Dynamic modelling of some nonlinear materials
|Document type:||Conference Papers|
|Title:||Dynamic modelling of some nonlinear materials|
|Translated title:||Dynamisk modellering av några material|
|Conference name:||FORUM ACUSTICUM ( European Acoustical Association etc) SEVILLA September 16-20, 2002|
|Organization:||Blekinge Institute of Technology|
|Department:||Dept. of Mechanical Engineering (Institutionen för maskinteknik)
Dept. of Mechanical Engineering S-371 79 Karlskrona
+46 455 38 50 00
|Abstract:||A nonlinear layer can be a model for a cloud of gas bubbles in a liquid, a crack or split plane in a solid, or contact between two tighted surfaces. Solutions were derived for media under strong load.
Numerical calculations based on Preisach-Mayergoyz space description (nonlinear stress-strain relationships typical for solids containing mesoscopic inhomogeneities or defects) have given results like those obtained from LISA (see results by Delsanto).
Non-uniform massdistribution of grains immersed into a vibrating fluid create internal forces which is responsible for generation of higher harmonics.
Tests on slow dynamics were performed.
|Subject:||Mechanical Engineering\Structural Dynamics
|Keywords:||nonlinear material description, nonlinear acoustic crack detection, nonlinear elastic wave spectrosopy, nonlinear nondestructive testing, slow dynamics|