Mechanical performance


Building components need to withstand a variety of different pressures, especially in their ability to withstand certain loads as well as widespread temperature fluctuations. Roof panels in particular can be exposed to heavy loads such as snow and water, meaning high bending strength is required.

For a simple supported composite panel, the deflection can be evaluated using the following equation described in figure 09. It is essential to ensure continuous bonding between the various layers of the composite panel.

 

Figure 09

Thanks to its unique cell structure, STYROFOAM™ is remarkable for its high, compressive strength, making it the ideal choice for composite panel construction where strength requirements are a key factor.

Whilst the required mechanical strength of the sandwich panel core will depend on the load cases, the technical data provides a useful guide to the relative performance of STYROFOAM™ products.

 

Figure 10: Deflection calculation

In the context of mechanical performance, the temperature resistance of panel core needs to be taken into consideration. Black colored facings exposed to direct sun light can achieve a surface temperature above + 80°C. The maximum service temperature of STYROFOAM™ is + 75°C. The installation between two facings might allow an exposure to a higher temperature level than 75°C, but this must be proven case by case.

   
Figure 11: Panel surface temperature with solar exposure