脆性材料I型(张开)-断裂韧性测定的PFC2D和试验研究:一种新方法

作     者：付金伟 Hadi Haeri Joseph FLabuz Vahab Sarfarazi Pouyan Ebneabbasi MRM Aliha Hamid Reza Karimi Shirin Jahanmiri Mohammad Fatehi Marji Jinwei Fu;Hadi Haeri;Joseph FLabuz;Vahab Sarfarazi;Pouyan Ebneabbasi;MRM Aliha;Hamid Reza Karimi;Shirin Jahanmiri;Mohammad Fatehi Marji

作者机构：School of Civil Engineering and TransportationNorth China University of Water Resources and Electric PowerZhengzhou450046China Department of Mining EngineeringHigher Education Complex of ZarandShahid Bahonar University of KermanKermanIran Department of CivilEnvironmentaland Geo-EngineeringUniversity of MinnesotaMinneapolis55455USA Department of Mining EngineeringHamedan University of TechnologyHamedanIran Research ScholarCivil Engineering DepartmentIslamic Azad UniversityHamedanIran Welding and Joining Research CenterSchool of Industrial EngineeringIran University of Science and TechnologyNarmakTehranIran School of Civil EngineeringIran University of Science and Technology(IUST)NarmakTehranIran Department of Mine Exploitation EngineeringFaculty of Mining and MetallurgyInstitute of EngineeringYazd UniversityYazdIran 

出 版 物：《Acta Mechanica Sinica》 (力学学报（英文版）)

年 卷 期：2024年第40卷第2期

页      面：116-130页

核心收录：

学科分类：08[工学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：the National Natural Science Foundation of China(Grant No.51608117) High Foreign Country Expert Project in Henan Province(Grant No.HNGD2022040) 

主　　题：断裂韧性 脆性材料 实用公式 拉伸应力 巴西圆盘 离散元分析 相变 归一化 

摘      要：在本文研究中,通过利用优势边缘缺口盘型(END)试样,确定了石灰石的断裂韧性,提出了一种新的石灰石归一化相应力、高相变的计算方法.采用柔性有限元法(FEM)对试样的I型(张开)-断裂韧性进行了精确计算,并得到了相应实用公式.在试验中,还使用含缺口巴西圆盘(NBD)试件,测试了END程序的准确性.为了在数值上重现这些测试并验证断裂韧性测量的正确性,还对END测试进行了离散元分析.数值模拟结果与实验结果吻合良好.然而,END研究所确定的韧性水平低于NBD测试规定的韧性水平,这是因为END石灰石样品中的缺口具有均匀的拉伸应力分布.