FEAP User Forum

FEAP => nurbFEAP => Topic started by: Brisk on July 05, 2017, 05:51:25 AM

Title: Problems about igafeap
Post by: Brisk on July 05, 2017, 05:51:25 AM

Dear FEAP users,

When I tested nurbs input files in ifeap of FEAP 8.5,  it tells that

Quote

*ERROR* PNUMS: Problem size does not permit a solution:
         Number of nodes         =         0
         Number of elements      =         0
         Number of material sets =         1

However, the same input files run correctly in nurbfeap of FEAP 8.4. So, are there something changes in igafeap 8.5? Or I used the wrong program?

Title: Re: Problems about igafeap
Post by: Prof. S. Govindjee on July 05, 2017, 08:23:36 AM

There are some test files in the folder igafeap/inputs.  Do they work for you?

Title: Re: Problems about igafeap
Post by: Prof. R.L. Taylor on July 05, 2017, 02:25:09 PM

I ran your files on my version of 8.5 and it runs perfectly?  Did you verify that when you run the first file, Iholep, with a solution added it works?  Even to plot the mesh???

Title: Re: Problems about igafeap
Post by: Brisk on July 06, 2017, 12:14:17 AM

Dear Prof. Taylor and Prof. Govindjee,

Thanks for your advice.

I checked the Installation Manual and found that

Quote

$FEAPHOME8 5/igafeap/main contain special instructions for resolving the loader issue...

Following the instruction, I changed the makefile in $FEAPHOME8 5/igafeap/main and replaced $(ARIFEAP) \ on the loader lines by:

Quote

-L$(FEAPHOME8_5)/igafeap \
-Wl,-whole-archive -lifeap8_5 -Wl,-no-whole-archive \

and the problem solved finally.

Title: Re: Problems about igafeap
Post by: fethio on May 23, 2018, 01:02:51 PM

Thanks for the solution, this solution worked for me as well.

Title: Re: Problems about igafeap
Post by: resammc on July 16, 2020, 01:08:48 AM

Two matters which are somehow related to this topic:

• For FEAP86 on Ubuntu, I could only make igafeap running by using the following line in the makefile:
  
  Quote

  -L$(FEAPHOME8_6)/iga \
          -Wl,-whole-archive -l:libifeap8_6i.a -Wl,-no-whole-archive \
  

  which is slightly different than the previous version. This might help someone.

---

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• When I run the 'Ijointr' example in igafeap85 inputs, I get different behaviors in FEAP85 and FEAP86 for the same input file. I did not look deep into it, but, clearly, one of the codes is not showing the expected results.
  (the attached figures)

Title: Re: Problems about igafeap
Post by: Prof. R.L. Taylor on July 16, 2020, 02:10:18 PM

There are bugs in the membrane -- if you change the Ijointi file to specify "finite' for the two membrane materials the problem runs.  We will work on the other element.