mech-intro 13.0 l02 basics

5/26/2018 Mech-Intro 13.0 L02 Basics

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L2-1ANSYS, Inc. Proprietary

2010 ANSYS, Inc. All rights reserved.Release 13.0

November 2010

Introduction to ANSYSMechanical

Customer Training Material

Lecture 2

Mechanical Basics


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Introduction to ANSYS Mechanical



November 2010

Customer Training MaterialChapter Overview

In this chapter, the basics of using Mechanicalto perform analyses

will be covered, which include:

A. The Mechanical Interface

B. Introduction to the Mechanical Application Wizard

C. Basic Analysis Procedure

D. Applying Loads and Supports

E. Graphics Control and SelectionF. The Engineering Data application

G. Workshop 2-1

The capabilities described in this section are generally applicable to

the ANSYS DesignSpace Entra licenses and above, unless noted.


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November 2010

Customer Training MaterialLaunching Mechanical

Recall that there are two ways of running Mechanical:

Configured from within ANSYS Workbench

or from a supported CAD system


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November 2010

Customer Training MaterialA. The Mechanical Interface

The components of the user interface are shown below:

Tree Outline

Details View

Graphics Window

Toolbars

Menus

Mechanical

Application Wizard

Status Bar

Message Window


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November 2010


The menus provide much of the functionality present in Mechanical.

The more commonly used menu items are covered below:

The title bar lists analysis type, product and active ANSYS license.

View controls various graphics options, legend and toolbars.

Units to change units on-the-fly.

Tools > Options to customize settings and options.

Help > Mechanical Help to access documentation.

. . . Menus

Analysis Type Product License


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November 2010


There are a number of toolbars to provide users quick access to

functionality also found in the menus.

The toolbars can be repositioned anywhere on the top of the Mechanical

window.

The Context toolbar, as will be illustrated later, updates depending on

what branch is active in the Outline tree. Tooltips appear if the cursor is placed over the toolbar button.

Toolbars


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November 2010


The Standard toolbar is shown below:

The Graphics toolbar is used for selection and graphicsmanipulation:

The left mouse button can be either in selection mode or graphicsmanipulation mode. The above toolbar buttons are grouped as selectentities and graphics manipulation control.

The graphics selection can be done using individual selection or box-selection. This is controlled by the Select Mode icon.

Toolbars

Bring up Mechanical Wizard

Solve Model

Capture Snapshot

Slice Planes

Annotations Comments

Graphics ManipulationSelection ToolsSelect mode Viewports


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November 2010

Customer Training Material Outline Tree

The Outline Tree provides an easy way of

organizing the model, materials, mesh,

loads, and results for the analysis:

The Model branch contains the input

data required for the analysis.

The environment branch (in this case Static

Structural) contains the loads and supports

relevant to the analysis discipline. The Solution branch contains result

objects and solution information.

Other branches (not covered here)

are also available.


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November 2010

Customer Training Material Outline Tree

The Outline Tree shows icons for each branch, along with a status

symbol. Examples of the status symbols are below:

Checkmark indicates branch is fully defined/OK

Question mark indicates item has incomplete data (need input)

Lightning bolt indicates solving is required

Exclamation mark means problem exists

X means that item is suppressed (will not be solved)

Transparent checkmark means body or part is hidden

Green lightning bolt indicates item is currently being evaluated

Minus sign means that mapped face meshing failed

Check mark with a slash indicates a meshed part/body

Red lightning bolt indicates a failed solution

Becoming familiar with the basic status symbols allows users to debug

Mechanical problems quickly.


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November 2010

Customer Training Material Details View

The Details View contains data input and output fields. The contents

wi l l change depending on b ranch selected.

White field: input data

Data in white text field is editable

Gray (or Red) field: information

Data in gray fields cannot be modified.

Yellow field: incomplete input data

Data in yellow fields indicates missing information.


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November 2010

Customer Training Material Graphics Window

The Graphics Window shows the geometry and results. Tabs allow

access to Print and Report Previews as well.


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November 2010

Customer Training Material Worksheet View

Worksheet views are available for many objects in the tree (i.e.

geometry, connections, etc.).

Provides a list view of the data in the tree.

Activate

Worksheet

Toggle between

graphics and

worksheet


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November 2010

Customer Training Material. . . Mechanical Application Wizard

By selecting an item on the Required Steps checklist, a callout appears,

illustrating how that function is performed.

In the example below, Verify Materials was selected, and the callout shows the

user where this item can be changed.


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November 2010

Customer Training Material Mechanical Application Wizard

The Mechanical Wizard is handy for

users who do not use Mechanical

every day.

Besides basic functionality, callouts

for more advanced items are also

available as shown on right.


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November 2010

Customer Training MaterialC. Basic Analysis Procedure

The purpose of analysis is usually to determine the responseof a

system based on some type of exci tat ion or loading.

It is crucial to remember that a mathematical modelis used:

CAD geometryis an idealization of the phys ical model

The meshis a mathematical representation of the CAD model

The accuracy of answers is determined by various factors:

How well the physical model is represented depends on the assumpt ions

Numerical accuracy is determined by the mesh density

CAD Model Finite Element Mesh


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November 2010

Customer Training Material Basic Analysis Procedure

Every analysis involves four main steps:

Preliminary Decisions

What type of analysis: Static, modal, etc.?

What to model: Part or Assembly?

Which elements: Surface or Solid Bodies?

Preprocessing

Attach the model geometry

Define and assign material properties to parts

Mesh the geometry

Apply loads and supports

Request results

Solve the Model

Postprocessing

Review results

Check the validity of the solution

Preprocessing

Solution

Postprocessing

Preliminary

Decisions


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November 2010

Customer Training MaterialD. Applying Loads & Supports

Loads and supports are applied on geometric entities in two different ways:

Pre-select geometry entity in Graphics Window, then select load or support from

Context Toolbar

Or, select load or support from Context Toolbar then select geometry entities inGraphics Window, then click on Apply in Details View.


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November 2010

Customer Training Material Applying Loads & Supports

After assigning the load the user can enter additional data in the Details view,if necessary.

Notice that in the Outline Tree the associated loads branch symbol status will alsochange to completed (checkmark).


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November 2010


For some structural loads direction is

needed:

If Components is chosen, enter X, Y, or Z

Components of loading

If Vector is chosen, select geometry and

enter magnitude of loading

Defaults can be set in Tools > Options

> Mechanical: Miscellaneous

> Load Orientation Type

The Global Coordinate System or user

defined local coordinate systems can be

referenced

User-Defined Coordinate Systems will be

discussed later


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November 2010


Existing geometry can be referenced to

control direction:

In the Details view, select Define By:

Vector

Three types of existing geometry can be used

Normal to planar face or along axis of cylindrical

face

Along straight edge or normal to cylindrical edge

Two vertices defining vector

Click on Direction and select geometry used

for vector orientation. Use the arrows in the

Graphics window to toggle the direction.

Click on Apply when finished.

Enter magnitude for loading in Magnitude.

Toggle arrow buttons to

reverse load direction

I t d ti t ANSYS M h i l


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November 2010

Customer Training MaterialE. Graphics Control and Selection

The lef t mou se but tonis used to select geometric entities OR to

manipulate the graphics display

User can select items (vertex, edge, surface, body) or manipulate the view

(rotate, pan, zoom in/out, box zoom)

Select mode can be single-select or box-select

In single-select mode, click-drag with left mousebutton to paint select multiple items

Use Ctrl-Left mouse button in single-select mode to select or unselect multiple

entities

In box-select mode, click-drag from left to right selects entities fully enclosed in

bounding box

In box-select mode, click-drag from right to left selects any entity partially enclosed inbounding box



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November 2010

Customer Training Material Graphics Control and Selection

In select mode the middle mouse provides several short cuts for graphicsmanipulation

Click + drag middle mouse button = dynamic rotate CTRL+ Middle mouse button = dynamic pan

Shift + Middle mouse button = dynamic zoom

If present, the wheel can be used to zoom in/out

RMB + drag = box zoom

Click right mouse button once and select Fit to fit model in view or accesscontext menu options



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November 2010

Customer Training Material Graphics Control and Selection

Selection planes allow for users to easily select surfaces which are hiddenfrom view by other surfaces.

User selects a plane; if more planes lie directly underneath the cursor, selectionplanes appear. Selection planes are color-coded with the same color as its parentpart and are ordered by depth from the cursor.



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November 2010

Customer Training MaterialF. The Engineering Data Application

The Engineering Data application provides overall control for material

properties.

Engineering data is a part of every project.

Engineering data can be opened stand alone (as a precursor to starting

a project for example).

To edit the EngineeringData in an existing

project RMB > Edit or

double click

To open the Engineering Datastandalone, add from the

component systems in the toolbox

(drag/drop or double click), then

RMB > Edit or double click.



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November 2010

Customer Training Material. . . The Engineering Data Application

The Engineering Data application is displayed below. Individual

controls and components are described next.

Toolbox

Property

Chart

Property Table

Material Properties

Individual Materials

Data Sources



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November 2010


The 2 icons in the toolbar control the basic

display of engineering data.

The first toggles a filter for the materialsshown in the toolbox:

ON = only materials relevant to the current

analysis types are displayed.

OFF = all material properties are displayed.

The second toggles the display of either the

project materials or the data source materials: ON: data sources (libraries) are displayed.

OFF: materials for the current project are

displayed.

Physics Filter for Toolbox Data Source/Project

Display



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November 2010


With data sources displayed the windows provide a cascading data presentation.

To view or modify materials one generally follows a work flow shown here:

Data Source > Material > Property

Choose Data Source(Library)

Choose Material

Choose Property

Display Property

in tabular and

graphical format



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November 2010


The list of available material

libraries is displayed here.

These may be ANSYS

supplied or user defined.

The Favorites field represents the

materials which will be available in every

project.

New user material libraries may be added

by entering a name and a location.

Check box allows library to be

unlocked for editing. Libraries must

be unlocked before materials can be

modified.

Browse for existing

libraries or choose new

library location.

Data Sources



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November 2010


To add a material from an existing library to the current project click the

plus sign (+) next to that material.

Highlight the desired library

Click the + next to the

desired material

Materials can be made available for all projects

by designating them as Favorites using RMB

IMPORTANT!: A material that is not displayed in the current

engineering data will not be available in the current analysis.

= OFF



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November 2010


To create a new material toggle

to the project materials display.

Enter a name, and description ifdesired, for the new material.

From the Toolbox

double click or dragand drop the desired

properties.

Finally enter values for

the properties.

Note: properties can be

added to existing

materials using the

same technique.

= OFF



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November 2010


Units menu in Engineering Data:

You may choose to display Values as Defined

or Values in Project Units.

As Defined units are controlled individually.

Project Units are taken

from the current Units menu

selection.



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Workshop 2.1Mechanical Basics

Goal:

Using the Stress Wizard, set up and solve a structural model forstress, deflection and safety factor.

G. Workshop 2-1Mechanical Basics
http://localhost/var/www/apps/conversion/tmp/Workshops/WB-Mech_120_WS_02.1.ppthttp://localhost/var/www/apps/conversion/tmp/Workshops/WB-Mech_120_WS_02.1.ppthttp://localhost/var/www/apps/conversion/tmp/Workshops/WB-Mech_120_WS_02.1.ppthttp://localhost/var/www/apps/conversion/tmp/Workshops/WB-Mech_120_WS_02.1.ppthttp://localhost/var/www/apps/conversion/tmp/Workshops/WB-Mech_120_WS_02.1.ppthttp://localhost/var/www/apps/conversion/tmp/Workshops/WB-Mech_120_WS_02.1.ppthttp://localhost/var/www/apps/conversion/tmp/Workshops/WB-Mech_120_WS_02.1.ppt

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