兴安落叶松成熟材顺纹抗拉力学模型的研究  

Mechanical models of Larix gmelini mature clear wood about longitudinal tensile properties

作　　者：郭莹洁[1] 赵荣军[1] 钟永[1] 任海青[1] 

机构地区：[1]中国林业科学研究院木材工业研究所,北京100091

出　　处：《安徽农业大学学报》2014年第2期183-187,共5页Journal of Anhui Agricultural University

基　　金：林业公益性行业专项(201104027)资助

摘　　要：以兴安落叶松成熟材为研究对象,通过试验法获得早晚材薄片的密度及顺纹抗拉强度,根据早晚材物理力学性质,建立并验证兴安落叶松成熟材无疵试样顺纹抗拉最大破坏载荷以及抗拉强度的力学模型。结果表明,密度可作为影响成熟材无疵试样抗拉强度变异性的主要影响因素;利用早晚材为基础单元,可建立无疵试样顺纹抗拉破坏载荷以及抗拉强度的力学表达式,其相对误差低于15%。该方法可为进一步建立兴安落叶松其他力学性质模型打下基础。According to the properties of earlywood（EW） and latewood（LW）, the longitudinal tensile per- formance models ofLarix gmelini mature wood were established and verified. The results show that density was the main factor influencing longitudinal tensile property of mature soft wood in the models. It was possible to set up mechanical models of longitudinal tensile failure load and strength of Larix gmelini mature clear wood with relative errors less than 15%. It is a basic method to build other mechanical models ofLarix gmelini based on EW and LW properties.

关 键 词：兴安落叶松成熟材 顺纹抗拉 最大破坏载荷 抗拉强度 力学模型 

分 类 号：S781.2[农业科学—木材科学与技术]