Large Structures Seminar: Daniel Rayneau-Kirkhope
This talk is part of the AScI Thematic program "Challenges in Large Geometric Structures and Big Data" seminar. Check out our upcomning talks at https://aaltoscienceinst.github.io/lsbdseminar/.
| Where: | AScI lounge (TUAS 3161) |
| When: | 18.05.2015 @ 11.00 (sharp) |
| Speaker: | Daniel Rayneau-Kirkhope Aalto Science Institute |
| Title: | Structural hierarchy as a means to efficient, robust materials |
Hierarchical geometries are found throughout nature as a means to extremal properties [1]. Gecko’s remarkably adhesive toes [2], nacre’s incredible resistance to fracture [3] and bones’ stiff yet lightweight properties [4] are all dependent on utilisation of optimisation on multiple length-scales. Here I will introduce the hierarchical design principle with an example of a self-similar hierarchical frame optimised for compressive loading [5]. Following this, the effect of a single beam perturbation within such a structure will be analysed through analytic methods [6].
[1] R. Lakes, Nature (London) 361, 511 (1993)
[2] K. Autumn and N. Gravish, Phil. Trans. R. Soc. A 366 1575 (2008)
[3] J. Sun and B. Bhushan, R. Soc. Chem. 2 7617 (2012)
[4] J. Currey, The Mechanical adaptation of Bones, Princeton, New Jersey (1984)
[5] D. Rayneau-Kirkhope, Y. Mao, and R. S. Farr, Phys. Rev. Lett. 109 204301 (2012)
[6] D. Rayneau-Kirkhope, Y. Mao, and R. S. Farr, Phys. Rev. E 89 023201 (2014)