mechanical nonlin 13.0 ws 05b localized yielding
TRANSCRIPT
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8/12/2019 Mechanical Nonlin 13.0 WS 05B Localized Yielding
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Customer Training Material
Localized Yielding
Structural Nonlinearities
WS5B-1ANSYS, Inc. Proprietary
2010 ANSYS, Inc. All rights reserved.Release 13.0
December 2010
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ANSYS Mechanical Structural Nonlinearities
Customer Training MaterialWorkshop 5B: Localized Yielding
Goal
Introduce Metal Plasticity to the Workshop 4A
problem and compare its effect on results (contact
Model Description
Tip
Insulator
x symmetr c mo e o n ect on mo ng mac ne
nozzle tip assembly
Materials:
Copper alloy for Tip (280Mpa Yield Strength)
Titanium for Insulator
Housing
WS5B-2ANSYS, Inc. Proprietary
2010 ANSYS, Inc. All rights reserved.Release 13.0
December 2010
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ANSYS Mechanical Structural Nonlinearities
Customer Training MaterialWorkshop 5B: Localized Yielding
Model Description (contd)
Contact Pairs:
A. Frictionless contact at
Housing to Nozzle tip face
seal
B. Bonded contact at Nozzle tip
o nsu a or
C. Bonded contact at threaded
connection between Housing
not modeled)
WS5B-3ANSYS, Inc. Proprietary
2010 ANSYS, Inc. All rights reserved.Release 13.0
December 2010
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ANSYS Mechanical Structural Nonlinearities
Customer Training Material Workshop 5B: Localized Yielding
Model Description (contd)
Thermal Boundaries:
A. Hot manifold @ 220C
B. Cold manifold plate @50C
C. Nozzle tip band heater @ 80 Watts
WS5B-4ANSYS, Inc. Proprietary
2010 ANSYS, Inc. All rights reserved.Release 13.0
December 2010
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ANSYS Mechanical Structural Nonlinearities
Customer Training Material Workshop 5B: Localized Yielding
Model Description (contd)
Structural Boundaries
A. Frictionless Support @
Nozzle Housing Flange
B. Frictionless Support @
Insulator
Structural Loads
1st loadstep reconciles
melt
channel
wall
nter erence t etween
housing and tip face seal
2nd loadstep reads in
state thermal run
3rd loadstep applies pressure
to melt channel wall.
WS5B-5ANSYS, Inc. Proprietary
2010 ANSYS, Inc. All rights reserved.Release 13.0
December 2010
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ANSYS Mechanical Structural Nonlinearities
Customer Training Material Workshop 5B: Localized Yielding
Steps to Follow:
Restore Archive browse for file W5b-localized-yielding.wbpz
Save as
File name: W5b-localized-yielding
*
WS5B-6ANSYS, Inc. Proprietary
2010 ANSYS, Inc. All rights reserved.Release 13.0
December 2010
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ANSYS Mechanical Structural Nonlinearities
Customer Training Material Workshop 5B: Localized Yielding
The Project Schematic should look like the picture below.
WS5B-7ANSYS, Inc. Proprietary
2010 ANSYS, Inc. All rights reserved.Release 13.0
December 2010
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ANSYS Mechanical Structural Nonlinearities
Customer Training Material Workshop 5B: Localized Yielding
Highlight the Copper NL and Stainless Steel NL materials to confirm
that the plasticity models have been defined with Bilinear Isotropic
laws as show below.
WS5B-9ANSYS, Inc. Proprietary
2010 ANSYS, Inc. All rights reserved.Release 13.0
December 2010
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ANSYS Mechanical Structural Nonlinearities
Customer Training Material Workshop 5B: Localized Yielding
Return to the project schematic page
Double click (or RMB=>Edit) on the Thermal Model Cell to openMechanical Session
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ANSYS Mechanical Structural Nonlinearities
Customer Training Material Workshop 5B: Localized Yielding
Highlight the Housing and Nozzle Tip components
In the Details Window, turn Nonlinear Effects ON to include the plasticity effects
WS5B-11ANSYS, Inc. Proprietary
2010 ANSYS, Inc. All rights reserved.Release 13.0
December 2010
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ANSYS Mechanical Structural Nonlinearities
Customer Training Material Workshop 5B: Localized Yielding
Execute a SOLVE
The convergence now takes over 20 iterations, up from just 9 (WS4A) when all
materials were considered linear elastic.
WS5B-12ANSYS, Inc. Proprietary
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December 2010
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ANSYS Mechanical Structural Nonlinearities
Customer Training Material Workshop 5B: Localized Yielding
Post process the contact pressure
Notice the dramatic difference in pressure distribution at the seal face as well as
the peak value when compared with same results published in workshop 4A
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ANSYS Mechanical Structural Nonlinearities
Customer Training Material Workshop 5B: Localized Yielding
Post process the preload at the frictionless contact resulting from the
interference fit as before. Compare the preload with workshop 4A.
Note, the change in preload is not nearly as dramatic as that of the contact
.
WS5B-14ANSYS, Inc. Proprietary
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December 2010
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ANSYS Mechanical Structural Nonlinearities
Customer Training Material Workshop 5B: Localized Yielding
Highlight the Solution Branch
RMB>Insert>Strain>Equivalent Plastic Strain
Note: Yielding is concentrated locally at the melt channel wall. Material remains
e as c across mos o e sea ace. ence, pre oa oes no c ange very muc .
WS5B-15ANSYS, Inc. Proprietary
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December 2010
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ANSYS Mechanical Structural Nonlinearities
Customer Training Material Workshop 5B: Localized Yielding
Post process equivalent stress and compare to results published at end of
workshop 4A.
WS5B-16ANSYS, Inc. Proprietary
2010 ANSYS, Inc. All rights reserved.Release 13.0
December 2010