Finite Element Simulation for Superplastic Blow Forming of Toroidal Ti-6Al-4V Fuel Tank

2012 ◽  
Vol 735 ◽  
pp. 240-245 ◽  
Author(s):  
Jong Hoon Yoon ◽  
Ho Sung Lee ◽  
Yeng Moo Yi ◽  
Joon Tae Yoo
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Thickness Distribution ◽  
Pressure Profile ◽  
Fuel Tank ◽  
Hydraulic Pressure ◽  
Final Shape ◽  
Element Simulation

In the current study, the finite element simulation for superplastic blow forming of a toroidal Ti-6Al-4V fuel tank is discussed. 3 types of preforms are investigated in order to obtain defect free final shape with desirable thickness distribution. From the simulation result, forming tool is designed so that the hydraulic pressure is not used. The forming test is carried out using forming pressure profile obtained from the simulation, and the validity of the selected perform is investigated in terms of thickness distribution and deformed shape.

Finite Element Simulation on Superplastic Forming of Outer Jacket of Combustion Chamber

2010 ◽  
Vol 433 ◽  
pp. 219-224 ◽  
Author(s):  
Jong Hoon Yoon ◽  
Yeong Moo Yi ◽  
Ho Sung Lee
Keyword(s):  
Finite Element ◽  
Combustion Chamber ◽  
Finite Element Simulation ◽  
Thickness Distribution ◽  
Superplastic Forming ◽  
Pressure Profile ◽  
Element Simulation ◽  
Bulging Test ◽  
Free Bulging ◽  
Flow Stress Equation

In this paper, mould configurations are studied by finite element simulation for superplastic blow forming of combustion chamber outer jacket. One concave and two convex mould configurations are basically considered to determine which type would be advantageous in terms of forming time and thickness distribution. For the simulation, the flow stress equation of duplex stainless steel was determined from free bulging test. The simulation results showed that the concave type was quit a bit different from the other two cases. The concave mould configuration produced shorter forming time and thicker thickness distribution than the others, and it seems to be more effective for superplastic forming of outer jacket. The obtained pressure profile for the concave mould configuration was employed in actual forming and the thickness distribution was compared for the verification.

Material Flow Estimation of Deep-Drawn Product by Using Finite-Element Simulation

2011 ◽  
Vol 301-303 ◽  
pp. 452-455 ◽  
Author(s):  
Yuji Kotani ◽  
Hisaki Watari ◽  
Akihiro Watanabe
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Finite Element Simulation ◽  
Material Flow ◽  
Thickness Distribution ◽  
Sheet Thickness ◽  
Original Material ◽  
Element Simulation ◽  
Thickness Prediction ◽  
Simulation And Evaluation

The approach to total weight reduction has been a key issue for car manufacturers as they cope with more and more stringent requirements for fuel economy. In sheet metal forming, local increases in product-sheet thickness effectively contribute to reducing the total product weight. Products could be designed more efficiently if a designer could predict and control the thickness distribution of formed products. This paper describes a numerical simulation and evaluation of the material flow in local thickness increments of products formed by an ironing process. In order to clarify the mechanism of the local increase in sheet thickness, a 3-D numerical simulation of deep drawing and ironing was performed using finite-element simulation. The effects of various types of finite elements that primarily affect thickness changes in original materials and thickness prediction were investigated. It was found that the sheet-thickness distribution could be predicted if the original material was relatively thick and if an appropriate type of finite element is selected.

The Hydroforming of Micro-Square Tubes With Non-Equal Section and Dendritic Shape

2006 ◽  
Vol 505-507 ◽  
pp. 739-744
Author(s):  
Yuan Chuan Hsu ◽  
Tung Sheng Yang ◽  
J.L. Wu ◽  
Y.X. Chen
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Tube Hydroforming ◽  
Simulation Technique ◽  
Hydraulic Pressure ◽  
Micro Forming ◽  
Wall Thinning ◽  
Element Simulation ◽  
Feeding Speed ◽  
Dendritic Shape

Currently, tube hydroforming and metal micro-forming technique have emerged as the attractive and important developing tendencies in industry. Hence, in this study, the finite element simulation technique was employed to investigate the micro-hydroforming for making the micro-square tube with non-equal section and dendritic shape from square tube. Results of the current study show that the deformation of micro-square tube can be effectively analyzed by finite element simulation. The bulging and wall thinning of the tube are severely influenced not only by the internal hydraulic pressure but also by the punch axial feeding speed.

Finite Element Simulation and Experimental Study of the Effect of Cone Parameter on Thickness Distribution in Hydroforming of Conical-Cylindrical Cups

2011 ◽  
Vol 189-193 ◽  
pp. 2634-2637
Author(s):  
Abdol Hamid Gorji ◽  
M. Bakhshi ◽  
S. Nourouzi ◽  
S.J. Hosseinipour ◽  
G. Mohammad-Alinejad
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Metal Forming ◽  
Thickness Distribution ◽  
Blank Holder ◽  
Sheet Surface ◽  
Multi Stage ◽  
Element Simulation ◽  
Tip Radius ◽  
Explosive Forming

Forming conical parts is one of the complex and difficult fields in sheet metal forming processes; because of the low contact area of the sheet with the punch in the initial stages of forming, too much tension is applied to the sheet causing burst occurrence. Furthermore, since the major part of the sheet surface between the blank holder and punch tip is free, wrinkles appear on the wall of the drawn parts. Therefore, these parts are normally formed in the industry by spinning, explosive forming or multi-stage deep drawing processes. In this paper, the parameters in the process of hydroforming conical parts along with using finite element simulation and experimental procedures have been studied. The punch radiuses parameters (the punch tip radius and the radius between the conical and cylinder section and their effects on the bursting and thickness distribution were investigated.

Investigation of Load Path Effect on Thickness Distribution and Product Geometry in the Bulge Hydroforming Process

2011 ◽  
Vol 110-116 ◽  
pp. 1477-1482 ◽  
Author(s):  
Majid Elyasi ◽  
Hassan Khanlari ◽  
Mohammad Bakhshi-Jooybari
Keyword(s):  
Finite Element ◽  
Stainless Steel ◽  
Finite Element Simulation ◽  
Experimental Approach ◽  
Thickness Distribution ◽  
Tube Hydroforming ◽  
Low Carbon ◽  
Load Path ◽  
Element Simulation ◽  
Hydroforming Process

In this paper, the effect of load path on thickness distribution and product geometry in the tube hydroforming process is studied by finite element simulation and experimental approach. The pressure path was obtained by using finite element simulation and its validation with experiments. In simulations and experiments, low carbon stainless steel (SS316L) seamless tubes were used. The obtained results indicated that if pressure reaches to maximum faster, bulge value and thinning of the part will be more and wrinkling value will be less.

scholarly journals Investigating the Effect of Interlayer Geo-stress Difference on Hydraulic Fracture Propagation: Physical Modeling and Numerical Simulations

2016 ◽  
Vol 9 (1) ◽  
pp. 195-206 ◽  
Author(s):  
Xiaosen Shang ◽  
Yunhong Ding ◽  
Lifeng Yang ◽  
Yonghui Wang ◽  
Tao Wang
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Hydraulic Fracture ◽  
Physical Simulation ◽  
Fracture Propagation ◽  
Extended Finite Element ◽  
Final Shape ◽  
Propagation Behavior ◽  
Element Simulation ◽  
Fracture Height

The morphological control of the fracture has a great impact on the effectiveness of the hydraulic fracturing; the geostress difference between productive interval and barriers is one of controlling factors for the fracture height control. The propagation behavior of the hydraulic fracture was studied using the 3D physical simulation under conditions of the presence and absence of the interlaminar geostress difference. Combined with the result of the acoustic monitoring, the dynamic propagation process and the final shape of fracture were achieved. It shows that the lateral and vertical propagations of the fracture simultaneously occurred without the interlaminar geostress difference, and a fracture with round-shape face was finally presented. On the contrary, under the presence of the interlaminar geostress difference, due to the barrier effect of the high stress barrier on the vertical propagation of the fracture, the fracture height was obviously limited after the fracture propagated to the interval boundary. Therefore, the final shape of the fracture face was elliptical. Moreover, the extended finite element simulation was also adopted to analyze the propagation of the hydraulic fracture under two conditions mentioned above, and the result was consistent with that of the physical simulation. This verifies the feasibility of the extended finite element simulation method; therefore, this method was used to further simulate the fracture propagation behavior when several layers with different stiffness simultaneously exist. The result presents that during the fracture propagation, the fracture passed through the layer which has relatively weak stiffness and stopped before the layer which has stronger stiffness. Conclusions of this study can provide reference for the research of fracture propagation in complex geostress reservoirs.

Finite Element Simulation of Canned Forging on TiAl Alloy Containing High Nb

2005 ◽  
Vol 475-479 ◽  
pp. 813-816 ◽  
Author(s):  
Hao Zhuan Lin ◽  
Shu Suo Li ◽  
Xikong Su ◽  
Ya Fang Han
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Tial Alloy ◽  
Simulation Method ◽  
Stress And Strain ◽  
Large Ingot ◽  
Rigid Plastic ◽  
Final Shape ◽  
Element Simulation ◽  
Distribution Of Stress

A rigid plastic finite element simulation method on canned forging was introduced to explain and optimize the large ingot deformation of TiAl alloy containing high content of Nb. By this method the process of deformation and the distribution of stress and strain especially on the interface can be obtained, thus the influence of capsule on the deformation and final shape of ingot can be easily explained and an appropriate processing of canned forging was ingot.

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