Material Information Dialog¶

Outline¶

Creates material information, or lets you view or modify the material information items that have been entered.

How to open¶

Click the Material button in the Insert tab > Entity group of the ribbon menu.
Double-click the Material item in the Project Explorer.
Double-click the Material item in the Workspace.

Dialog layout¶

material

Elastic tab¶

The tab in which the elastic properties of the material (Young's modulus, Poisson's ratio, thermal expansion coefficient, density) are entered.

Dialog layout¶

material-elastic

Input data¶

Young's modulus¶

Enter the Young's modulus as a function of temperature in the list.

Poisson's ratio¶

Enter the Poisson's ratio as a function of temperature in the list.

Thermal expansion coefficient¶

Enter the thermal expansion coefficient as a function of temperature in the list.

Density¶

Enter the density at room temperature.

The following applies to Young's modulus, Poisson's ratio and thermal expansion coefficient alike.

Insert - Inserts new data in front of the row selected in the list. If no row is selected, the data is added at the very top.
Add - Adds new data after the row selected in the list. If no row is selected, the data is added at the very end.
Remove - Removes the row selected in the list. Does nothing if no row is selected.
Graph - Opens a dialog that plots the values of the list as a graph.

How to use¶

The following applies to Young's modulus, Poisson's ratio and thermal expansion coefficient alike.

Click the Insert or Add button to add a row.
Click the added row to change a value; an edit box becomes active.
Enter the value in the edit box.

Flow stress¶

Select the flow stress model from the combo box.

Flow stress model 1¶

A modified version of the Swift model.
Flow stress data can be generated with AFDEX_MAT from tensile test data.

Dialog layout¶

flowstress-screen1

Input data¶

Yield strength - Enter the yield strength of the material.
Strain hardening exponent - Enter the strain hardening exponent of the material.
Strain reduction ratio - Enter the strain reduction ratio of the material.
Graph - Opens a dialog showing the flow stress graph.

Flow stress model 2¶

The C-m model.

Dialog layout¶

flowstress-screen2

Input data¶

Strength coefficient - Enter the strength coefficient of the material.
Strain rate hardening exponent - Enter the strain rate hardening exponent of the material.
Minimum flow stress - Enter the minimum flow stress of the material.
Graph - Opens a dialog showing the flow stress graph.

Flow stress model 3¶

The Hollomon model.
Flow stress data can be generated with AFDEX_MAT from tensile test data.

Dialog layout¶

flowstress-screen3

Input data¶

Strength coefficient - Enter the strength coefficient of the material.
Strain hardening exponent - Enter the strain hardening exponent of the material.
Minimum flow stress - Enter the minimum flow stress of the material.
Graph - Opens a dialog showing the flow stress graph.

Flow stress model 4¶

The Ludwick model.
Flow stress data can be generated with AFDEX_MAT from tensile test data.

Dialog layout¶

flowstress-screen4

Input data¶

Yield stress - Enter the yield stress of the material.
Strength coefficient - Enter the strength coefficient of the material.
Strain hardening exponent - Enter the strain hardening exponent of the material.
Graph - Opens a dialog showing the flow stress graph.

Flow stress model 5¶

The Zener-Hollomon model.

Dialog layout¶

flowstress-screen5

Input data¶

Gas constant - A fixed value.
Order - The order of the polynomials representing \(\alpha\), \(n\), \(Q\) and \(\text{ln}A\) (maximum 9)
List - Double-click the position of the value to be changed in the list; an edit box becomes active. Enter the value in the active edit box.
Advanced - Opens the dialog for setting the variable ranges of the hot material information.
Graph - Opens a dialog showing the flow stress graph.

Flow stress model 6¶

The Polynomial model. \(K\), \(n\), \(m\) and \(wt\) are functions of strain and temperature. The solver converts the list into a polynomial of order (LP) for the calculation.

Dialog layout¶

flowstress-screen6

Input data¶

Number of strains - Select the number of strains. (maximum 20)
Number of temperatures - Select the number of temperatures. (maximum 20)
Order of interpolation function - Select the order of the interpolation function. (maximum 3)
List - Double-click the position of the value to be changed in the list; an edit box becomes active. Enter the value in the active edit box.
Advanced - Opens the dialog for setting the variable ranges of the hot material information.
Graph - Opens a dialog showing the flow stress graph.

Flow stress model 7¶

The Piecewise Temperature model. \(K\), \(n\) and \(m\) are functions of temperature.

Dialog layout¶

flowstress-screen7

Input data¶

Number of temperatures - Select the number of temperatures. (maximum 20)
List - Double-click the position of the value to be changed in the list; an edit box becomes active. Enter the value in the active edit box.
Advanced - Opens the dialog for setting the variable ranges of the hot material information.
Graph - Opens a dialog showing the flow stress graph.

Flow stress model 8¶

The modified Hollomon model. \(K\) is a function of strain.
Flow stress data can be generated with AFDEX_MAT from tensile test data.

Dialog layout¶

flowstress-screen8

Input data¶

Strain hardening exponent - Enter the strain hardening exponent.
Yield stress - Enter the yield stress.
List - Double-click the position of the value to be changed in the list; an edit box becomes active. Enter the value in the active edit box.
Insert - Inserts new data in front of the row selected in the list. If no row is selected, the data is added at the very top.
Add - Adds new data after the row selected in the list. If no row is selected, the data is added at the very end.
Remove - Removes the row selected in the list. Does nothing if no row is selected.
Graph - Opens a dialog that plots a graph.

Flow stress model 9¶

The Misaka model. The flow stress is obtained by entering the chemical composition (C, Mn, V, Mo, Ni). This model is taken from the Journal of the Japan Society for Technology of Plasticity (JSTP).

Dialog layout¶

flowstress-screen9

Input data¶

Carbon content - Enter the carbon content.
Manganese content - Enter the manganese content.
Vanadium content - Enter the vanadium content.
Molybdenum content - Enter the molybdenum content.
Nickel content - Enter the nickel content.
Minimum yield strain - Enter the minimum yield strain.
Maximum yield strain - Enter the maximum yield strain.
Minimum temperature - Enter the minimum temperature.
Maximum temperature - Enter the maximum temperature.
Graph - Opens a dialog that plots a graph.

Flow stress model 10¶

The Yield - Tensile Strength model. When the yield strength and the tensile strength of the steel are entered, they are converted into the coefficients of the Hollomon model to obtain the flow stress. This model is taken from the Journal of the Japan Society for Technology of Plasticity (JSTP).

Dialog layout¶

flowstress-screen10

Input data¶

Yield stress - Enter the yield stress.
Tensile strength - Enter the tensile strength.
Graph - Opens a dialog that plots a graph.

Flow stress model 11¶

The point data model. Enter the data of the true stress-strain curve.

Dialog layout¶

flowstress-screen11

Input data¶

List - Double-click the position of the value to be changed in the list; an edit box becomes active. Enter the value in the active edit box.
Insert - Inserts new data in front of the row selected in the list. If no row is selected, the data is added at the very top.
Add - Adds new data after the row selected in the list. If no row is selected, the data is added at the very end.
Remove - Removes the row selected in the list. Does nothing if no row is selected.
Graph - Opens a dialog that plots a graph.

Flow stress model 13¶

The Patchwise Temperature and Strain-rate model.

Dialog layout¶

flowstress-screen13

Input data¶

Number of strain rates - Select the number of strain rates used to represent \(K\) and \(n\).
Number of temperatures - Select the number of temperatures used to represent \(K\) and \(n\).
List - Double-click the position of the value to be changed in the list; an edit box becomes active. Enter the value in the active edit box.
Advanced - Opens the dialog for setting the variable ranges of the equation.
Graph - Opens a dialog that plots a graph.

Flow stress model 13¶

The Patchwise Temperature and Strain-rate model.

Dialog layout¶

flowstress-screen13

Input data¶

Number of strain rates - Select the number of strain rates used to represent \(K\) and \(n\).
Number of temperatures - Select the number of temperatures used to represent \(K\) and \(n\).
List - Double-click the position of the value to be changed in the list; an edit box becomes active. Enter the value in the active edit box.
Advanced - Opens the dialog for setting the variable ranges of the equation.
Graph - Opens a dialog that plots a graph.

Flow stress model 16¶

The General Power Law model.

Dialog layout¶

flowstress-screen16

Input data¶

Number of strain rates - Select the number of strain rates used to represent \(C\) and \(m\).
Number of temperatures - Select the number of temperatures used to represent \(C\) and \(m\).
List - Double-click the position of the value to be changed in the list; an edit box becomes active. Enter the value in the active edit box.
Advanced - Opens the dialog for setting the variable ranges of the equation.
Graph - Opens a dialog that plots a graph.

Flow stress model 170¶

The Hansel-Spittel model.

Dialog layout¶

flowstress-screen170

Input data¶

A - Enter A.
m1 - Enter m1.
m2 - Enter m2.
m3 - Enter m3.
m4 - Enter m4.
m5 - Enter m5.
m7 - Enter m7.
m8 - Enter m8.
m9 - Enter m9.
Yield strength - Enter the yield strength.
Advanced - Opens the dialog for setting the variable ranges of the equation.
Graph - Opens a dialog that plots a graph.

Flow stress model 18¶

The Hansel-Spittel model.

Dialog layout¶

flowstress-screen18

Input data¶

Yield strength - Enter the yield strength.
Strength coefficient - Enter the strength coefficient.
Strain hardening exponent - Enter the strain hardening exponent.
Strain rate constant - Enter the strain rate constant.
Reference effective strain rate - Enter the reference effective strain rate.
Melting point - Enter the melting point.
Room temperature - Enter the room temperature.
Temperature exponent - Enter the temperature exponent.
Advanced - Opens the dialog for setting the variable ranges of the equation.
Graph - Opens a dialog that plots a graph.

Consider temperature and strain rate¶

When this option is checked and the Setting button is clicked, the Cold material option dialog opens, in which the temperature and strain rate settings can be made.

Plastic model¶

Dialog layout¶

Input data¶

The plastic model is one of von-Mises / Hill 1948 / UMAT.

Hill 1948¶

UMAT¶

umat

Source file - Shows the path of the umat.for file.
Compiler - Select the type of Fortran compiler installed on the user's PC.
User values - Passes 10 real numbers to the PROPS parameter of SUBROUTINE UMAT.

      SUBROUTINE UMAT(STRESS,STATEV,DDSDDE,SSE,SPD,SCD,
     1 RPL,DDSDDT,DRPLDE,DRPLDT,
     2 STRAN,DSTRAN,TIME,DTIME,TEMP,DTEMP,PREDEF,DPRED,
     3 CMNAME,NDI,NSHR,NTENS,NSTATV,PROPS,NPROPS,
     4 COORDS,DROT,PNEWDT,CELENT,DFGRD0,DFGRD1,
     5 NOEL,NPT,LAYER,KSPT,KSTEP,KINC)

How to use¶

Source file - Click the ... button on the right and select the umat.for file.
After selecting the Compiler, click the Check button.
Enter the User values.
Click the Build button.
Close the dialog, or enter data in another tab.

Cautions¶

Warning

...

Note

The Plastic model tab is enabled only when Material model is set to elasto-plastic in the Process Information dialog.