CHARACTERIZATION OF THE THERMAL EXPANSION BEHAVIOUR OF A PVC FOAM CORE: NON-LINEARITIES AND GRADIENTS ACROSS THE WIDTH

摘要

A speckle full field interferometric technique is used for characterizing the Coefficient of Thermal Expansion of a PVC foam core through the thickness. A significant gradient is highlighted and is correlated to a gradient in density. A simulation shows the effect of taking such gradient into account on stress level in the core of a sandwich submitted to a temperature variation.