Compression beading and nosing of thin-walled tubes using a die: experimental and theoretical investigation

Gouveia, Bárbara; Alves, M.L.; Rosa, P.A.R.; Martins, P.A.F.

doi:10.1007/s10999-006-9009-8

Cited by 29 publications

(14 citation statements)

References 9 publications

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“…Siyahpoosh and Niknejad 5 Total absorbed energy of the fourth stage consists of summation of the absorbed energies at the end of the third stage and the obtained terms in equations (28) and (29). Consequently, the following relation is derived to predict the axial load versus the axial displacement during the fourth stage of the analytical deformation model…”

Section: Fourth Stagementioning

confidence: 99%

Contraction process of the circular tubes on the conical die: Theory and experiment

Siyahpoosh

Niknejad

2014

Proceedings of the Institution of Mechanical Engineers, Part B:

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A new theoretical model of plastic behavior of circular metal tubes during the contraction process as a metal forming and energy absorber processes is presented in this study. Some theoretical relations are developed to predict the axial load versus the axial displacement of the contraction process, based on the theoretical model. Some quasi-static experiments were performed on circular aluminum and brazen tubes to validate the theoretical analysis. In this research, effects of tube radius, contraction ratio, tube wall thickness and angle of conical die on energy absorption characteristics of circular tubes under axial quasi-static loading are investigated by the experimental and theoretical methods. Results show that there is an admissible agreement between the theoretical results and experimental measurements. Experimental results show that there is a steady force during the end zone of the process which is an important factor in viewpoint of the energy absorption. Also, the steady force increases by increment of die semi-angle, tube radius, friction coefficient and the contraction ratio.

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Section: Fourth Stagementioning

confidence: 99%

Contraction process of the circular tubes on the conical die: Theory and experiment

Siyahpoosh

Niknejad

2014

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…On the contrary to axisymmetric beads, which are naturally formed by local buckling (during successive in-plane instability waves) in tubes subjected to axial loading between parallel flat dies, asymmetric beads require the development of out-of-plane instability waves between contoured dies [2]. A tool set-up for producing out-of-plane instability waves in tubes consists of two (upper and lower) contoured dies and an inner mandrel ( Fig.…”

Section: Asymmetric Compression Beadingmentioning

confidence: 99%

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Nielsen

Zhang²,

Alves

et al. 2012

Modeling of Thermo-Electro-Mechanical Manufacturing Processes

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“…In the case of the nosed part, it was concluded that die contour, initial gap height, tube radius, and friction condition affect forming limits. FEA proved to be capable of generating forming limit diagrams ((FLD's) and determining the critical nosing ratio Gouveia et al [9].…”

Section: Introductionmentioning

confidence: 99%

Study of Aluminum Tube Cold Nosing Process Into Conical and Hemi-Spherical Dies With Different Coefficients of Friction

2020

Journal of the Egyptian Society of Tribology

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Theoretical analysis and finite element method were used to simulate the cold nosing process of commercial purity Aluminum tubes into conical and hemispherical dies. The influences of process parameters, namely initial tube wall thickness, conical semi-die angle were investigated. The effect of surface conditions on the load/displacement curve in the nosing process was investigated. The results of the nosing process were obtained in terms of load-displacement curves, thickness distribution of deformed parts, the nosing ratios and strain distributions. According to these finding, the final shape and defects of the product can also be predicted. Experimental work was carried out to verify the simulation results. A new developed setup design was proposed to improve the product quality. Two adjacent punches were used: one with a front plunger and the other was an outer sleeve to constrain the tube. It could be observed that the load increase with increasing the tube wall thickness and semi die angle. The load increased with increasing the coefficient of friction to overcome friction between the die and tube. The nosing ratio increases as wall thickness increases. Comparison between analytical and FE predictions to the experimental results showed good agreement.

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Compression beading and nosing of thin-walled tubes using a die: experimental and theoretical investigation

Cited by 29 publications

References 9 publications

Contraction process of the circular tubes on the conical die: Theory and experiment

Contraction process of the circular tubes on the conical die: Theory and experiment

Applications

Study of Aluminum Tube Cold Nosing Process Into Conical and Hemi-Spherical Dies With Different Coefficients of Friction

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