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inflation

Inversion and perversion in twist incompatible isotropic tubes

Submitted by noyco on
research
twist
Elastomers
inflation
extension

How can we induce twist in tubular structures without applying a torque?

In nature, such behavior is enabled by material anisotropy. In our new work, we show that isotropic bi-layer tubes with twist incompatible layers can twist upon inflation and extension.
Interestingly, the direction of twist can spontaneously reverse as the load increases!

Check out our new paper at EML:
https://www.sciencedirect.com/science/article/pii/S2352431621000766

FLUID CAVITY HELP

Submitted by manz_0 on
ABAQUS
finite element
fluid cavity
inflation

I am modelling an inflated sphere. The sphere is composed off two circular planar membranes joined together at the boundries. 

I have modelled the inside of the sphere as a fluid cavity and will inflate it to its threshold limit. 



I have achieved this by using the fluid cavity and fluid inflator method but for some reason when I run my input file I receive the following message: 



 ***ERROR: THE FLUID INFLATOR ACTIVATION HAS BEEN SPECIFIED ON THE FLUID 

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