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Due to numerous requests for an extension, the new abstract submission deadline is now 1 December 2014. Also, since an initiative to organize a thematic session during the Congress has been recently proposed to the Congress Co-chairmen, we have decided to offer such possibility to other participants as well. More detail can be found at http://www.8iccsm.com/en/thematic_sessions/45/34. The new deadline for abstract submission is 1 December 2014. To submit an abstract, please register at http://www.8iccsm.com/registration.asp. Abstract template can be found at http://www.8iccsm.com/upload/ICCSM2015_Abstract_Template.doc. After your account has been authorized you will receive an email with login information. Please login at http://www.8iccsm.com/kaut.asp to submit your abstract. You will be notified of the abstract acceptance by 15 January 2015. Full papers should be submitted by 15 April 2015.
I would like to know what would be the last date for applying for this position ?
In reply to my "stiffness" matrix comes out singular?
I have come to find out that the model as described below is "structurally" singular. Consequently, it appears I have to solve it by finding the Moore-Penrose pseudo-inverse of the final matrix.
Email me at dibakar_datta[AT]brown.edu. I will send the files.
I could not download "Problems & Solutions :: Molecular Simulations in Mechanics and Physics" file. Could you check it or could you tell me how to download this material?
In reply to material nonlinearity
I have experience with the arc-length methods yes. If you have material nonlinearity, you can either use very small arc-lengths which however limits the use of the method. Are you using the classical arc-length method? It works very well with geometrically non-linear problems, BUT for strong slip localisation causing a global snap-back response, it may fail. Thats why one may have to use either the crisfield method (Cylindrical arc-length method ) which involves a non-linear constraint for the arc-length. But its numerically very expensive. If such methods are not available, you may have to implement new methods. There are many arc-length methods with the same underlying principle. The method of chen and schreyer (A numerical solution scheme for softening problems involving total strain control, Computers and structures; 37 (6) , 1990, pages: 1043-1050) is based on using strain as control parameter. You can also check the method by May and Duan (A local arc-length method for strain softening; Computers and Structures, vol 64 . 1997, pages 297-303)These are non-standard methods which you may have to implement by yourself. Hope it helps
In reply to ANSYS/LSDYNA
i am doing experimental investigation of springback effect on CFRP .
i wanna do analysis of that process through quasi/static modelling
kindly guide me ,
I have a problem with UMAT subroutine usinage.
I wrote a UMAT subroutine for my material and I want to implement it in Abaqus but I don't know how can I do this. How can I introduce this code to Abaqus and run the simulation. I'll be glad if you help me to do this.
Congratulations to Huajian for such a distinguished honor! Well-deserved!
Congratulations to Prof. Gao for the leadership in applied mechanics!
In reply to Hi, There are several arc
In my case there is a material nonlinearity problem, I can not properly impose arc length in nonlinear material. Do you have any experience in it?
In reply to Strain hardening
Dear Professor Sue,
Firstly, thanks a lot for your very instructive notes. This is very generous of you to share them on iMechanica.
I was windering if I can ask a question regarding the strain hardening model. Is it possible to add the Bauschinger's effect to this strain-hardening model? In that case, the compressive yield stress \sigma_YC will be 2Y-\sigma_YT, where Y is the first Yield stress in tension, and \sigma_YT denotes the new yield stress in tension?
Thanks so much
In reply to initial void ratio for soil
I have the same problem. Do you solve that error? If you did please give me some informations!
All the best
In reply to T = 1/10 = 0.1s. So for
i am modelling a composite plate subjected to a cyclic loading
i wnat to model a 1000 cycle with 10 hz frequency.
i have some question from you.
is it possible to use static,general as step?
on the other hand , i use umat subroutine for egradation of properties, i want to have a degraded properties,in each cycle.
is it true that i assme that every increment is 1 cycle?
and at last, i dont understand what exactly,do you mean in this sentences "Recommendation will be to load in one step and unloading in another step"
can you explain it?
In reply to PhD studentship at URV, Tarragona, Spain
<p>Dar Prof. Huera,</p>
<p>My research fields exactly coincides with your research areas. I sent an email to you yesterday with my CV attached. I will appreciate you if you take a look at my CV.</p>
<p>Thanks in advance</p>
<p>Email: <a href="mailto:firstname.lastname@example.org">email@example.com</a></p>
In reply to Displacement Controlled Analysis
hello Mr Jahanshahi
thank you so much for your attention.
I will do what you said.
In reply to Geometric nonlinearity
Why do you use line 4 method for computing internal force? I think this is the problem. Use ordinary method for internal force, Just like the method introduced in " introduction to finite elements in engineering" ,by chandrupatla or every other fnite element book, to make your internal force vector.
look for this article "COMPOSITE MATERIALS IN COMPRESSION " by Jens Lycke Wind, In this thechnical report you can find an algorithm for Newton raphson.
I used it before for load base problem but i could not write a code for material nonlinearity which is under displacement BC, and displacement control.
Ask me if there is some thing to ask, our ways are similar. maybe we can help each other in the modeling
In reply to arc length in delamination
Hi, There are several arc-length methods that could be used. But depending on the level of non-linearity, they may or may not be able to trace snap-back exactly.
Geometrical nonlinearity simple arc-length method should be sufficient. But in case of severe strain localization, you would need a method like the one suggested by
Crisfield arc-length method. Try this one, incase this one does not work, I may have other suggestions.