Numerical investigation of honeycomb filled crash box for the effect of honeycomb's physical parameters on crashworthiness constants

摘要

The current research focuses on investigation of crashworthiness of the high-strength steel (HSS) columns filled with aluminium honeycomb. In this study, five variants of honeycomb thickness; Thickness-1, Thickness-2, Thickness-3, Thickness-4, Thickness-5 and six variants of honeycomb cell size; CellSize-1, CellSize-2, CellSize-3, CellSize-4, CellSize-5 and CellSize-6 are considered. Numerical analysis is performed for sandwich honeycomb separated by steel plates in HSS crash box and by inducing V-Notch triggers in the honeycomb. It was perceived that energy absorption (EA), specific energy absorption (SEA) and crush force efficiency (CFE) of Thickness-5 increased by 77%, 19% and 60% respectively compared to Thickness-1 and for CellSize-1, increased by 51%, 24% and 38% respectively compared to CellSize-6. Similarly, the crash box filled with V-Notch triggered honeycomb is increased by 10%, 17% and 4% respectively compared to crash box filled with regular honeycomb and 17%, 55% and 7% respectively compared to crash box filled with sandwich honeycomb.