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Effects of the constraint’s curvature on structural instability: tensile buckling and multiple bifurcations

Submitted by Davide Bigoni on
research
structures
instability

Can a single-degree-of-freedom elastic structure have two buckling loads?

We provide a positive answer to this question, see http://www.ing.unitn.it/~bigoni/multiple_bifurcations.html

 

Dynamic Electrostatic Lithography: Multiscale On-demand Patterning on Large-Area Curved Surfaces

Submitted by Qiming Wang on
research
SAMs Lab research
dynamic electrostatic lithography
multiscale on-demand patterning
concave pattern

Dynamic Electrostatic Lithography: Multiscale On-demand Patterning on Large-Area Curved Surfaces

Qiming Wang, Mukarram Tahir, Jianfeng Zang, and Xuanhe Zhao*

 Advanced Materials, In press 

Friction Stir Spot Welding model

Submitted by buchibabu05 on
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Hi,

   In my fssw modeling, I'm using Johnson cook material model and C3D8RT element. I checked the consistancy of units also.

 

   My job is running upto 7frames out of 20frames and suddely aborting saying "the defomation speed exceeded the wave speed due to the excessing temperature and badly distorted elements" 

   Some times it also terminating saying "excess temperature occurs in solving the heat transfer equations"

 

can any body help me to complete my job please.

Need help with understanding Thin Plate Splines as Radial Basis function for Meshfree simulation

Submitted by VardhiniV on
research
meshfree

I want to try applying TPS as the RBF for the simulation of groundwater flow and transport. but the i'm getting error because of zeros in diagonal elements in the global matrix. Please help with the shape function

Dynamic model of ion and water transport in ionic polymer-metal composites

Submitted by Bo Li on
research
Review
soft active materials
IPMC
Actuation model
In the process of electro-mechanical transduction of
ionic polymer-metal composites (IPMCs), the transport of ion and water molecule
plays an important role. In this paper, the theoretical transport models of
IPMCs are critically reviewed, with particular emphasis on the recent
developments in the latest decade. The models can be divided into three classes,
thermodynamics of irreversible process model, frictional model and Nernst-Planck
(NP) equation model. To some extent the three models can be transformed into
each other, but their differences are also obvious arising from the various
mechanisms that considered in different models. The transport of ion and water
molecule in IPMCs is compared with that in membrane electrode assembly and
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