Theoretical and experimental studies for wind turbine’s shrink disk

Wang, Jianmei; Kang, Jianfeng; Tang, Liang

doi:10.1177/0954406214533529

Cited by 8 publications

(3 citation statements)

References 16 publications

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“…Yuan 16 constructed a stress analysis model for shrink-fit high-pressure vessels based on MTCT. Wang et al 17 and Jianmei et al 18 simplified the wind turbine shrinking disk into a multi-layer interference component, and deduced the matrix expression of combined pressure and interference magnitude by analyzing the geometric relationship of the multi-layer interference component using MTCT. However, the above analysis is based on the plane strain hypothesis, which can not realize the analysis of stress concentration at the mating boundary.…”

Section: Introductionmentioning

confidence: 99%

Press-fit analysis of multilayer interference fit

Wang

Zhang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Multilayer interference fits are widely used in the machinery industry, and their performance is closely related to assembly quality. Press-fit is the primary assembly method. The pre-deformation of the previous assembly step can significantly affect the stress distribution (stress concentration) and pressing force in subsequent assembly steps. Therefore, the wear degree of the contact interface and the assembly quality of the components are affected by the assembly sequence. The multilayer thick-walled cylinder theory (MTCT) cannot realize the accurate analysis of stress distribution and pressing force during assembly. Therefore, this paper optimizes the MTCT considering the resistant force generated by the non-contact regions and proposes an assembly matrix generation algorithm and an assembly sequence optimization algorithm. Compared with the simulation analysis, the optimized theoretical model can be used for the analysis of the stress distribution and pressing force of multilayer interference components. The analysis accuracy is significantly improved compared with MTCT. The optimal assembly sequence determined by the proposed algorithm is consistent with simulation results.

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Section: Introductionmentioning

confidence: 99%

Press-fit analysis of multilayer interference fit

Wang

Zhang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Interference fit is a main assembly mode, which is widely applied in the shaft sleeve parts due to good stability and simple structure [1,2]. Considering the safety and costs, some key interference fit parts need regular overhaul and maintenance, such as the rubber joint of the train's bogie.…”

Section: Introductionmentioning

confidence: 99%

Disassembly damage and bearing capacity of shaft with surface micro-texture

Yin

Huang

Zhou

et al. 2022

Surface Engineering

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The re-assembly performance of the mating surfaces in interference fit was affected by the disassembly in the previous step due to the serious friction damage. The experimental platform was built to investigate the disassembly damage and bearing capacity of a shaft in an interference fit. The effects of the surface micro-textures with different shapes and densities on disassembly damage and bearing capacity of the shaft in an interference fit were analysed from the micromorphology, microstructure, and material properties. For the micromorphology, the effects were explained based on the bearing area curve. For the microstructure and material properties, the surface strength of micro-textured surface was enhanced due to the fine grain strengthening and dislocation strengthening. The surface hardness was improved due to the generation of martensite. The results showed that the circular micro-textured surface with 20% area density effectively reduced the disassembly damage and increased the bearing capacity of the shaft in an interference fit.

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“…Some recent studies are found on the design calculation of contact pressure on the mating surfaces with interference fit for wind turbines neglecting the rotational loading effect. 30 , 31 Kamal 5 , 11 has carried out the analysis of residual stresses in the rotational autofrettage of disks, albeit by treating the disk to be rotating freely. Although the free rotation of the disk is a good approximation for the analysis of rotational autofrettage; however, rotating a disk freely is a practically challenging task.…”

Section: Introductionmentioning

confidence: 99%

Design of a disk-mandrel assembly for achieving rotational autofrettage in the disk

Kamal

Dixit

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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Rotational autofrettage is a recently proposed method to induce beneficial residual stresses in axisymmetric hollow cylindrical bodies. The feasibility of the process has been studied for both disks and cylinders used in many engineering applications. The earlier analyses of rotational autofrettage of disks are based on certain assumptions. One of the crucial assumptions is the free rotation of the disk. However, the free rotation of the disk is practically difficult. In practice, it is feasible to rotate the disk by shrink-fitting it over a solid cylindrical mandrel. In view of this, a design of a disk-mandrel assembly for achieving rotational autofrettage in disks is proposed in this article. The main aim of the design is to obtain appropriate values of the disk-mandrel interference and the rotational speed of the assembly to prevent the loss of contact of the disk with the mandrel during rotation. The critical speeds corresponding to the yield onset, contact separation and the full plastic deformation of the disk are obtained as a function of shrink interference. The safe operating design parameters can be decided by plotting the critical speeds with varying interference values. A detailed stress analysis during elastic-plastic loading of the assembly followed by the analysis of residual stresses in the assembly after unloading is presented. The analysis is based on the plane stress assumption, Tresca yield criterion and elastic unloading. The analysis is validated with a finite element method model in ABAQUS. The proposed design is illustrated through the numerical example of an ASTM A723 disk-mandrel assembly to achieve rotational autofrettage in the disk. With a small overstrain level of 17.5% in the disk, a large magnitude of compressive residual stress, viz., 0.52 times the yield stress, is induced.

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Theoretical and experimental studies for wind turbine’s shrink disk

Cited by 8 publications

References 16 publications

Press-fit analysis of multilayer interference fit

Press-fit analysis of multilayer interference fit

Disassembly damage and bearing capacity of shaft with surface micro-texture

Design of a disk-mandrel assembly for achieving rotational autofrettage in the disk

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