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Title: Effect of Moisture Content on Stress Intensity Factors in Southern Pine

Source: International timber engineering conference

Author(s)Kretschmann, David E.; Green, David W.; Mainauskas, Vyto

Publication Year: 1991  View PDF »

Category: Conference Proceedings

Abstract: Studies were conducted to determine the mode I (opening) and mode II (forward shear) stress intensity factors KIcTL and KIIcTL for Southern Pine as a function of moisture content (MC). Compact-tension (mode I) and center-split beam (mode II) specimens were cut from standard 38-by 140-min (nominal 2-by 6-in.) boards. Specimens were sorted into five matched groups based on specific gravity. One group of specimens was saturated with water and four groups were equilibrated to MC levels of 4%, 8%, 12%, and 18%. Results indicate that both mode I and mode II stress intensity factors increase with decreasing MC from green to about 8% to 12%. Upon further drying, the stress intensity factors decrease. Stress intensity is also observed to be highly correlated to specific gravity.

Keywords: Southern; Pine; Mode I stress intensity factor; Mode II stress intensity factor; Moisture content effects; Fracture in wood

Publication Review Process: Non-Refereed (Other)

File size: 157 kb(s)

Date posted: 04/19/2012
RITS Product ID: 41910
Current FPL Scientist associated with this product
Kretschmann, David E.
Research General Engineer
  

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