Stress-Strain Tests on Various Cast Iron Beam Sections

2009 ◽  
pp. 44-44-6
Author(s):  
H. M. Hardy ◽  
T. O. Kuivinen
Keyword(s):  
Cast Iron ◽  
Stress Strain

A machine learning based approach for determining the stress-strain relation of grey cast iron from nanoindentation

2020 ◽  
Vol 148 ◽  
pp. 103522
Author(s):  
Jian Weng ◽  
Rebecka Lindvall ◽  
Kejia Zhuang ◽  
Jan-Eric Ståhl ◽  
Han Ding ◽  
...  
Keyword(s):  
Machine Learning ◽  
Cast Iron ◽  
Grey Cast Iron ◽  
Stress Strain ◽  
Strain Relation ◽  
Stress Strain Relation ◽  
Grey Cast

Stress/strain behaviour and fatigue limit of grey cast iron

2005 ◽  
Vol 413-414 ◽  
pp. 578-582 ◽  
Author(s):  
Th. Willidal ◽  
W. Bauer ◽  
P. Schumacher
Keyword(s):  
Cast Iron ◽  
Fatigue Limit ◽  
Grey Cast Iron ◽  
Stress Strain ◽  
Strain Behaviour ◽  
Grey Cast

The Effect of Nitrogen and Inoculation on the Tensile Properties and Microstructure of Cast Iron with Lamellar Graphite

2010 ◽  
Vol 457 ◽  
pp. 114-119 ◽  
Author(s):  
Fredrik Wilberfors ◽  
Ingvar L. Svensson
Keyword(s):  
Cast Iron ◽  
Plastic Strain ◽  
Tensile Properties ◽  
Cell Size ◽  
Deformation Behaviour ◽  
Strain Curve ◽  
Eutectic Cell ◽  
Stress Strain Curve ◽  
Stress Strain ◽  
Lamellar Graphite

The main purpose with this paper is to show the effect of nitrogen and inoculation on the tensile properties and microstructure of cast iron with lamellar graphite. Casting experiments were performed with the main composition: 3.4 % C, 2.0 % Si, 0.7 % Mn, 0.5 % Cu. The nitrogen content was varied between 90-180 ppm and inoculant was added as 0, 0.2 or 0.4 % by weight. The addition of inoculant changed the graphite structure from distribution D/B/A to distribution A, according to ISO 945. The eutectic cell size decreased significantly. The addition of inoculant had no influence on the hardness. The addition of nitrogen shortened the graphite flakes and increased the hardness. The influence on the eutectic cell size was low and there was no significant effect on the graphite distribution. Tensile test samples were analysed by true stress – true plastic strain in terms of the flow relationships proposed by Hollomon, , and Ludwigson, . The stress-strain curves were fitted to polynomial functions of the 6:th to 8:th order before evaluating the constants in order to eliminate noise from the measurements. This approach also enabled the slope of the stress-strain curve to be evaluated at zero stress (Young’s modulus), resulting in plastic strain from stress levels close to zero. The Hollomon flow relationship failed to describe the deformation behaviour for the whole range of the stress-strain curve. The correction terms in the Ludwigson flow relationship resulted in a better fit. The addition of inoculant mainly affected the strength coefficient, . The addition of nitrogen also affected the constant. The main reason for this was that the addition of inoculant influenced the last part of the stress-strain curve while the addition of nitrogen had an effect over the whole range of the curve. The addition of nitrogen and inoculant increased the tensile strength from 288 MPa to 393 MPa and the total elongation at fracture from 0.8 % to 1.6 %.

scholarly journals Application of FEM in Investigating Machining Performance

2011 ◽  
Vol 264-265 ◽  
pp. 1033-1038
Author(s):  
Hendri Yanda ◽  
Jaharah A. Ghani ◽  
Che Hassan Che Haron
Keyword(s):  
Cast Iron ◽  
Cutting Force ◽  
Cutting Tool ◽  
Rake Angle ◽  
Ductile Cast Iron ◽  
Machining Performance ◽  
Stress Strain ◽  
Clearance Angle ◽  
Tool Geometries ◽  
Carbide Insert

The two biggest problems that often experienced in machining cast iron are poor machinability and high hardness. Up to now, many researchers have investigated machining performance and how to find optimum condition in machining ductile cast iron. This study aims to investigate the machining performance of ductile cast iron and carbide cutting tool using FEM. Performances were evaluated by changing the cutting tool geometries on the machining responses of cutting force, stress, strain, and generated temperature on the workpiece. Deform-3D commercial finite element software was used in this study. Ductile cast iron FCD 500 grade was used as the work piece material and carbide insert DNMA432 type with WC (Tungsten) was used for the cutting tool. The effects of rake and clearance angles were investigated by designing various tool geometries. Various combination of carbide insert geometries were designed using Solid Work to produce +15, +20 and +30 deg for rake angle and 5, 7, 8 and 9 deg for clearance angle. Machining condition for the simulations were remained constant at cutting speed of 200 m/min, feed rate of 0.35 mm/rev, and depth of cut of 0.3 mm. The results of effective-stress, strain and generated temperature on both chip and material surface were analysed. The results show that by increasing the rake angle (α), it will improves the machining performance by reducing the cutting force, stress, strain and generated temperature on surface of workpiece. But, by increasing the clearance angle (γ), it will not affect much to the cutting force, stress, strain and generated temperature on chip.

Derivation of Uniaxial Stress-Strain Curves for Cast Iron From Samples Tested in Flexure

2007 ◽  
pp. 375-376 ◽  
Author(s):  
D. A. Jesson ◽  
H. Mohebbi ◽  
H. M. S. Belmonte ◽  
M. J. Mulheron ◽  
P. A. Smith
Keyword(s):  
Cast Iron ◽  
Uniaxial Stress ◽  
Stress Strain

Stress/strain simulation model for grey cast iron

1982 ◽  
Vol 4 (3) ◽  
pp. 143-148 ◽  
Author(s):  
S.D. Downing ◽  
D.F. Socie
Keyword(s):  
Cast Iron ◽  
Simulation Model ◽  
Grey Cast Iron ◽  
Stress Strain ◽  
Grey Cast

scholarly journals Establish Using FEM Method of Constitutive Model for Chip Formation in the Cutting Process of Gray Cast Iron

Metals ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 33
Author(s):  
Lihui Tu ◽  
Weimin Shi
Keyword(s):  
Finite Element ◽  
Cast Iron ◽  
Constitutive Equation ◽  
Constitutive Model ◽  
Chip Formation ◽  
Gray Cast Iron ◽  
Gray Cast ◽  
Cutting Mechanism ◽  
Stress Strain ◽  
Cutting Simulation

The constitutive equation of mechanics, namely the stress–strain model of the material, is used to describe the mathematical expression of the mechanical properties of the material (stress–strain–intensity–time relationship). In the cutting simulation of metals, the material constitutive model needs to be established. To study the cutting mechanism of gray cast iron using the finite element method (FEM), a series of split Hopkinson press bar (SHPB) tests are carried out to achieve the stress–strain curves of gray cast iron under different strain rates and temperatures. In the cutting simulation of gray cast iron, the Johnson–Cook (JC) constitutive equation is used to reflect the mechanical behavior during the cutting process. The calculation of JC constants is analyzed deeply and obtained from the SHPB test data. One orthogonal finite element model is developed with the JC material model to reveal the cutting mechanism of gray cast iron. The chip formation, stress distribution, temperature distribution, and cutting force are investigated through the cutting simulation. At the same time, cutting experiments of gray cast iron are carried out for validating the simulation results. The results of the cutting simulation and experiments show a good agreement.

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