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- W104703598 abstract "approved: James B. Wilson Wood composite materials are hygroscopic when exposed to moist environmental conditions. The water absorbed by these materials can affect both their shortterm and long-term mechanical performance. Creep performance of wood composite materials under long-term loading in different environmental conditions is a complex problem and is important to the satisfactory in-service use of these materials. This study examines the creep deflection behavior of plywood and oriented waferboards subjected to long-term loading in different environmental conditions. The structural panels studied were commercial products and included Douglas-fir plywood and oriented waferboard made with Aspen and bonded with either phenolic (PF) or isocyanate (ISO) adhesives. Signature redacted for privacy. The experiment was conducted in four environmental conditioning rooms. They were the standard (72°F, 65% RH), TAPPI (72°F, 50%), hot-wet (90°F, 90% RH) and hot-dry (900F, 30% RH) rooms. Environmental condition significantly affects the creep properties of the three types of wood composite panels studied. Increased relative humidity was found to accelerate relative creep for all three types of materials. Product type is one of the main factors affecting creep properties of wood composites. Waferboards bonded with the different resins had significantly different relative creep values in the 90°F, 90% RH (hot-wet) condition. ISO-bonded waferboard crept much more in the hot-wet condition than the other panel types. Two out of three ISO-bonded board samples failed in the 90°F, 90%RH condition during the experiment. But in the other environmental conditions, ISObonded waferboard had better creep behavior than PF-bonded waferboard. Plywood showed the best creep behavior in comparison to the waferboards at all environmental conditions. Relative recovery was related to relative creep. The higher the relative creep, the higher the relative recovery for the three types of materials in the four environmental conditions. EFFECT OF ENVIRONMENTAL CONDITION AND PRODUCT TYPE ON CREEP PROPERTIES OF WOOD STRUCTURAL PANELS" @default.
- W104703598 created "2016-06-24" @default.
- W104703598 creator A5050903667 @default.
- W104703598 date "1987-12-03" @default.
- W104703598 modified "2023-09-27" @default.
- W104703598 title "Effect of environmental condition and product type on creep properties of wood structural panels" @default.
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- W104703598 hasPublicationYear "1987" @default.
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