Damping Material Hybrid Composite Systems

This paper describes how damping materials frequently fall with two damping mechanisms: extensional and shear dissipation. Shear dissipation is commonly known as constrained layer. Typical extensional damping materials are viscoelastic materials. Extensional dissipation occurs from the axial strain undergone by the viscoelastic material. Common sheet extensional damping materials are polymer based or asphalt. Common liquid extensional damping materials are latex based with various fillers. Fillers can be mica, calcium carbonate, carbon black, barium sulfate and a host of other materials. Common constrained layer damping materials consist of butyl and aluminum facing. Extensional and constrained layer damping systems in the past have pretty much remained mutually exclusive. However, a damping material of only homogenous extensional or shear damping faces constraints in the form of effective temperature region and weight. This paper investigates whether effective damping hybrid composite systems can be created that incorporate both damping mechanisms and whether good damping can be obtained when non-traditional damping materials are used in hybrid composite systems.

Language

  • English

Media Info

  • Media Type: CD-ROM
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 663-670
  • Monograph Title: Noise-Con 04. The 2004 National Conference on Noise Control Engineering

Subject/Index Terms

Filing Info

  • Accession Number: 01054317
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Jul 25 2007 5:33PM