Archive for January, 2009
Chemical company Huntsman has introduced a new system of manufacturing polyisocyanurate (PIR) sandwich panels. The major difference being, no adhesive is required for the foam to bond with the skin.
Polyisocyanurate foam is believed to have better fire properties then traditional polyurethane cored sandwiched panels. With stringent insurance and building code coming into effect in Europe and the UK, a simplified manufacturing process of PIR panels should help the adoption.
Press Release: Huntsman
In the building of large composite structures, such as the new the new aircraft by Airbus and Boeing, the use of computer modeling is playing an increasingly important role. The same is true in the design of composite sandwich structures used where weight, specifications, and cost are important.
By using what is called, “Finite Element Analysis”, or FEA, engineers can model a composite sandwich structure, and closely predict loads and failure points prior to actually constructing a panel. The engineer can vary skin and core material in the design, and vary lay-ups and ply schedules of the composite face sheets.
Doing this often elements the “guess and check” method of using composites for a product. Optimization allows the composite sandwich structure to meet all required levels of compression and shear stregth, while eleminiting any excess materials. This helps reduce weight, which is often the reason in selecting composites in the first place. Additionally, when weight is reduced and less material is used, costs go down, and this is important for everyone.
Here is a link to a recent NASA Tech Brief.
Popular FEA software used in composites include:
As most all businesses world wide are feeling the slowing economy, a Russian sandwich panel factory, seems to be unharmed. Built only a year ago, the plant is already seeing returns on its 10 million euro investment.
Full Article: Russia Today