Repeated impact properties of rotationally moulded skin-foam-skin sandwich structure
Authors: saifullah, A., Thomas, B., Cripps, R. and Wang, L.
Conference: ANTEC 2020
Dates: 30 March-2 April 2020Abstract:
This paper presents an experimental investigation of repeated impact properties of rotationally moulded skin-foam-skin sandwich structures. The test was conducted at low velocity repeated impact conditions using an instrumented drop weight impact tester at 20 J and 30 energy levels. Rotationally moulded sandwich structures are becoming increasingly used in automotive, marine and other applications where an in-depth understanding on repeated impact properties is crucial. The Results of repeated drop-weight impact tests were analysed in terms of force-displacement, peak impact force, damage at each layer and the total number of repeated impacts needed to perforate the sandwich samples. A higher number of repeated impacts to perforate sandwich samples was observed for lower impact energy levels. The curves of peak impact force against the number of repeated impacts to perforate sandwich structures showed three distinct regions which are related to the damage initiation and propagation mechanisms of sandwich structures under repeated impact loading condition.