News Column

New Bionic Engineering Data Have Been Reported by Investigators at Dalian University of Technology

May 28, 2014

By a News Reporter-Staff News Editor at Journal of Engineering -- Researchers detail new data in Bionic Engineering. According to news reporting from Dalian, People's Republic of China, by VerticalNews journalists, research stated, "The mechanical properties of the skull and the anti-shock characteristics of woodpecker's head were investigated by experiment and numerical simulation. We measured the micro-Young's modulus of the skull by nano-indentation method and calculated the macro-equivalent Young's modulus of the skull at different positions using homogenization theory."

The news correspondents obtained a quote from the research from the Dalian University of Technology, "Based on the Computerized Tomography (CT) images of woodpecker head, we then built complete and symmetric finite element models of woodpecker's skull and its internal structure and performed modal analysis and stress spectrum analysis. The numerical results show that the application of pre-tension force to the hyoid bone can increase the natural frequency of woodpecker's head. The first natural frequency under the pre-tension force of 25 N reaches 57 Hz, which is increased by 21.3% from the non-pre-tension state and is more than twice the working frequency of woodpecker (20 Hz 25 Hz). On the application of impact force to the tip of beak for 0.6 ms, high magnitudes of stress component occur at around 100 Hz and 8,000 Hz, far away from both the working frequencies and the natural frequencies of woodpecker head."

According to the news reporters, the research concluded: "The large gaps among the natural, working and stress response frequencies enable the woodpecker to effectively protect its brain from the resonance injury."

For more information on this research see: Frequency Analysis and Anti-Shock Mechanism of Woodpecker's Head Structure. Journal of Bionic Engineering, 2014;11(2):282-287. Journal of Bionic Engineering can be contacted at: Science Press, 16 Donghuangchenggen North St, Beijing 100717, Peoples R China. (Elsevier -; Journal of Bionic Engineering -

Our news journalists report that additional information may be obtained by contacting Z.D. Zhu, Dalian University of Technology, State Key Lab Struct Anal Ind Equipment, Dalian 116024, People's Republic of China. Additional authors for this research include C.W. Wu and W. Zhang.

Keywords for this news article include: Asia, Dalian, Bionic Engineering, People's Republic of China

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Source: Journal of Engineering

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