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林业科学 ›› 2012, Vol. 48 ›› Issue (11): 63-68.doi: 10.11707/j.1001-7488.20121110

• 论文 • 上一篇    下一篇

樟子松指接材抗弯强度有限元模拟分析

何盛1, 林兰英1, 傅峰1, 曹平祥2   

  1. 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
  • 收稿日期:2011-12-21 修回日期:2012-03-08 出版日期:2012-11-25 发布日期:2012-11-25
  • 通讯作者: 林兰英

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

He Sheng1, Lin Lanying1, Fu Feng1, Cao Pingxiang2   

  1. 1. Wood Functional Materials Lab. Research Institute of Wood Industry, CAF Beijing 100091;2. College of Wood Industry, Nanjing Forestry University Nanjing 210037
  • Received:2011-12-21 Revised:2012-03-08 Online:2012-11-25 Published:2012-11-25

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0,0.1,0.3 mm时,模拟分析得出的抗弯强度分别为78.0,72.0和45.0 MPa。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。

关键词: 樟子松, 指接材, 抗弯强度, 有限元法

Abstract:

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.

Key words: Pinus sylvestris var. mongolica, finger-jointed lumber, bending strength, finite element method

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