Experimental investigation on the bending and buckling behavior of bio-based core innovative sandwich panels

Purpose The present study aims to experimentally investigate the flexural and buckling performances of novel sandwich panels manufactured with sawdust-based modified mortar core and both polypropylene and reinforced polymer plates as skins. Design/methodology/approach The experimental investigation includes two main steps, characterization tests were firstly carried out in order to identify the laws behavior of the constitutive raw materials. The second one investigates 42 sandwich panels tested under three-points bending and buckling according to standard norms. Findings The emphasized test results in terms of bearing capacity; buckling strength, ductility, and failure mechanisms confirm that the overall and observed behavior of tested eco-friendly panels was in general satisfactory compared with experimental values reported in the literature. Indeed, the failure modes under bending and buckling conditions were summarized as shear/crimping failure of the sawdust-based mortar core without debonding of the core-skins interface. Originality/value The paper provides original information about the development of novel sandwich panels with a bio-based core and polymer skins for construction usage as interior partitioning walls.

Automated summary

This study experimentally investigated the flexural and buckling performances of sandwich panels with sawdust-based modified mortar core and polymer plates as skins. The results showed that the eco-friendly panels exhibited satisfactory bearing capacity, buckling strength, ductility, and failure modes under bending and buckling conditions. The research provides original information for the development of novel sandwich panels for construction usage.