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Adjal's picture

Determination of stress intensity factor of FGM materials

It is important to note that the determination of Stress intensity Factors lead to major problem for researchers, some of them have proposed an analytical method based on linear fracture mechanic by using the theorem de Giffth and also Paris, other have proposed numerical method using finite elememt analysis codes such as Ansys or Abaqus, other researcher have used experimental method.
  However, these methods still need an improvement for given accurate results.
How to develop an analytical method and adopted to FGM structure.

ms.rouhi's picture

Composite Manufacturing Process Modeling Using Poromechanics

Modeling and simulation of manufacturing of advanced composite material is a must in today's industry as the use of advance composites is increasing dramatically. The aim is to reduce the number of trial and error by development of a simulation tool to model and predict the manufacturing fundamental phenomena happening simultaneously in different scales. Poromechanics is a multidisciplinary and multiphysics concept which can be used to achieve this goal.

R.Mehrabi's picture

Constitutive modeling of tension-torsion coupling and tension-compression asymmetry in NiTi shape memory alloys

A 3D constitutive model is proposed and verified with experimental data. Tension-torsion coupling effect and tension-compression asymmetry effect is investigate for tube shape memory alloy.

R.Mehrabi's picture

A thermodynamically-consistent microplane model for shape memory alloys

In this paper, a macroscopic model in a thermodynamically-consistent framework for shape memory alloys is proposed.

Baohong Chen's picture

Stretchable and Transparent Hydrogels as Soft Conductors for Dielectric Elastomer Actuators

       A soft ionic conductor can serve as an artificial nerve in an artificial muscle. A polyacrylamide hydrogel is synthesized containing a hygroscopic salt, lithium chloride. Two layers of the hydrogel are used as ionic conductors to sandwich a dielectric elastomer and fabricate a highly stretchable and transparent actuator. When the two layers of the hydrogels are subject to a voltage, the actuator reduces its thickness and expands. An areal strain of 134% is demonstrated.

Chris Yakacki's picture

Journal Club: Overcoming Challenges in Mechanically Actuating Liquid-Crystalline Elastomers

Smart materials are designed to have a controlled response to external stimuli. Shape-memory polymers (SMPs) are one of the most well known classes of mechanically active smart materials and have experienced an incredible amount of research attention over the last decade. They are able to recover programmed deformations when heated above a thermal transition; however, are generally considered a one-time event. Liquid-crystalline elastomers (LCEs) are another class of actively moving polymers; however, these materials can demonstrate reversible and repeatable shape memory without the need for “re-programming” after each actuation cycle.

Xiujun Fang's picture

Job position at GEM in Princeton, NJ

Global Engineering and Materials, Inc. (GEM) is looking for candidates to fill a position of Research Engineer. Please refer to the attached file for detailed information. Thanks!

post-doctoral position in the following areas: blood compatibility and design/development of blood contacting medical devices - University of Maryland

The Artificial Organs Laboratory at the Department of Surgery of the University of Maryland seeks highly motivated individuals for a post-doctoral research associate position in the following areas: blood compatibility and design/development of blood contacting medical devices. The lab is conducting applied cardiovascular research, engaged in research and development of blood-contacting artificial organs and biologic responses to these devices.

Professor of Mechanics

The Department of Mechanical and Process Engineering (www.mavt.ethz.ch) at the ETH Zurich invites applications for a full professorship in Mechanics.

WaiChing Sun's picture

Symposium on Geomaterials: Poromechanics and Failure at EMI International Conference, Hong Kong January 7-9,2015

Dear Colleagues, 

We are currently organizing a Symposium on Geomaterials: Poromechanics and Failure, for the upcoming EMI International Conference  "Mechanics for Civil Engineers Against Natural Hazards" in Hong Kong Polytechnic University, Hong Kong, from January 7th to 9th, 2015. 

We would like to invite submission for abstracts on modeling, characterization, and experimental studies on geomaterials for disaster prevention (landslides, earthquake) and for problems related to new energy applications (e.g. fracking, induced seismic events). 

jenda_z's picture

Modeling of Localized Inelastic Deformation 2014

Dear colleagues,

I would like to bring to your attention the advanced course on Modeling of localized inelastic deformation that will be taught by Milan Jirasek in Prague, Czech Republic on 15-19 September 2014. More detailed information on the course is posted at http://mech.fsv.cvut.cz/~milan/course2014.html. We are looking forward to seeing you in Prague!

Charles Augarde's picture

Postdoc position in computational geomechanics at Durham University

We have EPSRC funding for a 39 month project modelling seabed ploughing (for cable and pipeline installation) starting in October 2014. We are recruiting two postdocs one in computational geomechanics (based at Durham, details here, closing August 4th) and another in experimental geomechanics (based at Dundee, details here).

Pradeep Sharma's picture

Society of Engineering Science Call for Award Nominations

 

The Society of Engineering Science (SES) oversees several awards and honors to members and eminent scholars of the field. A total of five medals are offered on an annual basis as well as election to Fellow grade of the Society. The awards are: A.C. Eringen Medal, Engineering Science Medal, William Prager Medal, G.I. Taylor Medal and the SES Young Investigator Medal.

jiangyuli's picture

Ferroelectric Switching of Elastin

Please see our recent paper in PNAS if you are interested.

doi:10.1073/pnas.1402909111

http://www.pnas.org/content/early/2014/06/18/1402909111.abstract

Bo Li's picture

Electromechanical deformation of dielectric elastomer in two types of pre-stretch

A pre-stretched dielectric elastomer is capable of large deformation, when subject to voltage. This paper investigates the effect of two types of pre-stretch: by strain and by stress. The difference is compared and discussed using thermodynamics models. The significance of the pre-stretch in actuation is explained by examining the true stress in actuation. Under both pre-stretch strategies, during the actuation, the dielectric elastomer exhibits hysteresis loops due to snap-through but differs in shape and physical quantity.

Arash_Yavari's picture

Three interesting, recent books

Dear friends:

I’d like to bring to your attention three recently published books that I have read. The following are a few words about each book in the order that I read them.

1) “Vito Volterra” by A. Guerraggio and G. Paoloni
http://www.amazon.com/Vito-Volterra-Angelo-Guerraggio/dp/3642272622/ref=...

'Influence of factors unrelated to environmental quality on occupant satisfaction in LEED and non-LEED certified buildings'

The article from Building and Environment featured in this piece 'Influence of factors unrelated to environmental quality on occupant satisfaction in LEED and non-LEED certified buildings' by Stefano Schiavon and Sergio Altomonte, can be viewed freely until 31 August 2014 http://bit.ly/1pTxID8

Flavio Stochino's picture

What is the importance of strain rate on structural response under blast load?

What is the importance of strain rate on structural response under blast load?

This and other issues are discussed in the recent paper from Stochino F. and Carta G.:

“SDOF models for reinforced concrete beams under impulsive loads accounting for strain rate effects”, DOI: 10.1016/j.nucengdes.2014.05.022, Nuclear Engineering and Design 276, (2014), 74-86.

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