Thermal conductivity of sandwich panels made with synthetic and vegetable fiber vacuum-infused honeycomb cores

Abstract

Building, naval, and automotive industries have deep interest in eco-friendly, lightweight, stiff and strong materials. In addition, materials with low thermal conductivity are desirable in many applications where energy savings and thermal comfort are needed. In response to these requirements, sandwich panels were manufactured using glass and jute fiber composite skins bonded to different cores: balsa wood, Divinycell® and honeycombs. These honeycombs, as well as the skins, were manufactured by the vacuum infusion technique using polyester resin and jute, glass and carbon fiber fabrics. In this work, the thermal properties and density of the sandwich panels were measured and compared.

Investigation of thermal properties of Al1050/SS304 sandwich composite sheet by using a numerical, analytical and experimental approach

“…For the defined heat flux the temperature of 119°C is observed at the upper surface (T 3 ) and the temperature of 116°C at the lower surface (T 2 ). The obtained temperature difference and heat flux are further utilized for the calculation of the thermal conductivity (W/mK) using equation (3). The experimentally calculated thermal conductivity for Al1050/SS304 sandwich composite material is 2.93 W mK −1 .…”

“…The temperature sustainability was found to be increased to 350°C for silicone-based coating. Whereas Vitale et al [3] studied the density and the thermal properties of the honeycomb sandwich panels. The vacuum infusion technique was utilized to bond the jute fibre composite skin and glass to different cores like honeycombs, wood, and Diviny cell.…”

Sandwich Structure Composite with Expandable Graphite Filled or Coated: Evaluation of Flame Retardancy and Mechanical Performances

“…However, their poor fire resistance is the critical problem of the sandwich structures in engineering applications [4]. Most of the materials that are used for the polymer matrix of the face sheets (epoxy, vinyl ester, polyester resin) and the core materials (polymeric foam, balsa wood, honeycomb) are flammable [5]. In the presence of fire or high temperature, the sandwich structures will decompose, ignite and burn, releasing heat, smoke, toxic gases, which can cause severe injury and death [6] [7].…”

Flexural behavior of sandwich panels with cellular wood, plywood stiffener/foam and thermoplastic composite core

“…Negro et al [14] experimentally investigated an alternative approach of lightening sandwich panels where plywood surfaces has been combined with honeycomb core. The work of Vitale et al [15] shows that balsa wood is still competitive option of bio-based sandwich panels, in terms of thermal and mechanical properties, even compared to honeycomb cores.…”