered composite structures made of triangular or circular glass fibers. It is assumed that all of the fibers in the laminate lie in one direction while loaded by a force p at infinity, parallel to the direction of the fibers. According to the shear lag model, equilibrium equations are derived for both types of fibers. A rectangular arrangement is postulated in either case. Upon the proper use of boundary and bondness conditions, stress fields are derived within the laminate, along with the surrounding pinhole. The analytical results are compared to those of the finite element values. A very good agreement is observed between the two methods. According to the results, composite structures made of triangular glass fibers result in lower values of stress concentrations around the pin, as opposed to those of circular glass fibers.

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On the stress distribution around the hole in mechanically fastened joints

Cited by 11 publications

References 23 publications

Experimental and Numerical Studies of Stress Distribution in an Expanding Pin Joint System

Experimental and Numerical Studies of Stress Distribution in an Expanding Pin Joint System

Stress concentration around circular and elliptic holes in wood laminates

Analytical Study of a Pin-Loaded Hole in Unidirectional Laminated Composites With Triangular and Circular Fibers

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