Lecture 2-Hypermesh

8/10/2019 Lecture 2-Hypermesh

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JTME 443/643: H erMesh

ME 443/643

Design Techniques in

Mechanical Engineering

Instructor:Dr. Jagadeep Thota

Lecture 2:Introduction to HyperMesh


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Altair HyperWorks Software

Altair has free student version edition of

HyperWorks software.The link to buy the free version is listed below:

http://www.altairuniversity.com/front-

page/hyperworks-11-0-student-edition/

Major limitations of free version:

Can only create models up to 10,000 nodes (maybe

okay for the class, but there is a chance your project

model may shoot above the 10,000 nodes limit)

Only CAD models from SolidWorks OR in an IGES

format can be imported into HyperMesh.
http://www.altairuniversity.com/front-page/hyperworks-11-0-student-edition/http://www.altairuniversity.com/front-page/hyperworks-11-0-student-edition/http://www.altairuniversity.com/front-page/hyperworks-11-0-student-edition/http://www.altairuniversity.com/front-page/hyperworks-11-0-student-edition/http://www.altairuniversity.com/front-page/hyperworks-11-0-student-edition/http://www.altairuniversity.com/front-page/hyperworks-11-0-student-edition/http://www.altairuniversity.com/front-page/hyperworks-11-0-student-edition/http://www.altairuniversity.com/front-page/hyperworks-11-0-student-edition/http://www.altairuniversity.com/front-page/hyperworks-11-0-student-edition/http://www.altairuniversity.com/front-page/hyperworks-11-0-student-edition/http://www.altairuniversity.com/front-page/hyperworks-11-0-student-edition/http://www.altairuniversity.com/front-page/hyperworks-11-0-student-edition/http://www.altairuniversity.com/front-page/hyperworks-11-0-student-edition/http://www.altairuniversity.com/front-page/hyperworks-11-0-student-edition/http://www.altairuniversity.com/front-page/hyperworks-11-0-student-edition/


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Computational FEA Stages

Computational FEA can be broken down into

three stages: Pre-processing

Involves creating the FE model and applying the necessary

loads and boundary conditions

HyperMesh

Processing (Solver)

Solving the FE problem by running the FE model created in

the previous step

Radioss(Bulk data)

Post-Processing

Animating or plotting the required results obtained from

processing the FE model

HyperView


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Starting HyperMesh Software

Click on the Windowsstart button

Click on Program Files

Click onAltairHyperWorks 11.0 (62-bit)folder

Click on HyperMeshicon

(1)

(2)

Click/Select at this location

(#) Sequence of steps


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HyperMesh Graphics User Interface (GUI)


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Description of HyperMesh GUI


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HyperMesh ViewToolbar



HyperMesh 3D View Con trolToolbar



Three Steps of Discretization

First step in any FE software is to create nodes

The most common method is by typing the x, y & z coordinates

of the node

Second step is to create linesbetween any two nodes

The last step, which is meshing, is to either:

Divide the lines into smaller lines (elements) for 1D elements

For 2D models, divide the area enclosed by the lines into smaller

areas (elements)

Create

Nodes

Create

Lines

Create

Mesh

NodesLines

2D

Elements

1D

Elements



Geometry Creation in HyperMesh

Let us create a square of 2 units length

(1)

(2)



Creation of Nodes

(1)

(2) Coordinates of

the first node

(3)

(4)Coordinates of

the second node

(5)Click on create

(6)Coordinates of

the third node

(7)Click on create

(8)Coordinates of

the fourth node

(9)Click on create

(10)

(11)



Creation of Lines



Creation of Lines

(1)

(2) Select atleast two nodes

to create a line between them

(3)

(4)

(5)Repeat steps

(2), (3) & (4) to

draw linesbetween other

nodes

(6)



Collectors

In order to define any single component in HyperMesh,

four collectors need to be created

Component Collector: the geometry and mesh of the component

is stored here

Material Collector: the material of the component needs to be

created here

Property Collector: this defines if the elements (mesh) used forthe component is 1D (beam), 2D (shell) or 3D (solid)

Load Collector: Any loads or boundary conditions (supports)

created for the component will be assigned to this collector

The component collector links the material and property

collector

The load collector does not need to be linked to the

component collector



Collectors

Property Collector

Load CollectorMaterial Collector

Component Collector

An automatic component collector was created by HyperMesh as soon

as the first linewas created

This only happens when there are no collectors under the Component

tree

If there is one (or more) component collector already created, then any

geometry or mesh created will automatically be assigned to the last

active component collector

Hence, make sure before creation of any geometry or mesh that you are

assigning the right collector to it



Deleting

(1)

(2)



Deleting

D l i



Deleting

D l ti



Deleting

Select these 3 lines

by clicking on them

(1)

(2)

(3)

C ti f Ci l



Creation of Circle

(1)(2)

C ti f Ci l



Creation of Circle

Select this node by

clicking on it

This will be center

node of the circle

(1)

(2)

(3)

C ti f Ci l



Creation of Circle

This defines the axis

normal to circle face

C ti f Ci l



Creation of Circle

(1)

(2)

C ti C t C ll t



Creating Component Collector

The circle and line are in the same component collector auto2

We are going to create a new component collector quarter circle

After step (5), there will

be component collector

named quarter circlecreated in the tab area

under the Component

tree

(1)

(2)

(3)(4)

(5)

(6)

C ti Q t Ci l



Creating Quarter Circle

(1)

(2)

(3)

(4)

These two are defined

similar to the circle

Center of the arc

(quarter circle is the

present case)

C ti N d Li



Creating Nodes on Line

We will be converting the quarter circle into

For this we need to create a node at either end of the quarter circle

(1)(2)





(1) (2)





Select this line(1)

(2)

Change Component Collector


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We will create the lines in auto2collector

For this we have to make auto2the current active component collector

The current active collector will be shown in bold in the tab area under the collector treeand also its name will be displayed at the bottom right box of the HyperMesh screen

Active collector will

be shown in bold

Active component collector

will be displayed here

Active load

collector willbe displayed

here

(1)

(2)

(3)

Create Lines


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Create Lines

Select these

two nodes

(1)

(2)

(3)

(4)Repeat steps (2)

& (3) to create the

other line and closethe geometry

Changing Component Collector


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Changing Component Collector

We will change the

component collector of

these two lines to the

component collector of

the quarter circle

(1)

(2)



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(1)

(2)



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Select these

two lines(1)

(2)



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(2)

(1)



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(2)

(1)

Concluding Remarks


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Concluding Remarks

Work on the HyperMesh tutorials posted on the

course website during off-class hoursRedo what was taught/shown in this

presentation

Next Class

Theory

Direct Stiffness Method (a finite element method)

Documents

Lecture 2-Hypermesh