TY - JOUR
T1 - Examination of the Mode II fracture behaviour of wood with a short crack in an asymmetric four-point bending test
AU - Susanti, Cicilia Maria Erna
AU - Nakao, Tetsuya
AU - Yoshihara, Hiroshi
N1 - Funding Information:
The authors would like to thank Prof. Satoshi Sakamoto and Mr. He Wen of Shimane University for their help in conducting the experiment. This study was partly supported by a Grant-in-Aid for Scientific Research (C) (No. 21580207) of the Japan Society for the Promotion of Science (JSPS).
PY - 2011/11
Y1 - 2011/11
N2 - Asymmetric four-point bending tests of agathis specimens with a short crack along the neutral axis in a tangential-longitudinal system were conducted onto analyse the failure behaviour of wood with a short crack. The nominal shear strength and Mode II critical stress intensity factors of the specimens with various crack lengths were measured, and the influence of crack length on these properties was examined. The nominal shear strength of the cracked specimens was significantly lower than the strength of a crack-free specimen, even when the crack was extremely short. This finding suggests that the fracture mechanics theory is effective for analysing the failure behaviour of wood with a very short crack in this loading condition. However, the Mode II critical stress intensity factor still depends on the crack length. When the crack length was corrected with considering the formation of fracture process zone ahead of the crack tip, the critical intensity factor could be predicted effectively as well as the nominal shear strength.
AB - Asymmetric four-point bending tests of agathis specimens with a short crack along the neutral axis in a tangential-longitudinal system were conducted onto analyse the failure behaviour of wood with a short crack. The nominal shear strength and Mode II critical stress intensity factors of the specimens with various crack lengths were measured, and the influence of crack length on these properties was examined. The nominal shear strength of the cracked specimens was significantly lower than the strength of a crack-free specimen, even when the crack was extremely short. This finding suggests that the fracture mechanics theory is effective for analysing the failure behaviour of wood with a very short crack in this loading condition. However, the Mode II critical stress intensity factor still depends on the crack length. When the crack length was corrected with considering the formation of fracture process zone ahead of the crack tip, the critical intensity factor could be predicted effectively as well as the nominal shear strength.
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U2 - 10.1016/j.engfracmech.2011.07.014
DO - 10.1016/j.engfracmech.2011.07.014
M3 - Article
AN - SCOPUS:80052895700
SN - 0013-7944
VL - 78
SP - 2775
EP - 2788
JO - Engineering Fracture Mechanics
JF - Engineering Fracture Mechanics
IS - 16
ER -