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Convergence problem in 2-d axisymmetric elasto-plastic formulation

Submitted by rajdrdl on
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Dear all,

I am trying to solve the thermal ratcheting of a hollow cylinder using elasto-plastic formulation.

I am applying the moving thermal gradient in axial direction. Our FEM code(Newton Raphson) is converging for first increment but after that it is diverging. I have used 8 noded serendipity element with 9 gauss point.

Anyone  can please help me that why it is happening?

Thanks

Raj

Rayleigh damping: how to match the model frequences to the frequences of the measurements?

Submitted by Mike W. Long on
damping mechanical elastic body measurements modal analysis

 I hope that the mecanicians can help me to solve my problem.

 Is there any possibility to match the frequences of the physical model to the mesurement data?

Modal Analysis in Ansys to get natural frequencies and compare them with theory results

Submitted by pietro maisto on
software
Modal Analysis
Cantilever Beam Vibration Modeshapes Natural Frequencies

Hi, I'm Pietro, a short term Italian incoming student at VT (virginia tech).

My advisor, in order to start my thesis there about skin friction coefficients in a scramjet combustion chamber, gave me a Modal analysis to do on a gage described as follow:

a cantilever beam  (1mm diameter and 3cm long cylindrical shape) with 1mm depth and 1cm diameter cylindrical flat "hat" attached upon.

Base constraints: zero displacements, zero rotation

Assistant professor positions (Lecturer) x2 Cardiff University

Submitted by Stephane Bordas on
job
lecturer; assistant professor; mechanics; computational; numerics;

Two positions are currently opened in Cardiff: http://www.cardiff.ac.uk/jobs/engin/lecturer-in-civil-engineering-2-pos…

 I strongly encourage imechanicians to apply.

 Best wishes,

Stephane

New IOSO video tutorial (with SolidWorks, Icem, CFX)

Submitted by IOSOnier on
software
Video
tutorial
Optimization
CFX
IOSO
SolidWorsk
Icem CFD

Dear Colleagues,

a new 30 min IOSO video tutorial is available for you on-line: http://vimeo.com/13029874 Step by step Optimization task solution with the aides of DS SolidWorks (parametrizator), ANSYS Icem CFD (mesh processor), ANSYS CFX (CFD software) coupled with IOSO 

How to perform sequential thermo mechanical analysis using FEAP

Submitted by Vivian.Tini on
FEAP

Dear members,

I am a newbie in FEAP and I would like to perform transient heat transfer analysis followed by a series of static analysis using FEAP.  Where does FEAP save the temperature history from the transient analysis and how to use this as input for the static analysis? I am using user constitutive model and most of the material parameters are temperature dependent. Which file do I need to include?

Best regads,

Vivian Tini

 

Xiaodong Li is a new Editor of the iMechanica Journal Club

Submitted by Anonymous (not verified) on
mechanician

Xiaodong Li, of the University of South Carolina, has graciously agreed to be a new Editor of the iMechanica Journal Club.  iMechanica has now over 20,000 registered users.  Xiaodong is one of the earliest active users (user number 48), and has played a large role in shaping the development of iMechanica.  He has been advocating for strong participation from experimentalists, and for highlighting significant applications of mechanics.

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