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#1 2019-09-02 10:20:26

nirmaljoshi
Member
From: Japan
Registered: 2018-10-12
Posts: 181

varying E with time using ELAS_FO

Hi all,
Could you please help me for the following task.

I have to model a concrete prism whose elasticity(E) decreases with time (0 to 365 days). I want to calculate displacement with respect to time for a constant load. 

Using the method mentioned in the posts at forum2/viewtopic.php?id=24091 and forum2/viewtopic.php?id=20431, I wrote my analysis file. It runs, but there is no evolution of E with time- resulting in constant deformation for all the time steps.

What am I missing? Please help. File is attached.

Last edited by nirmaljoshi (2019-09-02 10:43:43)


Attachments:
varyE_again.zip, Size: 8.87 KiB, Downloads: 44

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#2 2019-09-03 05:54:30

nirmaljoshi
Member
From: Japan
Registered: 2018-10-12
Posts: 181

Re: varying E with time using ELAS_FO

It seems in CREA_CHAMP (AFFE=_F(.. VALE=(365)) is causing the calculation to give constant displacement.  When I try to use VALE_F=somefunction, it gives error saying "inconsistency between component count and many values".

So is there any way to change the time within CREA_CHAMP or CREA_RESU?

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#3 2019-09-03 15:06:33

manonB
Member
From: Allemagne
Registered: 2019-04-02
Posts: 68

Re: varying E with time using ELAS_FO

Hello,

When you created your field using the VALE_F with your function, did you use the ELNO_NEUT_F field?
You usually get this error if you use ELNO_NEUT_R.

Manon

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#4 2019-09-04 04:34:35

nirmaljoshi
Member
From: Japan
Registered: 2018-10-12
Posts: 181

Re: varying E with time using ELAS_FO

Dear Manon,
Thanks for pointing towards correct direction.

Using ELNO_NEUT_F field prevented that error. But now i get error saying "only the fields of functions to the nodes are appraisable: CHAMP_ELEM_NEUT_F" while i invoke CREA_RESU using the field created by the CREA_CHAMP.

When I use NOEU_NEUT_F, the error disappears, but again, there is no effect on the elasticity and i get constant displacement (file attached).

I am stucked!

Last edited by nirmaljoshi (2019-09-04 04:36:05)


Attachments:
varyE_2.zip, Size: 8.94 KiB, Downloads: 36

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