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Effects of Nanoporosity on the Mechanical Properties and Applications of Aerogels in Composite Structures

Submitted by Jingjie Yeo on
research
Silica aerogel
Composites
molecular dynamics
LAMMPS

Newly published book chapter - http://link.springer.com/chapter/10.1007/978-3-319-31662-8_4 Aerogels are ultralight solids with nanoporous structure and are one of the world’s lightest materials available in the market. It is a dry gel, principally made up of 99.8 % of air and weighing just around three times that of air. The first aerogels were realized in 1931, when Kistler (J Phys Chem 36:52–64, 1932) attempted to remove liquid from a wet gel.

Multi-scale modeling of plastic deformations in nano-scale materials; Transition to plastic limit

Submitted by M. Jahanshahi on
research
Plasticity
nano-structures

Despite the controversial debates concerning a unified theory, the continuum plasticity has evolved during the last few decades and an uncountable number of articles has been published on the subject. The proposal of Lee to decompose the deformation gradient, F, into elastic part Fe and plastic part Fp (i.e. F=FeFp) combined with the principle of maximum plastic dissipation is used in many publications to formulate the ensuing developments.

Structural mechanics models for renewable energy applications

Submitted by marco.paggi on
research
Structural Mechanics; renewable energy applications

Dear Colleague,

the output of the FIRB Italian Project in the object (Politecnico di Torino, University of Salento and University of Trento, 2012-2016) has been published on the following permanent webpage:

http://musam.imtlucca.it/FIRB.html

Models and applications regard photovoltaic modules, solid oxide fuel cells, and piezoelectrical systems for energy harvesting.

Yours sincerely, 

Marco Paggi 

Principal Investigator 

 

 

 

Simulating topological changes in real time for surgical assistance

Submitted by Stephane Bordas on
research
cutting simulation
Cutting
fracture
real-time
contact

http://hdl.handle.net/10993/27800

A recent presentation at the Hamlyn symposium

http://orbilu.uni.lu/bitstream/10993/27800/1/hamlynSymposiumLondon_2016…

http://orbilu.uni.lu/bitstream/10993/27800/3/hamlynSymposiumLondon_2016…

Regards,

Stéphane

Effect of material nonlinearity on spatial buckling of nanorods and nanotubes

Submitted by Ajeet Kumar on
research
cauchy-born rule
elastic rods
surface stress
buckling

You may be interested in reading our following article: http://link.springer.com/article/10.1007/s10659-016-9586-1. We show the importance of incorporating material nonlinearity for accurate simulation of nanorods and nanotubes. The linear material laws are shown to give completely erroneous results. The nonlinear material laws for nanorods were obtained using the recently proposed "Helical Cauchy-Born rule". We also discuss how surface stress affects buckling in such nanostructures.

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