SECTION 9MATERIALS презентация

multiple constitutive models (e.g. Elastic, Plastic, and Creep material properties, all assigned to one material name)
Material data can be obtained directly from the MSC.MVISION material database through the Materials Selector
Materials can be defined to vary as a function of temperature, strain, strain rate, time, and frequency

template customized to the selected analysis code
Three methods can be used to specify material properties
Manual Input(i.e. enter E, ν, ρ in the forms)
Materials Selector(i.e. import material data using MSC.Mvision
Externally Defined(i.e. create the material name label only, then, input the data in solver input file)

Elastic Constants)
2D Orthotropic 2-Dimensional orthotropic material (6 Elastic Constants)
3D Orthotropic 3-Dimensional orthotropic material (9 Elastic Constants)
2D Anisotropic 2-Dimensional anisotropic (6 Elastic Constants)
3D Anisotropic 3-Dimensional anisotropic (21 Elastic Constants)
Composite Various composite material models Laminate Composite (with a choice of stacking sequence convection) Rule of Mixtures Five Halpin-Tsai Models Short Fiber (1-D and 2-D)

thermal material
3D Orthotropic 3-Dimensional orthotropic thermal material
2D Anisotropic 2-Dimensional anisotropic thermal material
3D Anisotropic 3-Dimensional anisotropic thermal material
Composite Various composite material models (constant temperature) Laminate Composite Rule of Mixtures Five Halpin-Tsai Models Short Fiber (1-D and 2-D)

is used to activate/deactivate constitutive models
Existing materials may be used as a template to create new materials, i.e. use session file or template database

Elastic
Nonlinear Elastic
Creep
The property value data boxes are customized for the analysis code and the constitutive model used
When an input databox allows the use of a field, the field listbox will appear, e.g. Temperature Dep/Model Variable Fields

button to obtain the form shown here
Existing constitutive models of a material will appear in either the Active or Inactive list boxes
Selection of a constitutive model from a list box would move it to the other list box. (e.g. from Active to Inactive)
Only active constitutive material models will be used by MSC.Patran

where material constants are loaded into the solver input file (e.g. *.bdf file) externally to MSC.Patran
The material name created can be used in the physical property (Element Properties) specifications
Input Properties are ghosted out as the user is not allowed to enter material data inside MSC.Patran

stored in any MSC/MVISION databank
MSC/MVISION uses a relational database in which the material data is stored in spreadsheet tabular format
Attributes are displayed through the “Column Headers”
“Query” sets criteria to sort materials data
Allows fast search of material properties
Exports material data automatically to solvers such as MSC.Nastran, MSC.Marc, ABAQUS, etc.
Provides for conversion of unites from the databanks into the solver’s units

Elements for Aerospace Vehicle Structures
MIL-HDBK-17 Based on the Military Handbook of Plastics for Aerospace Vehicles, Part1-Reinforced Plastics
PMC-90 Engineering Data on Advanced Composite Materials from UDRI
Producer Databanks Based on Manufacturer’s Datasheets for Plastics, Metals, Ceramics, and Composites
Materials Selector Based on Machine Design’s 1994 edition of Materials Databank Selector
ASM structural Data on Structural Steels from Batelle, ASM, AND SAE Steels Handbooks
GE Plastics Engineering and design data on GE Plastics and Databank Resins
Fatigue Databank Collection of typical fatigue data for engineering materials
Fiber Databank Collection of typical composite fiber test data
Thermal Databank Collection of typical thermal data for engineering materials
Electromagnetic Collection of typical electromagnetic data for a broad Materials Library range of materials

from the MSC.Materials Selector list
Combinations of attributes and operators can be used to build the query command

Example: CNAME like ‘*Alum*’ and YS11T > 7e4
Query command can be entered directly in Material Selector Query Panel form

Action
Material properties are shown in tabular form
Material compliance or stiffness matrices can be shown

shown
Material stiffness/compliance may be inspected

can be done
Store material data in session file(s)
At any time, begin recording to a new session file, File/Session/Record/Apply
Enter material data into Patran database, e.g. Materials/Create/3D Anisotropic/ Manual Input
When completed creating material set(s), stop recording to session file, File/Session/Record/Stop
The material data can be specified in a database by using File/Session/Play…
Store material data in new Patran template database
Create new Patran database using empty Patran template database, base.db
Load Patran solver preference at Patran command line, e.g. load_mscnastran()
Create material set(s)
Close database and save it as a new template