PAT312, Section 31, December 2006 S31-3 Copyright 2007 MSC.Software Corporation MATERIAL PROPERTY DATA l mat.dat file contains material property data l Created automatically by MSC.Patran l Written to the job name subdirectory l Contents generated from 4 sources l Materials form l Field/Material Property/General form l Element Properties form: Thermal Material database (MID ) entry l User created mat.dat.apnd data l Text mat.dat file may be viewed with an editor l Printed in qout.dat if input data echo is checked on
PAT312, Section 31, December 2006 S31-4 Copyright 2007 MSC.Software Corporation MATERIAL PROPERTY DATA l Material property data has the following format: l Data fields are separated by at least one space MPIDMPID#IEVALITSCALFACTOR MDATA l MPID:Required keyword (all caps) l MPID#:Material property identification number (MPID) l IEVAL:Function evaluation code l ITSCAL:Temperature scale for function evaluation l FACTOR:Scaling factor applied to the resultant property l MDATA:One or more lines of material data l MDATA format varies depending on selected IEVAL type
PAT312, Section 31, December 2006 S31-5 Copyright 2007 MSC.Software Corporation l A: Arbitrary Order Polynomial l B: Bingham Equation l C: Constant l T:Tables l H:Hermite Polynomial l L:Linear Computed Interval Table l M: Straight Line l PH:Phase Change Data l P:Power Series l R:Reciprocal l S:Sutherland Equation l U:User Supplied Subroutine IEVAL KEY LETTERS
PAT312, Section 31, December 2006 S31-6 Copyright 2007 MSC.Software Corporation ITSCAL KEY LETTERS l F:Fahrenheit l C:Celsius l K:Kelvin l R:Rankine l T:Time l Text lines after MPID line are treated as comments l MDATA line provides required parameters or tabular data l Number and order of data as required by IEVAL l At least one parameter per MDATA line, may be more l Tabular MDATA data has two tabular data values per line (u,v pairs) l Only the first character of the ITSCAL and IEVAL designations is significant
PAT312, Section 31, December 2006 S31-8 Copyright 2007 MSC.Software Corporation STRAIGHT LINE (M): The straight line will evaluate the MDATA1 and MDATA2 values that you enter exactly as follows: Example MPID 9MKelvin1.0 Example Straight Line Material Property MDATA / This material property definition declares that MPID 9 is a straight line of the form: with T valid for degrees Kelvin and with a scale factor of 1.0. The evaluation option (IEVAL) was given as M (Straight Line). Only the first character, M, is significant. For a detailed description of inputs for other IEVALS, please refer to MSC.Patran Thermal Users Manual MATERIAL PROPERTY DATA
PAT312, Section 31, December 2006 S31-9 Copyright 2007 MSC.Software Corporation MATERIAL PROPERTY DATA PHASE CHANGE DATA (PH): The phase change data option allows you to input phase transition temperature - latent heat data pairs. Each MDATA1 value is a phase transition temperature, and each MDATA2 value is the corresponding latent heat. You may have as many MDATA1/MDATA2 pairs as necessary for your model (there is no coded limit). These pairs must be input in ascending temperature order. For accuracy, it is also necessary that no single node should undergo more than one phase transition per time step. Example MPID1023PHKelvin1.0 Example #1 Phase Change Data Set MDATA ;T=600,H= / MPID1PHRankine1.1 Example #2 Phase Change Data Set MDATA E+06;T1= ,H1=1.97E+06 MDATA E+05;T2= 948.7,H2=2.00E+05 /
PAT312, Section 31, December 2006 S31-10 Copyright 2007 MSC.Software Corporation MATERIAL PROPERTY DATA POWER SERIES (PO): The power series will evaluate the MDATA1 and MDATA2 values that you enter as follows: Example MPID49PORankine1.0 Example Power Series Material Property Definition MDATA MDATA MDATA1.0E / This example material property definition declares that MPID 49 is a power series function of the form: Where T is valid for degrees Rankine. The scale factor is 1.0.
PAT312, Section 31, December 2006 S31-11 Copyright 2007 MSC.Software Corporation MATERIAL PROPERTY DATA RECIPROCAL FUNCTION (R): The Reciprocal function will evaluate the MDATA1 and MDATA2 values that are entered exactly as follows: Example MPID10RCelsius1.0 Example Reciprocal Function Material Property MDATA / This material property definition declares that MPID 10 is a Reciprocal function of the form: with T valid for degrees Celsius and with a scale factor of 1.0. IEVAL was given as Reciprocal Function. Only the first character, R, is significant. A common use of this type of material property is to define bulk coefficients of expansion for ideal gases (1/T absolute).
PAT312, Section 31, December 2006 S31-12 Copyright 2007 MSC.Software Corporation MATERIAL TEMPLATE l MSC.Thermal works on a pointer structure l MID:Material ID number l MPID:Individual material property ID numbers l Each MID has several associated MPIDs l An MID template is a list of corresponding MPIDs l MID to MPID correspondence is written in the template.dat file in the job sub-directory l Each MPID number refers to a data set in the mat.dat file l Can be time or temperature dependent l Reference user supplied subroutines for material property data l Has appropriate MDATA entries
PAT312, Section 31, December 2006 S31-13 Copyright 2007 MSC.Software Corporation MATERIAL TEMPLATE l An example of an MID template in template.dat: …………………………MPIDs…………………………….. * MIDKxkykzRhoCpDel_H MID l Any element referencing MID 1001 will use MPIDs l Kx, Ky and Kz are the MPIDs for thermal conductivity in the global X, Y and Z directions. l Orthotropic materials use MPIDs , and l Orthotropic orientations are applied in Element Properties l Rho is the density of the material l Cp is the specific heat of the material l Del_H is the phase change MPID (temperature and latent heat) l Input 0 for Del_H if material will not undergo a phase change
PAT312, Section 31, December 2006 S31-14 Copyright 2007 MSC.Software Corporation MATERIAL PROPERTIES AND TEMPLATES l Material Properties and/or Material Templates l Created in MSC.Patran under Materials l Translated into mat.dat file format l Corresponding MID template written in template.dat l mat.dat and template.dat reside in the job sub-directory l Translation is performed at Analysis/Apply
PAT312, Section 31, December 2006 S31-15 Copyright 2007 MSC.Software Corporation MATERIAL PROPERTIES AND TEMPLATES l In Materials, Isotropic or 3D orthotropic materials can be created l Input properties, select Thermal Properties or Thermal Templates l MPIDs for conductivity, density, etc are pointers into the mat.dat file l Thermal properties can be input as constants or select an existing material property field.
PAT312, Section 31, December 2006 S31-16 Copyright 2007 MSC.Software Corporation MATERIAL PROPERTIES AND TEMPLATES l For 3D orthotropic materials, supply l Conductivity or conductivity MPIDs in X, Y, and Z l Orientation angles default to Global XYZ l Provide orientation angles in Element Properties
PAT312, Section 31, December 2006 S31-17 Copyright 2007 MSC.Software Corporation MATERIAL PROPERTY FIELDS l Variation of Material Property with time or temperature can be defined through Material Property fields l Function terms list corresponds to the IEVAL types l Select the desired Function (IEVAL) to display the input form and enter appropriate data
PAT312, Section 31, December 2006 S31-18 Copyright 2007 MSC.Software Corporation MATERIAL PROPERTY FIELDS l User input MPID l Default MPID is arbitrary l MPIDs output to mat.dat l Select the Independent variable type l Temperature l Temperature units l Time l Enter appropriate data l See mathematical expression and/or diagram at top of form
PAT312, Section 31, December 2006 S31-19 Copyright 2007 MSC.Software Corporation USING THE MSC.THERMAL MATERIAL PROPERTIES DATABASE l Materials database included with MSC.Thermal l Contains 970+ materials l Temperature dependent tabular data l Provides: l conductivity, density, specific heat and phase change l Provided in 4 systems of units: l MKS, CGS, FPH and IPS l Select units in Analysis, Translation Parameters l MIDs 1 through 1000 reserved for the supplied materials l Cross reference MIDs to materials: l Utilities, Thermal Tools l Text version located in P3_HOME/p3thermal_files/lib
PAT312, Section 31, December 2006 S31-20 Copyright 2007 MSC.Software Corporation USING THE MSC.THERMAL MATERIAL PROPERTIES DATABASE l Enter an MID for a supplied material in the Element Property form. l e.g. MID 1 corresponds to pure aluminum l MPIDs 101, 104, 106 and 106
PAT312, Section 31, December 2006 S31-21 Copyright 2007 MSC.Software Corporation USER ENTRIES TO MAT.DAT (mat.dat.apnd) l Use of mat.dat.apnd is optional* l All conduction and capacitance data can be input using: l Materials form l Field, Material Property General forms l Element property forms l Create mat.dat.apnd file via a text editor l Format, IEVAL, ITSCAL, etc. are same as mat.dat l Must observe syntax for MPID and MDATA lines l Locate in same directory as Patran database l Automatically read by submit script l Appended to mat.dat created by MSC.Thermal *mat.dat.apnd is necessary for convection configuration fluid properties: viscosity, fluid conductivity, etc. not input via Patran forms