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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

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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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:

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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