基于早晚材的兴安落叶松成熟材力学模型——顺纹抗拉弹性模量  

Mechanical Models of Larix gmelinii Mature Clear Wood Based on the Properties of Earlywood and Latewood:Longitudinal Modulus of Elastic

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：《林业科学》2014年第9期118-123,共6页Scientia Silvae Sinicae

基　　金：国家林业公益行业科研专项“落叶松培育与高附加值集成材产业升级关键技术”(201104027)

摘　　要：以兴安落叶松成熟材为研究对象,探讨以早晚材物理力学为基本单元建立无疵试样力学模型的可行性。首先通过试验法获得兴安落叶松成熟材早、晚材薄片的物理力学性质,然后运用经典层板理论建立顺纹抗拉弹性模量力学模型,并进行试验验证。结果表明:以早晚材物理力学性质为建模基础的方法可行;密度是成熟材弹性模量变异性的主要影响因素;利用该方法建立的无疵试样力学模型,其相对误差低于5%,同时该方法能够为进一步建立兴安落叶松成熟材其他力学模型打下基础。In order to research the feasibility of modeling the mechanical performances of clear wood,in which the properties of earlywood（EW）and latewood（LW）were chosen as the fundamental elements of the models,Larix gmelinii mature wood was taken as research object. The properties of EW and LW were obtained by experiment at first. Then, according to the classical laminate theory,the model of clear wood longitudinal elastic modulus（ LMOE） ,was established and verified. The results of LMOE model showed that it was possible to set up Larix gmelinii mature clear wood mechanical models based on EW and LW,and density was the mainly factor influencing elastic property of mature soft wood in the models. There relative errors of LMOE model were less than 5%. Besides it was a basic method to set up other mechanical models of Larix gmelinii mature wood,of which EW and LW properties were the components.

关 键 词：兴安落叶松成熟材 顺纹抗拉弹性模量 力学模型 

分 类 号：S781[农业科学—木材科学与技术]