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Updated: 23 hours 32 min ago

Modeling boundaries

Thu, 2018-06-14 11:25

In reply to Journal Club for June 2018: Modeling dislocation mediated plasticity using meso-scale discrete dislocation dynamics

Dear Ill, 

Thank you for an insightful overview of mesoscale plasticity modeling. As you pointed out, one of the outstanding challenges is modeling dislocation-interface interaction. What are the barriers toward developing a set of rules for such interactions? Does stochasticity have a role to play? Are there efforts in the concurrent modeling approach to model interfacial regions using atomistic discretization while the bulk regions may be modeled using DD/ homogenized continua? 

 

Thanks,

Shailendra  

Unified Mechanics Theory

Tue, 2018-06-12 11:38

In reply to Unified Mechanics Theory

 

 

 

I welcome any comments.Thank you very much.

Normal

Mon, 2018-06-11 09:31

In reply to CEMEF PhD thesis 2018 : Numerical modeling of thin products forming under complex loads

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Application online only : fill in the form on line : http://www.recruitment.cemef.mines-paristech.fr/phd/form1.php

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Mon, 2018-06-11 09:31

In reply to CEMEF PhD thesis 2018 : Numerical modeling of thin products forming under complex loads

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Application online only : fill in the form on line : http://www.recruitment.cemef.mines-paristech.fr/phd/form1.php

Dear afallah,

Wed, 2018-06-06 07:04

In reply to What‘s the timing of calling a abaqus user subroutine?

Dear afallah,

 

Thank you for your suggestion. What I am seeking is an overview of the calling logic of user subroutines. But, yes, the abaqus documentation is an encyclopaedia of abaqus, and I could look through it while I am waiting for the answer.

 

Best regards,

 

liebealt

 

timing of calling a abaqus user subroutine

Wed, 2018-06-06 06:27

In reply to What‘s the timing of calling a abaqus user subroutine?

liebealt

it is clearly explained for each subroutine in the abaqus user subroutine documentation which can be easily downloaded from the internet. You can google the "writing user subroutine with abaqus" to find it.   

Ph. D and Post-doc Positions Open

Mon, 2018-06-04 07:44

In reply to Ph.D and Post-doc Positions Open

Ph. D and Post-doc positions are open for Fall 2018 and Spring 2019 in ‘Mechanics, Biomimetic, and 3D Printing’ research lab in the Department of Mechanical Engineering at the University of New Hampshire (UNH). 
The students will work on research projects funded by National Science Foundation (CAREER award) and Department of Defense/Air Force Office of Scientific Research under the supervision of Professor Yaning Li. 
Professor Li got her Ph.D degree from the University of Michigan Ann Arbor, B.S. and M.S degrees from Shanghai Jiao Tong University. Before joining UNH in 2012, she worked as postdoc associate at Massachusetts Institute of Technology (MIT) for four and half years. More information can be found at:
http://www.unh.edu/yaning-lab/
Students with background in solid and structure mechanics, mechanics of materials, finite element simulations, and mechanical experiments are encouraged to apply. 

Email: yaning.li@unh.edu
Office: 1-603-862-4898
Mailing address:  W111, Kingsbury Hall
                             Department of Mechanical Engineering
                             University of New Hampshire
                             Durham, NH03824

Thanks

Wed, 2018-05-30 22:45

In reply to Dear Xiaoyan,

Dear Jianying,

Thank you very much for your reply and your contributing such interesting topics.

I look forward to hearing your thoughts

Wed, 2018-05-30 16:10

In reply to Journal Club for June 2018: Modeling dislocation mediated plasticity using meso-scale discrete dislocation dynamics

I look forward to hearing your questions and comments.

 

Sharing UMATs via Mendeley Data

Wed, 2018-05-30 03:15

In reply to Sharing ABAQUS UMAT and VUMAT subroutines

Elsevier Journals offer the opportunity to share things like UMATs as supplementary material to the respective journal articles. It can be published under a Creative Commons license and you can update the source code at any time.  We published the UMAT of our current article (a gradient-enriched damage model) at

https://data.mendeley.com/datasets/p6bgny6ff3/1

Geralf

 

Avoiding changes in the environment file

Wed, 2018-05-30 03:05

In reply to re: running free format fortran

Some comments:

a) In order to avoid to change the environment file, you can set compile options also within the source code by means of compiler directives. For the Intel Fortran compiler, you just need to add

!DEC$ FREEFORM

at the beginning of the source code. The file can retain the suffic .f ( or .for in windows) and you just run it with

abaqus -j jobname user=UMAT

b) If you want to use explicit type declaration without defining the types by hand or making copies of the file ABA_PARAM.INC, you can readout the latter from Abaqus within a module which you define before your UMAT (or any other user subroutine):

MODULE ABQTYPE
   INCLUDE 'ABA_PARAM.INC'
   INTEGER,PARAMETER,PUBLIC::AbqRK=KIND(r),AbqIK=KIND(i)
END MODULE

Now you can read the use the parameters AbqRK and AbqIK within your subroutine

USE ABQTYPE

IMPLICIT NONE

REAL(KIND=AbqRK)::variable1

INTEGER(KIND=AbqIK)::variable2

to define all variables explicitely with the correct kind. This procedure does not require any changes in the environment file either.

Geralf

Registration for Indentation 2018

Tue, 2018-05-29 22:35

In reply to Next Indentation workshop (SF2M-GIME) in Liège (Belgium) in september 2018.

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Dear colleagues,

 

The next indentation symposium from the Groupe Indentation Multi-Echelle (GIME) will be held in Liège (Belgium) on 11-14 September 2018.  The conference gathers every two years, scientists and industrials concerned by the problems of mechanical characterization of surfaces. In 2018, this conference is organized by Belgian scientists: ULg, CRM Group, UCL et UMons. 

 

The programme of this not to be missed event is already available : 

Overview: http://aimontefiore.org/INDENTATION2018/index.php/program/full-overview 

Detailed programme:  http://aimontefiore.org/INDENTATION2018/openconf/modules/request.php?module=oc_program&action=program.php&p=program 

 

Do not wait too long to register, reduced rates are available until 22 June

http://aimontefiore.org/INDENTATION2018/index.php/registration 

 

Hoping to see you in Liège in September 2018.

 

Best regards

 

The Indentation 2018 organizing team

Abaqus mailing list

Tue, 2018-05-29 02:19

In reply to How to combine VUMAT an VUEOS in Abaqus

Hello

 

subscribe to and seek assistance from the

ABAQUS mailing list

https://groups.yahoo.com/neo/groups/Abaqus/info

Search the archive of the list before posting in it.

The list does not accept attachments.

 

Or 

http://www.eng-tips.com/threadminder.cfm?pid=799

or from the ResearchGate discussion forum.

 

As an introduction to subroutines get the file

http://imechanica.org/files/Writing User Subroutines with ABAQUS.pdf

 

Good luck

 

Frank

Hello dears

Fri, 2018-05-25 16:32

In reply to ABAQUS Tutorial and Assignment #1

Hello dears

I need your help

How can i model the beam for torsion in Abaqus software?and also how can i design and model a beam by GFRP shell whit the Abaqus software

Congratulations!

Tue, 2018-05-22 12:40

In reply to 2018 Warner T. Koiter Medal – Professor Taher Saif

My heartiest congratulations to Professor Saif! Well deserved!

Great book!

Mon, 2018-05-21 08:34

In reply to a new book "Contact Mechanics" from JR Barber

Hopefully I can use it as a textbook in near future.

Abaqus mailing list

Mon, 2018-05-21 06:26

In reply to Abaqus Cordinate System Rotation

Hello

 

subscribe to and seek assistance from the

ABAQUS mailing list

https://groups.yahoo.com/neo/groups/Abaqus/info

Search the archive of the list before posting in it.

Good luck

 

Frank

Hi Marco,

Sun, 2018-05-20 12:42

In reply to Very interesting idea,

Hi Marco,

Thank you for your feedback on my work. The gauge factor of our device based on graphite flakes was around 46. I could get even higher values by lowering the desnity of the coated layer (higher sheet resistance samples). However, I also had to care about high conductivity of my decive for low-voltage actuation. Therefore, there was a trade-off between gauge factor and electricual conductivty and I had to choose avarage values for both. Further information on the peformance of the stae-of-art strain sensors can be found in my recent review artilce below:

Stretchable, Skin‐Mountable, and Wearable Strain Sensors and Their Potential Applications: A Review (https://onlinelibrary.wiley.com/doi/full/10.1002/adfm.201504755)

Best,

Morteza

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