杉木密度 干缩性

本数据记录了杉木中密度 干缩性的序号、记录本序号、试样序号、弦向炉干前尺寸、径向炉干前尺寸、顺纹方向炉干前尺寸、弦向炉干后尺寸、径向炉干后尺寸、顺纹方向炉干后尺寸、弦向干缩性、弦向干缩系数、径向干缩性、径向干缩系数、含水率、炉干前试样重、炉干前体积、炉干后体积、体积干缩性、体积干缩系数、试验时密度、含水率15%时密度等记录。木材物理力学的各项测定指标，直接反映此种木材的强度等特性，为木材利用和木结构的规范等提供科学数据。本数据库包括物理力学数据和其试验方法（请参看附件1中华人民共和国国家标准GB1927～1943-91《木材物理力学性质试验方法》，附件2木材物理力学各个项目的定义）。This dataset records the serial number of medium-density Chinese fir shrinkage tests, log serial number, specimen serial number, dimensions before kiln-drying in tangential, radial and along-grain directions, dimensions after kiln-drying in the three aforementioned directions, tangential shrinkage, tangential shrinkage coefficient, radial shrinkage, radial shrinkage coefficient, moisture content, specimen weight before kiln-drying, volume before kiln-drying, volume after kiln-drying, volumetric shrinkage, volumetric shrinkage coefficient, density during the test, and density at 15% moisture content, along with other related records. Various measured physical and mechanical properties of wood directly reflect the strength and other characteristics of this wood species, providing scientific data for wood utilization and the formulation of wood structural specifications. This database contains physical and mechanical property data and their corresponding test methods (please refer to Appendix 1: National Standard of the People's Republic of China GB 1927–1943-91 *Test Methods for Physical and Mechanical Properties of Wood*, and Appendix 2: Definitions of Each Item of Wood Physical and Mechanical Properties).

搜集汇总

背景与挑战

背景概述

该数据集记录了杉木的密度和干缩性等物理力学性质，包括弦向、径向和顺纹方向的尺寸变化及干缩系数等指标，为木材利用和规范提供科学依据。数据来源于国家林业和草原科学数据中心，质量高，格式为表格，包含437行20列的详细记录。