Thin-walled structures are currently used in automotive and aerospace fields due to their excellent lightweight and crashworthiness properties. This paper describes a new crush absorber design based on the Koch fractal (KF) geometry to improve energy absorption performance. The crash performance of three Koch fractal designs, one single-wall and two hybrid (double-wall), with different Koch fractal orders and wall thicknesses are investigated by experimental testing and computational modelling. Computational models of 1st order basic Koch and hybrid Koch structures are developed, with the predictions being compared with the experimental data. The computational simulations reveal a significant synergistic effect in the hybrid Koch structure, stemming from the interaction between the inner Koch wall and the external wall. Among the three designs of Koch structures, the 2nd order hybrid Koch absorbers give the highest specific energy absorption performance. Furthermore, these 2nd order hybrid Koch absorbers outperform a wide range of multi-cell structures of the same mass. The findings of this research open up a new route of designing novel lightweight energy absorbers with improved crash characteristics.
Materials & design – Elsevier
Published: Apr 15, 2018
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.
All for just $49/month
Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.
Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.
It’s easy to organize your research with our built-in tools.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera