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Hi everyone,



     I encountered a problem while runing a UMAT in Abaqus 6.9, which
kept aborting with a systme error code 693. The UMAT is wriiten in
Abaqus 6.5 and prove runing well in 6.5. But when putting it in 6.9, it
always failed. I can not figure out what going on there. Do you have
good ideas?



     The error message is like

 

    The system erro code 693

Dear All,

I will appreciate if you answer my question.

I modeled a 2D pin joint in ABAQUS using USDFLD to apply failure criteria.

I used CPS4 element for (0/90)s. As you know, the elements of both two layers completely overlap.

Abaqus gives a cotour of all layers together (bothe 0 and 90 deg.). How I can only, for example, see the contour of 90 deg. ply or only 0 deg. ply? 

In the output plots, how can i see stress or any field variable output for each layer? 

Regards,

Mehdi 

Hello Everybody here :

 I am going to use ANSYS to do some finite element simulations of interface crack between

substrate and film and the residual stress of substrate and film. I don’t how to define the interface of the substrate and film in finite element model. How to connect the substrate and film? Just glue the substrate and film or use other element to deal with it? Thanks a lot.

Please recommend a good undergraduate textbook for 'mechanical vibrations'...

Thanks in advance.

14th april 2011 <UPDATE>

what a hypocritical website this is.... almost 200 reads and not one comment. high academic qualifications of most members seems to be creating an elastic sheath of EGO!

Thanks for reading this too. :)

Dear All,

 I have seen it being mentioned that the material at an updated configuration in an Updated Lagrangian Formulation (say in FEM) may not remain isotropic, even if the reference configuration was isotropic.  However, I have not seen any detailed discussion on the matter.

Hence, I would request your comments on:

hi

i am interesting to be known with new approch in simulation of process or nano technology .

please help me.

thanks