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Updated: 7 hours 45 min ago

This paper has been accepted

Thu, 2017-10-19 00:51

In reply to Computing Singularly Perturbed Differential Equations

This paper has been accepted to appear in Journal of Computational Physics. The revised version has been uploaded. 

Please find attached the

Wed, 2017-10-18 02:23

In reply to Postdoctoral position at the LTDS UMR CNRS 5513, ENTPE, University of Lyon

Please find attached the announcement of a postdoctoral position at the "Laboratoire de Tribologie et Dynamique des Systèmes" (LTDS) UMR CNRS 5513 in ENTPE.

You can insert the lines in

Wed, 2017-10-18 02:06

In reply to How to get stiffness matrix from Abaqus using python??

You can insert the lines in the inp file just using python instead of manually inputting them

energy field output

Sat, 2017-10-14 04:50

In reply to How to request energy field output in ABAQUS Python

Did you request the output of ELEN appropriately ?

Paste a section of your input-file here.

 

error in subroutine

Sat, 2017-10-14 04:40

In reply to Abaqus User defined Routines

 

Subscribe to and seek assistance from the
ABAQUS mailing list
https://groups.yahoo.com/group/r
or
http://www.eng-tips.com/threadminder.cfm?pid=799
or from the ResearchGate discussion forum.

Search the archive of the list before posting in it.
The list does not accept attachments.

Good luck

Frank

Беспокоит межпозвоночная грыжа? Лечение есть - Тренажер МТБ

Fri, 2017-10-13 15:28

In reply to IUTAM Symposium on Architectured Materials Mechanics: Call for abstracts

Упражнения Бубновского для позвоночника, снимающие боль
1. Встаем на четвереньки и расслабляем спину.
2. Не меняя положения, прогибаем спину: очень медленно выгибаем на выдохе и прогибаем на вдохе (20 раз).
3. В том же положении: садимся на левую ногу, потом правую ногу вытягиваем назад, а левую руку тянем вперед. Упражнение называется «растягивающий шаг, выполняется медленно, не резко. Поочередно меняем руки, ноги, и повторяем двадцать раз.
4. Становимся в положение «упор на ладони и на колени»: максимально вытягиваем свое тело вперед, не отрывая ладоней и коленей от пола. При этом не прогибаемся в пояснице. Данное упражнение называется «прокачка».
5. Положения не меняем: сгибаем руки в локтях и на выдохе опускаемся на пол, затем медленно делаем вдох. Далее на выдохе выпрямляем руки, опускаемся тазом на пятки и растягиваем поясничные мышцы. Повторить — 6 раз. Таким образом происходит растяжка всей спины.
6. Ложимся на спину: ноги сгибаем в коленях, руки за головой. Прижимаем подбородок к груди, потом сгибаем туловище на выдохе так ,чтобы оторвались от пола лопатки и локти коснулись коленей. При выполнении должно появляться чувство жжения в животе. Называется такое упражнение — вытягиванием живота.
7. Лежим на спине, вытягиваем руки вдоль тела: на выдохе поднимаем таз на полом, как можно выше, опускаемся на вдохе. Повторяем данное упражнение 25 раз, его название — подъем таза.
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Sometimes you need to change

Fri, 2017-10-13 14:34

In reply to How to request energy field output in ABAQUS Python

Sometimes you need to change the position, from Integration point to nodes, depends where that parameter is calculated, you might need to refere to abaqus help

Hi Armanamd, just wodering if

Thu, 2017-10-12 12:33

In reply to mesh in cohesive surface

Hi Armanamd, just wodering if you have solved your listed problems?

The position is gone.

Thu, 2017-10-12 10:16

Shall I make my routine

Wed, 2017-10-11 21:37

In reply to Abaqus User defined Routines

Shall I make my routine openmp compatible?

Tons of Thanks!!!

Tue, 2017-10-10 11:27

In reply to 'Therefore, [∂F^-1_ij / ∂F_mn

Your explaination is very clear, I must say.

'Therefore, [∂F^-1_ij / ∂F_mn

Tue, 2017-10-10 03:57

In reply to Derivatives of Tensors

'Therefore, [∂F^-1_ij / ∂F_mn ] F_jk = - F^-1_ij [∂F_jk / ∂F_mn]'. The derivation up to this line is correct.

In the next step. Multiply both sides of the equation by F^-1_kp instead of F^-1_jk. Note that F_jkF^-1_kp=δ_jp. 

In your derivation, F_jkF^-1_jk is mistakenly taken to be 1, which makes the result wrong.

Anisotropic hardening

Mon, 2017-10-09 10:12

In reply to A question about anisotropic plastic

Anisotropic hardening seems to be the subject of recent research. I cannot think of a completely general model that might suit you, but perhaps basic kinematic hardening might be applicable, as this is a (simplified) form of anistropic hardening. You could also look into distortional hardening models developed by Dafalias and others, though they are primarily concerned with special features  like the flattening of the yield-surface.

Thanks!

Mon, 2017-10-09 08:38

In reply to Take a look at this link, i.e

Thanks for pointing to Kelly's notes. I read these notes last year, but missed this part.

 

Take a look at this link, i.e

Mon, 2017-10-09 05:48

In reply to Derivatives of Tensors

Take a look at this link, i.e. Equation (1.15.18).

http://homepages.engineering.auckland.ac.nz/~pkel015/SolidMechanicsBooks...

Notes on entropy are updated

Sun, 2017-10-08 12:05

In reply to Entropy

In this version, I moved a few more items to suplemeents.  I have also modified a few places.

This is a treasure trove of

Sat, 2017-10-07 08:38

In reply to Why do people become registered users of iMechanica?

This is a treasure trove of information. Thanks for sharing this. Just like in music, you have to know how to buy soundcloud plays

Analysis is being terminated from a user subroutine

Wed, 2017-10-04 04:02

In reply to [Abaqus] UEL user subroutine

No one would want to open an obscure zip file.

Subscribe to and seek assistance from the
ABAQUS mailing list
https://groups.yahoo.com/group/r
or
http://www.eng-tips.com/threadminder.cfm?pid=799
or from the ResearchGate discussion forum.

Search the archive of the list before posting in it.
The list does not accept attachments.

For an intro to subroutines get the file
http://imechanica.org/files/Writing User Subroutines with ABAQUS.pdf

Good luck

Frank

***ERROR: USER SUBROUTINE UMAT IS MISSING

Wed, 2017-10-04 00:19

In reply to Using User Subroutine UMAT in abaqus

<p>I got the same error. I think this error can be resolved by changing the boundary condition(Displacement/rotation) from User-defined to uniform</p>

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