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SUMMARY: Numerical Investigation of Orientation Effects in Cross-grain Fra
 cture of Wood - Dr Hao Yin\, CUED
DTSTART:20250131T143000Z
DTEND:20250131T150000Z
UID:TALK227674@talks.cam.ac.uk
CONTACT:46601
DESCRIPTION:Previously developed 3D Connector-Beam Lattice Model for Wood 
 (CBL-W) has proved its capability in predicting crack initiation and growt
 h in wood mesoscale cellular structures. Now the CBL-W model has been util
 ized to investigate the growth-ring orientation effects observed in the co
 mpact tension tests of eastern spruce. The numerical investigation involve
 d specimens with a 5-mm precrack loaded at three different end-grain orien
 tations relative to initial crack directions: 0\, 45\, and 90 degrees. Res
 ults showed that cracks followed a straight radial path\, due to the early
 wood and latewood cell wall tearing\, dominant at 0 degree\, produced high
 er energy release than cell wall separation through the earlywood and late
 wood boundaries before settling once again in an earlywood region\, which 
 dominates in 45 and 90 degrees crack propagation. Partial fracture deflect
 ion and meandering have been identified as one of the most dominant mechan
 isms for toughening\, observed in the post-peak stages of crack growth.
LOCATION:Oatley 1 Meeting Room\, Department of Engineering
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