Tangential shrinkage was measured on longitudinal-tangential slices of separate earlywood and latewood from one board of Eucalyptus regnaw F.Muell. at various temperatures. Large amounts of collapse shrinkage were measured in the latewood slices, and lesser amounts in the earlywood slices. Collapse shrinkage in the earlywood was found only when the slices were dried at temperatures above a minimum temperature (the "collapse threshold temperature"). End-coated board sections approximately 200 mm long were rapidly dried at dry-bulb temperatures below the collapse threshold temperature for earlywood. Incipient internal checks were found in the latewood of these boards. Board sections dried at higher temperatures showed internal checks starting in both early and latewood. A non-linear drying simulation model was modified to take the heterogeneous nature of wood into account. This model predicted that internal checks would form in this wood even if it were dried sufficiently slowly to avoid surface checking.

Item Type:	Refereed Article
Research Division:	Engineering
Research Group:	Other Engineering
Research Field:	Engineering not elsewhere classified
Objective Division:	Manufacturing
Objective Group:	Wood, Wood Products and Paper
Objective Field:	Wood, Wood Products and Paper not elsewhere classified
UTAS Author:	Innes, TC (Dr Trevor Innes)
ID Code:	8702
Year Published:	1996
Web of Science® Times Cited:	8
Deposited By:	Civil and Mechanical Engineering
Deposited On:	1996-08-01
Last Modified:	2011-08-19
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