geometry meshing with hypermesh mesh preparations and ... · altair proprietary and confidential...

Copyright © 2008 Altair Engineering, Inc. All rights reserved. Altair Proprietary and Confidential Information

Agenda

• Geometry meshing with HyperMesh

• Mesh preparations and modifications with HyperCrash

• Material creation and assignment

• Property creation and assignment

• Welding

• Mirror to full model

• Global contact definition

• Load case creation

• Model check

• Start of simulation


Load case creation

• Artificial rest of car (RigidBody)

Switch to „XY View“

Switch perspective off with the „p“ key


„Mesh Editing“ „Rigid Body“ „Create“

Load case creation



Name RigidBody and „Ok“

Select „Add nodes by box

selection“ and draw a box over the

last row of crashbox nodes

Last row of

nodes

Load case creation



End with „Save“ and „Close“

Adjust „Properties“ of rigid body:

Load case creation



„Display Graphic Objects“ „On/Off Rigid Bodies“

Load case creation



„LoadCase“ „Boundary Conditions „Create“

Load case creation



Name this boundary condition and „Ok“

„Add/Remove nodes by picking“ select the Master Node

of the RigidBody

Close by clicking all

boundary conditions

except Translation in x (Tx)

End with “Save”

Load case creation

• Artificial rest of car (RigidBody) – Boundary Condition definition


„Display Graphic Objects“

„On/Off Boundary Conditions“

Load case creation

• Gravity Load


„LoadCase“ „Gravity Load“ „Create“

Load case creation

• Gravity Load


„LoadCase“ „Gravity Load“ „Create“

Give name and „Ok“

Insert value : t = 0 9.81e-3

t = 100 9.81e-3 „Save“

Load case creation

• Gravity Load


Chose „Add all nodes“

„Tz“ for direction of gravity

Load case creation

• Gravity Load


Chose „Properties“

„-1“ for negative Z-direction

„Save“ and „Close“

Load case creation

• Gravity Load


„Display Graphic Objects“ „On/Off Gravity“

Load case creation

• Gravity Load


„LoadCase“ „Initian Velocities“ „Create“

Load case creation

• Initial velocity definition


Name and „Ok“

Select with „Add all nodes“, all nodes

„-5“ (m/s) in X-Axis


Load case creation



Namen eingeben und „Ok“

Mit „Add all nodes“ alle Knoten auswählen

„-5“ (m/s) in X-Richtung

„Display Graphic Objects“

„On/Off Initial velocities“

Load case creation



„LoadCase“ „Rigid Wall“ „Create“

Load case creation

• Rigid Wall definition


„Select Rigid wall type“ „Cylinder“

„Geometry …“ position and direction

„Distance to search slave nodes“ 200

„Friction Parameters“ set to 0.2

„See“

„Save“

„Close“

Load case creation

• Rigid Wall definition


„Data History“

„Accelerometers“ „Create“

Load case creation

• Definition of Accelerometer for post processing


Name and „Ok“

Select with „Pick nodes to

add“ one node to be defined

as accelerometer

„Cuf off frequency“

of 1.650 (=1650 Hz):

CFC1000 Filter


Load case creation

• Definition of Accelerometer for post processing


„Data History“ „Section“

„Create“

Load case creation

• Definition of Section Forces for post processing


Name and „Ok“

Select both crashbox parts

with „Include picked Parts“

Conclude with „Yes“

Load case creation



Define section plane with „3

nodes“

Adjust with shells and nodes

correct the section plane

1

2

3

Load case creation



Before After

Save

Close

Load case creation


geometry meshing with hypermesh mesh preparations and ... · altair proprietary and confidential...

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