EURODYMAT 2006 - 8th International Conference on Mehanical and Physical Behaviour of Materials under Dynamic Loading
J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 1105-1111
DOI: 10.1051/jp4:2006134169

Effect of strain rate on the interlaminar fracture toughness of Zanchor reinforced composites

T. Kusaka¹, M. Hojo², T. Fukuoka³ and M. Ishibashi<sup>4

1</sup>  Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu 525-8577, Japan
²  Kyoto University, Yoshida-honmach, Sakyo-ku, Kyoto 606-8501, Japan
³  Mitsubishi Heavy Industries Ltd., 10 Oye-cho, Minato-ku, Nagoya 455-8515, Japan
⁴  Shikibo, Ltd., 1500-5 Shibahara-minami, Higashiomi 527-8577, Japan

Published online: 26 July 2006

Abstract
The interlaminar fracture behavior of Zanchor, which is a novel out-of-plane reinforcement technique developed by Mitsubishi Heavy Industries and Shikibo, reinforced composite laminates was studied to clear the mechanism of Zanchor reinforcement, where the effects of loading mode and loading rate on fracture behavior were mainly focused on. The mode I test results showed that the mode I fracture toughness of the Zanchor reinforced composites considerably decreased with increasing loading rate, where the reduction of mode I interlaminar fracture toughness at higher loading rates was a consequence of the loading rate dependence of microscopic fracture behavior. On the other hand, mode II test results showed that the mode II fracture toughness of the Zanchor reinforced composites increased with increasing loading rate, where the reinforcing mechanism of Zanchor under mode II loading was basically different from that under mode I loading.

© EDP Sciences 2006