講師：Subhadeep Roy (Earthquake Research Institute, University of Tokyo)
題目： Fracture in Different Scales: A Statistical Mechanical Approach
Fracture is a complex phenomenon involving large span of time and
length scales, starting from atomic scale or laboratory scale to
geological scale like earthquake. A failure process can take place
showing precursory rupture events, or catastrophically without showing
such precursor. Also the rupture events might show correlation among
themselves or might happen in a random manner. So the important question
is: What are the physical criteria that govern the mode of failure?
In statistical mechanics, disorder systems and systems out of
equilibrium are extensively studied in the last decade. So it will be
interesting to study fracture in statistical mechanical point of view.
The talk deals with the implementation of two main factors, disorder
and stress release range, that guides failure process. A a statistical
model namely Fiber Bundle Model is used to study the effect of above
two parameters on the failure process, starting from laboratory scale