首页|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

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

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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.
Determination of mode Ⅰ fracture toughness of brittle materials with a new method
In this work,the fracture toughness of limestone was determined utilizing advantage edge-notched disc(END)type specimens.The normalized Phase Ⅰ stress high transformational of limestone was calculated using a novel method.The samples'Mode Ⅰ(opening)-fracture toughness was accurately calculated using the flexible finite element method(FEM)to develop this helpful formula.The notched Brazilian discs(NBD)were used in a lab experiment to test the accuracy of the END procedure.To recreate these tests numerically and verify the correctness of the fracture toughness measurements,a discrete element analysis of the END tests was also performed.The findings of the numerical simulations and the fracture extension patterns derived from the experimental testing showed excellent agreement.The toughness levels determined by END studies,however,were less than those specified by NBD testing.This is because the notch in the END limestone sample has a uniform tensile stress distribution.

FEMMode Ⅰ(opening)-fracture toughnessEdge-notched discLimestone

付金伟、Hadi Haeri、Joseph F.Labuz、Vahab Sarfarazi、Pouyan Ebneabbasi、MRM Aliha、Hamid Reza Karimi、Shirin Jahanmiri、Mohammad Fatehi Marji

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School of Civil Engineering and Transportation,North China University of Water Resources and Electric Power,Zhengzhou 450046,China

Department of Mining Engineering,Higher Education Complex of Zarand,Shahid Bahonar University of Kerman,Kerman,Iran

Department of Civil Environmental,and Geo-Engineering,University of Minnesota,Minneapolis 55455,USA

Department of Mining Engineering,Hamedan University of Technology Hamedan,Iran

Research Scholar,Civil Engineering Department,Islamic Azad University,Hamedan,Iran

Welding and Joining Research Center,School of Industrial Engineering,Iran University of Science and Technology Narmak,Tehran,Iran

School of Civil Engineering,Iran University of Science and Technology(IUST),Narmak,Tehran,Iran

Department of Mine Exploitation Engineering,Faculty of Mining and Metallurgy,Institute of Engineering,Yazd University,Yazd,Iran

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FEM Mode Ⅰ(opening)-fracture toughness Edge-notched disc Limestone

国家自然科学基金High Foreign Country Expert Project in Henan Province

51608117HNGD2022040

2024

10.1007/s10409-023-23236-x

力学学报(英文版)

力学学报(英文版)

CSTPCD
影响因子：0.363
ISSN：0567-7718
年,卷(期)：2024.40(2)
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