Mechanical Nonlin 13.0 WS 05B Localized Yielding

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

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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



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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)



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Customer Training Material Workshop 5B: Localized Yielding


Thermal Boundaries:

A. Hot manifold @ 220C

B. Cold manifold plate @50C

C. Nozzle tip band heater @ 80 Watts



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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.



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Steps to Follow:

Restore Archive browse for file W5b-localized-yielding.wbpz

Save as

File name: W5b-localized-yielding

*



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The Project Schematic should look like the picture below.



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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.



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Return to the project schematic page

Double click (or RMB=>Edit) on the Thermal Model Cell to openMechanical Session



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Highlight the Housing and Nozzle Tip components

In the Details Window, turn Nonlinear Effects ON to include the plasticity effects



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Execute a SOLVE

The convergence now takes over 20 iterations, up from just 9 (WS4A) when all

materials were considered linear elastic.



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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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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

.



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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 .



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Post process equivalent stress and compare to results published at end of

workshop 4A.



December 2010

Mechanical Nonlin 13.0 WS 05B Localized Yielding

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Transcript of Mechanical Nonlin 13.0 WS 05B Localized Yielding