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Modelling SMA embeded in composite beam

Submitted by erismy1 on

How to model SMA wire embeded in composite beam using Abaqus using 3D solid extrusion?

The model is cantilever beam of composite in which the SMA wire is embeded in neutral axis of the beam.

I only simulate deflection.

The simulation without SMA has been succesfully done which show deflection when applied load at the tip( free end)

 

 

Question about how to determine support radius..

Submitted by bahamute on
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Hi, everyone.

I'm going to employ the meshfree method to analyze composite model.

But, I can't understand how to determine the support radius although I have read some references.

I will use the circular support domain.

Please explain how to determine the support radius.

Tention Coupon testing

Submitted by oena123 on
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Hi ,

I am trying to develop material model for cyclic loading by doing a cyclic loading test on a tention coupon.

It is a strain control test.The strain cycles of 10 cycles are applied at (2%,5%,6%,8%) rate.

The problem is that I want to apply this strain rate to the middle gauge length of tention coupon.

But in abaqus I can apply this load as a displacement load only at one end of tention coupon.

IS there any option is abaqus where I can change the displacement load at one end according to the strain variation in the gauge length

Subroutine simulation migration from HETVAL to UMATH

Submitted by PauloCalvo on

Hi!



I'm already simulating a shape memory alloy behavior with the aid of the HETVAL subroutine, but I'd like to use UMATHT instead, since the HETVAL can't simulate correctly heat absortion(cooling down).



I've tried to add the required values for UMATHT without achieving a correct phase fraction simulation, and some times even no compilation of the .for file.



Is there any other examples that uses UMATHT besides the Stefan problem?

Any other recommendation about HETVAL to UMATHT migration?



Thanks in advance!

Abaqus multiscale bridge with UMAT

Submitted by marcoesteves on
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Hello,

I'm trying create a bridge between scales using Abaqus, UMAT subroutine.

On macro scale I call UMAT, which calls other abaqus inp. with this example code

call SYSTEM('abaqus cae script=C:\Temp\mixUMAT\simpleModel.py -- A 2 5.3')

And my "simpleModel" receives all arguments properly.

However, I need some values which are calculcated on "simpleModel", to UMAT continues the executation.

Anyone knows  how can I do it?

 

Thank you! 

Stress Relaxation

Submitted by Amit Pandey on

2012-07-10

I would like to seek comments on : Room temperature stress relaxation and governing mechanisms that contribute to the plasticity that occurs during this process. As, most of the available work on relaxation is done at elevated temperatures.



Please check more on this thread by hari@



node/12687



 I have also attach papers by Prof Hart and Prof Krempl that did throw some light on this particular subject.

Buildings subsidence due to clay ‘shrink-swell': UK research highlights link to weather and consequences for insurers

Submitted by Laure Ballu on

Will home owners get that sinking feeling this summer?



Are we in for a summer of cracked buildings? It all depends on the weather. Research from the British Geological Survey (BGS) has highlighted the importance of rainfall and temperature on the incidence of clay shrink-swell, a precursor to subsidence, in the UK. For many, the cool, wet conditions we have experienced so far this summer may be just what is needed to keep their house in order.

Modelling continuum based constitutive for adhesive layers with finite thickness

Submitted by mahzanjohar on
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I am new in ABAQUS. 

Can anyone help me on modelling continuum based constitutive for adhesive layers with finite thickness in ABAQUS?

 

 Is there is any tutorial in abaqus documentation about modelling the thick adhesive layer? I'm try to model thick adhesive layer in a single lap joint.

attached is the link of my model. can anyone teach me how to correct this model...