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How to represent a "bird" in ABAQUS

Submitted by jason Zhu on

Dear all,

   I will model a bird to impact a shell at high velocity by ABAQUS.  I decide to model the "bird" by ALE mesh and referred by EOS equation.

   However, most simulation works are done by LS-Dyna. Do anyone know how to determine the parameters in ABAQUS for the "bird" in EOS equation?

   All suggestions are welcome.

   Thanks.

 

Jason,

Best regards 

Fracture initiation in NiTi

Submitted by Jim S. Olsen on

Hi!

I am investigating the effect of triaxial stress state on the superelastic behavior in NiTi. In this regard I have conducted some simple tensile tests on notched specimen until fracture. The next step is to investigate the fracture surfaces in SEM to determine point of initiation and the structures. However, as my knowledge in fractography is limited at best, I am not really sure what to look for to determine eg. fracture initiation.

Lectures on Soft Active Materials, 2nd edition

Submitted by Zhigang Suo on

In May 2008, I posted 3 lectures on Soft Active Materials given at UCSB.  I have since given similar lectures on other occasions, but never all three at the same place.  The field has been active.  The lectures have been updated with new items.  I’m now posting the “2nd edition” of these lectures.

  • Dielectric elastomers
  • Neutral gels
  • Polyelectrolyte gels
  • pH-sensitive gels 

The slides are posted as delivered.  No effort is made to eliminate repeating slides. 

about the multiscale aggregating method (MAD) of Prof. Belytschko

Submitted by phunguyen on

Hello all

I have spent a large amount of time trying to undertstand the multiscale aggregating method (MAD) of Prof. Belytschko. Unfortunately, I still can not compltely understand the method. 

If there is anyone here in the forum already gets clear about the method, please help me.

 Phu

Using ABAQUS subroutine (UMAT,VUMAT) to modeling FGM plate

Submitted by mahmoud.k.e on

Hello every body

I am working on modeling FGM plate in abaqus6.8,i know that it's possible to modeling FGP by using UMAT subroutine for definig variation of material's properties,but i don't know how can i use this subroutine,could you tell me please?