New Aspects of Joining by Compression and Expansion of Tubular Workpieces

Marré, Michael; Brosius, Alexander; Tekkaya, A. Erman

doi:10.1007/s12289-008-0140-y

Cited by 21 publications

(6 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The expression in the first set of brackets in Equation (2) represents that the strain to fracture decreases as the average normal stresses, P, increase. The second set of brackets represents the effect of the strain rate, and that in the third set of brackets represents the effect of temperature [30].…”

Section: Numerical Modelingmentioning

confidence: 99%

“…A large number of techniques is used to make sheet metal parts. In recent years, many aspects of sheet metal forming processes have been widely studied using electromagnetic forming, especially with regard to the behavior of materials under a high strain rate, the possible future applications and numerical modeling of the process, with several works dedicated to these topics [1][2][3][4][5][6][7]. Moreover, a detailed review of numerical simulations in sheet metal forming and potential developments is presented by Tekkaya [8].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental and Numerical Studies of Sheet Metal Forming with Damage Using Gas Detonation Process

Patil

Prajapati

Jenkouk

et al. 2017

Metals

View full text Add to dashboard Cite

Abstract:Gas detonation forming is a high-speed forming method, which has the potential to form complex geometries, including sharp angles and undercuts, in a very short process time. Despite many efforts being made to develop detonation forming, many important aspects remain unclear and have not been studied experimentally, nor numerically in detail, e.g., the ability to produce sharp corners, the effect of peak load on deformation and damage location and its propagation in the workpiece. In the present work, DC04 steel cups were formed using gas detonation forming, and finite element method (FEM) simulations of the cup forming process were performed. The simulations on 3D computational models were carried out with explicit dynamic analysis using the Johnson-Cook material model. The results obtained in the simulations were in good agreement with the experimental observations, e.g., deformed shape and thickness distribution. Moreover, the proposed computational model was capable of predicting the damage initiation and evolution correctly, which was mainly due to the high-pressure magnitude or an initial offset of the workpiece in the experiments.

show abstract

Section: Numerical Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Studies of Sheet Metal Forming with Damage Using Gas Detonation Process

Patil

Prajapati

Jenkouk

et al. 2017

Metals

View full text Add to dashboard Cite

show abstract

“…In cases like this, the connection that is produced between the tube and the sheet relies mainly on the remaining interfacial stresses developed between the contact surfaces after unloading and gives rise to a force-fit joint. 9 The suitability of force-fit joints is often limited by the load requirements to which they will be subjected, and their formation mechanism cannot generally be surpassed by the application of larger squeezing depths or the utilization of punches with larger cross-section recess lengths. In fact, for cases like that shown in Figure 4(b), it will always be easier for the material to flow outwardly and give rise to undesirable bending as it was observed in the experiments performed with larger cross-section recess lengths l of the punch (i.e.…”

Section: Analysis Of the Deformationmentioning

confidence: 99%

Deformation-assisted joining of tubes to sheets made from dissimilar materials

Alves

Afonso

Martins

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

Following previous developments of the authors on deformation-assisted joining of metal tube-sheet connections by annular sheet squeezing, it is the aim and objective of this paper to extend the process applicability domain to polymers and composites. The presentation includes an overview of the main operative parameters, typical plastic deformation modes and process workability limits. Experiments and finite element simulations allowed comparing the results obtained with dissimilar materials against those earlier obtained with metal tubes and sheets. Results confirm the possibility of combining dissimilar materials in form-fit and force-fit tube-sheet connections for applications in flexible lightweight structures.

show abstract

“…Recent research activities investigated several different techniques. Marré investigated joining involving the forming of thin-walled tubes [5] and principally verified the feasibility of hybrid joining, combining the forming processes of rolling, die-less hydroforming and electromagnetic compression with an adhesive, although all processes are limited to the use of hollow, thin-walled tubes. With regard to shaft-hub connections, knurled joints were investigated by Kitamura and Hirota [6,7], whereby no preparation of the two joining partners is required.…”

Section: State Of the Artmentioning

confidence: 99%

Numerical study on the applicability to manufacturing of contact-stress-optimised shaft-hub connections joined by lateral extrusion

et al. 2020

View full text Add to dashboard Cite

Shaft-hub connections, which are joined by plastic deformation of at least one component (e.g. joining by lateral extrusion), can meet today's contradictory requirements for high power densities with low manufacturing costs. As opposed to classical manufacturing methods, the tight manufacturing tolerances of shafts and hubs are not required here since the shaft is formed in the hub during the process to generate a combined frictional and positive-locking connection. However, plastic deformation generally results in an uneven distribution of contact stress, which causes negative effects such as increased hub stress and deformation, as well as the reduced transmission capacity of the connection. To overcome this effect, an iterative design approach for plastically stressed shaft-hub connections was developed in Ulrich et al. (2019)[1], in which the contact-stress distribution is influenced by contouring of the hub contact surface. Nonetheless, one major challenge in this process is the high sensitivity of the stress distribution to contour changes, particularly in the edge area of the connection, meaning that a dependency on tight manufacturing tolerances is present here, too. Therefore, an investigation is conducted to determine the extent to which deviations in the manufacturing process of the components, in the tool quality and during joining by lateral extrusion influence the resulting contact stress. In order to achieve this goal, numerical investigations are carried out, and the effects on the resulting contact-stress distribution are analysed. Finally, recommendations for manufacturing accuracy and process limits are derived in order to ensure manufacturability and enable the transfer of technology to industrial applications involving shaft-hub connections joined by lateral extrusion.

show abstract

New Aspects of Joining by Compression and Expansion of Tubular Workpieces

Cited by 21 publications

References 2 publications

Experimental and Numerical Studies of Sheet Metal Forming with Damage Using Gas Detonation Process

Experimental and Numerical Studies of Sheet Metal Forming with Damage Using Gas Detonation Process

Deformation-assisted joining of tubes to sheets made from dissimilar materials

Numerical study on the applicability to manufacturing of contact-stress-optimised shaft-hub connections joined by lateral extrusion

Contact Info

Product

Resources

About