An identification of nonlinear dissipative properties of constructional materials at dynamical impact loads conditions

• DOI: 10.1007/s11012-014-9931-z
• Publication Date: 2014-04-07T06:26:34Z
• Authors: Mirosław Bocian; Krzysztof Jamroziak; Maciej Kulisiewicz
• Keywords: 0203 mechanical engineering; Mechanics of Materials; Mechanical Engineering; 02 engineering and technology; Condensed Matter Physics

The dissipative properties of most structural materials are usually described by a viscous damping parameter determining the rate energy dissipation. stem from traditionally adopted rheological Kelvin model. However, analytical description dynamic modern materials, including biological often poses difficulties, due to fact that stress–strain dependence in these is not linear. Therefore method nonlinear form characteristic $$ D\left( {x,\dot{x}} \right) (is presented. As it assumed, mathematical function consist term g(x) arbitrary and so called mixed κ(x)v where κ(x) deformation x v—velocity deformation. viscoelastic element which made tested material can be measured as displacement single mass m relative point complex vibratory system. proper analysis movement allows evaluate functions what fundamental aim presented method. Beside some computer examples useful evaluation (e.g. composites).