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Indentation simulation, Contact problem, ABAQUS CAE specialists , please help

Submitted by ABAqirl on

Dear All,

I have the following problem. I simulate an indentation in two steps. At first step the indenter penetrate to the material. At the second step it withdraws from it. The problem, at the second step force simply drops. What could be the reason? Incorrect boundary conditions, very soft behaviour of material??? Specialists, please help.

 

Best regards

ABAgirl

How to Combine Shell Element and Solid Element in ANSYS

Submitted by allspot on

Hello Everybody

I'm currently working on on the tubular weld of joint modeling using ANSYS

Problems that I faced was how to combine elements of the shell (for chord and brace) with solid elements (for weld) so that stress transfer can occur between two elements

one technique that I know is using MPC

is there any among you who has a tutorial about it ..?

please help.....

Stribeck Curve Analysis Using Tribometer

Submitted by NANOVEA on
When lubrication is applied to reduce the wear/friction of moving surfaces an increasing load can shift the lubrication from several regimes such as Boundary, Mixed and Hydrodynamic Lubrication. The fluid viscosity, the load that is carried by the two surfaces and the speed that the two surfaces move relative to each other combine to determine the thickness of the fluid film. It is this process that determines the lubrication regime. How the regimes react to friction is shown in what is called a Stribeck curve.

Call for Papers - “International Journal of Fundamental Physical Sciences (IJFPS)” - Next issue Sep. 2011

Submitted by Payam Soltani on

Dear Researchers, Scholars, 

We are very glad to inform you about publishing a new quarterly journal, in Multidisciplinary Sciences and Fundamental Physical Sciences as, 

International Journal of Fundamental Physical Sciences (IJFPS)”

New ICE Journal: Géotechnique Letters

Submitted by Jean-Michel Pereira on

A new journal published by the Institution of Civil Engineers (UK) is available: Géotechnique Letters.

Average time to first peer review decision: 32.5 consecutive days.

First papers are available for free at the ICE Virtual Library: http://www.icevirtuallibrary.com/content/serial/geolett/fasttrack

Have a look!

Graduate assistantship (MS in Engineering System-Mechanical) available in the University of North Texas-Denton

Submitted by zhappybird on

A RA (MS level) position is available in the Department of Engineering Technology, University of North Texas-Denton in the fields of characterization of piezoelectric crystals, design and modeling of piezoelectric resonators and sensors. The position will start from spring, 2012. Candidates should have a Bachelor/Master's degree in engineering mechanics, mechanical engineering or electrical engineering with good academic standing and should have some experiences in the following:

The indentation of pressurized elastic shells: from polymeric capsules to yeast cells - D.Vella, A.Ajdari, A.Vaziri & A.Boudaoud

Submitted by Amin Ajdari on

Pressurized elastic capsules arise at scales ranging from the 10 m diameter pressure vessels used to store propane at oil refineries to the microscopic polymeric capsules that may be used in drug delivery. Nature also makes extensive use of pressurized elastic capsules: plant cells, bacteria and fungi have stiff walls, which are subject to an internal turgor pressure. Here, we present theoretical, numerical and experimental investigations of the indentation of a linearly elastic shell subject to a constant internal pressure.

cyclic loading

Submitted by danielteruna on

Hi all,

 I am very appreciate if any one can help me to explain how to get hysteretic cuve using abaqus.

I have tried a cantilever plate subjected to cyclic loading but when I saw the graphic desplacement vs load, 

did not show a hysteresis loop. I  input the data of material (stress and plastic strain in isotropic hardening), because when I chose kinematic hardening

the program did not run. It may be the data is not completely. 

Thank you for your help

regard

daniel