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Harnessing snap-through instability in soft dielectrics to achieve giant voltage-triggered deformation

Submitted by Christoph Keplinger on
research
suo group research
large deformation
dielectric elastomer
snap-through instability
soft dielectrics
bauer group research

For a dielectric elastomer membrane we show giant voltage-triggered expansion of area by 1692%, far beyond the largest values reported in the literature.

 

 

 

 

 

 

 
 

SHPB Data Reduction Software

Submitted by Nathan Mutter on
Forums
Experimental Mechanics Forum
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Split Hopkinson Pressure bar (or Kolsky bar)

Hello,

I am
developing the first Split-Hopkinson Pressure bar device for my university and I
was wondering if anyone had some data reduction software/codes that they would
be willing to share.  I have heard that
others have developed such codes that take the input signals and perform the
proper analyses to produce the stress strain curves.  Any advice would be greatly appreciated.

 

Thanks,

 -Nathan

Corotational formulation for 3D solids

Submitted by likask on
research
mechanics
finite element
corotationa
lagrangian formulation

Please have look 
http://arxiv.org/abs/1110.5321
 
This paper presents the theory for the Lagrange co-rotational (CR) formulation of finite elements in the geometrically nonlinear analysis of 3D structures. In this paper, strains are assumed to be small while the magnitude of rotations from the reference configuration is not restricted. A new best fit rotator and consistent spin filter is derived. 

Regards,
Lukasz

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