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H Jerry Qi's picture

Journal Club Theme of April 2014: Challenges and Opportunities in 3D Printing: A Mini Introduction

3D printing, or Additive Manufacturing (AM), has drawn significant attention from both general public and research community in recent years.  Although the first prototype of 3D printing (called rapid prototyping) emerged about three decades ago and has gone through significant development, the recent explosion in its popularity appears to be mainly due to intensive media reports. However, I personally feel what is truly underneath this increasing popularity is the development of 3D printing has reached a critical point where the revolutionary transition of 3D printing from a prototyping tool (which is cool but few people take it seriously) to a high fidelity manufacturing powerhouse is occurring, which will dramatically change how materials, parts, or devices are made in the future. As will be outlined below, 3D printing is a very broad concept and there are many dramatically different 3D printing technologies. In addition, 3D printing research is part of the large manufacturing research community, which consists of many extremely innovative people. Therefore, I will briefly introduce the different 3D printing technologies then comment on the challenges and potential opportunities, which I am sure will be incomplete. I hope this can lead to more in-depth discussions.


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Composite simulation

Dear All

 How can I simulate a composite plate with different thickness in ABAQUS?


which material can be used for modelling a microstucture of metal foams in Abaqus?

I simulate a metal foam microstructure in abaqus but now in material property I dont know which kind of material can I use?

For example I used elasticity and plastic(crushable foam) or elasticity and plastic(isotropic hardening) ?

 


Yonggang Huang's picture

Journal of Applied Mechanics (ASME Transactions) now publishes very fast.

Journal of Applied Mechanics (JAM) received 526 submitted manuscripts in 2013.  Among them 4 are still in review.  

The average time for the 1st round of review, with the decision to accept, or reject, or revise, is 18 days.  After the 1st round of review, the average time to make the final decision is 34 days, which include both the authors' revision time and 2nd (and more) round(s) of review.

After acceptane the uneditted manuscript appears online within 48 hours.


SIMULIA's picture

YOUR OPINION MATTERS!

Take our user satisaction survey and tell us what you think!

http://bit.ly/SIMSAT


Why the VVF of GTN model within Abaqus keeps 0

I calculated an example of unaxial tension using GTN model offered by Abaqus. I followed all the instructions found in CAE User's and Analysis User's manual in Abaqus documentation. No error or warning was issued but the result seemed ridiculous, since VVF, VVFG and VVFN keeped 0 throughout the process while equivalent plastic strain keeped increasing(which showed the material had come into plastic deformation). I don't know what went wrong, looking forward to you reply.


'Structural safety evaluation of Karun III Dam and calibration of its finite element model' - article freely available

'Structural safety evaluation of Karun III Dam and calibration of its finite element model using instrumentation and site observation' by H. Mirzabozorga, M.A. Hariri-Ardebilib, M. Heshmatia, S.M. Seyed-Kolbadia

This article published in Case Studies in Structural Engineering is freely available on ScienceDirect 

Highlights:


Orthotropic material and cylindrical coordinate in ABAQUS using the XFEM method

Hello,

I am modelling fracture in timber using the XFEM method in ABAQUS. I started with a model where I gave isotropic properties to the timber and it is working. Now I would like to have orthotropic properties for the material and use a cylincrical coordinate system. Unfortunately when I change the material properties the model does not work anymore. Do you any idea of why? Further when I choose orthotropic or engineering constant in the module property for the material, the subscripts refer to the global coordinate system or to the one that I created for assigning the material orientation?

Thanks!!!

 


Ph.D. Studentships in Composite Materials-Chonbuk National University, Republic of Korea

We welcome applications for a PhD position in the field of experimental mechanics and composite materials. Further details in the attachment.


Ming-Jue Zhou's picture

Looking for a postdoctoral position

I will receive my PhD in July, 2014. Now I am looking for a
postdoctoral position in Solid Mechanics.  I have working
on Computational Mechanics for five years and my PhD research topic is
"Shape-Free Plane Hybrid Stress-Function Finite Element Method". Some
of my publications are listed here:


Postdoctoral researcher position opening at Pohang University of Science and Technology (POSTECH), Korea

We are seeking a highly qualified candidate for a full-time postdoctoral researcher position in the area of Computational Mechanics at the Graduate Institute of Ferrous Technology (GIFT), Pohang University of Science and Technology (POSTECH), Korea. Candidates with a strong background in continuum/dislocation-based plasticity theory, computational mechanics of sheet metals, FE modelling of sheet metal forming processes… are highly encouraged to apply.
 
Responsibilities:


mohsenzaeem's picture

An elastic phase field model for thermal oxidation of metals: Application to zirconia

http://www.sciencedirect.com/science/article/pii/S0927025614002031

Abstacrt: A multi-phase field model was developed for non-selective oxidation of metals which captures both the oxidation kinetics and stress generation. Phase field formulation involved a non-conserved phase field variable as the marker for the metallic substrate, oxide scale, and a fluid phase containing oxygen, and a conserved phase field variable representing the concentration of oxygen.


Maseng's picture

presenting a new method to model of metal foams

i have presented a new method for the first time to model of metal foams that subtracts stochastic cells from a desired volume and changes it to a foam.

i would like to know if there is any phd position for this?

thank u for your consideration :)


Lifeng Wang's picture

PhD Position Available in Multifunctional Composite Materials

One PhD position is available immediately in the Department of Mechanical Engineering at Stony Brook University, NY, US.  The research program focuses on the mechanics and multifunctional applications of 3D periodic composite materials including shape memory, acoustic/elastic wave propagation, and energy harvesting. The candidates with background in solid mechanics and finite element analysis are highly encouraged to apply. 


Virtual Physiological Human Conference 2014 (September 9-12, Trondheim, Norway)

Dear colleagues;
The Norwegian University of Science and Technology (NTNU) is hosting the VPH2014 conference September 9-12 in Trondheim, Norway. This biannual conference series has become one of the major instruments for maintaining the coherence and momentum of the highly multidisciplinary Virtual Physiological Human community. And as biomechanics is one of the main disciplinary pillars of the VPH mission, the conference provides an ideal intellectual setting for presenting and discussing your work as well as establishing new professional alliances with researchers within and outside the biomechanics field.


SIMULIA's picture

FREE eSeminar April 24th: Efficient Design #Optimization in Your CAE Environment

Sign up! FREE eSeminar April 24th: Efficient Design in Your Environment


Fangsen Cui's picture

Research Scientist at Institute of High Performance Computing, A*STAR

The position is still open for apply.

You will perform research and development work using active/passive vibration control measures to reduce vibration of typical offshore structures. You will also develop new
numerical models, new control algorithm, and optimize the locations of actuator/sensors.  

Requirements:

·               A PhD in Mechanical/Civil Engineering

·               Strong background in vibration control using active/passove method such as CLD techniques, structural health monitoring, nonlinear dynamics.


Curve Fitting for Viscoplastic (Anand) Model in ANSYS

Hello everyone, 

            I would like to know if it is possible to use TBFT option in ANSYS to curve-fit Anand's model parameters using experimental force-displacement data.

     I am aware that the ANSYS manual  has description for hyperelastic and even chaboche model, but is there an established procedure to obtain Anand model parameters using experimental curve fitting ? 

 

Thank you. 


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