Damage and creep mechanisms in OSB

Michael P. Wolcott, Wenhua Hua, Kenneth J. Fridley

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Oriented strand board (OSB) and other particulate wood composites usually display significantly higher creep than solid wood and plywood. This research investigated the effects of physical damage in wood strands induced by transverse compression on the creep behavior of wood strands. Mechanically conditioned strands with two levels of moisture content (MC) of 0 and 10% were compressed to three different strains of 35. 50, and 65% at room temperature. In addition, aspen strands were embedded within both face and core regions of OSB mats and then recovered by dissecting the panels after hot-pressing. Two manufacturing variables were examined: panel densities (0.5 and 0.6 g/cm3) and strand moisture contents (0 and 10%). In all cases the pressing conditions accelerated the relative creep in the strands. Higher residual compression strain resulted in a higher relative creep. Increases in relative creep were more pronounced with strands with low moisture levels. Increased moisture in the wood is presumed to act as a plasticizer and result in decreased damage levels.

Original languageEnglish (US)
Pages (from-to)27-32
Number of pages6
JournalAmerican Society of Mechanical Engineers, Applied Mechanics Division, AMD
Volume221
StatePublished - Dec 1 1997

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

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