摘要
弹性常数(弹性模量和剪切模量)、强度常数与动态黏弹性是表征足尺人造板力学性能非常重要的3项指标,而弹性常数与强度常数间关系密切,因此,无损检测足尺人造板的弹性常数和动态黏弹性是其力学性能无损检测研究的焦点。本文首先对人造板力学性能及其检测方法进行了概述和归纳,然后对国内外人造板弹性常数和动态黏弹性振动检测研究现状作了汇总与分析,同时指出了足尺人造板力学性能振动检测已有研究存在的不足,并介绍了笔者所在课题组针对面向力学性能评估的足尺人造板振动检测研究的开展情况。足尺人造板力学性能无损检测下一步科研的目标是建立一种基于振动检测理论的面向结构用足尺人造板整板力学性能的快速、无损检测和评估的技术和方法。其研究成果可以为将来实现结构用足尺人造板实验室环境下的快捷抽检及生产线上的力学性能普检和分等奠定理论基础。
Elastic constants(modulus of elasticity and shear modulus),strength constants and dynamic viscoelasticity are three critical indicators for evaluating the mechanical performance of full-size wood composite panels(WCPs).There is,especially for full-size WCPs,a significant relationship between elastic constants and strength constants.Therefore,many researches on nondestructive testing(NDT)of mechanical properties of full-size WCPs have focused on nondestructively determining their elastic constants and dynamic viscoelasticity.This paper summarizes the mechanical properties and corresponding testing methods of WCPs,and reviews the research on the estimation of elastic constants and dynamic viscoelasticity of WCPs.Furthermore,this paper points out the existing shortcomings of the previous studies and introduces the research progress of our research team on estimating the mechanical properties of fullsize WCPs using vibration methods.Thus,the future research goal of NDT for the mechanical properties of full-size WCPs is to develop a rapid and nondestructive technique based on vibration detection theory for directly assessing the mechanical properties of the structural full-size WCPs.Results of these research are to lay a theoretical foundation for achieving fast sampling of structural full-size WCPs in the laboratory and general examination and grading of mechanical properties on the production line in the future.
作者
管成
刘晋浩
张厚江
周卢婧
Guan Cheng;Liu Jinhao;Zhang Houjiang;Zhou Lujing(School of Technology,Beijing Forestry University,Beijing100083,China;Joint International Research Institute of Wood Nondestructive Testing and Evaluation,Beijing Forestry University,Beijing100083,China;Forestry and Environment Special Equipment Research Center,Beijing Forestry University,Beijing100083,China)
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2019年第9期164-172,共9页
Journal of Beijing Forestry University
基金
中央高校基本科研业务费专项(BLX201817)
中国博士后科学基金面上资助项目(2018M641225)
林业公益性行业科研专项(201304512)
关键词
足尺人造板
力学性能
无损检测
弹性常数
动态黏弹性
full-size wood composite panel
mechanical property
nondestructive testing
elastic constant
dynamic viscoelasticity
