文献类型：期刊文献

英文题名：Thermal Damage Impact on Negative Poisson's Ratio of Granite Under Brazilian Tensile Loading

作者：Wang, Tianzuo[1];Wang, Jisha[1];Xue, Fei[1];Huang, Xiaolin[2];Lin, Zhongqin[3];Liang, Zhu[4]

机构：[1]Shaoxing Univ, Sch Civil Engn, Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing, Peoples R China;[2]Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Dept Civil Engn, Xian, Peoples R China;[3]Fuzhou Univ, Coll Civil Engn, Fuzhou, Peoples R China;[4]Guangzhou Urban Planning & Design Survey Res Inst, Guangzhou, Peoples R China

年份：2025

外文期刊名：FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES

收录：SCI-EXPANDED(收录号：WOS:001406221900001)、、EI(收录号：20250417756049)、Scopus(收录号：2-s2.0-86000429717)、WOS

基金：The authors would like to acknowledge the financial support provided by the Zhejiang Provincial Natural Science Foundation of China (No. LGJ22D020001), the National Natural Science Foundation of China (Nos. 52104094 and 42272333), the China Postdoctoral Science Foundation (No. 2022M721997), and the Guangdong Enterprise Key Laboratory for Urban Sensing, Monitoring and Early Warning (No. 2020B121202019). And many thanks to Dr. Li Zheng for his help and guidance in data analysis.

语种：英文

外文关键词：fracture mechanism; granite; negative Poisson's ratio effect; tensile mechanical behavior; thermal damage

外文摘要：This study investigates the effects of thermal damage on the tensile behavior of granite during Brazilian splitting tests, focusing on the negative Poisson's ratio (NPR) effect. Using digital image correlation and acoustic emission techniques, the research reveals that increasing thermal damage from 25 degrees C to 800 degrees C reduces granite tensile strength by up to 85.7% and induces a brittle-to-ductile transition. The NPR effect emerges, intensifies, and subsequently disappears as temperature increases, significantly altering stress distribution and deformation patterns. Local contraction zones created by the NPR effect can lead to overestimation of tensile strength in thermally damaged rock. Acoustic emission monitoring demonstrates a strong correlation between the NPR effect and microcrack development. These findings advance the understanding of rock mechanical behavior under thermal damage and provide practical insights for tensile strength evaluation in high-temperature geological settings, such as deep underground energy development and nuclear waste disposal.