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:
Hi everybody,
I have done some experiments on the fracture toughness in mode II of wood specimens using attached geometry;so using
formula KIIc= 5.11P(3.1415*a)^0.5 /(2BW) I was able to calculate the frcature toughness of wood, but I am quite suprised
why this equation does not iclude depth of the specimens and moreover, I think that I have obtained higher values for the
fracture toughnes values. Is there any other formulation for obtaining the fracture toughness in mode II for this specimen?
P.s. dimension of my specimens is 100*100*63mm
In this paper we first obtain the order of stress singularity for a dynamically propagating self-affine fractal crack. We then show that there is always an upper bound to roughness, i.e. a propagating fractal crack reaches a terminal roughness. We then study the phenomenon of reaching a terminal velocity. Assuming that propagation of a fractal crack is discrete, we predict its terminal velocity using an asymptotic energy balance argument. In particular, we show that the limiting crack speed is a material-dependent fraction of the corresponding Rayleigh wave speed.
The U. S. National Congress on Theoretical and Applied Mechanics will be held at Penn State, from 27 June to 2 July, 2010.
Deadline for early registration: 31 March 2010
For more information see http://www.conferencetoolbox.org/USNCTAM2010/
I am looking for models or tutorials for cantilever beam with piezoelektric. Modeling in Ansys.
You are cordially invited to participate in the
Symposium on Flexible Multi Body Systems
at ICNAAM 2010 - 8th International Conference of Numerical Analysis and Applied Mathematics.
The conference will take place on September 19-25, 2010 at Rhodos Palace Hotel, Rhodes, Greece. Please visit the conference website for further information.
POSTGRADUATE AND POSTDOCTORAL OPPORTUNITIES EXIST
IN MECHANICS AND AEROSPACE DESIGN LAB IN UNIVERSITY OF TORONTO
We are seeking high calibre Masters and Doctoral students as well as Post Doctoral Fellows to join a very active and dynamic group at the University of Toronto. We are dealing with very exciting projects, including: Nanoengineering, Structural Health Monitoring, Design of Fast UAV (M=0.85), Structural Integrity of Aeroengine Compressor and Turbine Disc Assemblies, Morphing Wing Design, among many others.
Applications are sought for a postdoctoral position in Solid Mechanics at Brown University, with focus on the mechanics of energy storage materials. Interested candidates can contact Prof. Pradeep Guduru at Pradeep_Guduru [at] Brown.edu, with CV and a statement of research interests.
