research

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.


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. 


AminBakhtiari's picture

HELP!

 Hi my friends!

I hope everythin's ok! 

As I previously said I'm doing some researches about fully developed turbulent flow inside an annuli.Now I've faced some problems. Does anyone know how can I calculate Darcy friction factor for a fully developed turbulent regime inside an annuli not using colebrook equations and moody diagram? is there any other way?

I'd be really thankful if anyone could help me .

amin3m6666@gmail.com


PhD Scholarship in Geotechnical Engineering Postgraduate Research of the University of Adelaide

One research scholarship is immediately available to support a PhD
student to work on a project in Geotechnical Engineering area.  The project is funded by the Australian
Research Council (ARC) and lasts 3 years. 
The scholarship will provide a stipend of A$ 25,392 per annum (in
2014).  Tuition waiver will be
nominated.  Exceptional candidate is
eligible to be awarded an extra amount of allowance in appreciation of his (or
her) possible high quality research outcomes. 


bin.chen's picture

New view of DNA

Recently, the classical view of DNA as an isotropic elastic rod has been questioned. Here we model DNA as an elastic rod inlaid with fibrils, based on which we have made prediction that is in consistency with experiments. Our analysis suggests that the bending of short DNAs can be facilitated if there exists a specific structural heterogeneity.

http://appliedmechanics.asmedigitalcollection.asme.org/article.aspx?articleid=1841526


Is anyone familiar with deriving shape functions for different beam end conditions?

I am doing my research in nonlinear vibration of beams. In that research, I have to derive the shape function for different end conditions of the beam. Regarding this,I need some ideas. Are there books I can reference?

Thank you for your help.


ABAQUS fatigue and fracture

I am trying to find the rate of crack growth in steel beam under fatigue loading using ABAQUS... i am having trouble with the loading part.... How to provide cyclic loads in ABAQUS...and obtain the increment in crack length with time??? Please help


Nastran SuperElement

I would like to use condensation to calculate the normal modes of
a structure. These grids are connected to the structure through RBE3 (master
grid). Let me know if there's a way to use the master grids of RBE3 elements in
the A-SET?

the error form the f06  

*** USER FATAL MESSAGE 2101 (GP4)


baijatnal's picture

Optimization techniques to simulate clamped cornered plates and pinned nodes using ABAQUS?

Can any help me know about how to optimize using ABAQUS? 

 

I am working on mode localization of composite plate, kindly help 


"How I published in a scientific journal at age 12"

Suganth Kannan writes writes about the inspiration behind his model for earthquake prediction – and what he learned on his (“tedious but worth it”) journey to publication

---

Ping!

I heard a sound in my email Inbox. It was from the editor-in-chief of Elsevier's Engineering Failure Analysis journal. I opened the email and read that my paper was accepted to be published under some conditions for revisions per peer reviewer's comments.


How can i simulate failure and damage progressive in composite materilas using abaqus

I am new in using abaqus, please can any one help me with tutorials, book or anything that guide me on how to simulate failure and damage progressive in composite materials using abaqus.

Thanks you all 


Yeoh Model Parameter

Greetings,

I'm conducting a simple shear test (single lap joint) between aluminum bonded with 3M adhesive. 

Adhesive material is 3M VHB 4930 adhesive (acrylic)

Result obtains = 

Load vs Displacement Curve

True Stress vs Stretch Ratio

From the literature, mostly they used Yeoh model for 3M adhesive (Modeling and simulation of dielectric elastomer actuators,M.Wissler 2005).


katia bertoldi's picture

Extremely deformable structures. CISM 2014 Advanced School: Udine, Italy, June 2 - 6 2014

An exciting  short course on "Extremely deformable structures" will take place  at the
International Centre for Mechanical Sciences (CISM)  in Udine (Italy) from June 2nd to June 6th.


jaouad's picture

homogenization on abaqus

hi,
I'm looking for how we can do homogenization on ABAQUS.
thank you in advance.

salut,
Je cherche comment nous pouvons faire homogénéisation sur ABAQUS.
merci à l'avance.


DMIG (superelement)

i would like to condense the model (superelement) using Nastran (PARAM, EXTOUT, DMIGPCH). 

but, i'm having few CONM2/CELAS1/CBEAM elements at condensation locations. i would like to know these (CONM2/CELAS1/CBEAM) elements will create any issue while condensation 


The ICE's journal Engineering and Computational Mechanics is planning a themed issue on Direct Methods.

The ICE's journal Engineering and Computational Mechanics is planning a themed issue on Direct Methods. If you would like to learn more, please follow the link below:


buckling analysis of pipeline under external pressure

The buckling pressure of a uniform pipe under external pressure, can be evaluted by the linear analtical equation:

 

linear buckling pressure equation 

 I use abaqus to simulate this problem. I tried for different pipe length and boundray conditions, the buckling pressure varies a lot, and even larger than the linear analytical results. Does anyone know how long do I need to build for the model and how to set up the boundray conditions. Many thanks. 

 

pipe length and boundray condition 

 

 


John E. Dolbow's picture

Finalists for the 2014 Melosh Competition

Seven finalists have been identified for the 2014 Melosh Competition to be held Friday, April 25, at Duke University.  The finalists and their current institutions are:

Amin Aghaei, Carnegie Mellon University

Sourish Chakravarty, SUNY Buffalo

Gina El Jannoun, MINES ParisTech

Mhadi Moghadam, UCSD

Phani Motamarri, University of Michigan

Nathan Roberts, University of Texas

Timothy Truster, University of Tennessee

Please join me in congratulating the finalists!!! 


Abaqus composite material shell interlaminar stress recovery

How do I recover the interlaminar stress/stresses 13, 23, or xz, yz for a composite laminate when using shell elements in Abaqus?

What type of elements should I use?

 


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