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How to use ansys to model the tangential deformation of a rotating blade.

Submitted by julie liu on
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Dear all,

I have one question here. A blade is mounting on a rigid disk's outer rim. The disk is rotating at a variable angular speed. The system is  used to model a turbine wheel with a blade mounted on it when the engine is ramping up or shuttng down.

The thing I want to calculate is the blade tip deformation in tangential direction during this engine ramp up -steady state -shut down process. Does anybody know how to use ANSYS to model it?

Symposium on Multi-physics of Materials and Interfaces @ USNCTAM 2010

Submitted by Aman Haque on

Dear Colleagues:

As a part of the 16th US National Congress of Theoretical and Applied Mechanics conference (from June 27 to July 2, 2010 at Penn State University), we are organizing a symposium on the multi-physics, or the coupling among physical domains (thermal, electrical, mechanical, magnetic, optical, chemical to name a few).

A Geometric Theory of Thermal Stresses

Submitted by arash_yavari on
research
differential geometry
Thermal stresses
Geometric elasticity

In this paper we formulate a geometric theory of thermal stresses.

Given a temperature distribution, we associate a Riemannian

material manifold to the body, with a metric that explicitly

depends on the temperature distribution. A change of temperature

corresponds to a change of the material metric. In this sense, a

temperature change is a concrete example of the so-called

referential evolutions. We also make a concrete connection between

our geometric point of view and the multiplicative decomposition

Young Huang has been selected to appear on ISIHighlyCited.com

Submitted by Hanqing Jiang on
mechanician

Congratulations to Prof. Yonggang Huang who has been selected to appear on ISIHighlyCited.com because of his exceptional citation count in the field of Engineering.

 

http://hcr3.isiknowledge.com/author.cgi?&link1=Browse&link2=Results&id=6498

Publicly-available fatigue test data

Submitted by Mike Graham on
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Fatigue
experimental data

Can anyone help point me to publicly-available fatigue or fracture test data? I am interested in obtaining a variety of data for statistical processing. It seems many authors have used the data collected by Virkler and Hillberry which seems to be widely used, but I have not found raw data for their tests so far; is this data available somewhere for me to use? Any help is very appreciated.

Journal Club Theme of December 2009: Impact Behaviour of Materials with Cellular Structures

Submitted by Henry Tan on
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Journal Club Forum
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impact
Journal Club Forum
cellular materials

Welcome to the forum! Discussion topics were suggested initially as follow:

Metal foams, cell deformation (bending, buckling, plasticity and fracture), constitutive stress-strain behaviour of cellular materials, energy absorption, hypervelocity impact, shock wave behaviour, 1D shock modelling, shock attenuation, shock enhancement, Material Point Method (MPM) simulation and microscopic tomography experimental observation;

and later were extended to many related:

A new Technical Committee on Soft Materials

Submitted by Zhigang Suo on
mechanician

A growing number of mechanicians are entering the field of soft materials, such as polymers, gels, and tissues. While they interact with researchers in technical societies traditionally identified with the field, they also maintain connection with researchers in applied mechanics.

Course Announcement: EM 600 Aeroelasticity (Dept of Aerospace Engineering & Engineering Mechanics, San Diego State University)

Submitted by luciano demasi on
aeroelasticity
doublet lattice method

Hi all,

A new Aeroelasticy course is offered at San Diego State University. 

Course Description

VUMAT for Nitinol --- why VUMAT and not UMAT?

Submitted by cece83 on
research
Nitinol
VUMAT
Abaqus/Explicit

Dear all,

 I'm new in imechanica. I need some informations about VUMAT for Nitinol. I would like to implement in fortran a subroutine for the behaviour of shape memory alloy.I looked for some subroutines already implemented but they have been developed in the implicit way.

It's true that with the VUMAT(explicit) I could have some problems of stability and convergence.Could someone suggest me any reason to make this model in the VUMAT?I know that in VUMAT I can't redifine the time increment so before running the analysis It's important to pay attention on Dt.

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