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Nonlinear geometric effects in mechanical bistable morphing structures

Submitted by zichen on

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

electro-mechanical properties of the 3M VHB electro-active polymer tape

Submitted by v.tagarielli on

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

blast in deep water

Submitted by v.tagarielli on

 

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

Full time position with ANSYS Inc (Houston, TX)

Submitted by pepi on

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.

Building and Environment Best Paper Awards - winners announced

Submitted by Laure Ballu on

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,

Phase-field modeling of crack propagation in piezoelectric and ferroelectric materials

Submitted by Amir Abdollahi on

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: