木材科学与技术2025，Vol.39Issue(1)：22-29,36,9.DOI:10.12326/j.2096-9694.2024073
水热处理温度对马尾松早材与晚材拉伸蠕变行为的影响
Effect of Hydrothermal Treatment Temperature on Tensile Creep Behavior of Earlywood and Latewood of Pinus massoniana
摘要
Abstract
A comparative study on the tensile creep behavior of earlywood(EW)and latewood(LW)obtained from the same growth ring of Masson pine(Pinus massoniana)was carried out at different temperature levels of hydrothermal treatment,to reveal the characteristics of the tensile creep behavior of water-saturated wood at the growth ring level.The tensile creep characteristics were then simulated using the Burger model for prediction.The results showed that EW was more prone to generate instantaneous elastic deformation and viscoelastic deformation than LW at each temperature level,regardless of tangential or longitudinal tension.The temperature ranging from 30℃to 80℃had no significant effect on the instantaneous elastic deformation of both EW and LW from Masson pine while the viscoelastic deformation and the plastic deformation heightened with the increasing temperature.The viscoelastic deformation of LW was more sensitive to temperature change than that of EW.The time required for the initial creep stage in LW was shorter than that in EW.The Burger model was approved to simulate the creep characteristic of water-saturated EW and LW under tangential and longitudinal tension,with a coefficient of determination(R2)of greater than 0.956.关键词
饱水木材/早材/晚材/温度/瞬时弹性变形/黏弹变形/Burger模型Key words
water-saturated wood/earlywood/latewood/temperature/instantaneous elastic deformation/viscoelastic deformation/Burger model分类
林学引用本文复制引用
黄鹤,李珠,蒋佳荔,李媛..水热处理温度对马尾松早材与晚材拉伸蠕变行为的影响[J].木材科学与技术,2025,39(1):22-29,36,9.基金项目
国家自然科学基金"基于生长轮尺度的早材与晚材机械吸湿蠕变行为及其互作机制"(32071689). （32071689）
