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shock test in abaqus

 

Hello to all,


I want to model a shock test on diabolo (caoutchouc) using viscoelasticity property (Prony series) and Hyperelastic material with step «dynamic explicit".


My worry: I don’t find hysteresis curve results! ( As find in experimental test).


Please what is the problem??


Can I use «Viscoelasticity" to model shock test???


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Posted by: nadiabelghithia <at> yahoo.fr
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2D and 3D assembling

 

Hi

I am working with ABAQUS to model a reinforced concrete solid. In order to decrease the used memory i need to decrease the meshing so i decided to model reinforcing bars in 2D as beam element. The problem is that i can not assemble 2D, reinforcement, and 3D, concrete solid. There is a error report stating that there are parts which are not dimensionally matched. Please guide me how can i assemble 2D and 3D models. Thanks.


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Posted by: behzad_alb <at> yahoo.com
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Nonlinear Temperature Modeling

 

Hey

I am modeling prestressed concrete with nonlinear properties. i am using
C3D4T elements. i have no issues with the model with normal mechanical
loads. but when i introduce temperature abaqus gives me an error saying that
the too many increments for this step. can anyone give me ways to deal with
this

thanks for the help

--
View this message in context: http://abaqus-users.1086179.n5.nabble.com/Nonlinear-Temperature-Modeling-tp21821.html
Sent from the Abaqus Users mailing list archive at Nabble.com.

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Posted by: ramapran <ramapran <at> buffalo.edu>
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Need Help for FILM user subroutine

 

Hi,

I am working on thermal conductivity through cavity walls using Abaqus/CAE software. My model has two walls with cavity air. I have given the external temperature, emissivity, film coefficient on external wall outside face. Then predefined field was used to define initial temperature of the whole model. After that internal wall face emissivity and film conditions are defined. Now I need to define the film coefficient on the inside faces of the cavity. Please help me to find a way to define this using user subroutine.I just need to get the void air to conduct the heat from external wall cavity face to internal wall cavity face. I think this is related to the cavity being heated up and conduct heat through the void to the internal wall.

Thank you
Rusthi


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Posted by: mohamed.rusthi <at> yahoo.com
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strain controlled test

 

Hello

I'm looking to model my strain controlled fatigue test.
I cannot find a way to do it directly on abaqus cae.
It seems that I have to use a subroutine.
Can someone help me on how to do it? Is there an easy way?

Thank you in advance.

Camille

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Posted by: Camille Gandiolle <camille.gandiolle <at> ec-lyon.fr>
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APPLYING A FAILURE CRITERION TO AN ISOTROPIC ELASTIC MATERIAL

 

Hello! I am an ABAQUS user and I want to introduce a failure criterion to an elastic isotropic material (such as an epoxy resin). As I have recently justified the ABAQUS gives this capability only for transversely orthotropic materials (like fiber composites). Have anybody of you ever faced a similar matter? Is there any other capability that I have not noticed yet? Thanks! Eleni.    

--
----------------------------------------------------------------------------------------------------------------------------------------------------
Eleni Fiamegkou
Dipl.-Ing. Mechanical

 PhD Candidate
Applied Mechanics Laboratory (AML)
Mechanical Engineering and Aeronautics Department University of Patras 26500
Rion-Patras GREECE
http://aml.mech.upatras.gr
 
Tel: +30 2610 969447
Fax:+30 2610 969417
Mobile: +30 6977 352438
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Posted by: ELENI FIAMEGOU <elfiameg <at> mech.upatras.gr>
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low cyclic fatigue loading for brittle fracture.

 

Hi all, I am a beginner in using ABAQUS . I am doing a project on the fatigue analysis of graphite ( brittle material ) with a cyclic loading and trying to determine the number of cycles required for fatigue failure. I have a crack in the specimen and the specimen is loaded as in a 3 point bend specimen. I have gone through the Abaqus manual and have read about low cycle fatigue and the VCCT criteria. But I am finding it difficult to work with the input files. Can anybody tell me how I should proceed?? Can i do it entirely using only the abaqus cae usage and not the input files?? If I have to use the input files, can somebody share an input file, if you have done a similar work??


Any help or advice will be really appreciated. I a m finding it really difficult to proceed my work


Thanking in Advance


Hafiz

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Posted by: mn_nazer <at> yahoo.co.in
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Error while importing file

 

Hi, I am new user in abaqus. I am working on the fatigue analysis of brittle materials. I tried to import an input file which has been given in the ABAQUS examples manual. But it was not imported and showed an error 


"WARNING: The input file contains one or more data items which have been parameterized. Parameterized input files can not yet be imported into Abaqus/CAE. This occurred while scanning input file for parameterized data. The input file will not be imported."


Can anybody tell me how to solve this??


Given below is the link to the input file that I had used


http://www.tu-chemnitz.de/projekt/abq_hilfe/docs/v6.12/books/eif/dcb_vcct_fatigue_2d.inp


Being a beginner, I am not that good in dealing with input files. So if any changes has to be made in the input file, can anybody tell me exactly what to do??


Any kind of help or advice will be really appreciated


Thanking in advance


Hafiz



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Posted by: mn_nazer <at> yahoo.co.in
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any one knows how to implement zener hollomon equation to abaqus?

 





Hi everyone,

I have created a welding model in ABAQUS but right now I would like to add zener hollomon equation to predict the microstructure then mechanical strength. is there anyone has implement this technique into abaqus? Or is there any other method to adopt it in order to predict the microstructure of the material?


Thanking in advance,
Hemin


iv>
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Posted by: Hemin Mohyaldeen <hemin.mohyaldeen <at> yahoo.com>
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Impact Data Transfer

 

Hi all 

I am currently modelling a shear after impact test of composite materials. To do this I am using 2 models, 1 to impact and the other to shear my specimen. Normally I would try and do this all in one model but I want to use VCCT to model the delamination propagation in the shear step. 

To do this I first need a crack to select as a start point of my delamination. The initial delamination is reliant on a cohesive interaction between the plies. I am then exporting the deformed mesh of my plate into another model so that I can manually select the crack tips to apply the VCCT method. 

The problem I am currently facing is that while this method makes the delamination propagation easy to model, I lose the data assosciated with the fibre breaking/matrix cracking that I am modelling using Hashin criteria. 

Does anyone have any ideas how to either transfer this data into my new model or a better approach to modelling the entire thing? 

Cheers
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Posted by: Andy Sutton <andisutt <at> gmail.com>
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frz_ti@yahoo.com [Abaqus] | 6 Sep 12:21 2014
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Integration point of C3D8R

 

Hi All


according to the face that http://web.mit.edu/calculix_v2.4/CalculiX/ccx_2.4/doc/ccx/node19.html the C2D8R has ONE integration point

in calculation of the IVOL , I would like to know the meaning of calculation of the ELEMENT VOLUME at INTEGRATION point , it seem contradictional to me and nowhere I found the explanation that what does it mean  :


the VOLUME at a POINT ??


thank you very much

 

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Posted by: frz_ti <at> yahoo.com
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Gmane