Honeycomb for Energy Absorption

Hexweb honeycomb has been shown to be one of the most efficient materials available for energy absorption, according to Greene. This property can be attributed to an almost constant crush force exhibited through the length of the crush stroke which, in the case of aluminium honeycomb can be 70 to 80% of the original thickness.
Honeycomb materials are widely used for head impact protection to meet the US FMVSS201 requirements and offer potential solutions for Euro NCAP pedestrian impact legislation.
The absorption characteristics make it possible for honeycomb to absorb a given level of energy in a much smaller thickness than with other materials. This makes it particularly suitable for applications where space is limited, providing solutions in existing designs where other materials don’t work, and gives designers the possibility to reduce the thickness of sections required for energy absorption.
Computer modelling of the dynamic crush behaviour of honeycomb has been a concern for potential users due to the anisotropic behaviour of the material. However, published studies now provide the necessary information for modelling, and commercially available computer packages are starting to include elements for aluminium honeycomb.
Hexcel is a TS16949 approved supplier with a proven track record in the rapid development and supply of honeycomb absorber parts, supplied ready to fit to a vehicle.