Size effects

On Tuesday 24th October at 3:00 pm (Italian time) Samuel Forest will offer the seminar “Strain gradient plasticity based on saturating internal variables” at the Department of Civil, Environmental, Architectural Engineering and Mathematics of the University of Brescia (Italy). Here attached please find the abstract of the seminar. 

Anyone may directly join online through Google Meet at 

https://meet.google.com/rad-ehjg-ker

Abhishek Arora, Rajat Arora, Amit Acharya

Dear Colleague:

We are delighted to announce that a Focus Issue entitled "Intrinsic and extrinsic size effects in materials" for the Journal of Materials Research (JMR) is now open for submission:

https://www.cambridge.org/core/journals/journal-of-materials-research/in...

Max Planck Institute of Colloids and Interfaces and Hysitron, Inc. are pleased to present Nanobrücken 2015: A Nanomechanical Testing Workshop & Hysitron User Meeting, which will take place on April 21-23, 2015 in Potsdam, Germany. Nanobrücken 2015 is the fifth edition of the now-annual Nanobrücken workshop series, having been hosted in both Saarbrücken and Dresden.

The Keynote Speaker for this year's workshop will be Prof. Mathias Göken, Universität Erlangen-Nürnberg.

This paper reports the quantitative measurement of a full spectrum of mechanical properties of fivefold twinned silver (Ag) nanowires (NWs), including Young’s modulus, yield strength, and ultimate tensile strength. In-situ tensile testing of Ag NWs with diameters between 34 and 130 nm was carried out inside a scanning electron microscope (SEM). Young’s modulus, yield strength, and ultimate tensile strength all increased as the NW diameter decreased.

Dear Colleagues:

In this paper that was published a few months ago, we reported the size effects on the elastic modulus and fracture strength of silicon nanowires. In addition, we observed that the silicon nanowires are linear elastic until fracture with a very large fracture strain up to 12%.

Y. Zhu, F. Xu, Q. Qin, W. Y. Fung, and W. Lu, Nano Letters 9, 3934-3939, 2009

Abstract:

Dear Esteemed Researcher,

 doi:10.1016/j.jmps.2007.03.009

Hi All :

I was wondering why some people prefer to use Non Local Model while some others use Implicit Gradient Model (which can be derived from Non Local Model) .

When implicit Gradient Model is itself derived from Non Local Model ,and its FE implimentation just involves an additional average to be calculated and what is the need to introduce gradient terms ??

Thanks Alot

Kapil