Chapter Nine CAD Parameters CAD Parameters Chapter Overview

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Chapter Nine CAD & Parameters

Chapter Nine CAD & Parameters

CAD & Parameters Chapter Overview Training Manual In this chapter, interoperability with CAD software

CAD & Parameters Chapter Overview Training Manual In this chapter, interoperability with CAD software as well as parameters will be discussed. • The following will be covered: A. CAD Interoperability B. Multiple Design Studies C. Design. Xplorer (Parameter Manager) • The capabilities described in this section are generally applicable to all ANSYS licenses. However, some CAD functionality are specific to certain CAD software, so these will be designated accordingly. ANSYS Workbench – Simulation • – Not all CAD software have the same features, so there are some differences in CAD-related functionality which is supported in Simulation August 26, 2005 Inventory #002265 9 -2

CAD & Parameters A. CAD Interoperability As noted in Chapter 1, the following Geometry

CAD & Parameters A. CAD Interoperability As noted in Chapter 1, the following Geometry Interfaces are supported in Simulation: – The Geometry Interface license can be run in reader mode for all licenses. The Geometry Interface can be run in plug-in mode for the CAD software listed under “Associative” • • ANSYS Workbench – Simulation • Training Manual Detailed CAD support listing in Simulation online help IGES Geometry Interface reader is free August 26, 2005 Inventory #002265 9 -3

CAD & Parameters … Design. Modeler & CAD Training Manual Design. Modeler has a

CAD & Parameters … Design. Modeler & CAD Training Manual Design. Modeler has a similar look and feel to Simulation Design. Modeler can be used to create geometry in lieu of other CAD software Design. Modeler can also read in parts and assemblies from the same CAD sources as Simulation. These models can be prepared and modified for analysis, then attached in Simulation ANSYS Workbench – Simulation • Design. Modeler is a Workbench module allowing users to create or prepare models for use in Simulation August 26, 2005 Inventory #002265 9 -4

CAD & Parameters … CAD Interoperability Training Manual ANSYS Workbench – Simulation • There

CAD & Parameters … CAD Interoperability Training Manual ANSYS Workbench – Simulation • There are various items which can be brought in from supported CAD systems when models are attached: – Geometry import – Spot weld import – Parameter import – Material property import – Coordinate system import – Named selection import – Motion loads import – CAD attribute processing • There are three ways of setting import preferences when attaching CAD geometry. – Three methods – one through the Workbench Projects page, another in Simulation Geometry branch, the third in Options… box – will be discussed next. August 26, 2005 Inventory #002265 9 -5

CAD & Parameters … Controlling CAD Settings Training Manual – These settings only affect

CAD & Parameters … Controlling CAD Settings Training Manual – These settings only affect the existing model ANSYS Workbench – Simulation – When importing models in Workbench Project page, the left side controls various CAD-related settings August 26, 2005 Inventory #002265 9 -6

CAD & Parameters … Controlling CAD Settings Training Manual – These settings only affect

CAD & Parameters … Controlling CAD Settings Training Manual – These settings only affect the existing model Model shown is from a sample Inventor assembly. ANSYS Workbench – Simulation – On the other hand, after a model is already imported into Simulation, CAD-related settings can be changed under the Geometry branch August 26, 2005 Inventory #002265 9 -7

CAD & Parameters … Controlling CAD Settings Training Manual – “Options” dialog box also

CAD & Parameters … Controlling CAD Settings Training Manual – “Options” dialog box also accessible from Workbench Start page in lower-left corner. ANSYS Workbench – Simulation • To change default behavior, go to “Tools menu > Common Settings: Geometry Import” to change default behavior August 26, 2005 Inventory #002265 9 -8

CAD & Parameters … Geometry Import Training Manual – One cannot import a part

CAD & Parameters … Geometry Import Training Manual – One cannot import a part with mixed solids and surfaces. – Assemblies with mixed solids and surfaces are OK. – In other situations, users may wish only to import a particular entity type to ignore unnecessary or construction geometry present in the model – Hence, toggling import of solids, surfaces, and/or line bodies is possible ANSYS Workbench – Simulation • For CAD-related settings, importing solid, surface, or line bodies is available August 26, 2005 Inventory #002265 9 -9

CAD & Parameters … Geometry Import (Solid Bodies) Training Manual – Contact regions will

CAD & Parameters … Geometry Import (Solid Bodies) Training Manual – Contact regions will automatically be detected between parts in an assembly. • Note that the CAD mating relationship information is not used • Slider controls contact detection tolerance (in ANSYS Professional licenses and above, user can specify value in length units) Model shown is from a sample Solid. Works assembly. ANSYS Workbench – Simulation • Import of solid bodies is supported for all CAD systems August 26, 2005 Inventory #002265 9 -10

CAD & Parameters … Geometry Import (Solid Bodies) Training Manual – A multi-body part

CAD & Parameters … Geometry Import (Solid Bodies) Training Manual – A multi-body part is a group of solid bodies. Instead of using different mesh and contact regions between solid bodies, the bodies within a part will share nodes at common interfaces Individual Bodies (non-matching mesh) Single Part (matching mesh) ANSYS Workbench – Simulation • Design. Modeler has concept of “multi-body parts” August 26, 2005 Inventory #002265 9 -11

CAD & Parameters … Geometry Import (2 D Solid Bodies) Training Manual Once imported,

CAD & Parameters … Geometry Import (2 D Solid Bodies) Training Manual Once imported, the 2 D details can be specified from the Part branch. Plane stress, plane strain or axisymmetric ANSYS Workbench – Simulation • Before importing 2 D geometry you must specify “Analysis Type” is “ 2 D” in the Advanced Geometry options August 26, 2005 Inventory #002265 9 -12

CAD & Parameters … Geometry Import (Surface Bodies) Training Manual – For ANSYS Professional

CAD & Parameters … Geometry Import (Surface Bodies) Training Manual – For ANSYS Professional licenses and above, surface body contact is available from the Contact branch – Spot weld definitions can also be used for surface assemblies ANSYS Workbench – Simulation • Simulation also supports import of surface bodies from most CAD systems August 26, 2005 Inventory #002265 9 -13

CAD & Parameters … Geometry Import (Surface Bodies) Training Manual – Instead of using

CAD & Parameters … Geometry Import (Surface Bodies) Training Manual – Instead of using spot welds or edge contact, “joints” in Design. Modeler can ensure that surface bodies share nodes – Surfaces that share edges can also form a part to share nodes Individual Bodies (non-matching mesh) Part of Surface Bodies (matching mesh) ANSYS Workbench – Simulation • In Design. Modeler, “joints” can be used to merge surface bodies together to a “part” August 26, 2005 Inventory #002265 9 -14

CAD & Parameters … Geometry Import (Line Bodies) Training Manual – Line bodies require

CAD & Parameters … Geometry Import (Line Bodies) Training Manual – Line bodies require cross-section definition and orientation, which only Design. Modeler supplies – Line bodies are meshed with beam/link elements – Line bodies can be used in conjunction with surface bodies ANSYS Workbench – Simulation • Line bodies can be imported from Design. Modeler only August 26, 2005 Inventory #002265 9 -15

CAD & Parameters … CAD Associativity Training Manual – Turning off CAD associativity will

CAD & Parameters … CAD Associativity Training Manual – Turning off CAD associativity will make import faster but will not allow updating the CAD geometry if changes are made ANSYS Workbench – Simulation • CAD associativity allows updating the CAD geometry in Simulation without redefining material properties, loads, supports, etc. August 26, 2005 Inventory #002265 9 -16

CAD & Parameters … Save Updated Model (Reader Mode) Training Manual – For Unigraphics,

CAD & Parameters … Save Updated Model (Reader Mode) Training Manual – For Unigraphics, if the part is updated in reader mode, the updated file can be saved ANSYS Workbench – Simulation • When a model is attached in Simulation without opening the geometry in the CAD system, this is referred to as “Reader Mode” August 26, 2005 Inventory #002265 9 -17

CAD & Parameters … Do Smart Update – Currently, only Inventor and Unigraphics support

CAD & Parameters … Do Smart Update – Currently, only Inventor and Unigraphics support “Smart Update” feature ANSYS Workbench – Simulation • “Smart Update” speeds assembly updates since only modified components of the assembly are updated Training Manual August 26, 2005 Inventory #002265 9 -18

CAD & Parameters … Attach File via Temp File Training Manual – For extremely

CAD & Parameters … Attach File via Temp File Training Manual – For extremely large models the geometry can be read to a temporary file which reducing RAM memory demands – If set to “Yes” a location for the temporary directory can be specified by the user ANSYS Workbench – Simulation • Attach File Via Temp File: August 26, 2005 Inventory #002265 9 -19

CAD & Parameters … Spot Weld Import Training Manual – Although Simulation has some

CAD & Parameters … Spot Weld Import Training Manual – Although Simulation has some limited spot weld definition capabilities (at vertices only), spot welds can be defined more easily in Design. Modeler and Unigraphics and then imported into Simulation. ANSYS Workbench – Simulation • Spot welds can be used for surface assemblies Not all CAD software support spot weld definitions in a manner usable by Simulation August 26, 2005 Inventory #002265 9 -20

CAD & Parameters … Parameter Import – When On (default), any dimension name which

CAD & Parameters … Parameter Import – When On (default), any dimension name which contains the personal parameter key (default is “DS”) will be imported into Simulation as a parameter – CAD parameters will appear in the Details view for the Model – The use of CAD parameters will be covered in the next section ANSYS Workbench – Simulation • Dimensions of CAD features can be imported into Simulation Training Manual August 26, 2005 Inventory #002265 9 -21

CAD & Parameters … Parameter Import Training Manual – Design. Modeler: checkmark the dimension,

CAD & Parameters … Parameter Import Training Manual – Design. Modeler: checkmark the dimension, provide Parameter name – Pro/ENGINEER: select dimension, right-click “Properties” – Unigraphics: select dimension and “Edit” – Solid. Works: select dimension, right-click “Properties” – Inventor: select dimension, right-click “Dimension Properties” – Solid Edge: select dimension, right-click “Edit Formula, ” change name – Mechanical Desktop: “Part > Design Variables” and define parameter name. Then change dimension to parameter via “Edit Dimensions” Sample dialog boxes to change dimension name in CAD software ANSYS Workbench – Simulation • Each CAD software has different ways to change the dimension name, so please refer to the CAD documentation August 26, 2005 Inventory #002265 9 -22

CAD & Parameters … Material Property Import Training Manual • The following properties will

CAD & Parameters … Material Property Import Training Manual • The following properties will be imported: Not all CAD software support all material property definition which Simulation supports. Materials imported from CAD will appear in “Engineering Data” branch and will be assigned correctly to parts. – Note that Simulation will not import UG properties in table form (such as temperature-dependent data) – If the material type is changed in CAD, this will be reflected in an update. However, if the values of the material property change in CAD, this will not update to prevent overwriting of user-defined values in Simulation. ANSYS Workbench – Simulation • If “Material Properties Transfer” is enabled, material properties, if defined, will be imported from supported CAD systems August 26, 2005 Inventory #002265 9 -23

CAD & Parameters … Material Property Import Training Manual – Design. Modeler: will import

CAD & Parameters … Material Property Import Training Manual – Design. Modeler: will import materials from Pro. E, UG, Inventor, but user cannot define material properties inside of DM directly – Pro/ENGINEER: “Edit > Setup: Material > Define/Assign” – Unigraphics: “Tools > Material Properties” – Inventor (to define materials): “Format > Materials” Inventor (to assign): right-click part “Properties: Physical tab” Sample dialog boxes to assign/define material properties in CAD software ANSYS Workbench – Simulation • Each CAD system has different ways to define and assign materials, so please refer to the CAD documentation August 26, 2005 Inventory #002265 9 -24

CAD & Parameters … Coordinate System Import Training Manual • Simulation supports importing local

CAD & Parameters … Coordinate System Import Training Manual • Simulation supports importing local coordinate systems from some CAD systems – User-defined CS on part or assembly level will be imported – Modified/added CS are updated with model ANSYS Workbench – Simulation • Coordinate systems allow users to define the orientation for direction-dependent loads or contour results August 26, 2005 Inventory #002265 9 -25

CAD & Parameters … Coordinate System Import Training Manual – Design. Modeler: create Plane,

CAD & Parameters … Coordinate System Import Training Manual – Design. Modeler: create Plane, Details view: Export CS – Pro/ENGINEER: “Insert > Model Datum > Coordinate System” – Solid. Works: “Insert > Reference Geometry > Coordinate System” Sample dialog boxes to define coordinate systems in CAD software ANSYS Workbench – Simulation • Each CAD system has different ways to define coordinate systems, so please refer to the CAD documentation August 26, 2005 Inventory #002265 9 -26

CAD & Parameters … Named Selections Import – Named selections import is enabled in

CAD & Parameters … Named Selections Import – Named selections import is enabled in the geometry preferences – “Groups” from the CAD model which contain the specified prefix (default is “NS”), are imported in the Named Selection branch of Simulation ANSYS Workbench – Simulation • If “groups” are defined in the CAD package, these can be imported to Simulation as Named Selections. Training Manual August 26, 2005 Inventory #002265 9 -27

CAD & Parameters … Named Selections Import Training Manual • Since different CAD systems

CAD & Parameters … Named Selections Import Training Manual • Since different CAD systems provide different levels of API support, the capabilities for Named Selection processing will vary ANSYS Workbench – Simulation • Named Selection processing features are related to CAD API functionality. August 26, 2005 Inventory #002265 9 -28

CAD & Parameters … Named Selections Import Training Manual – Design. Modeler: “Tools >

CAD & Parameters … Named Selections Import Training Manual – Design. Modeler: “Tools > Named Selections” – Pro/ENGINEER: “Edit > Setup: Name > Other” – Unigraphics: select entities, right-click “Properties” Sample dialog boxes to create “named selections” in CAD software ANSYS Workbench – Simulation • Each CAD system has different ways to rename geometric entities, so please refer to the CAD documentation August 26, 2005 Inventory #002265 9 -29

CAD & Parameters … CAD Attribute Import Training Manual – For example, if a

CAD & Parameters … CAD Attribute Import Training Manual – For example, if a CAD system uses a supported kinematics program, the motion loads can be imported into Simulation for subsequent stress analyses – If this feature is turned on, the prefix can be specified. Only attributes with the given prefix (default is “SDFEA” or “DDM”) will be imported into Simulation. ANSYS Workbench – Simulation • The CAD Attribute Import capability can be used to import attribute information from CAD software, including motion loads August 26, 2005 Inventory #002265 9 -30

CAD & Parameters B. Multiple Design Studies Training Manual One may wish to compare

CAD & Parameters B. Multiple Design Studies Training Manual One may wish to compare the results of two different load cases, as shown here ANSYS Workbench – Simulation • Copying branches in the Outline Tree allow users to easily compare different Environments or even different Models August 26, 2005 Inventory #002265 9 -31

CAD & Parameters … Multiple Design Studies – Duplicate the Environment to solve multiple

CAD & Parameters … Multiple Design Studies – Duplicate the Environment to solve multiple load cases or different types of analyses (static, modal, etc. ) – Duplicate the Model branch to compare different material properties, geometry configurations, contact conditions, mesh densities, etc. • After duplicating the appropriate branch make the necessary changes and then resolve the model ANSYS Workbench – Simulation • Set up multiple design studies by duplicating a branch: Training Manual August 26, 2005 Inventory #002265 9 -32

CAD & Parameters … Multiple Design Studies Training Manual Select which branches you want

CAD & Parameters … Multiple Design Studies Training Manual Select which branches you want to include in the HTML Report prior to generating it. All input, results, and figures will be included for each branch and labeled appropriately. ANSYS Workbench – Simulation • The HTML Report can contain all the cases solved August 26, 2005 Inventory #002265 9 -33

CAD & Parameters … Updating Geometry Training Manual – After modifying the CAD geometry

CAD & Parameters … Updating Geometry Training Manual – After modifying the CAD geometry select the desired Geometry branch, then choose “Geometry > Update: Use Geometry Parameter Values” from the Context toolbar – the geometry for the selected branch will be updated while other branches will not ANSYS Workbench – Simulation • When dealing with multiple geometry configurations and you wish to retain each version: August 26, 2005 Inventory #002265 9 -34

CAD & Parameters … Updating Geometry Example Training Manual – The Model branch was

CAD & Parameters … Updating Geometry Example Training Manual – The Model branch was duplicated to “Model 2” – “Model 2” was selected and the new geometry was updated – All material assignment, mesh controls, (contact regions), and loads and supports were updated without manual intervention ANSYS Workbench – Simulation • Example: geometry changes were made in the CAD software. August 26, 2005 Inventory #002265 9 -35

CAD & Parameters … Sending Parameters and Updating Another way of updating the geometry

CAD & Parameters … Sending Parameters and Updating Another way of updating the geometry from within Simulation, is by importing CAD parameters, modifying them and choosing “Update > Update: Use Simulation Parameter Values” • Simulation sends the parameters to the CAD software, regenerates the new model and sends it back to Simulation – Note: • changes in dimensions must be such that valid geometry can be created or the update will fail • Topology changes can require some entity assignments (e. g. , loading on a surface) to be redefined since the original item (such as a surface) is redefined ANSYS Workbench – Simulation • Training Manual August 26, 2005 Inventory #002265 9 -36

CAD & Parameters … Updating Geometry Notes Training Manual – If force was applied

CAD & Parameters … Updating Geometry Notes Training Manual – If force was applied on a surface and the surface area increased, the force magnitude remains the same but the force per unit area decreases – If pressure was applied on a surface and the surface area increased, the pressure value remains the same but the resulting force being applied on the surface will increase • The orientation of loads will not change – For structural loads, if a direction is specified using existing geometry, the direction of the load will not change even though the geometry used for load orientation has changed ANSYS Workbench – Simulation • The magnitude of loads will remain constant August 26, 2005 Inventory #002265 9 -37

CAD & Parameters … Multiple Design Studies Training Manual – For example, if a

CAD & Parameters … Multiple Design Studies Training Manual – For example, if a user wants to only solve a single Environment, select that Environment branch from the Outline Tree and click on the Solve button – To solve all Environment or Model branches, select the parent branch and click on the Solve button. – To solve multiple Environment or Model branches, Ctrl-select the branches of interest, then click on the Solve button. ANSYS Workbench – Simulation • To solve multiple branches at once, go to the parent branch and click on the Solve button August 26, 2005 Inventory #002265 9 -38

CAD & Parameters C. Design. Xplorer Training Manual – Although available in release 10.

CAD & Parameters C. Design. Xplorer Training Manual – Although available in release 10. 0, the Parameter Manager feature will be removed in future releases of Simulation ANSYS Workbench – Simulation • Beginning with Workbench Simulation release 10. 0 the use of the Parameter Manager to control design studies has been replaced with the Design. Xplorer application August 26, 2005 Inventory #002265 9 -39

CAD & Parameters D. Parameter Manager Training Manual – In the case of multiple

CAD & Parameters D. Parameter Manager Training Manual – In the case of multiple Model branches, the Simulation database can become large because the mesh and results for each Model branch will be stored – For many cases, this may be a tedious, manual method • In some situations where many cases are being examined, the use of Design. Xplorer may be warranted – Design. Xplorer displays the effect changes of input values have on various output quantities in tabular and graphical form ANSYS Workbench – Simulation • Performing multiple design studies by duplicating the Model or Environment branch is an easy way to compare results August 26, 2005 Inventory #002265 9 -40

CAD & Parameters … Understanding Parameters In Simulation, input and output parameters are managed

CAD & Parameters … Understanding Parameters In Simulation, input and output parameters are managed using the Design. Xplorer application – If a field in the Details view has a square next to it, it can be toggled on/off to be used as a parameter • White fields indicate input parameter • Gray fields indicate output parameter – Click in the square and a blue “P” will appear, indicating that this quantity can now be used with Design. Xplorer Example of input parameters Example of output parameters ANSYS Workbench – Simulation • Training Manual August 26, 2005 Inventory #002265 9 -41

CAD & Parameters … Using Design. Xplorer Training Manual – Browse through the Outline

CAD & Parameters … Using Design. Xplorer Training Manual – Browse through the Outline tree and activate any input parameters which will be used (add blue “P”) – Browse through the Solution branch and activate any output parameters to be used (add blue “P”) • Use of Results Scoping (covered in Chapter 8) allows the user to query the local results. For example, by scoping results on selected surfaces, the max equivalent stress on the surfaces can be used as an output parameter – Return to the Project page and choose “New Design. Xplorer Parameter Manager” ANSYS Workbench – Simulation • To utilize Design. Xplorer: August 26, 2005 Inventory #002265 9 -42

CAD & Parameters … Using Design. Xplorer Training Manual When DX opens, the current

CAD & Parameters … Using Design. Xplorer Training Manual When DX opens, the current input parameters will be displayed • To build “what if” studies enter new input values and choose “Insert a new “What-If” design point” ANSYS Workbench – Simulation • August 26, 2005 Inventory #002265 9 -43

CAD & Parameters … Using Design. Xplorer Each new scenario becomes a design point

CAD & Parameters … Using Design. Xplorer Each new scenario becomes a design point • When all design points are entered choose to “Run > Process Design Points” ANSYS Workbench – Simulation • Training Manual August 26, 2005 Inventory #002265 9 -44

CAD & Parameters … Using Design. Xplorer Training Manual When all solutions are complete

CAD & Parameters … Using Design. Xplorer Training Manual When all solutions are complete they can be viewed as a table • To view individual design points use the shift and control keys to highlight the scenarios of interest ANSYS Workbench – Simulation • August 26, 2005 Inventory #002265 9 -45

CAD & Parameters … Using Design. Xplorer What-If Charts allow users to configure and

CAD & Parameters … Using Design. Xplorer What-If Charts allow users to configure and plot input vs output in XY plots ANSYS Workbench – Simulation • Training Manual August 26, 2005 Inventory #002265 9 -46

CAD & Parameters E. Workshop 9 – Design. Xplorer Parameter Mgr. Training Manual •

CAD & Parameters E. Workshop 9 – Design. Xplorer Parameter Mgr. Training Manual • Goal: – Use the Design. Xplorer Parameter Manager to specify changes to the load magnitude and material properties of the model shown below and solve all scenarios at one time. ANSYS Workbench – Simulation • Workshop 9 – Design. Xplorer Parameter Manager August 26, 2005 Inventory #002265 9 -47

August 26, 2005 Inventory #002265 9 -48

August 26, 2005 Inventory #002265 9 -48