Analysis and Design of Multiblow Hammer Forging Processes by the Explicit Dynamic Finite Element Method

CIRP Annals ◽  
1997 ◽  
Vol 46 (1) ◽  
pp. 191-194 ◽  
Author(s):  
D.Y. Yang ◽  
Y.H. Yoo
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Analysis And Design ◽  
Dynamic Finite Element ◽  
Explicit Dynamic ◽  
Hammer Forging ◽  
Element Method

Effect of Copper Wire Placement Speed Analysis on Actuator Arm by Finite Element

2014 ◽  
Vol 931-932 ◽  
pp. 994-998
Author(s):  
Rangsan Wannapop ◽  
Thira Jearsiripongkul ◽  
Thawatchai Boonluang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Computer Program ◽  
3D Model ◽  
Copper Wire ◽  
Dynamic Finite Element ◽  
Effect Of Copper ◽  
Explicit Dynamic ◽  
Automatic Loading ◽  
Element Method

This research represents a design and analysis of Automatic loading copper wire machine for the actuator arm (ALCM). The process of copper wire placement on a single actuator arm type compensates human workers. In this research, copper wire placement set is made as a 3D model by computer program before undergoes arrangement analysis via explicit dynamic finite element method to study a suitable speed for copper wire placing. It is considered by characteristics of copper wire after placed and failures occurred during the process that will define suitable speed of motor rotation. The suitable speed is corresponding to copper wire characteristic as preferred, prevent copper wire fracture and time reduction compare to human work.

scholarly journals Explicit Dynamic Finite Element Method for Predicting Implosion/Explosion Induced Failure of Shell Structures

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Jeong-Hoon Song ◽  
Patrick Lea ◽  
Jay Oswald
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Shell Element ◽  
Extended Finite Element ◽  
Shell Elements ◽  
Dynamic Finite Element ◽  
Impulsive Loads ◽  
Discontinuous Displacement ◽  
Explicit Dynamic ◽  
Element Method

A simplified implementation of the conventional extended finite element method (XFEM) for dynamic fracture in thin shells is presented. Though this implementation uses the same linear combination of the conventional XFEM, it allows for considerable simplifications of the discontinuous displacement and velocity fields in shell finite elements. The proposed method is implemented for the discrete Kirchhoff triangular (DKT) shell element, which is one of the most popular shell elements in engineering analysis. Numerical examples for dynamic failure of shells under impulsive loads including implosion and explosion are presented to demonstrate the effectiveness and robustness of the method.

Non Isothermal Hybrid Approach Using the Perfect Gas Law and Explicit Dynamic Finite Element Method for Modeling of Thermoforming and Blow Molding Processes

2005 ◽  
Author(s):  
F. Erchiqui
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Hybrid Approach ◽  
Applied Pressure ◽  
Dynamic Finite Element ◽  
Thermoforming Process ◽  
Commercial Applications ◽  
Explicit Dynamic ◽  
Theoretical Results ◽  
Element Method

Thermoforming of cut sheets is extensively used in the industry for various commercial applications. In this process, the sheet is heated to a softened state and subsequently deformed into the mould due to an applied pressure, a vacuum, a moving plug or a combination of these media. The thermoforming-process market is expanding to complex geometries and to a list of potential materials. In this work, I use a no isothermal hybrid approach which combines the dynamic finite element method and the thermodynamic law of perfect gases to study the effect of the temperature of the air flow on the blowing of a thin, isotropic and incompressible thermoplastic membrane. The viscoelastic behaviour of the K-BKZ model is considered. The Lagrangian formulation together with the assumption of the membrane shell theory is used. The numerical validation is performed by comparing the obtained results with the theoretical results for the HDPE grade. Moreover, the effect of the temperature on the thickness and stresses distribution is presented.

DYNAMIC SIMULATION OF THE TAILING PROCESS IN HOT FINISHING MILL

2008 ◽  
Vol 22 (31n32) ◽  
pp. 5661-5666
Author(s):  
SHINIL KIM ◽  
CHENG LU ◽  
XIAOZHONG DU ◽  
ANH KIET TIEU
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Tensile Stress ◽  
Deformation Behavior ◽  
Speed Ratio ◽  
Roll Speed ◽  
Dynamic Finite Element ◽  
Finishing Mill ◽  
Explicit Dynamic ◽  
Method Model

In this paper an explicit dynamic finite element method model has been developed to investigate the strip deformation behavior between two adjacent stands in hot finishing mill. The effect of the roll speed ratio of second stand to first stand on tension and the tailing behavior of the strip has been discussed in details. It has been found that the strip accumulation occurs if the roll speed ratio is small. The tensile stress increases with the roll speed ratio. During the tailing process the accumulated strip caused by the small roll speed ratios knocks onto the roll, while the swing of the strip tail occurs for the large roll speed ratios and it strikes the roll as well. Both tailing phenomena will result in the strip tail pincher or roll damage in the real operation.

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