Compact Energy Absorbing Cellular Structure
Author(s)
M. Ali, A. Qamhiyah, D. Flugrad & M. Shakoor
Abstract
The increasing demand of superior energy absorbing structures and materials to
meet the stringent design criteria and higher safety standards for confined
operating spaces leads to the advent of efficient compact cellular structures. This
paper presents a detailed study of an intelligent and compact graded cellular
structure that alleviates the impact damage(s) by undergoing a controlled
stepwise deformation process by wisely utilizing the stroke. The structure’s
geometry is observed in the cross-section of a banana peel that has a specific
graded cellular packing in a confined space. This packing enables the peel to
protect the internal soft core from external impacts. The same cellular pattern is
used to construct the structure. The energy absorbing characteristics of the
structure are evaluated with respect to a solid section by means of non-linear
finite element simulations using ABAQUS. The structure mitigates the dynamic
collapse damage(s) and acts as an effective energy absorber over a solid section.
Keywords: graded cellular structure, banana peel, collapse mechanism, plastic
deformation, energy absorbers.
1 Introduction
Energy absorbers are devices that convert kinetic energy into other forms e.g.,
pressure energy in fluids (e.g., varying cross-sectional area channels), elastic
energy in deformable solids (e.g., springs), and combination of elastic and plastic
energies in permanently deformable solids (e.g., sandwich panels). The primary
objective of energy absorbers is to keep the reactive force below a threshold
which will cause damage or injury. This objective is obtained by distributing the
load over a long stroke. In other words, energy absorbers perform their function
of reducing the load at the cost of long stroke and time. Other important
characteristics of the energy absorbers include the irreversible impact energy
Keywords
graded cellular structure, banana peel, collapse mechanism, plastic
deformation, energy absorbers.
Related Book
Other papers in this volume
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