JFOLD: Simulation based airbag folding

Transcription

Oasys LS-DYNA UK Users' Meeting 2014
JFOLD
Introducing A New Simulation-Based
Airbag Folding System for LS-DYNA
Oasys Update Meeting January 2014
Airbag folding methods
• Pre-processor method can fold simple patterns very
quickly but can’t create the complex folded shapes often
used in modern airbag designs.
• Simulation-based approach requires preparation and
calculation time but can be applied to almost any kind of
folding pattern thanks to the physical, realistic nature of
the folding process.
Copyright © 2014 JSOL Corporation All Rights Reserved
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Simulation-based airbag folding
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JFOLD development concept
JFOLD: Simulation-based airbag folding system
for LS-DYNA
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Intuitive and interactive operation
Management of folding steps using flow-chart graphics
Reusability of tools
Pre-post processor that runs inside Oasys Primer
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JFOLD has been developed by JSOL Corporation.
JFOLD license is needed.
JFOLD cost doesn’t include LS-DYNA solver.
Also uses Oasys D3Plot
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Operation panels of JFOLD system
Model graphics panel
JFOLD operation panel
(Process Management Panel)
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Process Management Panel (PMP)
Folding pattern A
“Root”
“Parent step” “Child step”
Folding pattern B
Folding pattern C
LS-DYNA
analysis
LS-DYNA
analysis
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Process Management Panel
Tool Management Panel
Tool Setting Panel
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Add from library
Event viewer
Tools
Tool Setting Panel
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Contact
Positioning
Tied nodes
Loading
Tool Setting Panel
Motion
control
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Tool mesh
Tool mesh
Local coordinate system
Action mark
“M” means “Move”.
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Action types of tool mesh
finalGeom
Move
Stationary
Initial
Rigid
Final
Rigid
*BOUNDARY_PRESCRIBED_MOTION_RIGID
Roll
*BOUNDARY_PRESCRIBED_FINAL_GEOMETRY
Dependent
Fold
Rotator
Rigid
X
Rigid
Rigid (master)
Deformable
Rigid
Z
Z
*LOAD_RIGID_BODY
*CONSTRAINED_RIGID_BODIES
Press
Load
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Rigid (slave)
Pressure
Fabric tool and Components
Fabric tool
Pressure
Components
Stitching
Inflator, module case, etc
*AIRBAG_LOAD_CURVE
*MAT_CABLE_DISCRETE_BEAM
*BOUNDARY_PRESCRIBED_FINAL_GEOMETRY
Fix
Rigidify
*BOUNDARY_SPC
*CONSTRAINED_NODAL_RIGID_BODY
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Inserting an inflator part
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Driver airbag folding
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Passenger airbag folding
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Stitching tool to make 3D shaped airbag
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Release plan
• JFOLD v1.0 has been released in Japan since June 2013.
• Folding example models will be included in the JFOLD
install package.
• Worldwide release is planned for February 2014.
JFOLD v1.2
– OS: Windows, Red Hat Linux
– License: floating, node locked
– Only rental license is avaiable.
• JFOLD v2.0 planned worldwide release: July 2014.
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JFOLD: Simulation based airbag folding

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