Finite-element simulation of semi-solid metal processing of tool steel encased in carbon steel

SIMULATION ◽  
2021 ◽  
pp. 003754972110610
Author(s):  
Eduardo Paixão Ritter ◽  
Felipe Tempel Stumpf
Keyword(s):  
Finite Element ◽  
Tool Steel ◽  
Tensile Tests ◽  
Solid Metal ◽  
Element Analysis ◽  
Precise Control ◽  
Element Simulation ◽  
Metal Processing ◽  
Scale Experiment ◽  
Semi Solid

The semi-solid metal processing allows for the production of components with complex geometries allied to lower forming forces. In the case of X210Cr12 tool steel, one big advantage of semi-solid metal processing is that it produces a microstructure free of precipitated chromium carbides, resulting in higher resistance to cyclic stresses. However, the application of this process in steels is limited until now due to technical difficulties, such as high temperatures, the necessity of a precise control of temperature, and the narrow liquidus–solidus range. For that reason, a preliminary numerical assessment of the forming procedure is highly welcome, in order to reduce potential errors in the final component. In this paper, we propose a methodology for the numerical simulation of semi-solid metal processing in steel samples under hot compression. We show that it is possible to use multilinear hardening plasticity models whose only input are the flow stress curves of each material. We also show that it is mandatory that these experimental curves are obtained through tensile tests performed at the same temperature as the working/simulated component. To validate the methodology, a full-scale experiment is undertaken so that the deformed sample can be compared to the numerical results. It is concluded that the methodology is suited for the assessment of mechanical quantities during the finite-element analysis of semi-solid processing of steel.

Solid–liquid structural break-up in M2 tool steel for semi-solid metal processing

2009 ◽  
Vol 44 (3) ◽  
pp. 869-874 ◽  
Author(s):  
M. Z. Omar ◽  
H. V. Atkinson ◽  
A. A. Howe ◽  
E. J. Palmiere ◽  
P. Kapranos ◽  
...  
Keyword(s):  
Tool Steel ◽  
Structural Break ◽  
Solid Metal ◽  
Metal Processing ◽  
Break Up ◽  
Semi Solid ◽  
Solid Liquid

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.

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

SSM Provides Important Advantages; So, why has SSM Failed to Achieve Greater Market Share?

2014 ◽  
Vol 217-218 ◽  
pp. 481-486 ◽  
Author(s):  
John L. Jorstad
Keyword(s):  
Turbulent Flow ◽  
Heat Treating ◽  
Solid Metal ◽  
Light Metals ◽  
Solidification Shrinkage ◽  
Air Entrapment ◽  
Thin Sections ◽  
Metal Processing ◽  
Semi Solid ◽  
Minimum Heat

Semi solid metal processing has numerous technical and economic advantages, such as viscous, non-turbulent flow (thus no air entrapment during casting), ability to fill ultra-thin sections (thus reduced part weight), little solidification shrinkage in the die (thus little or no porosity), minimum heat imparted to tooling (thus long tool life) and good response to T-5 aging (thus reduced heat treating costs). Still, SSM has never achieved a prominent position in the field of light metals casting Why? Perhaps the reason was largely the down economy of recent years and SSM will yet emerge with the prominence once expected of it.

Finite Element Simulation of Stable Fatigue Crack Growth Using Critical CTOD Determined by Preliminary Finite Element Analysis

2014 ◽  
Vol 891-892 ◽  
pp. 1675-1680
Author(s):  
Seok Jae Chu ◽  
Cong Hao Liu
Keyword(s):  
Finite Element ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Finite Element Simulation ◽  
Crack Growth ◽  
Crack Tip ◽  
Stress Intensity Factor Range ◽  
Crack Tip Opening Displacement ◽  
Element Analysis ◽  
Element Simulation

Finite element simulation of stable fatigue crack growth using critical crack tip opening displacement (CTOD) was done. In the preliminary finite element simulation without crack growth, the critical CTOD was determined by monitoring the ratio between the displacement increments at the nodes above the crack tip and behind the crack tip in the neighborhood of the crack tip. The critical CTOD was determined as the vertical displacement at the node on the crack surface just behind the crack tip at the maximum ratio. In the main finite element simulation with crack growth, the crack growth rate with respect to the effective stress intensity factor range considering crack closure yielded more consistent result. The exponents m in the Paris law were determined.

Finite Element Analysis of the ESTELA M1 Airplane Firewall (Representative Specimen)

2011 ◽  
Author(s):  
V. Ramirez-Elias ◽  
E. Ledesma-Orozco ◽  
H. Hernandez-Moreno
Keyword(s):  
Finite Element ◽  
Federal Aviation Administration ◽  
Element Model ◽  
Maximum Load ◽  
Load Factor ◽  
Representative Specimen ◽  
Maximum Displacement ◽  
Element Analysis ◽  
Element Simulation ◽  
The Relationship

This paper shows the finite element simulation of a representative specimen from the firewall section in the AEROMARMI ESTELA M1 aircraft. This specimen is manufactured in glass and carbon / epoxy laminates. The specimen is subjected to a load which direction and magnitude are determined by a previous dynamic loads study [10], taking into account the maximum load factor allowed by the FAA (Federal Aviation Administration) for utilitarian aircrafts [11]. A representative specimen is manufactured with the same features of the firewall. Meanwhile a fix is built in order to introduce the load directions on the representative specimen. The relationship between load and displacement is plotted for this representative specimen, whence the maximum displacement at the specific load is obtained, afterwards it is compared with the finite element model, which is modified in its laminate thicknesses in order to decrease the deviation error; subsequently this features could be applied to perform the whole firewall analysis in a future model [10].

Impact of melt treatment on semi-solid metal processing

2007 ◽  
Vol 436 (1-2) ◽  
pp. 86-90 ◽  
Author(s):  
Sahrooz Nafisi ◽  
Reza Ghomashchi
Keyword(s):  
Solid Metal ◽  
Melt Treatment ◽  
Metal Processing ◽  
Semi Solid

scholarly journals Strength Training Characteristics of Different Loads Based on Acceleration Sensor and Finite Element Simulation

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 647
Author(s):  
Bo Pang ◽  
Zhongqiu Ji ◽  
Zihua Zhang ◽  
Yunchuan Sun ◽  
Chunmin Ma ◽  
...  
Keyword(s):  
Finite Element ◽  
Knee Joint ◽  
Evaluation System ◽  
Bench Press ◽  
Element Analysis ◽  
Element Simulation ◽  
The Finite Element Analysis ◽  
Intensity Of Exercise ◽  
Deep Squat ◽  
Main Factor

Deep squat, bench press and hard pull are important ways for people to improve their strength. The use of sensors to measure force is rare. Measuring strength with sensors is extremely valuable for people to master the intensity of exercise to scientifically effective exercise. To this end, in this paper, we used a real-time wireless motion capture and mechanical evaluation system of the wearable sensor to measure the dynamic characteristics of 30 young men performing deep squat, bench press and hard pull maneuvers. The data of tibia were simulated with AnyBody 5.2 and ANSYS 19.2 to verify the authenticity. The result demonstrated that the appropriate force of the deep squat elbow joint, the hip joint and the knee joint is 40% 1RM, the appropriate force of the bench press is 40% 1RM and the appropriate force of the hard pull is 80% 1RM. The external force is the main factor of bone change. The mechanical characteristics of knee joint can be simulated after the Finite Element Analysis and the simulation of AnyBody model are verified.

Investigation on endurance evaluation of a portal crane: experimental, theoretical and finite element analysis

2020 ◽  
Vol 62 (4) ◽  
pp. 357-364
Author(s):  
Yusuf Aytaç Onur ◽  
Hakan Gelen
Keyword(s):  
Finite Element ◽  
Critical Points ◽  
Maximum Stress ◽  
Strain Gages ◽  
Finite Element Analyses ◽  
Element Analysis ◽  
Element Simulation ◽  
Main Girder ◽  
Stressed Component ◽  
Portal Crane

Abstract In this study, the stress on portal crane components at various payloads has been investigated theoretically, numerically and experimentally. The portal crane was computer-aided modeled and finite element analyses were performed so that the most stressed points at the each trolley position investigated on the main girder could be determined. In addition, the critical points were marked on the portal crane, and strain gages were attached to the those critical points so that stress values could be experimentally determined. The safety factor values at different payloads were determined by using finite element simulation. Results indicate that the most stressed component in the examined portal crane is the main girder. Experimental results indicate that the maximum stress value on the main girder is 3.05 times greater than the support legs and 8.99 times larger than the rail.

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