[1]刁海林,罗建举,蔡道雄. 水浸时效对红锥木材蠕变特性的影响[J].西北林学院学报,2015,30(02):217-220.[doi:doi:10.3969/j.issn.1001-7461.2015.02.38]
　DIAO Hai-lin,LUO Jian-ju,CAI Dao-xiong. The Influence of Water Immersion Aging on Creep Characteristics of Castanopsis hystrix Wood[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2015,30(02):217-220.[doi:doi:10.3969/j.issn.1001-7461.2015.02.38]
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 水浸时效对红锥木材蠕变特性的影响()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第30卷
期数:
2015年02期
页码:
217-220
栏目:
出版日期:
2015-03-30

文章信息/Info

Title:
 The Influence of Water Immersion Aging on Creep Characteristics of Castanopsis hystrix Wood
文章编号:
1001-7461(2015)02-0217-04
作者:
 刁海林1; 罗建举1; 蔡道雄2
 （1.广西大学 林学院，广西 南宁 530004；2.中国林业科学研究院 热带林业实验中心, 广西 凭祥 532600）
Author(s):
 DIAO Hai-lin1;  LUO Jian-ju1;  CAI Dao-xiong2
 （1.Forestry College, Guangxi University, Nanning, Guangxi 530004,China；2. Experimental Center of Tropical Forestry, CAF, Pingxiang, Guangxi 532600, China）
关键词:
 ; 红锥; 木材; 水浸时效; 蠕变特性
Keywords:
Castanopsis hystrix; wood; water immersion aging; creep characteristic
分类号:
S781.71
DOI:
doi:10.3969/j.issn.1001-7461.2015.02.38
文献标志码:
A
摘要:
 采用4点加载方式分别对红锥自然气干试材及水浸时效试验材料进行短时间(420 min)弯曲蠕变试验，获取红锥木材在2种不同时效状态下的弯曲蠕变特性常数，分析2种时效状态下红锥的蠕变性能，并对水浸时效对红锥蠕变性能的改善效果作出评价。结果表明，在弯曲应力为σb40%的荷载下，红锥自然气干材的蠕变特性常数J0为8.408×10-7cm2/N、η0为436.293×10-7min N/cm2、∑Ji为0.784×10-7cm2/N；红锥水浸时效材的蠕变特性常数J0为7.752×10-7cm2/N、η0为502.000×10-7min N/cm2、∑Ji为0.341×10-7cm2/N。红锥木材经水浸时效处理后，其瞬间弹性柔量J0及延迟弹性柔量∑Ji均较气干材有所降低，而粘性系数η0则较气干材有较大幅度的提高。说明红锥木材经水浸时效处理后其抗瞬间弹性变形能力、抗延迟弹性变形能力及抗长期粘性变形的能力得到增强。
Abstract:
 By means of the four-point loading, a short time (420 min) bending creep testing on air-dried wood samples and water immersion aging samples of Castanopsis hystrix were respectively carried out to obtain the bending creep characteristic constants of the woods under two different aging states, and to analyze their creep properties under two different aging states, also to evaluate the improvement effect of the creep properties after water immersion aging. Experimental results showed that when the load of bending stress was under 40% of tensile strength, constants J0, η0, and ∑Ji of creep properties of air-dried wood sample were 8.408×10-7cm2/N, 436.293×10-7min N/cm2, and 0.784×10-7cm2/N, respectively. While after the wood had been immersed in water, the constants of J0, η0, and ∑Ji were 7.752×10-7 cm2/N, 502.000×10-7 min N/cm2, and 0.341×10-7 cm2/N, respectively. The conclusions were that comparing with air-dried wood, after the wood had been immersed in water with aging treatment, both of instantaneous elastic compliance J0 and delayed elastic compliance ∑Ji were lower than the constants of the air dried wood, but the resistance of viscous coefficient had been significantly improved comparing with the air-dried wood. It showed that after the immersed treatment in water, the resistance abilities of instantaneous elastic deformation, delayed elastic deformation and long time viscous deformation were improved.

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备注/Memo

备注/Memo:
 收稿日期：2014-06-07修回日期：2014-08-25
基金项目：广西林业重大招标项目“主要速生人工林树种材性改良与深加工利用”(桂林科字[2009]第7号)。
作者简介：刁海林，男，副教授，研究方向：木材性能及加工利用。E-mail：diaohailin@sina.com
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