iMechanica

Hi,

In my research i am trying to develop a new model for plastic deformation, and i suspect there is a strong similarity between

plasticity and turbulent flow !.

My question is: if there is workd done trying to apply Reynolds decomposition (Reynolds Stress) to the governing equations and solved plasticity problem in Solids?

thanks,

Yaron B.S.

Bistable structures, exemplified
by the Venus flytrap and slap bracelets, can switch between different
functional shapes upon actuation, and have important applications in
mechanical/electro-mechanical devices ranging from bio-inspired robots to
deployable aeroplane wings. Despite numerous efforts in modeling such large
deformation of shell structures, the roles of mechanical and nonlinear geometric
effects on bistability remains elusive. Closely related, emerging challenges
include modeling the spontaneous curving and buckling of thin objects such as

see the video 
M. Rahimi and M. Arroyo, Phys. Rev. E 2012

Dear modellers

do you work with electrostrictive polymer actuators and need their properties for your simulations? If so, you will find the paper below interesting: we have tested the most popular material for EAP applications.

Tagarielli, Hilldick-Smith and Huber, 2012, Electro-Mechanical Properties and Electrostriction Response of a Rubbery Polymer for EAP Applications, IJSS
http://www.sciencedirect.com/science/article/pii/S0020768312003198

enjoy!

V

Dear all,
I am proud to present to i-mechanicians some recent work by my student Andreas Schiffer. We provide a new experimental technique and detailed analytical models to explore one-dimensional underwater blast problems in deep water.
  
Schiffer et al, 2012, The Response of Rigid Plates to Deep Water Blast: Analytical Models and Finite Element Predictions, J. App. Mech

http://dx.doi.org/10.1115/1.4006458

ANSYS, Inc. has an immediate job opening in Houston, TX for a Technical Services Engineer.  This is a full time position.

The job entails providing advanced technical guidance on various aspects of computational Structural Mechanics to clients in industry and academia.

The 2012 Best Paper Awards from Building and Environment go to:
• R. Ramponi, B. Blocken,
“CFD simulation of cross-ventilation for a generic isolated building: Impact of computational parameters”
• S. Yin, G.N. Sze-To, Christopher Y.H. Chao,
“Retrospective analysis of multi-drug resistant tuberculosis outbreak during a flight using computational fluid dynamics and infection risk assessment”
• Chun Chen, Bin Zhao, Wanting Zhou, Xinyi Jiang, Zhongchao Tan,

Appl. Phys. Lett. 101, 063901 (2012); http://dx.doi.org/10.1063/1.4742933 (5 pages)

see the video(1) (tether from a planar disk) 

see the video (2) (tether from a vesicle) 

The dynamical features of tether growth has been studied. The color map shows the difference of the monolayer velocities. 

 M. Rahimi and M. Arroyo, Phys. Rev. E 2012

This is an accepted manuscript in Journal of the Mechanics and Physics of Solids

Title: Phase-field modeling of crack propagation in piezoelectric and ferroelectric materials with different electromechanical crack conditions

Authors: Amir Abdollahi and Irene Arias, Universitat Politecnica de Catalunya (UPC), Barcelona

Abstract:

The “Michigan Nano Computational Cluster” (MNC2) consists of 14 nodes.
Each compute node contains a hexa-core Intel Xeon X5660 processor
running at 2.66 GHz, 24 GB of memory. MNC2 contains 168 processing cores
linked with Gigabit ethernet, 12 TB of disk space.

 MNC2 currently hosts simulation tools for micro/nanoscale systems
including codes for first principles calculation, photonic devices,
molecular dynamics, multiphysics, and multiscale modeling.

The Cluster is free for use. Researchers interested in using the cluster,

Dear colleagues,

two PhD positions have become available at the Mechanics of Materials group, Eindhoven University of Technology, The Netherlands (http://mate.tue.nl/mate/)

This is the preprint of an article that will appear in Acta Materialia (10.1016/j.actamat.2012.07.050).

Influence of Strain on Space Charge Distribution at Ferroelectric Thin-Film Free Surfaces

by Lun Yang and Kaushik Dayal, Carnegie Mellon University

Abstract

Dear Colleague,

It is our pleasure to invite you to participate in the Third International Conference on Computational Contact Mechanics (ICCCM 2013), to be held in Lecce, Italy, on July 10-12, 2013.

The provisional agenda for the International CAE Conference has been released - featuring great papers from GE, Indesit, JLR, Volvo...and many more! See the agenda and register to attend the Conference in Italy!
 

papers about complex/branched cracks that I have got all belong to the area of the linear elastic fracture mechanics.

The event takes place August 13-17, 2012, Las Cruces NM.

'Composite Conference 2012 is focused on composite pressurized structures and vessels, and brings together the international composite community to discuss significant advances in the composite performance, durability, and safety.'

See: http://www.compositeconference.com/technical-program

The NASGRO® ( www.nasgro.swri.org ) fracture mechanics and fatigue crack growth analysis software is distributed as part of the ESACRACK software for application to fracture control verification of structural hardware used on ESA projects. 

Hi,

I just posted a Matlab-GUI easy-to-use DIC and DVC simulator tool on our website (franck.engin.brown.edu) for download for anyone that works with DIC or DVC. The purpose of these simulators is to simulate deformation fields based on a user provided image (2D) or volume (3D), and evaluate the correlation results with the analytical solutions to provide quantitative feedback on the "goodness" of the provided images for DIC or DVC purposes.

Feel free to use them for research, teaching, etc. We welcome any suggestions for improvements, etc.

Dear iMechanica community,

I have posted a set of lecture notes on the analysis of heterogeneous materials under MICROMECHANICS.  The lecture notes include a collection of Fortran and MATLAB codes that accompany the computational exercises in Part II of the notes.

This is the preprint of an article that will appear in Smart Materials and Structures (SMS)

Title: Crack initiation patterns at electrode edges in multilayer ferroelectric actuators

Authors: Amir Abdollahi and Irene Arias, Universitat Politecnica de Catalunya (UPC), Barcelona

Abstract:

Dear Colleagues,

Following the last successful events in the past years, the next ESAFORM
Conference on Material Forming (ESAFORM 2013) will represent the 16th
edition of one of the most important and well-established international
research meetings on the material forming field. The conference will be held
at the University of Aveiro, Portugal, from 22 to 24 of April, 2013.