MULTIFUNCTIONAL COMPOSITE MATERIAL INCLUDING A VISCOELASTIC INTERLAYER

摘要

The invention relates to a structure of composite material, comprising a continuous first layer (10) of composite material (1), a second layer (20) of viscoelastic material and a continuous impact-protection third layer (30). The first layer (10) is formed by structural components in the form of a matrix (11) and fibres (12). The second layer (20) of viscoelastic material is added on top of the first layer (10) and said second layer can be continuous or non-continuous. If a non-continuous second layer is used, elongate, circular or square cavities (25) are arranged inside said layer (20). Optionally, reinforcements (13) comprising carbon nanofibres or nanotubes are provided in either of the first and second layers (10, 20). The third layer (30) of impact-protection material is added in a continuous manner on top of the second layer (20), said third layer (30) forming the outermost layer of the composite material (1). In addition, the third layer (30) is electrically conductive. The composite material (1) has noise attenuation, impact resistance and electric conductivity properties.