APPLICATION OF A MATHEMATICAL MODEL TO CALCULATE VALUES OF CROOK DURING DRYING OF OAK LUMBERS

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HEMASI A.H.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Journal: Year:2005 | Volume:10 | Issue:4 Page(s): 185-202

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Title

APPLICATION OF A MATHEMATICAL MODEL TO CALCULATE VALUES OF CROOK DURING DRYING OF OAK LUMBERS

Author(s)

HEMASI A.H. | Issue Writer Certificate

Keywords

OAKQ4

CROOKQ4

MATHEMATICAL MODELQ3

DRYINGQ2

LONGITUDINAL SHRINKAGEQ4

Abstract

Crook development, as one kind of warp can lead to yield and quality decrease during lumber DRYING. In this research in addition to study the mechanism of this kind of defect according to theoretical principals and experimental observations, utilizing an analytical MATHEMATICAL MODEL was investigated to predict the values of the CROOK. To do this, theory of elasticity and thermo elastic reciprocal theorem was used. Also to calculate the required force to restrict the CROOK, simple beam theory was applied. Results showed that differential LONGITUDINAL SHRINKAGE on opposite edges of boards is major cause of CROOK and this phenomena is also a function of initial and final M.C, length and width of the lumbers. Reliability of the model estimations was compared and approved by experimental results. Finally, the values of the CROOK and the required force to restrict it during DRYING of OAK lumbers with 2.5, 3.2 and 5cm thickness and different sizes was calculated and compared with each other.

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APA: Copy

HEMASI, A.H.. (2005). APPLICATION OF A MATHEMATICAL MODEL TO CALCULATE VALUES OF CROOK DURING DRYING OF OAK LUMBERS. JOURNAL OF AGRICULTURAL SCIENCES, 10(4), 185-202. SID. https://sid.ir/paper/7718/en

Vancouver: Copy

HEMASI A.H.. APPLICATION OF A MATHEMATICAL MODEL TO CALCULATE VALUES OF CROOK DURING DRYING OF OAK LUMBERS. JOURNAL OF AGRICULTURAL SCIENCES[Internet]. 2005;10(4):185-202. Available from: https://sid.ir/paper/7718/en

IEEE: Copy

A.H. HEMASI, “APPLICATION OF A MATHEMATICAL MODEL TO CALCULATE VALUES OF CROOK DURING DRYING OF OAK LUMBERS,” JOURNAL OF AGRICULTURAL SCIENCES, vol. 10, no. 4, pp. 185–202, 2005, [Online]. Available: https://sid.ir/paper/7718/en

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