文献类型：会议论文

英文题名：Mechanical Grading of Structural Larch Dimension Lumber

作者：Lou, Wanli[1] Ren, Haiqing[1] Wang, Zhaohui[1] Luo, Xiuqin[1]

第一作者：Lou, Wanli

通信作者：Lou, WL[1]|[a000505c700f8bc8f9efc]娄万里;

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China

会议论文集：13th International Conference on Non-Conventional Materials and Technologies

会议日期：SEP 22-24, 2011

会议地点：Changsha, PEOPLES R CHINA

语种：英文

外文关键词：dimension lumber; bending test; grade boundaries; mechanical grading

年份：2012

摘要：Larch dimension lumber bending strength properties from full-size bending test were used to establish preliminary grade boundary settings for mechanical grading of lumber by modulus of elasticity. Simulated production using the grade boundary settings were evaluated for modulus of rupture, ultimate tensile strength, and ultimate compressive strength. The results showed a good relationship between modulus of rupture and modulus of elasticity, and the observed relationships between strengths properties were consistent with that assumed for the standard grades. Through mechanical grading, larch dimension lumber could be sort grades: M14, M30 and M40. Assuming the visual requirements are met, the M30 and M40 grades account for more than 80% of the total production. Mechanical grading of larch appears to be a viable approach for grading Chinese large for structural applications.