文献类型：期刊文献

英文题名：Prediction model based on chemical composition change for the mechanical degradation of Korean pine (Pinus koraiensis) after brown-rot fungi (Gloeophyllum trabeum) invasion

作者：Zhang, Lipeng[1,2] Xie, Qifang[1,2] Yang, Liujie[3] Wu, Yajie[1,2] Ma, Xingxia[4]

第一作者：Zhang, Lipeng

通信作者：Xie, QF[1];Xie, QF[2]

机构：[1]Xian Univ Architecture & Technol, Sch Civil Engn, Xian 710055, Shaanxi, Peoples R China;[2]Minist Educ XAUAT, Key Lab Struct Engn & Earthquake Resistance, Xian 710055, Shaanxi, Peoples R China;[3]Zhengzhou Kangqiao Real Estate Dev Co Ltd, Zhengzhou 450000, Henan, Peoples R China;[4]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China

年份：2022

卷号：76

期号：1

起止页码：68-76

外文期刊名：HOLZFORSCHUNG

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000737401100001)】；

基金：The authors gratefully acknowledge the funding support received from the National Natural Science Foundation of China (grant no. 51878550 & 31971588) and the Shaanxi Natural Science Basic Research Program (grant no. 2021JC-44).

语种：英文

外文关键词：brown-rot decay; chemical components; Korean pine; mechanical degradation; microscopic structures

摘要：In order to predict the mechanical properties of Korean pine after brown-rot decay based on its chemical composition change, 252 samples were prepared and exposed to a 14-week accelerated laboratory decay test using the brown-rot fungus Gloeophyllum trabeum. The mass loss, parallel-to-grain compressive strength, parallel-to-grain tensile strength and bending strengths were tested. Then chemical components and scanning electron micrograph analysis were conducted every two weeks. Results indicated that the mass loss rates of the samples increased with the increasing decay time and were negatively correlated with the sample volume. The strength loss rates were positively correlated with the decay time and mass loss rates. After 14 weeks the average strength loss rates of the parallel-to-grain compressive, tensile and bending samples reached 32%, 41% and 41%, respectively. Strengths degradation was found sensitive to the change of cellulose and hemicellulose contents. Further, mathematical regression models were proposed based on the content changes of the cellulose and hemicellulose to quantitatively predict the degradation of the strengths of Korean pine after brown-rot decay.