铁杉密度 干缩性

本数据记录了铁杉中密度 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 shrinkage properties of medium-density hemlock, logbook serial number, specimen serial number, dimensions before kiln drying in the tangential direction, dimensions before kiln drying in the radial direction, dimensions before kiln drying along the grain direction, dimensions after kiln drying in the tangential direction, dimensions after kiln drying in the radial direction, dimensions after kiln drying along the grain direction, 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 at the time of testing, and density at 15% moisture content, along with other related records. All 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 codes. 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 GB1927～1943-91 *Test Methods for Physical and Mechanical Properties of Wood*, and Appendix 2: Definitions of each item for wood physical and mechanical properties).

搜集汇总

背景与挑战

背景概述

该数据集记录了铁杉的密度和干缩性物理力学性质数据，包括试样尺寸、干缩性指标和密度等关键参数，为木材利用和规范提供科学依据。数据质量高，错误率低，来源于国家林业和草原科学数据中心。