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, Q.[1,2]

机构：[1] School of Civil Engineering, Xi'An University of Architecture and Technology, Shaanxi, Xi'an, 710055, China; [2] Key Lab of Structure Engineering and Earthquake Resistance, Ministry of Education [XAUAT], Shaanxi, Xi'an, 710055, China; [3] Zhengzhou Kangqiao Real Estate Development Co., Ltd, Henan, Zhengzhou, 450000, China; [4] Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing, 100091, China

年份：2021

卷号：76

期号：1

起止页码：68-76

外文期刊名：Holzforschung

收录：EI(收录号：20214711203935);Scopus(收录号：2-s2.0-85119456873)

基金：Research funding: 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：Bending strength - Cellulose - Chemical analysis - Decay (organic) - Degradation - Forecasting - Regression analysis - Scanning electron microscopy - Tensile strength

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. ? 2021 Walter de Gruyter GmbH, Berlin/Boston.