S9-1PAT301, Section 9, October 2003 SECTION 9 MATERIALS. - презентация

1 S9-1PAT301, Section 9, October 2003 SECTION 9 MATERIALS

2 S9-2PAT301, Section 9, October 2003

3 S9-3PAT301, Section 9, October 2003 MATERIALS Material model is a named group of individual properties Materials can have 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

4 S9-4PAT301, Section 9, October 2003 MATERIAL PROPERTY CREATION Material properties are entered in an easy to use template customized to the selected analysis code Three methods can be used to specify material properties Manual Input(i.e. enter E,, 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)

5 S9-5PAT301, Section 9, October 2003 MATERIAL PROPERTY CREATION (Cont.) Supported Elastic Structural Material Models IsotropicIsotropic structural material (2 Elastic Constants) 2D Orthotropic2-Dimensional orthotropic material (6 Elastic Constants) 3D Orthotropic3-Dimensional orthotropic material (9 Elastic Constants) 2D Anisotropic2-Dimensional anisotropic (6 Elastic Constants) 3D Anisotropic3-Dimensional anisotropic (21 Elastic Constants) CompositeVarious 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)

6 S9-6PAT301, Section 9, October 2003 MATERIAL PROPERTY CREATION (Cont.) Supported Thermal Material Properties IsotropicIsotropic thermal material 2D Orthotropic2-Dimensional orthotropic thermal material 3D Orthotropic3-Dimensional orthotropic thermal material 2D Anisotropic2-Dimensional anisotropic thermal material 3D Anisotropic3-Dimensional anisotropic thermal material CompositeVarious composite material models (constant temperature) Laminate Composite Rule of Mixtures Five Halpin-Tsai Models Short Fiber (1-D and 2-D)

7 S9-7PAT301, Section 9, October 2003 MATERIAL PROPERTY CREATION (Cont.) Variable properties are defined using fields Change Material Status 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

8 S9-8PAT301, Section 9, October 2003 MATERIAL PROPERTY INPUT First, the constitutive model of interest must be selected Linear 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

9 S9-9PAT301, Section 9, October 2003 ACTIVATING/DEACTIVATION MATERIAL MODELS Click on the 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

10 S9-10PAT301, Section 9, October 2003 ISOTROPIC MATERIAL MODEL EXAMPLE Create an Isotropic material data set for MSC.Nastran as follows: Make the Elastic Constitutive model Active and the Elastoplastic constitutive model Inactive E = 30 x 10 6 psi = 0.30 y = psiHardening slope = 7000 psi

11 S9-11PAT301, Section 9, October 2003 ISOTROPIC MATERIAL MODEL EXAMPLE (Cont.) 1. Specify the material name 2. Choose Linear Elastic as the Constitutive Model 3. Enter the elastic properties and Apply

12 S9-12PAT301, Section 9, October 2003 ISOTROPIC MATERIAL MODEL EXAMPLE (Cont.) 4. Change Constitutive Model to Elastoplastic 5. Choose Hardening Slope (to define the non-linear portion of the stress-strain curve), input the values and Apply 6. From the Materials menu, select Change Material Status, deactivate the Elastoplastic constitutive model and Apply

13 S9-13PAT301, Section 9, October 2003 COMPOSITE MATERIAL MODEL EXAMPLE Create a nine-layered composite material with the following properties MSC.Nastran is from CQUAD4 x material axis, e.g. at x material axis = 0 ABAQUS is from projection of Patran global X axis onto shell element, or from Element Properties Orientation System(CID) E 11 = 40e6E 22 = 1e6 n 12 = 0.25 G 12 = G 13 = 0.6e6G 23 = 0.5e6.01/.0125/.01/.0125/.01/.0125/.01/.0125/.01/ 0/90/0/90/0/90/0/90/0/ Base ply material Ply thickness Ply orientation (longitudinal direction),

14 S9-14PAT301, Section 9, October 2003 COMPOSITE MATERIAL MODEL EXAMPLE (Cont.) 1. Create the ply material (2-D orthotropic) 2. Enter 2-D orthotropic material property data

15 S9-15PAT301, Section 9, October 2003 COMPOSITE MATERIAL MODEL EXAMPLE (Cont.) 3. Create the composite using the ply material 4. Specify ply material thickness and orientations

16 S9-16PAT301, Section 9, October 2003 EXTERNALLY DEFINED MATERIALS Used to define set names for proprietary material properties 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

17 S9-17PAT301, Section 9, October 2003 MATERIALS SELECTOR/ MVISION OVERVIEW Materials Selector provides direct access to material data 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 solvers units

18 S9-18PAT301, Section 9, October 2003 MSC/MVISION DATABANKS AVAILABLE MIL-HDBD-5Based on The Military Handbook for Metallic Materials and Elements for Aerospace Vehicle Structures MIL-HDBK-17Based on the Military Handbook of Plastics for Aerospace Vehicles, Part1-Reinforced Plastics PMC-90Engineering Data on Advanced Composite Materials from UDRI Producer DatabanksBased on Manufacturers Datasheets for Plastics, Metals, Ceramics, and Composites Materials Selector Based on Machine Designs 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 DatabankCollection of typical fatigue data for engineering materials Fiber DatabankCollection of typical composite fiber test data Thermal DatabankCollection of typical thermal data for engineering materials Electromagnetic Collection of typical electromagnetic data for a broad Materials Library range of materials

19 S9-19PAT301, Section 9, October 2003 MATERIAL SELECTOR QUERY PANEL Criteria can be set to filter irrelevant 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

20 S9-20PAT301, Section 9, October 2003 SHOW MATERIAL PROPERTIES Created material properties can be verified using the Show Action Material properties are shown in tabular form Material compliance or stiffness matrices can be shown

21 S9-21PAT301, Section 9, October 2003 STIFFNESS/COMPLIANCE MATRIX The status of each of the constitutive models may be shown Material stiffness/compliance may be inspected

22 S9-22PAT301, Section 9, October 2003 AVOID RE-ENTERING MATERIAL PROPERTY DATA There are at least two ways this can be done 1. Store material data in session file(s) 1. At any time, begin recording to a new session file, File/Session/Record/Apply 2. Enter material data into Patran database, e.g. Materials/Create/3D Anisotropic/ Manual Input 3. When completed creating material set(s), stop recording to session file, File/Session/Record/Stop 4. When need the material data can play the session files(s) into a database 2. Store material data in new Patran template database 1. Create new Patran database using empty Patran template database, base.db 2. Load Patran solver preference at Patran command line, e.g. load_mscnastran() 3. Create material set(s) 4. Close database and save it as a new template