文献类型：期刊文献

中文题名：Einfluss der Prüfverfahren und der Lithologie auf die Bestimmung der Mode I-Bruchz?higkeit von Steinen mittels empirischer Beziehungen

英文题名：Effects of test procedures and lithology on estimating the mode I fracture toughness of rocks using empirical relations

作者：Bao, H.[1];Wu, F. Q.[2];Niu, J. R.[3]

机构：[1]Changan Univ, Sch Highway, Xian 710064, Shaanxi, Peoples R China;[2]Shaoxing Univ, Coll Civil Engn, Shaoxing 312000, Zhejiang, Peoples R China;[3]Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China

年份：2018

卷号：49

期号：8

起止页码：951

外文期刊名：MATERIALWISSENSCHAFT UND WERKSTOFFTECHNIK

收录：SCI-EXPANDED(收录号：WOS:000441568800001)、、EI(收录号：20183405716446)、WOS

基金：Financial supports provided for this project by the National Natural Science Foundation of China (Grant No. 41790443) and Collaborative Innovation Center for Prevention and Control of Mountain Geological Hazards of Zhejiang Province (Grant No's. PCMGH-2016-Z-03) is gratefully acknowledged. This work is also supported by the Fundamental Research Funds for the Central Universities (Grant No. 310821171007, 310821173701).

语种：英文

外文关键词：Mode I fracture toughness; tensile strength; empirical relation; estimation method; influencing factors

外文摘要：Empirical estimation is a common method for getting mode I fracture toughness K-IC of rock. By collecting data from tests in this study and literature, 204 sets of K-IC and tensile strength sigma(t) test data are obtained for new empirical K-IC-sigma(t) relations regression. The empirical relations make the estimation of K-IC values from sigma(t) conveniently, but test procedures and lithology will influence its reasonability and reliability. Results indicate that the empirical K-IC-sigma(t) relations obtained from the four different suggested K-IC test methods are all in good but obviously different linear relationship. The analyses show that cracked chevron notch Brazilian disc specimen (CCNBD) test-based empirical relation is more accurate for estimating K-IC than the other three test-based empirical relations. As to different lithology, isotropic rocks such as sandstone and carbonatite may be more appropriate for the application of empirical estimation method. However, for coarse grained or anisotropic rocks such as granite and marble, estimation method should be applied carefully because of possibly weak K-IC-sigma(t) relations.