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Grants available EC funded "Materials resistant to extreme conditions for future energy systems", 12-14 June 2017, Kyiv - Ukraine

Dear colleagues,

I would like to inform you about a Works "Materials resistant to extreme conditions for future energy systems", 12-14 June 2017, Kyiv – Ukraine.

The Workshop is funded by the European Commission Enlargement Programme. There is no fee to attend.  Participants from the target countries* can apply for a Grant to cover their cost.  Eligible for Grants are those that work in or are citizens of a target country.

Zhigang Suo's picture

Nonlinear viscosity

The attached notes are written for a course on plasticity.  When I update the posts, I will write a note on my twitter account:  https://twitter.com/zhigangsuo.  

CONCREEP-10 Conference

CONCREEP-10,  the 10th Conference on Mechanics and Physics of Creep, Shrinkage and Durability of Concrete and Concrete Structures, will be organized  by the Vienna University of Technology (TU Wien) in cooperation with the Engineering Mechanics Institute of ASCE (EMI).  The conference will be held on September 21-23, 2015 at the  Vienna University of Technology in Vienna, Austria.  It will be chaired by Prof. Christian Hellmich, Prof. Johann Kollegger, and Prof. Bernhard Pichler, all of TU Wien.

Soud Choudhury's picture

Abaqus is not reporting any CEEQ in coupled temp-displacement step

Hi all,

I am modeling a simple coupled temp-displecment analysis with the following step information:

** MATERIALS

** 

*Material, name=Material-1

*Conductivity

 1e-06,

*Creep, law=HYPERB

44000., 0.005,   4.2, 45000., 8.314

*Elastic

60000., 0.34

*Expansion, zero=25.

 1.4e-05,

*Plastic

20.,  0.

60., 0.1

** 

** PHYSICAL CONSTANTS

** 

*Physical Constants, absolute zero=-273., universal gas=8.314

** STEP: Step-1

** 

Creep strain vs time graph as input in abaqus

I have a creep strain vs
time graph. How can that be used as input for creep? In defining creep,
abaqus asks for power law multiplier, eq stress order and time order?
how can those be found from creep strain vs time graph?

UMAT and UEXPAN subroutines

Choose a channel featured in the header of iMechanica: 

I am having problems in writing the umat and uexpan subroutines applicable to the creep model defined in 

http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000375

 

Has anybody written the algorithm? 

PhD student position at Arizona State University

One PhD student position is available at Arizona State University for fall 2014. Research background in at least one of the following areas is preferred.

1. Fatigue, creep, and corrosion analysis of materials

2. Computational mechanics and micromechanics

3. Damage detection for composite materials

Interested candidates please send application documents to yongming.liu@asu.edu

Thanks!

Grants for 3rd International Workshop on Physics Based Material Models and Experimental Observations Cesme/Turkey 2-4 June

In 2012 and 2013 we organized very successful Workshops on
"Physics-based material models and experimental observations" funded
by the European Union's Enlargement programme. We cordially invite you to
submit an abstract to the 3rd International Workshop on Physics Based
Material Models and Experimental Observations
to be held on 2-4 June
2014 in Cesme-Izmir/Turkey.

Gi-Dong Sim's picture

High-temperature tensile behavior of freestanding Au thin films

In this paper, the mechanical behavior of freestanding thin sputter-deposited films of Au is studied at temperatures up to 340°C using tensile testing. Films tested at elevated temperatures exhibit a significant decrease in flow stress and stiffness. Furthermore the flow stress decreases with decreasing film thickness, contravening the usual notion that “smaller is stronger”. This behavior is attributed mainly to diffusion-facilitated grain boundary sliding.

This paper has been accepted by Scripta Materialia.

Modelling time dependent concrete properties in ABAQUS

I am
carrying out a non-linear analysis of a concrete section subjected to construction
loading. I am looking to model the time-dependent effects of the material
properties as well as creep and shrinkage properties of concrete. In the ABAQUS
manual it states the General Static procedure
cannot be used to model time dependent effects. Naturally the Riks Method would be ideal to account of
the non-linear effects however it doesn’t allow for the use of multiple steps in
the analysis which is necessary to model the various stages of construction

Amit Pandey's picture

Developmental Thermal Barrier Coating Bond Coats

Thermomechanical Behavior of Developmental Thermal Barrier Coating Bond Coats

Authors: Amit Pandey 1, 2, Vladimir K. Tolpygo 3,  Kevin J. Hemker 1

1. The Johns Hopkins University, Department of Mechanical Engineering

2. Oak Ridge National Laboratory, Materials Science and Technology Division

Nonlinear Dynamics - 2013. Registration deadline extended till January 28th

Dear Colleagues,


The new deadline for abstract (plain text, 400 word limit) submission is now January 28, 2013.

 

The 4th conference "Nonlinear Dynamics -2013" will be held from 19 until 22 June, 2013 in Sevastopol (Ukraine).

Conference web-site: https://sites.google.com/site/ndkhpi2013/home

  

The conference is organised by:

Welcome to the Mini-symposium "Creep and Thermo-Mechanical Fatigue" (July 23-26, 2013, Montreal, Canada)

Dear Colleagues,
We are pleased to invite you at mini-symposium Creep and Thermo-Mechanical Fatigue within
the 4th Canadian Conference on Nonlinear Solid Mechanics at McGill University (July 23-26,
2013, Montréal, Canada).

The mini-symposium web-page is: http://cancnsm2013.mcgill.ca/ms26.html

We welcome abstract submissions on the following topics:

4th International Conference "Nonlinear Dynamics - 2013" , Sevastopol, Ukraine, 19-22 June, 2013

Dear Colleagues,

The Organizing Committee of the 4th conference ND-2013 is pleased to invite you to participate at the Nonlinear Dynamics Conference to be held from 19 until 22 June, 2013 in Sevastopol (UKRAINE).

Conference web-site: https://sites.google.com/site/ndkhpi2013/home

 

The conference is organised by:

Difference between Creep rate and creep strain rate

Free Tags: 

Hi all,

 

Do you know what is the difference between Creep rate and creep strain rate?

 

Thanks beforehand...

 

creep subroutine ABAQUS

Free Tags: 

Dear all

I'm trying to write ABAQUS subroutine for creep.

 I read ABAQUS help and documents about
this subroutine but it explained briefly about editing subroutine. In addition,
it said nothing about how to link it to software.

how to model user defined creep in ANSYS?

Hi,
Is there a place I can find explained examples or tutorials on how to model user defined creep in ANSYS?

 

I need to follow the creep law __>      effective creep strain (e at time t) = S. T. e^(-H)

 

S=(a0)^t.(sigma)^(a1) ;     T = t^(a2)+(a3).t^(a4)+(a5)t^(a6)   ; H = (a7)/[(theta)+273.16]

a0 to a7 are material constants.

I have the experimental data and tried to fit the curve in Ansys to obtain the material constants. 

I tried to follow the ansys help file steps. But facing erros messages.

Need help in Creep modeling in ANSYS

Can Anyone help me how to do creep modeling in ansys? 

 

I need to follow the creep law __>      effective creep strain (e at time t) = S. T. e^(-H)

 

S=(a0)^t.(sigma)^(a1) ;     T = t^(a2)+(a3).t^(a4)+(a5)t^(a6)   ; H = (a7)/[(theta)+273.16]

a0 to a7 are material constants.

I have the experimental data and tried to fit the curve in Ansys to obtain the material constants. 

I tried to follow the ansys help file steps. But facing erros messages.

If any one could give me a sample apdl code it would be helpful.

Postdoctoral Research Assistant in Modelling Creep Damage

At Oxford University we are seeking to appoint a post doctoral Research Assistant to work on the modelling of cavity nucleation and growth in the heat affected zone of a welded component operating in the creep regime. A detailed advertisement and further particulars about the post can be found in the attached files.

Further Information can be obtained from Prof Alan Cocks - alan.cocks@eng.ox.ac.uk

Zhiqiang Wang's picture

Postdoc position available in Compuational Materials Modeling

The Department of Materials Science and Engineering in the College of Engineering at the University of North Texas (UNT) seeks highly qualified applicants for a postdoctoral researcher position in computational materials modeling. The successful candidate will work on multiscale modeling of defects and microstructures (e.g., dislocations, grain boundaries, etc), and damage and failure of materials to design and evaluate advanced superalloys for aerospace applications, as part of the federally-funded research program in the Institute for Science and Engineering Simulation (ISES).

orthotropic nonlinear viscoelasticity/creep in Ansys

Hi,

 I would like to know if there is any chance to simulate orthotropic nonlinear viscoelasticity/creep of CFRP in ANSYS (e.g. by means of user programmable features (UMAT subroutines) or using the software DIGIMAT or others)? For the nonlinear part I would like to use Schapery's method.

 Many thanks for yor help!

-André

anilshirahatti's picture

Creep Analysis in Abaqus

Hi all,

I want to FEA of normal tensile creep test using Abaqus. Can anyone suggest me some notes/books/literature.

Thanks

Anil

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