ANSYS- Modeling meshing Workbook JULY 2005

7/25/2019 ANSYS- Modeling meshing Workbook JULY 2005

1/26

ANSYSModeling and Meshing Workbook

B6- Eureka Court, Beside BATA, Behind Chermas, Ameerpet, Hyderabad, AP, IndiaPh.55615442, 55625442, 55635442, 56565442, 56645442, 55775442, 55325597, 23755770, 23755774.

ANSYSis a complex software to teach/ learn, as it involves lot of FEA/ Structural/ Thermal Engineering/ Mathematics subject to a higher levels and so, Engineerswith specialization in Structural, Thermal, CADCAMCAE, Engineering designs canunderstand easily the techniques and methods involved in modeling, meshing,loads, constraints, DOFs, Solution methods, getting results, reviewing results,validating results etc. Moreover the beauty of FEA lies in idealizing the real-time

model as an appropriate mathematical model. One can get a reasonable grip onthis subject, with specialized masters degrees.and ofcourse only if you do it fromIITs, NITs and a few Group-1 Colleges/ Universities.

But, we see many B.E Mechanical, Civil Engineers, excelling in the field of CAE.You could also do thisif you have lots of determination to excel in this field, andstudy FEA books and Engineering books as Theory of Plates & Shells, Theory ofElasticity, Theory of Dynamics of Structures, Solid Mechanics, Thermal Stressesand Engineering, Design Optimization techniques, Modeling of Mechanical andStructural Systems etc.

With this course, we are giving a sincere try that gives you a gentle push to reachyour goal of becoming a CAE Engineer. So with this push, we hope that you get

the required acceleration by self-study, thoughts and applications in due course oftime.

The course targets to make an Engineer, know the Basics of various analysesavailable in ANSYS, Modeling and Meshing techniques etc. This course makes youwork on around 18 modeling examples, 13 meshing examples, 45 Structuralproblems, 18Thermal problems, 1design optimization problem and some specialproblems dealt as exams.

The duration would be usually 3- 4 hours a day for 4 to 5 weeks as below.

STUDENTS ENGINEERING GRADUATES/ PGS

Modeling: 5 days,Meshing: 2 days,Structural Analysis: 10 days,Thermal Analysis: 5 days,Optimization/ Exams problems: 2 days

Modeling: 6 days,Meshing: 3 days,Structural Analysis: 12 days,Thermal Analysis: 6 days,Optimization/ Exams problems: 3 days

24 days 30 days

Extra Practice: 1 Week after course &2 Weeks after Graduation

Extra Practice: 2 Weeks after course &2 Weeks every year if TAV > 10k

B.E. Project Works available in December to March: Rs.5000/- Per batch of 2-5.Structural Problems: 3 (2 days), Thermal Problems: 2 (1 day): Project- 2 days, Documentation- 1 day

FEA and ANSYS

What is FEA?

About ANSYS

ANSYS Basics

Starting ANSYS

ANSYS Workbench Environment

The GUI

Graphics and Picking

The Database and Files

Saving Files

Exiting ANSYS

File Types


2/26



General Analysis Procedure

Overview

Preliminary Decisions

Preprocessing

Solution

Postprocessing

Introduction to ANSYS Modeling

Direct Generation vs. Solid Modeling

Direct Generation

o Creating nodes and elements

o Filling between nodes

o Setting Element Attributes

Solid Modeling

Bottom up

Using key points

Using lines, splines & arcs

Using areas and volumes (arbitrary)

Top Down

From Primitives

Creating rectangle, circle, polygon, block, cylinder, prism,

sphere, cone and torus.

Concepts of hard points, line fillets and area fillets.

Practice-1: Create Surface as shown below using techniques discussed above.


3/26



Practice-2 Create Surface as shown below using techniques discussed above.

Practice:3 Create Surface as shown below using techniques discussed above.


4/26



Theory

Modeling with Boolean operationsIntersectAddSubtractOverlapGlueDivide

Introduction to Coordinate SystemsTypes of coordinate Systems

Global & LocalActive coordinate system

Introduction to Working PlanesCreating a new working planeMoving and rotating the working plane

Modify / Transformation commandsCopyReflectMove/ ModifyScale

Practice: 4 Create Solid as shown below using techniques discussed above.


5/26



Practice:5CreateSolidasshownbesideus

ingtechniques

discussedabove.

Practice: 6 Create Solid from the 2 views given below.


6/26



TheoryModel Creation by Extrusion

Sweeping key points along a trajectory to create lines

Revolving key points about an axis to create arcs or full circles, normal to the axis

Sweeping lines or splines along a trajectory to get areas

Revolving lines, splines or arcs about an axis to create cylindrical areas.

Giving depth to an area to create a volume, normal to the area Creating a volume with tapered faces

Sweeping an area along a trajectory to create a volume

Revolving an area about an axis to create a cylindrical volume

Extending Lines

Modifying an existing line by extending that line to a desired length

Creating a new line on the basis of an existing line, where the existing line will not be

modified.

Practice: 7


7/26



Practice: 8

Practice: 9


8/26



Practice: 10

Practice: 11


9/26



Practice: 12 & 13


10/26



Practice: 14

Practice: 15


11/26



Practice: 16 & 17


12/26



Practice: 18

End of Modeling


13/26



Meshing a Model

Introduction to elements

One Dimensional Elements

Two Dimensional Elements

Two and Half Dimensional Elements

Three Dimensional Elements

Quadrilateral Elements

Triangular Elements

Brick Elements

Tetrahedral Elements

Shell Elements

Introduction to Meshing

Mapped and free meshing

How to control mesh size?

How to use Mesh Tool?

Concatenation and its significance

Clearing mesh and re-meshing

Some useful meshing techniques

Numbering Controls

Merging Coincident Points

Compressing Item Numbers

Setting Start Number & viewing Start Number Status

Adding Number Offset

What is coupling and how to create coupled sets of nodes?

Topics of Discussion for Meshing Surfaces / Solids

The figures in the following pages are used to explore some of the procedures, dos and dont

in meshing You may also make similar models, try to mesh them and apply the subject

taught in your theory class.


14/26




15/26




16/26




17/26




18/26




19/26



End of Meshing Theory/ Simple Practice

Now, with the above knowledge try to model and mesh the

components given in the following pages

(Assume dimensions appropriately if not available / clear)


20/26



EXERCICES

Meshing Exercise-1

Meshing Exercise-2


21/26



Meshing Exercise-3

Meshing Exercise-4


22/26



Meshing Exercise-5

Meshing Exercise-6


23/26



Meshing Exercise-7

Meshing Exercise-8


24/26



Meshing Exercise-9

Meshing Exercise-10


25/26



Meshing Exercise-11

Meshing Exercise-12


26/26


Meshing Exercise-13

END OF MODELING MESHING

OPEN ANALYSIS WORKBOOK TO CONTINE WITH ANALYSIS PROBLEMS

Documents

ANSYS- Modeling meshing Workbook JULY 2005