The Engineering Science and Mechanics (ESM) Department at Virginia Tech is seeking a non-tenure track Instructor that will begin on August 10, 2010. The successful candidate will have a Ph.D. or a M.S. in Engineering Mechanics or a related discipline. Candidates with an M.S. degree must have taken a minimum of 18 graduate semester hours of courses related to engineering mechanics. Teaching experience in a university or college is preferred.
hello everybody
i want to know what is the meaning of back stress and its effect on drucker prager yield criterion for viscoelasticity materials
thank you
Hello to all
if anybody can know any usefull book and review or any other comprehensive sources for learning dissipative particle hydrodynamics please introduce here. by the way is any pre writen codes availabe ?
best regards
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.
Hello,
I wanted to simulate a piece on Abaqus while using a written subroutine under fortran and I am has the research of a method to follow to make a test
thank you has the advance
cordially
