Extrusion of Powder/Solid Clad Rods for a Desirable Hole Ratio in Powder Region

2013 ◽  
Vol 652-654 ◽  
pp. 1984-1987
Author(s):  
Yu Hua Pang ◽  
Qi Sun ◽  
Lei Zhang ◽  
Dong Liu ◽  
Yan Hui Yang
Keyword(s):  
Plastic Deformation ◽  
Steel Powder ◽  
Element Model ◽  
Extrusion Process ◽  
Steel Tube ◽  
Deformation Region ◽  
Deformation Parameters ◽  
Powder Deformation ◽  
The Finite Element Model ◽  
Integrative Property

This paper focuses on the extrusion process of powder/solid clad rods with the desired hole ratio in the center to reduce the weight. The finite-element model about a lot of deformation body extrusion was successfully demonstrated. Raw steel powder and steel tube were consisted as powder/solid rods. While the obvious plastic deformation proceeding in deformation region, the hole ratio clearly lessened, then a little rose apart from the deformation region. The deformation parameters were determined for the purpose to lesson the weight of the rod to about 15% hole ratio in powder deformation region. The extrusion experiment and the tensile property test proved that the integrative property improved while the weight was reduced. The clad rod can be utilized in the solid suck rods.

Simulation of Roll-Over Protective Structure and Falling Object Protective Structure Tests on Heavy-Duty Mining Dump Truck

2014 ◽  
Vol 529 ◽  
pp. 188-192
Author(s):  
Xuan Zhao ◽  
Wen Ming Zhang ◽  
Jue Yang
Keyword(s):  
Static Loading ◽  
Element Model ◽  
Steel Tube ◽  
Dump Truck ◽  
Protective Structure ◽  
Heavy Duty ◽  
Standard Methods ◽  
Mining Dump Truck ◽  
Square Steel Tube ◽  
The Finite Element Model

For evaluating the safety of the 220t dump truck cab, the roll-over protective structure/falling object protective structure with welding frame made up square steel tube is tested. The finite element model of the frame is developed. The static loading and impact loading simulations are launched by ABAQUS with ISO standard methods. The results show that all parameters accord the requirement. The welding frame cab can survive and protect the operator in roll-over or falling situation. It is a feasible, economical and flexible scheme for heavy-duty dump truck.

scholarly journals Analysis on the design of steel wire wound extrusion containers for hot extrusion process

2017 ◽  
Vol 9 (7) ◽  
pp. 168781401771241
Author(s):  
Changyong Liu ◽  
Renji Zhang ◽  
Yongnian Yan ◽  
Changshi Lao
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Steel Wire ◽  
Hot Extrusion ◽  
Element Model ◽  
Extrusion Process ◽  
Stability Factor ◽  
Improved Design ◽  
The Stability ◽  
The Finite Element Model

Extrusion container is the most important tooling for steel hot extrusion process. Conventional design using large castings and forgings is very difficult to execute due to high cost and risk. Steel wire wound containers have many advantages over conventional designs. However, conventional wire wound containers are developed for use at room temperature which are not applicable to steel hot extrusion process. In this article, the impacts of preheating on the design of steel wire wound containers are discussed in detail. A finite element model was established to examine the preheating temperature distribution, and a 1:10 scaled extrusion container was manufactured to verify the effectiveness of the finite element model. Based on the finite element model–computed temperature field, thermal stress analysis was performed. The thermal impacts on the stress of extrusion container and steel wire were obtained. Results showed that insufficient stability of internal cylinder and greatly enhanced steel wire stress may lead to the failure of extrusion container. To solve the problems, an improved design was put forward by increasing the stability factor of internal cylinder, reducing the prestress factor and lowering the allowable stress of steel wire. Results showed that the improved design can meet the requirements and counteract the thermal impacts.

Dynamic Test and Analysis of Concrete Filled Steel Tube Arch Bridge

2010 ◽  
Vol 163-167 ◽  
pp. 2843-2847
Author(s):  
Li Xian Wang ◽  
Sheng Kui Di
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Model Updating ◽  
Yellow River ◽  
Dynamic Properties ◽  
Dynamic Test ◽  
Element Model ◽  
Steel Tube ◽  
Acceleration Signal ◽  
The Finite Element Model

Based on random vibration theory, virtual response is obtained from the measured acceleration signal of Yantan Yellow River Bridge of Lanzhou under ambient excitation, Yantan Yellow River bridge's modal parameters were identified by using the peak picking and stochastic subspace identification, analyzed from theoretical and experimental aspects, compared with the finite element model results and verified the reliability of recognition results. The identified dynamic properties can be served as the basis in the finite element model updating, damage detection, condition assessment and health monitoring of the bridge.

Effects of spall edge profiles on the edge plastic deformation for a roller bearing

2017 ◽  
Vol 233 (5) ◽  
pp. 850-861 ◽  
Author(s):  
Jing Liu ◽  
Zhifeng Shi ◽  
Yimin Shao ◽  
Huifang Xiao
Keyword(s):  
Plastic Deformation ◽  
Finite Element ◽  
Finite Element Model ◽  
Deformation Zone ◽  
Element Model ◽  
Plastic Deformation Zone ◽  
Plastic Deformations ◽  
Zone Width ◽  
Rolling Element ◽  
The Finite Element Model

A clear understanding of the plastic deformations at the spall edges is a primary task for the edge propagation predictions in rolling element bearings. This work proposed an elastic–plastic two-dimensional finite element model for calculating the contact stress and plastic deformation between the rolling element and raceway. This model includes a rolling element and one raceway. The rectangular plane strain solid elements are used to formulate the finite element model. The Coulomb model is used to formulate the friction force between the rolling element and raceway. A bilinear kinematic hardening material model is used in the finite element model, which can formulate the elastic–plastic deformations. The studied spall edge profiles are assumed to be sharp and cylindrical ones. To validate the finite element model, the contact deformations between the rolling element and the raceway from the proposed model and Hertzian contact theory are compared. Effects of spall edge profiles on the edge plastic deformations at the edge are analyzed, as well as the edge plastic deformation zone width. Based on the numerical results, the relationship between the edge plastic deformation and the spall edge profile, and that between the edge plastic deformation zone width and the spall edge profile are established. The results show that the edge plastic deformation is significantly influenced by the spall edge profiles, as well as the edge plastic deformation zone width. This paper provides a clear understanding of the effects of the edge profiles on the plastic deformations and propagation at the spall edge.

The Study on Numerical Simulation of Tailor Welded Blanks on Square Cup Stamping

2011 ◽  
Vol 189-193 ◽  
pp. 3932-3935
Author(s):  
Xiao Gang Qiu
Keyword(s):  
Numerical Simulation ◽  
Plastic Deformation ◽  
Strain Distribution ◽  
Weld Seam ◽  
Element Model ◽  
Forming Process ◽  
Tailor Welded Blanks ◽  
Tailor Welded Blank ◽  
Different Thickness ◽  
The Finite Element Model

The stamping process of the tailor welded blank(TWB) was simulated by the software of DYNAFORM. The finite element model of a boxy part was founded, and the forming of different thickness and properties of the material was studied. Meanwhile, the influence of weld seam on forming result was analyzed. The results show that the weld seam model which founded by real properties can describe the plastic deformation and strain distribution more exactly in the forming process.

scholarly journals Finite element simulation and experimental investigation of cold forward extrusion process

2018 ◽  
Vol 178 ◽  
pp. 02010 ◽  
Author(s):  
Dorin Luca
Keyword(s):  
Plastic Deformation ◽  
Finite Element ◽  
Element Model ◽  
Extrusion Process ◽  
The Finite Element Method ◽  
Forward Extrusion ◽  
Real Process ◽  
Element Simulation ◽  
Plastic Deformation Process ◽  
Good Agreement

Extrusion is the plastic deformation process that allows for the highest degree of complexity profiles to be obtained. This paper presents the simulation of a cold forward extrusion process using the finite element method. The results obtained show the stresses, strains and temperatures during the plastic deformation of the material, as well as the stresses and strains in the punch and die. The analysis of the results obtained for different geometric dimensions of the working tools allowed the optimization of the studied extrusion process. In order to validate the finite element model, experiments were carried out with the data acquisition from the real process, which allowed the appreciation that numerical and experimental data are found in a good agreement.

Numerical Analysis of Soil Slope in Consideration of Creep Property

2014 ◽  
Vol 501-504 ◽  
pp. 410-414
Author(s):  
Qing Huan Wang ◽  
Yong Quan Li
Keyword(s):  
Plastic Deformation ◽  
Finite Element ◽  
Numerical Analysis ◽  
Void Ratio ◽  
Creep Property ◽  
Element Model ◽  
Engineering Practice ◽  
Soil Slope ◽  
The Finite Element Model ◽  
Properties Of Soil

Drucker-Prager Model in consideration of creep property is deduced in detail, and the finite element model under Coupled Deformation and Seepage Fields is developed, which takes into account the effect of plastic deformation, saturation and void ratio on the properties of soil materials, the effect of water and soil interaction. The deformation of one soil slope is calculated by FEM during seepage. The results calculated show that the displacements calculated completely agree with the objective law. The way used may provide reference to engineering practice.

scholarly journals Finite element modeling and analysis for the integration–rolling–extrusion process of spline shaft

2017 ◽  
Vol 9 (2) ◽  
pp. 168781401668858 ◽  
Author(s):  
Minchao Cui ◽  
Shengdun Zhao ◽  
Chao Chen ◽  
Dawei Zhang ◽  
Yongyi Li
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Material Flow ◽  
Flow Behavior ◽  
Equivalent Stress ◽  
Element Model ◽  
Extrusion Process ◽  
Deformation Degree ◽  
Spline Shaft ◽  
The Finite Element Model

An integration–rolling–extrusion process is raised for the manufacture of spline shaft in this study. First, the principle and procedures of integration–rolling–extrusion process are described. Next, the finite element model with a simplified sector blank is established to obtain a practical method for the simulation of integration-rolling-extrusion process. Through the simulation results, the plastic forming mechanisms are clearly revealed. During the integration–rolling–extrusion process, the equivalent stress, deformation degree, and material flow behavior mainly distribute on the surface layer of the blank and then gradually decrease along the radial inward direction. In the core region of the blank, there are almost no effective stress distribution, deformation degree, and material flow behavior. Next, the experiments are carried out on a specialized forming equipment to verify the finite element model. The results are measured and compared with finite element results. The finite element results show a good agreement with experiments; thus, the finite element analysis on the integration–rolling–extrusion process is credible. In addition, the measurement results show that the dimensions meet the requirement of heavy truck application. It indicates that the integration–rolling–extrusion process is feasible for the manufacture of spline shaft. However, the surface quality of the formed spline shaft is not satisfying, which needs to be discussed further.

Redrawing Operation a Star Shape from Cylindrical Shape Using Experimental and FE Analysis

2020 ◽  
Vol 38 (1A) ◽  
pp. 25-32
Author(s):  
Waleed Kh. Jawad ◽  
Ali T. Ikal
Keyword(s):  
Finite Element ◽  
Effective Strain ◽  
Element Model ◽  
Cylindrical Shape ◽  
Element Analysis ◽  
Punch Force ◽  
Maximum Value ◽  
Element Simulation ◽  
Blank Sheet ◽  
The Finite Element Model

The aim of this paper is to design and fabricate a star die and a cylindrical die to produce a star shape by redrawing the cylindrical shape and comparing it to the conventional method of producing a star cup drawn from the circular blank sheet using experimental (EXP) and finite element simulation (FES). The redrawing and drawing process was done to produce a star cup with the dimension of (41.5 × 34.69mm), and (30 mm). The finite element model is performed via mechanical APDL ANSYS18.0 to modulate the redrawing and drawing operation. The results of finite element analysis were compared with the experimental results and it is found that the maximum punch force (39.12KN) recorded with the production of a star shape drawn from the circular blank sheet when comparing the punch force (32.33 KN) recorded when redrawing the cylindrical shape into a star shape. This is due to the exposure of the cup produced drawn from the blank to the highest tensile stress. The highest value of the effective stress (709MPa) and effective strain (0.751) recorded with the star shape drawn from a circular blank sheet. The maximum value of lamination (8.707%) is recorded at the cup curling (the concave area) with the first method compared to the maximum value of lamination (5.822%) recorded at the cup curling (the concave area) with the second method because of this exposure to the highest concentration of stresses. The best distribution of thickness, strains, and stresses when producing a star shape by

scholarly journals Process chain for the manufacture of hybrid bearing bushings

2021 ◽  
Vol 15 (2) ◽  
pp. 137-150
Author(s):  
Susanne Elisabeth Thürer ◽  
Anna Chugreeva ◽  
Norman Heimes ◽  
Johanna Uhe ◽  
Bernd-Arno Behrens ◽  
...  
Keyword(s):  
Extrusion Process ◽  
Steel Tube ◽  
Case Hardening ◽  
Process Chain ◽  
Forming Process ◽  
Die Forging ◽  
Material Contact ◽  
Hybrid Bearing ◽  
Case Hardening Steel ◽  
Tailored Forming

AbstractThe current study presents a novel Tailored Forming process chain developed for the production of hybrid bearing bushings. In a first step, semi-finished products in the form of locally reinforced hollow profiles were produced using a new co-extrusion process. For this purpose, a modular tool concept was developed in which a steel tube made of a case-hardening steel, either C15 (AISI 1015) or 20MnCr5 (AISI 5120), is fed laterally into the tool. Inside the welding chamber, the steel tube is joined with the extruded aluminum alloy EN AW-6082. In the second step, sections from the compound profiles were formed into hybrid bearing bushings by die forging. In order to set the required forming temperatures for each material—aluminum and steel—simultaneously, a tailored heating strategy was developed, which enabled successful die forging of the hybrid workpiece to the desired bearing bushing geometry. Using either of the case-hardening steels in combination with aluminum, this novel process chain made it possible to produce intact hybrid bearing bushings, which showed both macroscopically and microscopically intimate material contact inside the compound zone.

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