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Cohesive Zone modelling

Submitted by phanikumar376 on

Dear all,

           I am trying to study the fracture at bonded interfaces using cohesive zone model in Abaqus. I am going through the abaqus manual but it was not clear how to insert the chosive elements in the model. How to model these chosive elements. Can anyone help in modelling the chosive elements.   

A computational study of flexoelectricity

Submitted by Amir Abdollahi on

Flexoelectricity is a size-dependent electromechanical mechanism coupling polarization and strain gradient. It exists in a wide variety of materials, and is most noticeable for nanoscale objects, where strain gradients are higher. Simulations are important to understand flexoelectricity because experiments at very small scales are difficult, and analytical solutions are scarce. Here, we computationally evaluate the role of flexoelectricity in the electromechanical response of linear dielectric solids in two-dimensions.

VUMAT Subroutines for multi-phase material behavior.

Submitted by simumano on

Hi everyone. I would like to know how to get started with a VUMAT subroutine for multiphases for example a subroutine for pore water and sand. It could be helpful when anyone could share VUMAT subroutines for learning such complex programmings. Could be appreciated when some one teaches with equations. thank you.

coupled temp-displacement analysis ABAQUS CAE: predefined field problem

Submitted by manolo on
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Hi I'm new in abaqus, I'm trying to make a coupled temp-displacement analysis with abaqus, but I cant fix an initial velocity in the predefined field in the inital step (I mean I can, but it doesn't work during the calculations), I already did the same thing with dynamic implicit analysis and it worked good

Extremely Curved Cracks

Submitted by Ettore Barbieri on

 

The word "extreme" seems to be "trending" a lot these days, see the recent discussions on the new journal Extreme Mechanics Letters.

My collaborator Ruben Sevilla at Swansea and I were interested in very curved crack paths that develop in nature and have been replicated experimentally in thin films attached to elastic substrates.

Journal Club Theme of September 2014: Numerical modeling of thermo-hydro-mechanical coupling processes in porous media

Submitted by WaiChing Sun on

Thermo-hydro-mechanics (THM) is a branch of mechanics aimed to predict how deformable porous media behave, while heat transfer and fluid transport simultaneously occur in the pores filled by liquid and/or gas. Understanding these multi-physical responses is important for a wide spectrum of modern engineering applications, such as tissue scaffolding, geothermal heating, mineral exploration and mining, hydraulic fracture, energy piles, tunneling with frozen soil and nuclear waste storage and management.

Determination of the elastic properties of rabbit vocal fold tissue using uniaxial tensile testing and a tailored finite element model

Submitted by Neda Latifi on

http://authors.elsevier.com/a/1PcEa6EHNeGWdB

Highlights:

Uniaxial tensile testing of rabbit vocal fold tissue.
Investigating the role of specimen shape on tensile testing of vocal fold tissue.
Development of a shape-specific finite element model to estimate elastic modulus.
Comparison of elastic moduli from shape-specific and generic-shape models.

Rapid review and publication at JAM in 2014

Submitted by Yonggang Huang on

Journal of Applied Mechanics (JAM) received 280 submitted manuscripts during the first 6 months in 2014.  Among them only 4 are still in review.  

The average time for the 1st round of review, with the decision to accept, or reject, or revise, is reduced to 10 days.  For those that need revisions, the average time to make the final decision is 24 days after the 1st round of review, which include both the authors' revision time and 2nd (and more) round(s) of review.

new paper on fracking in JAM by Prof. Bazant

Submitted by Yonggang Huang on

Fracking has been an important research topic in recent years.  JAM just published a paper "Why Fracking Works" by Professor Zdenek Bazant and his co-authors (JAM, volume 81, paper 101010, 2014).  This paper is of great interest, not only to mechanics, but also to engineers interested in fracking.

The paper is attached.

JMPS paper-Micro-buckling in the nanocomposite structure of biological materials

Submitted by heshijie on
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Nanocomposite structure, consisting of hard mineral and soft protein, is the elementary building block of biological materials, where the mineral crystals are arranged in a staggered manner in protein matrix. This special alignment of mineral is supposed to be crucial to the structural stability of the biological materials under compressive load, but the underlying mechanism is not yet clear.