Introduction

• Selection of structural materials corresponding to high inherent energy dissipation or damping depends on three factors
  • material properties
  • geometric property of the structural member and
  • type of loading
• Material properties are connected with the system parameters as follows:
  
  
  
• Damping capacity of structural materials may depend on the following mechanisms
  • dislocation movement: this occurs due to the presence of slip planes in crystalline materials;
  • grain boundary slip: movement of one grain over the other causes energy dissipation;
  • magnetoelastic effect: due to interaction between magnetization and strain of a magnetic material;
  • thermoelastic effect: due to interaction between thermal and mechanical deformation;
  • localized plastic strain - presence of defects like shear bands can entangle dislocations preventing the crystal from sliding. This may also create energy dissipation.