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Hysteretic damping in modal analysis using ANSYS

Submitted by saeed_11 on

Hello,

I want to do modal analysis of a structure with viscoelastic material. The viscoelastic
material has a complex youngs modulus E= E (1+i*g), where g is the loss factor. In ANSYS, modal analysis ignores all
nonlinearity, so how can I perform modal analysis with viscoelastic material?

OR

How can I perform modal analysis in ANSYS considering hysteretic damping (complex Young’s
modulus  E= E (1+i*g) as input).


Cheers

 

J Plastic Calculation

Submitted by nsanteb on
Dear All:
 
I completed calculating my stress-intensity factors by  modifying the verification test case  in ANSYS 
I need to calculate the J-plastic values for  Ramberg-Osgood type material using isotropic hardening for various n values . 
Does ANSYS have a Ramberg-osgood material model built in ?

The minimal nanowire

Submitted by lamm on

Advances in molecular assembly are converging to an ultimate in atomistic precision —nanostructures built by single atoms. Recent experimental studies confirm that single chains of carbon atoms —carbyne— exist in stable polyyne structures and can be synthesized, representing the minimal possible nanowire. Here we report the mechanical properties of carbyne obtained by first-principles–based ReaxFF molecular simulation. A peak Young’s modulus of 288GPa is found with linear stiffnesses ranging from 64.6–5 N/m for lengths of 5–64  ̊A.

STROH formalism or Lekhnitskii in MATLAB

Submitted by mgz1985 on

Hi All,

 I am a PhD student working with anisotropic elasticity to model T-stress. I understand the simplicity of derivation in Stroh formalism but am lost in the Matrix algebra whereas Lekhnitskii provides complex derivation for the formulation but on first glance, it seems more user friendly for numerical modelling.

 Does someone have an experience in modelling the either one formalisms with MATLAB and could he share his experience?

 Thanks for the sharing of information.

EU funded R and D Position – Software Programmer

Submitted by Philippe on

Overview



Simpleware (http://www.simpleware.com) is looking for a software programmer in a Research and Development role to develop novel image based mesh generation tools under the auspices of an EU Framework 7 Initial Training Network (ITN). You will be working closely with the Managing Director and the software development team. The position is open to nationals of any country except UK citizens or those that have been resident in the UK for more than 12 months in the last 3 years.



Post Doc Position: EPSRC – Software Programmer at the University of Exeter, Numerical Prediction of Moisture Damage in Asphalt

Submitted by Philippe on

Overview



A 24 Month Post Doctoral position is available at The University of Exeter (www.exeter.ac.uk) for a software developer in a Research and Development role to develop image processing tools under the auspices of an EPSRC grant. This is a joint project with TU Delft and De Montfort University. The work at Exeter will be in close collaboration with software company Simpleware Ltd (www.simpleware.com).