In this paper we highlight several interesting phenomena that may emerge from coupling simple elastic systems like 1d bars. While in compostes we usually focus on wave propagation normal to the stratification direction (composite layers are coupled in series), here we show that extreme attenuation at multiple frequencies may emerge in linear systems that are coupled transversaly. We also introduce a simple device that act as a chopper for mechanical signals.
Article title: CAD-based collocation eigenanalysis of 2-D elastic structures
Journal title: Computers and Structures
Author: Dr. C Provatidis
Final version published online: 18-Dec-2016
DOI information: 10.1016/j.compstruc.2016.11.
Understanding the dynamic stability of bodies in frictional contact steadily sliding one over the other is of basic interest in various disciplines such as physics, solid mechanics, materials science and geophysics. Here we report on a two-dimensional linear stability analysis of a deformable solid of a finite height H, steadily sliding on top of a rigid solid within a generic rate-and-state friction type constitutive framework, fully accounting for elastodynamic effects.
hi ,
by using EFG with Lagrange multipliers for elastodynamics we will get below two equations .
M (U double dot)+C (U dot) + KU = F (ofcourse C=0 in my problem)
HU=q (q is not equal to zero) (where H= G Transpose)
