Surface morphology evolution in stressed solids: Surface diffusion controlled crack initiation
نویسندگان
چکیده
منابع مشابه
Current-induced stabilization of surface morphology in stressed solids.
We examine the surface morphological evolution of a conducting crystalline solid under the simultaneous action of an electric field and mechanical stress based on a fully nonlinear model and combining linear stability theory with self-consistent dynamical simulations. We demonstrate that electric current, through surface electromigration, can stabilize the surface morphology of the stressed sol...
متن کاملSurface Diffusion on Stressed Solid Surface
The surface diffusion of an axi-symmetric solid, a whisker, subject to applied uniaxial stress, is studied numerically based on a new boundary integral formulation for periodic stress configurations. An efficient semi-implicit time-stepping scheme is developed to treat the serve stiffness due to high-order derivatives. When the initial perturbation is small the effect of the stress on the motio...
متن کاملFast crack propagation by surface diffusion.
We present a continuum theory which describes the fast growth of a crack by surface diffusion. This mechanism overcomes the usual cusp singularity by a self-consistent selection of the crack tip radius. It predicts the saturation of the steady state crack velocity appreciably below the Rayleigh speed and tip blunting. Furthermore, it includes the possibility of a tip splitting instability for h...
متن کاملA Crack Detection Method in Road Surface Images Using Morphology
In this p;y)cr , ;I new crack detection rnethod in ro;ul surface inlagc based on morphological t,echniqrlr is proposed. Cracks arc difficult, t,o dct.ect directly at t.hc pixel level because of t , l ~ noise and the vagueness. Some kind of st,r~lct.ural information is needed. A crack is t,hought, tlo be ;I siiccession of dark saddle points with t,he linear feature. In the proposed met.hod , t,h...
متن کاملRail surface crack initiation analysis using multi-scale coupling approach
A concurrent multi-scale computational strategy for rail surface crack initiation analysis is introduced in current paper. It attempts to take advantage of the efficiency of macroscopic models and the accuracy of the mesoscopic models. The solving procedure is , through the coupling of individual approaches, beginning from the largest scale to the smaller scale, making use of multi-body dynamic...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the Mechanics and Physics of Solids
سال: 1994
ISSN: 0022-5096
DOI: 10.1016/0022-5096(94)90087-6