research

Bones generate electricity under pressure, and this electromechanical behavior is thought to be essential for bone's self-repair and remodeling properties. The origin of this response is attributed to the piezoelectricity of collagen, which is the main structural protein of bones. In theory, however, any material can also generate voltages in response to strain gradients, thanks to the property known as flexoelectricity.

The aim of this tutorial is to develop a step-by-step instructions for simulation of a welding process with the FEA-program LS-PrePost. The tutorial contain a simulation of a single-pass gas metal arc welding, but we can use the same method to simulate multi-pass welding.

Dear Colleagues,

Please see attached a recent article published in Scientific Reports on the fundamental nature of dislocation motion in crystals. Leave your comments or whatever you think of it.

Link: https://www.nature.com/articles/s41598-017-18254-5

Best,

Yizhe

Published in Advanced Materials: http://onlinelibrary.wiley.com/doi/10.1002/adma.201704530/full/

http://onlinelibrary.wiley.com/doi/10.1002/adfm.201704757/full Hydrogels are the focus of extensive research due to their potential use in fields including biomedical, pharmaceutical, biosensors, and cosmetics. However, the general weak mechanical properties of hydrogels limit their utility. Here, pristine silk fibroin (SF) hydrogels with excellent mechanical properties are generated via a binary-solvent-induced conformation transition (BSICT) strategy.

An article on the Guardian here.  Critics will say Shelkman has founded his own open access journal, here, probably competing with Nature, Cell and Science, which explains a lot.