The influence of microfibril angle on the longitudinal shrinkage-moisture content relationship

✍ Scribed by B. A. Meylan

• Publisher: Springer
• Year: 1972
• Tongue: English
• Weight: 547 KB
• Volume: 6
• Category: Article
• ISSN: 0043-7719
• DOI: 10.1007/bf00357051

✦ Synopsis

Incremental longitudinal shrinkage has been measured on 44 samples of Pinus radiata at each 5% increment of moisture content from 0 to 25O/o . The samples range in mean microfibril angle from 10 ~ to 40 ~ The data is presented in the form of a family of curves, of incremental shrinkage against microfibril angle, for each moisture content. This family of curves compares very closely with those derived theoretically by Barber [1968] and Cave [1972] based on considering the cell wall as a fibre composite of cellulose microfibrils embedded in a matrix which swells on wetting and whose shear modulus is a function of moisture content.