Article
Mechanics
Cungen Wang, Shuhong Wang
Summary: This study modified the generalized maximum tangential stress criterion by considering parallel and perpendicular nonsingular stresses, successfully simulating open and closed crack propagation and modeling. The simulation results were in good agreement with experimental data.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Engineering, Mechanical
Wen Hua, Zhanyuan Zhu, Wenyu Zhang, Jianxiong Li, Jiuzhou Huang, Shiming Dong
Summary: Accurate assessment and prediction of fracture behavior in cracked materials using mixed mode fracture criteria are crucial in fracture mechanics. This study comprehensively reviewed modified fracture criteria that incorporate T-stress for mixed mode I-II cracks. A comparative analysis was conducted between experimental results and theoretical predictions for five different cracked configurations. The study also discussed the effect of T-stress on crack initiation angle and fracture toughness, providing suggestions. The results showed variations in predictive accuracy across different cracked configurations due to disparities in T-stress. However, similar predictions were observed for semi-circular bend and edge-crack triangular specimens due to their similar biaxial stress ratio B. Different fracture criteria were suitable for different cracked configurations with positive or negative T-stresses.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2024)
Article
Mechanics
Jianfeng Yang, Haojie Lian, Li Li
Summary: The study reveals that CO2 saturation has a significant impact on the fracture toughness of coal, with an increase in CO2 saturation pressure resulting in a gradual decrease in fracture toughness. On the other hand, increasing confining pressure leads to higher fracture toughness in coal, with linear and quadratic relationships observed for mode I and mode II loading, respectively. Additionally, the fracture toughness decreases more rapidly under supercritical CO2 saturation confining pressure compared to N2 saturation confining pressure, and the modified maximum tangential stress criterion shows better compliance with experimental results than the traditional maximum tangential stress criterion.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Materials Science, Multidisciplinary
Wanying Du, Baoshuai Han, Xuewen Li, Hao Wu, Kesong Miao, Rengeng Li, He Wu, Chenglu Liu, Wenbin Fang, Guohua Fan
Summary: In this study, the fracture toughness of the Ti2AlNb/Ti6Al4V layered metal composite prepared by vacuum hot pressing was tested, and the fracture mechanism was investigated through in-situ fracture mechanics process. The results showed that the composite had a KIC value of 70 MPa·m1/2, which was more than twice higher than that of Ti2AlNb alloy. The presence of layered structure, tough Ti6Al4V layer, and interface layer contributed to the complex crack propagation and significant improvement in fracture toughness of the composite.
Article
Chemistry, Physical
Xin Chen, Wei Gao, Shuangshuang Ge, Cong Zhou
Summary: The interfacial fracture of rock joints is an important issue in jointed rock engineering that is often overlooked. This study proposes an interface crack model and establishes an interface fracture criterion considering T-stress. The proposed criterion is verified through laboratory and numerical tests, and the effects of α, φ, and c on the initiation of interface cracks are comprehensively discussed.
Article
Metallurgy & Metallurgical Engineering
Qiu-hong Wu, Cheng-long Xie, You-sheng Xie, Yan-lin Zhao, Xue-feng Li, Jie Liu, Lei Weng
Summary: The present study investigates the fracture toughness determination of rock materials using the asymmetric semi-circular bend (ASCB) specimens. A series of fracture tests were conducted on granite ASCB specimens, analyzing the fracture initiation, crack initiation angle, and crack propagating trajectory through various criteria. The influence of crack length on mode I/II fracture toughness was studied, and the comparison between experimental results and predicted fracture toughness ratios was conducted. The relationship between experimentally determined crack initiation angles and curves of the generalized maximum tangential stress (GMTS) criterion was obtained. The fracture process was recorded using a high-speed camera, and the shortcomings of ASCB specimens for fracture toughness determination of rock materials were discussed. The results provide a reference for analyzing mixed mode I and II fracture behavior of brittle materials.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Engineering, Environmental
Yiheng Zhang, Qing Wang, Duanfeng Han, Jiabao Li, Chunyang Wang
Summary: The fracture toughness of granular freshwater ice, including mixed mode and mode II fracture toughness, was investigated using the semi-circular bend method in this study. The experimental results showed that the fracture toughness values generally decreased slowly with increasing grain size. The use of the generalized maximum tangential stress criteria provided a better understanding of the fracture toughness of ice specimens under mixed mode loading conditions.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Can Wang, Kyvia Pereira, Dagang Wang, Aleksandr Zinovev, Dmitry Terentyev, Magd Abdel Wahab
Summary: In this paper, a numerical crack growth analysis is conducted using the MTS criterion and its extension, taking into account the contact stress between the crack surfaces. The focus is mainly on the influence of loading phase difference (f) on crack propagation behavior in fretting fatigue. The effect of initiation characteristics, including crack initiation position and direction, is studied using LEFM theory, and it is found that the predicted crack path and lifetime match well with experimental results.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Mechanical
Mengdi Jia, Zhimin Wu, Xiaoyan Han, Hong Chen, Rena C. Yu
Summary: The critical crack propagation length is crucial for calculating the fracture toughness of concrete and evaluating the safety of cracked concrete structures. This study measured the critical crack propagation lengths of notched three-point bending beams with different geometric dimensions and concrete strength grades using two experimental methods. A modified analytical method was also proposed to accurately determine the critical crack propagation length and derive the fracture toughness of concrete.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Energy & Fuels
Debanjan Guha Roy, T. N. Singh
Summary: This paper investigates the relationship between the strength properties and fracture toughness of Dholpur sandstone at elevated temperatures. The study identifies a suitable brittleness index and examines the stress-strain behavior, degradation degree, peak strain, and porosity values to evaluate the brittle-ductile transition of the rock. The results show the exponential relationship of fracture toughness with Young's modulus, tensile strength, and brittleness index, and suggest a potential transition temperature for Dholpur sandstone.
GEOMECHANICS FOR ENERGY AND THE ENVIRONMENT
(2023)
Article
Engineering, Mechanical
A. R. Torabi, E. Pirhadi
Summary: In this study, two different test specimens, rectangular tension (RT) and semi-circular bend (SCB), weakened by U-notches of different notch tip radii and made of E-glass/epoxy composite laminates with different lay-up configurations, were considered for measuring the translaminar notch fracture toughness (TLNFT) under pure mode I loading conditions. Two new closed-form expressions were proposed for TLNFT estimation based on the maximum tangential stress (MTS) and mean stress (MS) criteria, as well as the virtual isotropic material concept (VIMC). It was found that both criteria provided accurate estimates, with the MTS criterion being preferred for mechanical design of notched E-glass/epoxy composite structures.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Construction & Building Technology
Tengfei Guo, Kewei Liu, Sizhou Ma, Jiacai Yang, Xiang Li, Kefan Zhou, Tao Qiu
Summary: The behavior of initiation and propagation of interface cracks under impact is of great importance in evaluating the stability of rock-concrete systems and other layered structures. Dynamic tests were performed on bi-material cracked specimens and the fracture processes were monitored. The effects of impact angle, concrete strength, and strain rate on the fracture behavior were investigated. The results showed different fracture types and behaviors under different conditions, and the loading rate also affected the crack growth and propagation.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Materials Science, Composites
Liu Liu, Feng Li, Xin Wang, Jingyang Zhou, Mengdie Liang, Leizhi Zhang, Huang Huang, Zhishen Wu
Summary: This study investigates the fatigue damage propagation of basalt FRP laminate under coupling of acidic environment and fatigue load. The results show that fatigue weakens the interlaminar properties and reduces fiber bridging. Especially for acid fatigue, the laminate is more susceptible to damage due to the coupling effect of fatigue and acid corrosion.
POLYMER COMPOSITES
(2023)
Article
Mechanics
Yanhua Zhao, Yang Liu, Bohan Xu
Summary: The fracture behavior of concrete can be accurately described using the R-curve approach, which incorporates parameters such as fracture energy and equivalent crack extension to predict crack propagation. The proposed R-curve method successfully accounts for the influence of concrete aggregate and is validated through testing on concrete beams.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Engineering, Mechanical
Longbang Qing, Guorui Cao, Junfeng Guan, Shuguang Li
Summary: A new method was proposed to determine the mixed mode fracture toughness of concrete, which showed that KI+II values increase with specimen size and decrease with maximum aggregate size. The use of crack deflection resulted in higher KI+II values, and a monotonic loading process was sufficient for determining KI+II.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
M. M. Mirsayar, P. Park
MATERIALS & DESIGN
(2015)
Article
Materials Science, Multidisciplinary
M. M. Mirsayar
MATERIALS & DESIGN
(2015)
Article
Mechanics
M. M. Mirsayar, F. Berto, M. R. M. Aliha, P. Park
ENGINEERING FRACTURE MECHANICS
(2016)
Article
Engineering, Biomedical
M. M. Mirsayar, P. Park
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2016)
Article
Engineering, Mechanical
M. M. Mirsayar, P. Park
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2016)
Article
Engineering, Civil
M. M. Mirsayar, Kaijian Huang, Dan G. Zollinger
TRANSPORTATION RESEARCH RECORD
(2016)
Article
Mechanics
M. M. Mirsayar
ENGINEERING FRACTURE MECHANICS
(2017)
Article
Mechanics
M. M. Mirsayar, V. A. Joneidi, R. V. V. Petrescu, F. I. T. Petrescu, F. Berto
ENGINEERING FRACTURE MECHANICS
(2017)
Article
Engineering, Mechanical
M. M. Mirsayar, A. Razmi, F. Berto
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2018)
Article
Engineering, Mechanical
M. M. Mirsayar
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2018)
Article
Materials Science, Multidisciplinary
Ali Reza Torabi, Behnam Shahbazian, Mirmilad Mirsayar, Sergio Cicero
Summary: The determination of ductile failure behavior in engineering components weakened by cracks and notches relies heavily on estimating the plastic zone size, particularly the effective plastic zone size. This study proposed a methodology for determining the PZS around blunt V-notches subjected to mixed mode loading and plane-stress conditions. Elastic-plastic finite element analyses were conducted to verify the proposed methodology.
Article
Chemistry, Multidisciplinary
Mohammad Reza Mohammad Aliha, Hadi Ghesmati Kucheki, Mirmilad Mirsayar
Summary: A novel test configuration called adhesive short bend beam specimen was utilized to study the cracking behavior of adhesive bounded joints in this research. The results showed that the specimen is a good candidate for investigating the mixed mode I/II fracture behavior of adhesive bounded joints due to its sensitivity to different adhesive and adherent types.
APPLIED SCIENCES-BASEL
(2021)
Article
Construction & Building Technology
A. Razmi, M. M. Mirsayar
CONSTRUCTION AND BUILDING MATERIALS
(2017)
Article
Materials Science, Multidisciplinary
A. T. Samaei, M. R. M. Aliha, M. M. Mirsayar
MATERIALS PHYSICS AND MECHANICS
(2015)
