Model fitting for visco-elastic creep of Pinus radiata during kiln drying

被引:24
|
作者
Haque, MN
Langrish, TAG [1 ]
Keep, LB
Keey, RB
机构
[1] Univ Sydney, Dept Chem Engn, Sydney, NSW 2006, Australia
[2] Univ Canterbury, Wood Technol Res Ctr, Christchurch 1, New Zealand
关键词
D O I
10.1007/s002260000058
中图分类号
S7 [林业];
学科分类号
0829 ; 0907 ;
摘要
This work examines the applicability of mathematical models for correlating the visco-elastic strains during kiln drying of radiata pine (Pinus radiata D. Don) sapwood at various temperatures and moisture contents. The eventual aim is to use a mathematical model incorporating these strains to optimise the drying schedules and minimise the degradation. Data sets from previous experiments (Keep 1998) obtained at temperatures from 20 to 140 degreesC for sapwood at 5, 15 and 20% moisture contents (dry basis) were analysed. The data were fitted for various theoretical models, namely the Maxwell, Kelvin and Burgers models, and the Bailey-Norton equation. The parameter values and standard errors for the above models over the range of experimental data have been determined. The results indicate that the Maxwell model did not fit the experimental data well, having only one parameter. In most cases, the Bailey-Norton equation was inadequate, as it is a power-law model with a predicted continuous increase in creep with time and does not predict a plateau in the creep strain, as has been observed for most of Keep's (1998) data. The Kelvin model gave a better fit than the Bailey-Norton equation for most of the data sets. From visual inspection of the plots for the experimental data and the model predictions with time, it was found that both the Kelvin and Burgers models fitted the data satisfactorily. However, the three-parameter Burgers model was not a significant improvement over the two-parameter Kelvin model at the 0.01 level of significance, as shown by an analysis of variance.
引用
收藏
页码:447 / 457
页数:11
相关论文
共 50 条
  • [31] A molecular visco-elastic model for informational thermodynamics of liquids
    Nettleton, RE
    ACH-MODELS IN CHEMISTRY, 1996, 133 (1-2): : 53 - 64
  • [32] Parametric smoothing model for visco-elastic polishing tools
    Kim, Dae Wook
    Park, Won Hyun
    An, Hyun Kyoung
    Burge, James H.
    OPTICS EXPRESS, 2010, 18 (21): : 22515 - 22526
  • [33] A model for ageing visco-elastic tension softening materials
    Sathikumar, S
    Karihaloo, BL
    Reid, SG
    MECHANICS OF COHESIVE-FRICTIONAL MATERIALS, 1998, 3 (01) : 27 - 39
  • [34] Dynamic visco-elastic buckling analysis for airway model
    Bando, Kiyoshi
    Ohba, Kenkichi
    Yamanoi, Yuta
    Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C, 2009, 75 (750): : 413 - 419
  • [35] Determination of constants of a visco-elastic model of a binding agent
    Endo, Mitsuru
    Yoshiba, Takeshi
    Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C, 1988, 54 (502): : 1246 - 1251
  • [36] Liquid water flow in Pinus radiata during drying
    Scheepers, Gerhard
    Moren, Tom
    Rypstra, Tim
    HOLZ ALS ROH-UND WERKSTOFF, 2007, 65 (04) : 275 - 283
  • [37] Flexural-slip during visco-elastic buckle folding
    Damasceno, Davi R.
    Eckert, Andreas
    Liu, Xiaolong
    JOURNAL OF STRUCTURAL GEOLOGY, 2017, 100 : 62 - 76
  • [38] Visco-elastic parameters of dental restorative materials during setting
    Dauvillier, BS
    Feilzer, AJ
    De Gee, AJ
    Davidson, CL
    JOURNAL OF DENTAL RESEARCH, 2000, 79 (03) : 818 - 823
  • [39] Evolution of host-inclusion systems: a visco-elastic model
    Zhukov, V. P.
    Korsakov, A. V.
    JOURNAL OF METAMORPHIC GEOLOGY, 2015, 33 (08) : 815 - 828
  • [40] Visco-elastic stress triggering model of Tangshan earthquake sequence
    万永革
    沈正康
    曾跃华
    盛书中
    徐晓枫
    Acta Seismologica Sinica(English Edition), 2008, (06) : 585 - 597