Theoretical and experimental study on formability of laser seamed tube hydroforming

Yu, Zhongqi; Kong, Qingshuai; Ma, Chao; Lin, Zhongqin

doi:10.1007/s00170-014-6130-y

Cited by 11 publications

(3 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In axial feed condition it is that observed maximum bulge height or better formability because the material feeding was done along the axial direction, but due to leakage issue less bulge height is obtained in axial feed condition. The bulging has a certain limit up to necking Simulation approach with axial feed Bulge height and FLD Friction parameters has major impact on uniform bulging of tube [27] Finite element analysis (FEA) Formability, strain paths FEA and experimental results shows close match [28] Theoretical and experimental approach Free hydroforming FLD points predicted at bursting for seamed tube [30] Theoretical and experimental Free feeding The strain paths predicted at uniaxial and biaxial points [31] Experimental and theoretical FLD data for QSTE340 grade material point and at this point formability parameters are measured before fracture. Bulge height is higher than it feeds lesser material to compensate the necking at the bulged portion.…”

Section: Experimental Testmentioning

confidence: 96%

“…The cracking failure defect has been analysed on both seamed and ERW tubes during bulging of tube. The FLC analysis demonstrates that the laser welded tube exhibits a better hydro-formability than that of the ERW tube under same input conditions [3,22,31,32]. The sensitivity analysis of thickness variations during tube bulging was studied [33], whereas a novel FLD diagram was developed for nonlinear loading paths under fixed and free conditions [34].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Predictions of formability parameters in tube hydroforming process

Marlapalle¹,

Hingole²

2021

SN Appl. Sci.

View full text Add to dashboard Cite

The objective of this study is to improve the bulging and minimize the thinning ratio to enhance manufacturing of components in Industries. Tube hydroforming is an advanced manufacturing technology used for making intricate and complex tubular parts which required less cycle time. This research focuses on hydroforming process, formability and process parameters design to replace the conventional tube bending, welding and cutting operations. The prediction of parameters is done by applying numerical and experimental approach. During experimentation the pressurized fluid is used to deform the tubes in a plastic deformation. In this study, two types of grade materials are used such as AISI304 and AISI409L of 57.15 mm external diameter with 1.5 mm thickness in the form of electric resistance welded tubes to measure stain path, thinning and bulge height. However, it is observed that the internal pressure and L/D ratio are effective parameters in both numerical analysis and experimentation. In axial feed condition, it is observed that 16.3% thinning in weld region and 44.6% thinning in base metal region, whereas, in fixed feed condition, it is observed that 7.7% thinning in weld region and 18.6%thinning in base metal region for L/D = 1 and L/D = 3 respectively. The numerical analysis with experimental results shows a very good match. It is seen that the axial feed leads to better formability with fixed feed condition because in axial feed condition material supplies towards the center of the bulge tube. The feasibility of the hydroforming process for manufacturing of AISI304 and AISI409L grade material as per the requirements of the industries is also checked. The maximum bulging is observed in L/D = 2 by comparing with the other ratios. This process can be effectively used for AISI304 grade material because the formability is better than AISI409L. Article highlights The strain path measured and predicted at necking point for ERW tube in both weld and base metal. Thinning is measured during bulging of tube under the axial and fixed feed condition. For L/D = 1 ratio observed strain distribution in unidirectional and L/D = 2, 3 observed in plane strain and bidirectional respectively.

show abstract

Section: Experimental Testmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Predictions of formability parameters in tube hydroforming process

Marlapalle¹,

Hingole²

2021

SN Appl. Sci.

View full text Add to dashboard Cite

show abstract

“…In order to conduct a finite element analysis and obtain reasonable process parameters for the tube hydroforming process, the mechanical property and formability of the tubes must be tested and evaluated accurately [1]. The testing methods for the tubes mainly have uniaxial tension test [2], full-section tension test [3], ring hoop tension test [4], and tube hydro-bulging test [5].…”

Section: Introductionmentioning

confidence: 99%

Determination of mechanical properties of anisotropic thin-walled tubes under three-dimensional stress state

Cui

Yuan

2016

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Tube hydro-bulging test is a specialized method to obtain the mechanical properties of tubes when they are deformed under bi-axial stress states. However, the normal stress cannot be ignored in double-sided tube hydroforming process. In order to investigate the mechanical properties of anisotropic thin-walled tubes under three-dimensional stress state, an analytical model for stress component calculation for fixed-end tube under internal and external pressures was proposed. Furthermore, the equivalent stress and the equivalent strain were derived using the Hill 1948 yield criterion through plastic increment theory. A thin-walled AA5052-O aluminum alloy tubes were bulged under different external pressures using a dedicated testing apparatus for double-sided tube hydrobulging tests. Then, hardening curves considering anisotropy were obtained for each external pressure condition, respectively. It is shown that the strain hardening exponent of AA5052 tube shows a slight increase with the increasing external pressure, and the external pressure of 85 MPa has little or no effects on the hardening behavior of tubes. Moreover, the anisotropy has a little effect on the strain hardening exponent, but has an obvious influence on the strength coefficient of the AA5052 tube. Therefore, for the measurement of the AA5052 tube's mechanical properties under three-dimensional stress state, the effect of external pressure can be ignored but the anisotropy of tubes must be considered.

show abstract