Polyurethane foam sandwich structures collapse modes under three-point bending

The aim of this analysis is to investigate the mechanical behavior of polyurethane foam sandwich sandwiches in three-point bending tests by varying the span length of test specimens and the core thickness. Theoretical models are represented that use foamed sandwich mechanics and classical beam theory. Tests were dispensed so as to seek out the link between the geometrical configuration of the sandwich and therefore the failure mechanism. The static bending tests created numerous collapse modes looking on support span distance and core layer thickness. Numerous failure modes and injury as well as indentation failure below the loading roller, core–upper skin delamination and core shear square measure reportable and mentioned the consequences of core thickness and span length on most static load and bending stiffness also are examined. it absolutely was ascertained that the span distance has important impact on the failure mode of the specimen.