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Updated: 14 hours 47 min ago

Hi Frank,

Mon, 2014-09-01 04:51

In reply to How to apply thermal an mechanical load at the same time?

Hi Frank,

thanks a lot.

The way i have it right now:
1) Create a Predefined Field in the initial step with the ambient Temp. Constant 15 degree.
2) Create a static step with the Load (60kN)
3) Create a Coupled Temp Displacement step, where the heating starts. The heating is defined only by Interactions (radiation and convection) which are depending on the Amplitude I defined (Temp.Curve)
4) The fourth step is like the third with a different mechanical load.

I was hoping that this will work but unfortunatelly I get following error:
"in keyword *INITIALCONDITIONS, file "Test.inp", line 180311: Unknown part instance name 15

I am using CAE, nevertheless the .inp file looks like this:
"** Name: AmbTemp   Type: Temperature
*Initial Conditions, type=TEMPERATURE
"Whole Beam-1"."Part - Whole Beam", 15., 15., 15., 15., 15., 15., 15., 15., 15., 15., 15."

 

Edit Predefined Field:
Distribution: Direct Specific
Section Variation: Constant through region
Magnitude: 15 I am using:- homogeneous shell sections (should I use beam?)
- and as element types: Coupled Temperature-Displacement (S4RT) Does anyone have an idea what wrong is in my model?
Thank you guys very much. Jonathan

 

My email ID

Sat, 2014-08-30 06:51

In reply to tell me your mail address.i

You may use this one, without spaces:
a j 1 7 5 t p  
a t
y a h o o
d o t
c o
d o t
i n 

 

--Ajit
[E&OE]

Hi,could you please give me

Sat, 2014-08-30 06:44

In reply to Hi,could you please give me

hi, i want to ask the same quiestion too. please help

 

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tell me your mail address.i

Fri, 2014-08-29 15:52

In reply to Re: Suggestions for minor project

tell me your mail address.i will send you my cv

sir, currently i am working

Fri, 2014-08-29 15:49

In reply to Re: Suggestions for minor project

sir, currently i am working on abaqus solving problems. i can devote upto 7-8 hrs a week for the work.

As I researched further, I

Fri, 2014-08-29 12:24

In reply to Question regargding ductile damage criterion in Abaqus

As I researched further, I noticed that both ductile and shear fracture criteria models in Abaqus are inspired from a paper published by Hooputra et al. (2004). However, although other properties (such as temperature) are not involved in Hooputra's fracture models , we can introduce them in a tabular form in the software. So my question is if Abaqus make a function of fracture at strain necessarily in the form of the functions introduced by Hooputra et al. ,or it could be a function in any arbitrary form which is obtained by curve fitting ? I am just wondering what the software will do after we enter our tabular data. 

Cheers, 
Reza

Thanks Louie

Fri, 2014-08-29 07:24

In reply to You are right the sotware link is broken

Hi Louie,

 

Thanks a lot, I emailed him.

 

Cheers

 

Juli

Re: Fracking

Thu, 2014-08-28 17:31

In reply to new paper on fracking in JAM by Prof. Bazant

This is a very interesting paper.  It will help not only the fracking community but also the hydrothermal engineering community.   Thank you, Yong, for providing it to the community for free.

-- Biswajit

P.S.  Hari Viswanathan's name is mis-spelled in the list of authors.

You are right the sotware link is broken

Thu, 2014-08-28 14:09

In reply to look at Sukumar's web page

Hi Juli,

You are right, the software link is broken.  If you email professor Sukumar he will probably fix the link.

regards,

Louie

look at Sukumar's web page

Thu, 2014-08-28 14:01

In reply to Where are the libraries?

Hi Juli,

click on the following link and at the bottom of the page you will see where you can get the Maxent software.

http://dilbert.engr.ucdavis.edu/~suku/maxent/

regards,

Louie

Yes!

Thu, 2014-08-28 13:44

Thanks A lot for the response

Thu, 2014-08-28 10:43

In reply to Hello Reza,

Hello Ravi,

Thank you for your response. Would that mean I can plug in  triaxility and fracture strain (or even more properties such as strain rate and temperature) for  an arbitrary damage model and Abaqus will create a damage function through interpolation? I am wondering what exactly does the software do in this case.

Regards,

Reza

 

 

 

Regards,

Reza

 

Where are the libraries?

Thu, 2014-08-28 09:14

In reply to Fortran 90 library for maximum-entropy basis functions

Good morning,

I was following through your literature this maximum-entropy concept. Where is the code? This link is referentiated. I am new, and might be I am doing something wrong and then I cannot see the attached file that you commented (sorry if that is the case).

 

Best regards and thank you very much in advance

 

Juli

Hello Reza,

Wed, 2014-08-27 20:17

In reply to Question regargding ductile damage criterion in Abaqus

Hello Reza,

                 In this case, Abaqus does not provide any functional form for fracture strains in terms of triaxiality. Instead, you have to enter triaxility and fracture strain points in the table format. For further details see: http://www.sciencedirect.com/science/article/pii/S0013794414002203

-Ravi  

SHPB

Wed, 2014-08-27 16:14

In reply to Abaqus

Hi all,

I want to learn the steps of the simulation program on the subject of Abacus about (split Hopkinson pressure bar compression)with and without effect temperature .This device gives high strain rate impact where it two long bars between it put the specimen and then strike with short bar. Our data collection system consists of a pair of strain gages midway along each bar. Data is recorded and presented as the initial impulse wave passes the incident bar strain gages, a reflected pulse from when the wave hit the end of the bar and reflected back to the incident bar strain gage and finally a transmitted pulse which is what remains of the wave after it has passed through a sample. In all cases the voltage reading from the strain gages should return to zero once the wave has passed. However with the new bar the signal lingers after the wave has passed a gage.
my version 6.12
Please anyone can help me
regards

SHPB

Wed, 2014-08-27 16:04

In reply to ANSYS vs ABAQUS in high frequency wave simulation

Hi all,

I want to learn the steps of the simulation program on the subject of Abacus about (split Hopkinson pressure bar compression)with and without effect temperature .This device gives high strain rate impact where it two long bars between it put the specimen and then strike with short bar. Our data collection system consists of a pair of strain gages midway along each bar. Data is recorded and presented as the initial impulse wave passes the incident bar strain gages, a reflected pulse from when the wave hit the end of the bar and reflected back to the incident bar strain gage and finally a transmitted pulse which is what remains of the wave after it has passed through a sample. In all cases the voltage reading from the strain gages should return to zero once the wave has passed. However with the new bar the signal lingers after the wave has passed a gage.
my version 6.12
Please anyone can help me
regards

SHPB

Wed, 2014-08-27 16:01

In reply to Sharing ABAQUS UMAT and VUMAT subroutines

Hi all,

I want to learn the steps of the simulation program on the subject of Abacus about (split Hopkinson pressure bar compression)with and without effect temperature .This device gives high strain rate impact where it two long bars between it put the specimen and then strike with short bar. Our data collection system consists of a pair of strain gages midway along each bar. Data is recorded and presented as the initial impulse wave passes the incident bar strain gages, a reflected pulse from when the wave hit the end of the bar and reflected back to the incident bar strain gage and finally a transmitted pulse which is what remains of the wave after it has passed through a sample. In all cases the voltage reading from the strain gages should return to zero once the wave has passed. However with the new bar the signal lingers after the wave has passed a gage.
my version 6.12
Please anyone can help me
regards

Hi all,

Wed, 2014-08-27 16:01

In reply to Collecting phenomena of large elastic deformation

Hi all,

I want to learn the steps of the simulation program on the subject of Abacus about (split Hopkinson pressure bar compression)with and without effect temperature .This device gives high strain rate impact where it two long bars between it put the specimen and then strike with short bar. Our data collection system consists of a pair of strain gages midway along each bar. Data is recorded and presented as the initial impulse wave passes the incident bar strain gages, a reflected pulse from when the wave hit the end of the bar and reflected back to the incident bar strain gage and finally a transmitted pulse which is what remains of the wave after it has passed through a sample. In all cases the voltage reading from the strain gages should return to zero once the wave has passed. However with the new bar the signal lingers after the wave has passed a gage.
my version 6.12
Please anyone can help me
regards

Suggestions for minor project

Wed, 2014-08-27 09:03

In reply to Suggestions for minor project

Please email me your CV at : dibakar_datta [AT] brown.edu

I can suggest you some potential problems. 

Regards,

DD

Answer

Wed, 2014-08-27 07:12

In reply to Error msg in ABAQUS

you should chech the property module or anywhere that you enter the temperature dependent properties. sometimes maybe a row is repeated or the data maybe entered in descending order 

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