Performance of empty and foam filled composite corrugated plates subjected to lateral loading

摘要

Corrugated plates have been widely used in in various structural applications such as sandwich plate cores, roofing, bridges and buildings due to its higher strength and stiffness compared to the flat plates. In the present study, experimental work on the behavior of empty and foam filled composite corrugated plates under lateral loading was carried out. Woven roving [±45] glass and jute/epoxy materials were used for this investigation. Plates were of 200 mm length, 120 mm width and 20 mm height. Triangular and rectangular corrugation types were investigated. Polyurethane foam is used as a foam filler for the corrugated plates. Effect of the type of corrugation, material used, number of layers and the foam filler on the load-displacement relations were drawn and compared. Initial and mean load for the laterally crushed corrugated plates were included and compared. Total absorbed energy was obtained from the load-displacement graphs. Specific energy absorption has been plotted for the corrugated plates investigated. Failure modes for the corrugated plates were also investigated. Results show that the foam filled gkass/epoxy corrugated plates with rectangular corrugation absorbed energy higher 16.98% than the plates with triangular corrugation form. The four layers glass/epoxy corrugated plates supported load higher 33.15%, and 50.90% than the jute-glass and jute/epoxy corrugated plates respectively. Failure mechanism of the corrugated plates is influenced by the corrugation form and material used. The foam filled corrugated plates were more stable against buckling during the lateral loading compared to the empty corrugated plates.