樟子松指接材抗弯强度有限元模拟分析  

Finite Element Analysis of Bending Strength for Pinus sylvestris var.mongolica Finger-Jointed Lumber

作　　者：何盛[1] 林兰英[1] 傅峰[1] 曹平祥[2] 

机构地区：[1]中国林业科学研究院木材工业研究所木质功能材料研究室,北京100091 [2]南京林业大学木材工业学院,南京210037

出　　处：《林业科学》2012年第11期63-68,共6页Scientia Silvae Sinicae

基　　金：国家科技支撑计划课题"非常用与低等级木材高效加工技术集成与示范"(2012BAD24B01)

摘　　要：采用ANSYS有限元分析软件,模拟分析3种嵌合度条件下樟子松结构用指接材的抗弯强度,实现对指接材抗弯强度的无损检测。当指榫嵌合度为0,0.1,0.3mm时,模拟分析得出的抗弯强度分别为78.0,72.0和45.0MPa。将模拟分析结果与试验测试结果进行对比可以发现,有限元模拟分析方法可以用于预测指接材的抗弯强度性能,但由于模拟过程中未考虑齿榫加工后干缩变形引起的指接嵌合度下降,因此导致模拟分析结果相对试验测试结果偏大20%左右。为减小模拟分析结果与试验测试结果间的误差,需要对模拟分析模型进行一定程度的修正。With the software of ANSYS for finite element analysis,the bending strength of Pinus sylvestris var.mongolica finger-jointed lumber for structural use under three different fitness ratio were modeled to realize the nondestructive test of the properties of finger-jointed lumber.According to the modeling results,the bending strength are 78.0,72.0 and 45.0 MPa respectively when the fitness ratio is 0,0.1 and 0.3 mm.Comparing the modeling results with the experimental results,it indicated that the bending strength from the modeling result is approximately 20% larger than that of the experimental test results.The discrepancy may caused by the neglection of the decrease of fitness ratio due to the shrinkage of the finger-joints after being cut.So it is necessary for the models to be modified to minimize the existed discrepancy.

关 键 词：樟子松 指接材 抗弯强度 有限元法 

分 类 号：F762.4[经济管理—产业经济]