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Re: zero Force everywhere!!
by yowasi
::
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Hi Ziyad,
Are you still getting the same warning message?
It is not a question of the units system but one of consistency. The SI system is king! Use whichever system you wish as long as you're consistent. If, for example, you are using Pa and m, you do have to check that you have not written mm somewhere when you really meant m. Similarly if you had used MPa and mm, you would have to check that you had not written m when you meant mm etc etc.
If all that is checked and fine, then you have to look elsewhere for a possible cause of the warning message you got.
Hope that is useful.
Regards,
Robert
--- In Abaqus@..., ziyad <ziyad02@...> wrote:
>
>
> Hi Robert,
> yes, I am using the SI units (N, Pa, Kg,....), for example pressure from 3.5
> MN acting on area of 1.37 m2 I defined as 2.53467E+006.
> Do u think I should use another unit system?
>
> Regards
> Ziyad
>
>
> yowasi wrote:
> >
> > You might want to recheck your units.
> >
> > Also, your entries for loads are expanded to, for example, "e+06" which I
> > assume would be newtons. This expansion makes your numbers very large. If
> > the calculation involves inverting at some point, you are bound to end up
> > with very tiny numbers, which could easily be declared to be zero during
> > computation!
> >
> > Regards,
> > Robert
> >
> > --- In Abaqus@..., ziyad <ziyad02@> wrote:
> >>
> >>
> >> Hi all,
> >> I had recieved following warrning when modeling load test on board pile.
> >> Has
> >> anyone an idea what does this mean. Attached inp.file.
> >>
> >> regards
> >> Ziyad
> >>
> >> warrning:"There is zero FORCE everywhere in the model based on the
> >> default
> >> criterion. please check the value of the average FORCE during the current
> >> iteration to verify that the FORCE is small enough to be treated as zero.
> >> if
> >> not, please use the solution controls to reset the criterion for zero
> >> FORCE." http://www.nabble.com/file/p24147811/Load-test.inp Load-test.inp
> >> --
> >> View this message in context:
> >> http://www.nabble.com/zero-Force-everywhere%21%21-tp24147811p24147811.html
> >> Sent from the Abaqus Users mailing list archive at Nabble.com.
> >>
> >
> >
> >
> >
>
> --
> View this message in context: http://www.nabble.com/zero-Force-everywhere%21%21-tp24147811p24259352.html
> Sent from the Abaqus Users mailing list archive at Nabble.com.
>
Are you still getting the same warning message?
It is not a question of the units system but one of consistency. The SI system is king! Use whichever system you wish as long as you're consistent. If, for example, you are using Pa and m, you do have to check that you have not written mm somewhere when you really meant m. Similarly if you had used MPa and mm, you would have to check that you had not written m when you meant mm etc etc.
If all that is checked and fine, then you have to look elsewhere for a possible cause of the warning message you got.
Hope that is useful.
Regards,
Robert
--- In Abaqus@..., ziyad <ziyad02@...> wrote:
>
>
> Hi Robert,
> yes, I am using the SI units (N, Pa, Kg,....), for example pressure from 3.5
> MN acting on area of 1.37 m2 I defined as 2.53467E+006.
> Do u think I should use another unit system?
>
> Regards
> Ziyad
>
>
> yowasi wrote:
> >
> > You might want to recheck your units.
> >
> > Also, your entries for loads are expanded to, for example, "e+06" which I
> > assume would be newtons. This expansion makes your numbers very large. If
> > the calculation involves inverting at some point, you are bound to end up
> > with very tiny numbers, which could easily be declared to be zero during
> > computation!
> >
> > Regards,
> > Robert
> >
> > --- In Abaqus@..., ziyad <ziyad02@> wrote:
> >>
> >>
> >> Hi all,
> >> I had recieved following warrning when modeling load test on board pile.
> >> Has
> >> anyone an idea what does this mean. Attached inp.file.
> >>
> >> regards
> >> Ziyad
> >>
> >> warrning:"There is zero FORCE everywhere in the model based on the
> >> default
> >> criterion. please check the value of the average FORCE during the current
> >> iteration to verify that the FORCE is small enough to be treated as zero.
> >> if
> >> not, please use the solution controls to reset the criterion for zero
> >> FORCE." http://www.nabble.com/file/p24147811/Load-test.inp Load-test.inp
> >> --
> >> View this message in context:
> >> http://www.nabble.com/zero-Force-everywhere%21%21-tp24147811p24147811.html
> >> Sent from the Abaqus Users mailing list archive at Nabble.com.
> >>
> >
> >
> >
> >
>
> --
> View this message in context: http://www.nabble.com/zero-Force-everywhere%21%21-tp24147811p24259352.html
> Sent from the Abaqus Users mailing list archive at Nabble.com.
>
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