Mechanism Research on Pelleting Process and Block Self-Healing of Mixture Recycled Plastics in Die-Plate

2015 ◽  
Vol 768 ◽  
pp. 36-44
Author(s):  
Yong Gang Zou ◽  
Bo Wang ◽  
Xiao Feng Liu ◽  
Bing Zhang
Keyword(s):  
Finite Element ◽  
Rheological Properties ◽  
Finite Element Simulation ◽  
Polymer Melt ◽  
Self Healing ◽  
Melting Points ◽  
Element Simulation ◽  
Mechanism Research ◽  
Recycled Plastics ◽  
The Relationship

For many recycled plastics, materials with different rheological properties and melting points are usually mixed together, and can not be separated. For this situation, the block of die-plate holes can be regarded as an important factor that must be taken into consideration in pelleting process. This paper discusses pelleting process in die-plate and reasons of die hole’s blocking. Finite element simulation is calculated to analyze the relationship between operation factors of pelleting process and blocking situation of die holes. Furthermore, block self-healing is realized by changing the velocity of polymer-melt in die-hole.

Simulation of hot high-speed yielding of intermetallic titanium alloy VTI-4 under conditions of high-speed loading

2020 ◽  
Vol 0 (12) ◽  
pp. 10-16
Author(s):  
V.V. Avtaev ◽  
◽  
D. V. Grinevich ◽  
A. V. Zavodov
Keyword(s):  
Finite Element ◽  
Titanium Alloy ◽  
Strain Rate ◽  
Finite Element Simulation ◽  
Modulus Of Elasticity ◽  
High Speed ◽  
Residual Deformation ◽  
Test Results ◽  
Element Simulation ◽  
The Relationship

Yielding tests of VTI-4 alloy specimens have been carried out at temperature 1010 °C under conditions of high-speed loading. Based on the test results the modulus of elasticity as well as axial and radial residual deformation values in the end and central zones for each loading stage were determined. Fitting criteria for finite element simulation and the experiment are proposed with tracing VTI-4 alloy diagram deformation at temperature 1010 °C and strain rate of 2.5 sec–1. As a result of finite element simulation the relationship between the material structures obtained during high-speed yielding and the deflected modes in different zones was determined.

Theoretical Analysis and Experimental Study on the Vibration of the Bimorph Piezoelectric Vibrator for Piezoelectric Pump

2014 ◽  
Vol 551 ◽  
pp. 164-169 ◽  
Author(s):  
Wei Zheng ◽  
Bai Song Lin ◽  
Jing Shi Dong ◽  
Jing Yuan Shi ◽  
Bo Da Wu
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Vibration Mode ◽  
Test Results ◽  
Piezoelectric Pump ◽  
Bending Vibration ◽  
Piezoelectric Vibrator ◽  
Element Simulation ◽  
Support Conditions ◽  
The Relationship

This paper studied the characteristics of the bimorph piezoelectric vibrator for piezoelectric pump. By simulating the working conditions of the vibration in the pump, we constructed a dynamic model and derived the bending vibration equations of the piezoelectric vibrator under different support conditions. Then the analysis of finite element simulation is carried out for the equations, through which the vibration mode of the multi-order modal of the piezoelectric vibrator was acquired, and the relationship between the deformation deflection and peripheral support stiffness of the piezoelectric vibrator was analyzed. Finally, the deformation of the piezoelectric vibrator was tested. It is found that the test results are consistent with the conclusions of the finite element simulation, which provides a theoretical basis for the optimal design of the bimorph piezoelectric vibrator.

Influence of feed per tooth on tool wear based on 3D finite element simulation in micro-milling of Inconel 718

2017 ◽  
Vol 69 (4) ◽  
pp. 585-590 ◽  
Author(s):  
Xiaohong Lu ◽  
FuRui Wang ◽  
Zhenyuan Jia ◽  
Likun Si ◽  
Yongqiang Weng
Keyword(s):  
Finite Element ◽  
Tool Wear ◽  
Finite Element Simulation ◽  
Inconel 718 ◽  
Chip Thickness ◽  
Micro Milling ◽  
Wear Depth ◽  
Content Type ◽  
Element Simulation ◽  
The Relationship

Purpose This paper aims to predict tool wear and reveal the relationship between feed per tooth and tool wear in micro-milling Inconel 718 process. Design/methodology/approach To study and solve the tool wear problem in micro-milling of Inconel 718 micro components, in this paper, the investigation of micro-milling Inconel 718 process was implemented based on DEFORM finite element simulation, and tool wear depth of micro-milling cutter acted as output. Findings Different from the traditional macro milling process, diameter reduction percentage and average flank wear length decreased with the increase of feed per tooth; tool wear depth decreased when the feed per tooth was less than the minimum chip thickness. Originality/value At present, research on the prediction of tool wear in micro-milling of Inconel 718 has never been publicly reported. This study is significant to reveal the relationship between cutting parameters (feed per tooth) and tool wear in micro-milling Inconel 718.

Finite Element Simulation for Titanium Alloy Cutting by Bio-Mimetic Wear-Resistant Cutter

2014 ◽  
Vol 926-930 ◽  
pp. 362-365
Author(s):  
Gui Qiang Liang ◽  
Li Gong Cui ◽  
Fang Shao
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Metal Cutting ◽  
Cutting Temperature ◽  
Simulation Method ◽  
Machining Process ◽  
Basic Principles ◽  
Wear Resistant ◽  
Element Simulation ◽  
The Relationship

Bionics research finds that the non-smooth morphology surfaces of some typical animals can reduce the forward resistances in the movement process. We can imitate these characteristics to reduce the machine tool wear during the machining process, which greatly promotes the machining and production procedure. Using the finite element simulation method, the effect of TC4 bio-mimetic wear-resistant cutter on cutting force, cutting temperature and micro-process were researched in-depth. The results verified the effect of bionic wear-resistant tool on the anti-friction process of metal cutting. On the other hand, we discussed the relationship between the effect and parameter of the tool surface non-smooth morphology is not smooth. Also, this paper revealed the basic principles of bionic wear-resisting tool anti-friction, which provides guidance for the selection of non-smooth morphology.

Thickness Increasing Characteristics of Steel Pipe during Die Forming

2014 ◽  
Vol 575 ◽  
pp. 276-281
Author(s):  
Masahiro Dohi ◽  
Hirotaka Kamiyama ◽  
Shinichi Nishida ◽  
Hisaki Watari
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Three Dimensional ◽  
Steel Pipes ◽  
Element Simulation ◽  
The Press ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element ◽  
The Relationship ◽  
Die Forming

Relationships among the forming conditions (such as shapes of dies, lubrication conditions, and slide motion of the press machine) and the thickening ratio (thickness after forming / thickness before forming) has been clarified in uniaxial press forming by experiments and a three dimensional finite element simulation. Steel pipes with 39.0mm and 7.6mm thickness were used in the experiment. The relationship between thickening ratio and the forming load that depends on the die shape, lubrication, and slide motion of the press machine was investigated. It has also been found that an eight percent increase of the wall thickness of the pipes could be possible without buckling. It has been clarified that thickening ratio during die forming could be predictable by using a finite element simulation.

A finite element simulation of polymer melt flows

1986 ◽  
Vol 6 (4) ◽  
pp. 501-508 ◽  
Author(s):  
Philippe A. Tanguy ◽  
André Fortin
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Polymer Melt ◽  
Element Simulation

Analysis of magnetic force and dynamic characteristic for non-contact permanent magnet linear drive device

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1337-1345
Author(s):  
Chuan Zhao ◽  
Feng Sun ◽  
Junjie Jin ◽  
Mingwei Bo ◽  
Fangchao Xu ◽  
...  
Keyword(s):  
Finite Element ◽  
Permanent Magnet ◽  
Dynamic Characteristic ◽  
Driving Force ◽  
Magnetic Circuit ◽  
Response Speed ◽  
Computation Method ◽  
Element Analysis ◽  
Element Simulation ◽  
The Relationship

This paper proposes a computation method using the equivalent magnetic circuit to analyze the driving force for the non-contact permanent magnet linear drive system. In this device, the magnetic driving force is related to the rotation angle of driving wheels. The relationship is verified by finite element analysis and measuring experiments. The result of finite element simulation is in good agreement with the model established by the equivalent magnetic circuit. Then experiments of displacement control are carried out to test the dynamic characteristic of this system. The controller of the system adopts the combination control of displacement and angle. The results indicate that the system has good performance in steady-state error and response speed, while the maximum overshoot needs to be reduced.

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