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Crack Propagation in Bamboo's Hierarchical Cellular Structure

Bamboo, as a natural hierarchical cellular material, exhibits remarkable mechanical properties including excellent flexibility and fracture toughness. As far as bamboo as a functionally graded bio-composite is concerned, the interactions of different constituents (bamboo fibers; parenchyma cells; and vessels.) alongside their corresponding interfacial areas with a developed crack should be of high significance.

Henry Tan's picture

Future energy needs and engineering reality

Professor Michael Kelly FRS FREng, Prince Philip Professor of Technology, University of Cambridge, gave the Closing Plenary at the 2nd International Symposium on Energy Challenges and Mechanics, hosted by the North Sea Conference and Journal.

Michael wrote the speech into an article, “Future energy needs and engineering reality”. The paper was published in the Journal of Energy Challenges and Mechanics.
http://www.nscj.co.uk/JECM/JECM1-3.html

Oscar Lopez-Pamies's picture

PACAM XV

The XV Pan-American Congress of Applied Mechanics (PACAM) will be held at the University of Illinois Urbana-Champaign on May 18-21, 2015. The conference will feature 4 prestigious plenary lectures, several keynote presentations, and mini-symposia in all areas of mechanics, including Atomistics, Defects in Solids, Nanocomposites, Plasticity, Electro- and Magneto-active Materials, Fracture, Instabilities in Solids and Structures, and Fluid Mechanics.

IMPORTANT DATES & DEADLINES

Fatigue loads defination in abaqus

Dear Sir/Madam,

My name is Muhammad Imran and I am working on experimental fatigue life calculation of aluminium-silicon alloy and validation of experimental results with abaqus fatigue results. The fatigue simulation is totally new topic for me and I don't have any idea how to apply fatigue loads in abaqus. 

During fatigue experiments, 100MPa (constant amplitude, sinusoidal) stress is applied at 20Hz frequency which led to specimen failure after 268220 cycles. I want to input these parameters in abaqus.

FSW in ANSYS

Hello ANSYS masters, I am student of M.Tech and I am currently doing my dissertation on Friction stir welding stimulation using ANSYS Mechnical APDL. The problem I face is in defining the time substep in the load step defined as follows

!Load Step2
time,6.5              
d,1,rotz,nr1             !Rotation of tool, 60rpm
deltim,0.01,0.001,0.2    
outres,all,10
allsel
solve

2nd International Symposium on Transportation Soil Engineering in Cold Regions

2nd International Symposium on Transportation  Soil  Engineering  in  Cold Regions. For more information, check the attached pdf file. Thank you very much.

Oscar Lopez-Pamies's picture

PACAM XV

The XV Pan-American Congress of Applied Mechanics (PACAM) will be held at the University of Illinois Urbana-Champaign on May 18-21, 2015. The conference will feature 4 prestigious plenary lectures, several keynote presentations, and mini-symposia in all areas of mechanics, including Atomistics, Defects in Solids, Nanocomposites, Plasticity, Electro- and Magneto-active Materials, Fracture, Instabilities in Solids and Structures, and Fluid Mechanics.

IMPORTANT DATES & DEADLINES

jacobian matrix caculation

Dear friends

Hi. I'm working on multiscale modeling of soft tissues. In my research I faced with a problem about computing the jacobian matrix in ABAQUS UMAT. In my model the material properties are function of external parameter like ef (ef is kind of strain and obtained from loading conditions) and  relation between the "ef" and the strin in the model in unkown. Now, i want to calculate the jacubian matrix for this material, as you konw, the jacobian is defined as delta_sigma/delta_epsilon.

I have two question;

Laura De Lorenzis's picture

Research Position at the Institute of Applied Mechanics, TU Braunschweig

We offer a research position in the area of Computational Mechanics with a focus on isogeometric analysis and collocation methods applied to multiscale material modeling, beginning January 1st, 2015. The position is full-time fixed-term for 3 years.

Cohesive Zone modelling

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.   

Postdoc (m/f) on fracture toughness of high performance composite materials

Your tasks: The main objective of this position is to improve the fracture toughness of high performance composite materials. You are expected to plan and implement manufacturing and processing experiments with carbon fibre thermoset prepregs and characterise their fracture properties. Furthermore, you will plan respective processing equipment and thoroughly investigate fracture mechanics of composites. This also includes the development of according numerical analyses and simulations.

Roozbeh's picture

A Ph.D. Position in Mechanics of Nano-composites at Michigan State University

Our Group of Appleid mechanics in Enviormental & Civil Engineering Department at Michigan State University has an openings for PhD positions to work on  Mechanics of Nano-composites  starting Spring 2015.

One research direction is modeling of nano reinforced materials, with combined theoretical and experimental efforts. Highly Stretchable/Flexible composites combines the leight weight of classical composites and mechanical properties of a polymer based composites, and thus do have a very broad biological applications. . 

Looking for a postdoc position in computational mechanics

 

I am looking for a postdoc position in the field of compuational mechanics. My phd thesis is titled " numerical modling of hydralic fracturing is pre-fractured porous media by using the extended finite element method. I have been working on developing finite element based codes in Fortran coding language during my M.S. and PhD.

I am very interested to continue my research as a postdocerial researcher in numerical simulations, especially in porous media, fracture mechanics, fatigue and plasticity, or related issues.

Looking for a postdoc position in computational mechanics

 

I am looking for a postdoc position in the field of compuational mechanics. My phd thesis is titled " numerical modling of hydralic fracturing is pre-fractured porous media by using the extended finite element method. I have been working on developing finite element based codes in Fortran coding language during my M.S. and PhD.

I am very interested to continue my research as a postdocerial researcher in numerical simulations, especially in porous media, fracture mechanics, fatigue and plasticity, or related issues.

ANSYS LS-DYNA (Explicit-to-Implicit (ETI) Sequential Solutions)

I am doing FE simulation on spring back of seet metal forming operation

someone help/suggest  me to do   (Explicit-to-Implicit (ETI) Sequential Solutions

 

 

Looking for a post doctoral position

Hi! I am looking for a postdoctoral position of the following interests:

1. Structural design, analysis and optimization;

2. Mechanics, Heat transfer, Acoustics or Electromagnetics;

3. Numerical Methods (FEM, BEM).

I would be very thankful that if you are going to have a position and

take a minute to contact me at: jingguoxian@gmail.com

 

S. Thuillier's picture

Esaform 2015 & Integrated design

We organize at the next Esaform conference, that will take place in April 2015 in Austria (http://www.esaform2015.at), a symposium on « Integrated design, modeling and reliability assessment in forming » or I-DMR (MS19).  The idea of this symposium is to optimize plastically formed parts obtained from a multi-step strategy, focusing on the technological processes' efficiency as well as the structural performance of the final components.

software comparison (abaqus, ansys, flac, udec)

hi everyone, right now I am writing my reserach proposal and met some question really need your help. thank you in advance!

Mechanical Engineer – (Borehole Abandonment Tools)

Mechanical Engineer – (Borehole Abandonment Tools)

Location: Houston - United States

 

Job Description:

Amir Abdollahi's picture

A computational study of flexoelectricity

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.

Mechanical Engineer – (Borehole Enlargement)

Mechanical Engineer – (Borehole Enlargement)Location: Houston - United States 

Job description:

VUMAT Subroutines for multi-phase material behavior.

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.

ndaphalapurkar's picture

Postdoc position – In vivo biomechanics of brain

Seeking a postdoctoral fellow to research on "In vivo  biomechanics of brain" using magnetic resonance imaging, tagging techniques and image processing techniques. 

See attached flyer and instructions to apply.

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