TY - JOUR
T1 - Biological armors under impact - Effect of keratin coating, and synthetic bio-inspired analogues
AU - Achrai, B.
AU - Bar-On, B.
AU - Wagner, H. D.
N1 - Publisher Copyright:
© 2015 IOP Publishing Ltd.
PY - 2015/2/1
Y1 - 2015/2/1
N2 - A number of biological armors, such as turtle shells, consist of a strong exoskeleton covered with a thin keratin coating. The mechanical role upon impact of this keratin coating has surprisingly not been investigated thus far. Low-velocity impact tests on the turtle shell reveal a unique toughening phenomenon attributed to the thin covering keratin layer, the presence of which noticeably improves the fracture energy and shell integrity. Synthetic substrate/coating analogues were subsequently prepared and exhibit an impact behavior similar to the biological ones. The results of the present study may improve our understanding, and even future designs, of impact-tolerant structures.
AB - A number of biological armors, such as turtle shells, consist of a strong exoskeleton covered with a thin keratin coating. The mechanical role upon impact of this keratin coating has surprisingly not been investigated thus far. Low-velocity impact tests on the turtle shell reveal a unique toughening phenomenon attributed to the thin covering keratin layer, the presence of which noticeably improves the fracture energy and shell integrity. Synthetic substrate/coating analogues were subsequently prepared and exhibit an impact behavior similar to the biological ones. The results of the present study may improve our understanding, and even future designs, of impact-tolerant structures.
UR - http://www.scopus.com/inward/record.url?scp=84922463416&partnerID=8YFLogxK
U2 - 10.1088/1748-3190/10/1/016009
DO - 10.1088/1748-3190/10/1/016009
M3 - Article
C2 - 25599251
AN - SCOPUS:84922463416
SN - 1748-3182
VL - 10
JO - Bioinspiration and Biomimetics
JF - Bioinspiration and Biomimetics
IS - 1
M1 - 016009
ER -