An Approach for Analysis of Bulged Profile and Thickness Distribution of Tube in Free Hydro-Bulging Process

2012 ◽  
Vol 499 ◽  
pp. 127-131
Author(s):  
Xiao Feng Liu ◽  
Lian Fa Yang ◽  
Yu Xian Zhang
Keyword(s):  
Mathematical Model ◽  
Plastic Deformation ◽  
Finite Element ◽  
Wall Thickness ◽  
Deformation Behavior ◽  
Thickness Distribution ◽  
Plastic Deformation Behavior ◽  
Thin Walled Tube ◽  
Thin Walled ◽  
Tubular Components

Tubular components are widely used in the areas of automotive and aerospace industries due to their excellent properties. A mathematical model considering the bulged region as a parabola curve is proposed to examine the plastic deformation behavior of a thin-walled tube during the free hydro-bulged process. The finite element simulations of the free hydro-bulging process are carried out to verify the approach indirectly. The results indicate that the model is accurate and acceptable to figure out the circumferential radius, wall thickness and axial radius of the bulged profile.

scholarly journals A New Method of Manufacturing Thin-Walled Tube Made of AZ61 Magnesium Alloy Including Direct Extrusion And Corrugated Equal Channel Angular Extrusion

2021 ◽  
Author(s):  
H-J Hu ◽  
Ou Zhang ◽  
Gang Hu ◽  
Hui Zhao ◽  
Zhongwen OU
Keyword(s):  
Plastic Deformation ◽  
Magnesium Alloy ◽  
Large Scale ◽  
Equal Channel Angular Extrusion ◽  
Process Conditions ◽  
Workpiece Material ◽  
Plastic Deformation Behavior ◽  
Angular Extrusion ◽  
Thin Walled Tube ◽  
Thin Walled

Abstract Due to demand of strong toughness of thin walled tube, and good secondary forming properties and high-precision dimension, New plastic forming method should be researched to achieve a complete filling, uniform deformation and microstructure evolution during forming process.To obtain the deformation mechanisms of a new composite extrusion for thin walled tube fabricated by tube corrugated equal channel angular extrusion has been researched which is shorten as “TC-ECAE” in this paper. Finite element DEFORMTM-3D software to investigate the plastic deformation behavior of magnesium billet during TC-ECAE process has been employed. Computed parameters including workpiece material characteristics and process conditions have been taken into consideration. The pridictions of strains distributions and damage distributions and effective stress distributions and flow velocities distributions and microstructures evolutions have been explored. The results proved that the TC-ECAE process is a forming method for magnesium alloy tube which is suitable for large scale industrial application. The TC-ECAE process would cause serve plastic deformation and improve the dynamic recrystallization of magnesium alloy during TC-ECAE process.

Finite Element Analysis of Multi-Pass Equal Channel Angular Extrusion/Pressing Process

2010 ◽  
Vol 654-656 ◽  
pp. 1574-1577 ◽  
Author(s):  
A. Krishnaiah ◽  
K. Kumaran ◽  
Chakkingal Uday
Keyword(s):  
Plastic Deformation ◽  
Finite Element ◽  
Deformation Behavior ◽  
Finite Element Modelling ◽  
Equal Channel Angular Extrusion ◽  
Commercial Purity ◽  
Element Analysis ◽  
Fem Simulations ◽  
Plastic Deformation Behavior ◽  
Angular Extrusion

Equal channel angular extrusion (ECAE) is a severe plastic deformation (SPD) method for obtaining bulk nanostructured materials. The ECAE die consists of two equal channels that intersect at an angle, usually between 90° and 135°. In the present study, the plastic deformation behavior of the Cu during the ECAE process with 120° die through multiple passes was investigated. Finite element modelling was included in order to analyze the deformation behavior as the material passes through the die. In order to perform the FEM simulations the properties of the commercial purity Cu have been selected.

A Finite Element Investigation into the Changing Channel Angular Extrusion of Brass Alloy

2008 ◽  
Vol 594 ◽  
pp. 90-95 ◽  
Author(s):  
Dyi Cheng Chen ◽  
Jia Ci Wang ◽  
Gow Yi Tzou
Keyword(s):  
Plastic Deformation ◽  
Finite Element ◽  
Cross Sections ◽  
Deformation Behavior ◽  
Effective Strain ◽  
Extrusion Process ◽  
Brass Alloy ◽  
Rigid Plastic ◽  
Extrusion Processing ◽  
Plastic Deformation Behavior

This study investigates a novel changing channel angular (CCA) extrusion process, in which high strains are induced within the billet by passing it through a series of channels of unequal cross-sections arranged such that they form specified internal angles. Using commercial DEFORMTM 2D rigid-plastic finite element code, the plastic deformation behavior of CuZn37 brass alloy is examined during one-turn and two-turn CCA extrusion processing in dies with internal angles of φ =90o, 120o, 135o or 150o, respectively. The simulations focus specifically on the effects of the processing conditions on the effective strain, the rotation angle and the effective stress induced within the extruded billet. The numerical results provide valuable insights into the shear plastic deformation behavior of CuZn37 brass alloy during the CCA extrusion process.

Clamp Load Loss in a Bolted Joint Model With Plastic Bolt Elongation and Eccentric Service Load

2010 ◽  
Author(s):  
Xianjie Yang ◽  
Sayed Nassar ◽  
Zhijun Wu ◽  
Aidong Meng
Keyword(s):  
Plastic Deformation ◽  
Finite Element ◽  
Experimental Verification ◽  
Deformation Behavior ◽  
Joint Model ◽  
Bolted Joint ◽  
Linear Elastic ◽  
Plastic Deformation Behavior ◽  
Service Load ◽  
Joint Material

The nonlinear plastic deformation behavior of a clamped bolted joint model under a separating service load is investigated using analytical, finite element, and experimental techniques. An elastic-plastic model is used for the bolt material while the joint material remains in the linear elastic range. Both the analytical and FEA models investigate the variation in the tension of a preloaded bolt, and the corresponding change in the joint clamp load, due to a separating service load that is placed away from the bolt center. Experimental verification is provided for both the analytical and finite element results on the bolt tension variation, clamp load variation and the clamp load loss caused by the incremental plastic bolt elongation under cyclic separating force.

Springback Angle and Plastic Elongation Prediction of Thin-Walled Tube Bending by FEM

2012 ◽  
Vol 152-154 ◽  
pp. 456-461 ◽  
Author(s):  
W.J. Dan ◽  
W.G. Zhang
Keyword(s):  
Plastic Deformation ◽  
Finite Element ◽  
Dimensional Accuracy ◽  
Radius Of Curvature ◽  
Tube Bending ◽  
Bending Angle ◽  
Plastic Elongation ◽  
Thin Walled Tube ◽  
Thin Walled ◽  
Springback Angle

Springback is an inevitable phenomenon while the load is released due to the elastic property after tube bending. This leads to an increase in the radius of curvature and elongation by plastic deformation, a reduction in the bending angle of the bent tube, a decrease in dimensional accuracy and fits with others difficulty. By elastic–plastic finite element methods (FEM), a reasonable simulation model for thin-walled tube bending is established to define the relationships between process parameters and springback angle, plastic deformation. With 210 kinds of models, the results show that: 1) Springback angle and plastic elongation of bending tube are related to bending angle, bending die diameter and tube thickness. 2) Controlling functions for plastic elongation and springback angle in bending tube process are given, which is verified by tube bending experiments.

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