Fracture study in notched graphite specimens subjected to mixed mode I/II loading: Application of XFEM based on the cohesive zone model

被引：19
作者：
Torabi, A. R. [1 ]
Majidi, H. R. [2 ]
Ayatollahi, M. R. [2 ]
机构：
[1] Univ Tehran, Fac New Sci & Technol, Fracture Res Lab, Tehran, Iran
[2] Iran Univ Sci & Technol, Ctr Excellence Expt Solid Mech & Dynam, Sch Mech Engn, Fatigue & Fracture Res Lab, Tehran 16846, Iran
来源：
THEORETICAL AND APPLIED FRACTURE MECHANICS | 2019年 / 99卷
关键词：
Brittle fracture; Cohesive zone model (CZM); Extended finite element method (XFEM); Graphite; U-notch; Key-hole notch; Mixed mode I/II loading; BRAZILIAN DISK SPECIMENS; FINITE-ELEMENT-METHOD; KEY-HOLE NOTCHES; BRITTLE FAILURE; CRACK-GROWTH; ENRICHMENT;
D O I：
10.1016/j.tafmec.2018.11.008
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The aim of the present research is to predict the fracture load of key-hole and U-notched graphite components under mixed mode I/II loading by means of the extended finite element method (XFEM) based on the linear cohesive zone model (CZM). For this purpose, two series of fracture experiment conducted on several key-hole notched rectangular graphite plates, and also U-notched Brazilian disk graphite specimens and reported previously in the literature are presented. Then, the experimentally obtained fracture loads of the tested graphite specimens for both fracture test series are theoretically estimated by means of XFEM in combination with CZM. Since the graphite specimens have perfectly brittle behavior, the linear elastic notch fracture mechanics (LENFM) assumption is utilized. For different notch geometries, the experimental and theoretical results are plotted in the form of the variations of the fracture load versus the notch tip radius. Finally, it is shown that XFEM-CZM approach could successfully predict the experimentally obtained fracture loads of the tested specimens.
引用
收藏
页码：60 / 70
页数：11
相关论文
共 35 条
  • [1] [Anonymous], J STRUCT FLUID MECH
  • [2] [Anonymous], 1956, J APPL MECH, DOI DOI 10.1016/J.COASTALENG.2019.103560
  • [3] Ayatollahi M. R., 2017, AMIRKABIR J MECH ENG
  • [4] Predictions of fracture load, crack initiation angle, and trajectory for V-notched Brazilian disk specimens under mixed mode I/II loading with negative mode I contributions
    Bahrami, Bahador
    Ayatollahi, Majid R.
    Torabi, A. R.
    [J]. INTERNATIONAL JOURNAL OF DAMAGE MECHANICS, 2018, 27 (08) : 1173 - 1191
  • [5] Barenblatt G. I., 1962, ADV APPL MECH, V7, P55, DOI [DOI 10.1016/S0065-2156(08)70121-2, 10.1016/S0065-2156(08)70121-2]
  • [6] Bazant Z.P., 1997, Fracture and Size Effects in Concrete and Other Quasi-Brittle Materials
  • [7] Belytschko T, 1999, INT J NUMER METH ENG, V45, P601, DOI 10.1002/(SICI)1097-0207(19990620)45:5<601::AID-NME598>3.0.CO
  • [8] 2-S
  • [9] Fracture assessment of graphite V-notched and U-notched specimens by using the cohesive crack model
    Cendon, D. A.
    Torabi, A. R.
    Elices, M.
    [J]. FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, 2015, 38 (05) : 563 - 573
  • [10] The Cohesive Crack Model Applied To Notched PMMA Specimens Obeying a Non Linear Behaviour Under Torsion Loading
    Cendon, David A.
    Berto, Filippo
    Lazzarin, Paolo
    Elices, Manuel
    [J]. ADVANCES IN FRACTURE AND DAMAGE MECHANICS XII, 2014, 577-578 : 49 - +
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