文献类型：期刊文献

中文题名：兴安落叶松目测等级锯材抗拉强度的宽度尺寸效应

英文题名：Size effects of width on tensile strength of visually-graded Chinese larch lumber

作者：周海宾[1] 江京辉[1] 王学顺[2] 任海青[1]

第一作者：周海宾

机构：[1]中国林业科学研究院木材工业研究所;[2]北京林业大学理学院

年份：2012

卷号：34

期号：1

起止页码：127-130

中文期刊名：北京林业大学学报

外文期刊名：Journal of Beijing Forestry University

收录：CSTPCD;;北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；

基金：国家林业行业公益性项目(200904016;201104027;201104064)

语种：中文

中文关键词：兴安落叶松;锯材;目测等级;顺纹抗拉强度;尺寸效应

外文关键词：Larix gmelinii; lumber; visual grades; ultimate tensile strength（UTS）parallel to grain; size effect

分类号：S781.2

摘要：以兴安落叶松锯材作为研究对象,研究了不同目测等级下锯材试材宽度与其顺纹抗拉强度之间的依存性。选取3种宽度尺寸的目测等级锯材,分成高、低目测等级组,按照相同的测试跨度测试锯材顺纹抗拉强度,并利用斜率法和形状参数法估计高、低目测等级试材顺纹抗拉强度5%分位值的宽度尺寸效应。结果表明:1)落叶松锯材宽度增加,其顺纹抗拉强度下降。2)落叶松高、低目测等级锯材顺纹抗拉强度5%分位值的宽度尺寸效应系数分别为0.29和0.33。3)可以通过形状参数法确定落叶松目测等级锯材的顺纹抗拉强度的宽度尺寸效应系数。
The dependence between tensile strength and width of Chinese larch visually-graded dimension lumber was investigated.Three different width dimension lumbers were parted into two groups：high visual grade and low visual grade.The ultimate tensile strength parallel to grain was tested under same test span.The width size effects of 5th percentile of tensile strength were estimated by the slope method and the parametric method.The results were as the followings：1） Increasing the lumber width lowered the ultimate tensile strength parallel to grain.2） The estimated width effect parameters were 0.29 in high and 0.33 in low for the 5th percentile of the ultimate tensile strength parallel to grain.3） The parametric method could estimate the width size effects of the ultimate tensile strength parallel to grain.