Article
Chemistry, Multidisciplinary
Dongshuai Tian, Hong Zheng
Summary: This paper presents a three-dimensional version of the Mohr-Coulomb (M-C) criterion, called the Generalized Mohr-Coulomb (GMC) criterion, which considers the intermediate principal stress's effect and inherits the benefits of the original M-C criterion. The validity and accuracy of the established GMC elastoplastic model were examined using numerical simulation, and a three-dimensional tunnel excavation under various working conditions was performed to demonstrate the precision and practical significance of the GMC model's calculation results.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Civil
Iago Da Silva Santos, Diego F. B. Sarzosa, Marcelo Paredes
Summary: This work presents a framework for modeling ductile fracture and successfully predicts the onset of fracture and tearing response in pressurized metallic components. The numerical predictions are in good agreement with measured data, and detailed analyses of the strain capacity of defected pipes are performed.
THIN-WALLED STRUCTURES
(2022)
Article
Mechanics
Enkai Dai, Zhiqin Lv, Panpan Yuan, Guoqiang Liu, Ning Guo, Zhe Liu, Bingtao Tang
Summary: The modified isotropic Mohr-Coulomb fracture model and the anisotropic MMC fracture model were developed and calibrated to predict the ductile fracture behavior of QP980 steel sheet. The anisotropic fracture loci were obtained in various loading directions and the influence of plastic anisotropy on ductile fracture behavior was confirmed. The anisotropic MMC fracture model was validated through different tests, demonstrating its capability to predict ductile fracture behavior under different loading conditions.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Engineering, Mechanical
Handong Liu, Jingjing Liu, Shiying Zhang, Lingyun Feng, Lei Qiu
Summary: To understand the impact of fracture on deformation and failure of soft rock, cement mortar specimens were used to simulate soft rock. Uniaxial and triaxial compression tests were conducted to study the stress-strain relationship and failure mode of fractured soft rock with different fracture angles and connectivity. A constitutive model and Mohr-Coulomb failure criterion for soft rock were established. The results showed that fractured soft rock had lower uniaxial compressive strength compared to intact soft rock. Fracture angles had significant effects on the failure mode, while the stress-strain curves remained similar.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Engineering, Geological
Wei Gao, Xin Liu, Jie Hu, Y. T. Feng
Summary: This study introduces a novel constitutive law for the cohesive zone model to model rock fracture behavior. The proposed model is validated by simulating Brazilian, uniaxial compression, and triaxial compression tests, demonstrating its reliability and validity. Additionally, parametric studies on TBM cutter indentation cutting reveal the effects of confining stress, cutter spacing, and cutter velocity on rock fracture behavior and contact interaction.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Construction & Building Technology
Dechun Lu, Cancan Su, Xin Zhou, Guosheng Wang, Xiuli Du
Summary: A cohesion-friction combined hardening model of concrete is developed in this paper, and the yield curve is determined by test data. The influence of multiaxial stress state on concrete ductility is considered, and a stress dependent plastic internal variable is proposed. The model is implemented in ABAQUS using an open-source user-defined material subroutine, and the friction and cohesion mechanism of concrete is successfully reproduced through structural analysis.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
A. Amine Benzerga
Summary: This paper discusses the plasticity of porous materials from a fundamental standpoint. It focuses on the concept of unhomogeneous yielding, which involves the yielding and plastic flow under gradient-free macroscopically nonuniform deformation. The nonuniformity is represented by strain localization in one or more bands of finite thickness. The paper presents a general theory for the finite number of bands or yield systems, with a dependence on the resolved normal stress.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Construction & Building Technology
Shibing Huang, Zekun Xin, Yuhang Ye, Fei Liu
Summary: A novel elastoplastic model based on the Mohr-Coulomb (M-C) yield criterion is proposed to quantify frost deformation in saturated brittle porous materials during repeated freeze-thaw cycles. Experimental results on sandstone and cement pastes validate the model, showing good agreement between calculated frost strain and experimental values. The freeze-thaw deformation can be divided into four typical stages, with the introduction of a plastic parameter η to estimate residual plastic strains caused by freeze-thaw action.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Chemical
Jumpei Kawamura, Kizuku Kushimoto, Shingo Ishihara, Junya Kano
Summary: The newly developed ADEM Ductile Fracture model effectively represents the elastoplastic deformation and fracture behaviors of solid fats, matching well with experimental data obtained from compression and cutting tests.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Construction & Building Technology
Fan Shi, Dongsheng Wang, Lei Chen
Summary: This paper proposes a compatible constitutive model to accurately describe the cyclic elastoplastic behavior of stainless steel of varying strengths, and provide practical engineering calibration.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2023)
Article
Engineering, Geological
Xu Li, Guangyao Si, Chunchen Wei, Joung Oh, Ismet Canbulat
Summary: The phase-field damage theory with finite element method is used to estimate crack propagation, but calibration of the phase-field damage model is difficult. The length scale parameter is often arbitrarily determined, which may affect the accuracy of the model. This study aims to calibrate an elastoplastic phase-field damage model using ultrasonic wave velocity measurement.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2023)
Article
Automation & Control Systems
Tanakorn Jantarasricha, Komkamol Chongbunwatana, Sansot Panich
Summary: This paper presents a comparative study of multiple fracture criteria for the AA2024-T3 sheet aluminium alloy. The study aims to gain a better understanding of the fracture nature by using practical forming processes. The results show that the selected fracture criteria produce satisfactory results in terms of final drawing depth.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Mechanics
Antoine Hilhorst, Julien Leclerc, Thomas Pardoen, Pascal J. Jacques, Ludovic Noels, Van-Dung Nguyen
Summary: Cantor-type high entropy alloys are a new family of metallic alloys with a combination of high strength and high fracture toughness. An experimental study on the CoCrNi alloy was conducted to determine its damage and fracture mechanisms under different stress states, and a micromechanics-based ductile fracture model was identified and validated.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Materials Science, Multidisciplinary
Sheng-De Hu, Cong Wang, Xin-Yun Wang, Li-Xin Li, Sheng Liu
Summary: Through thermal compression tests and three-roll planetary rolling experiments, the cause of cracking in bismuth-containing austenitic stainless steel during production was determined, and key process parameters were identified. Optimal rolling process parameters were obtained through orthogonal tests and finite element simulations, and their reliability was verified by field rolling experiments.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Engineering, Mechanical
I. T. Tandogan, T. Yalcinkaya
Summary: This paper develops a physically motivated cohesive zone modeling framework for ductile fracture in metallic materials, considering the physical mechanisms of crack initiation and propagation. A micromechanically motivated traction-separation relation is used to describe the growth of a physical pore. An incremental implicit elasto-plastic numerical integration scheme is utilized for solving the mixed-mode system of equations. Numerical simulations are conducted to test the implementation and influence of micromechanical parameters on crack initiation and propagation.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Construction & Building Technology
Myung-Sung Kim, Sun-Beom Kwon, Seul-Kee Kim, Jeong-Hyeon Kim, Jae-Myung Lee
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2019)
Article
Polymer Science
Ki-Beom Park, Myung-Sung Kim, Jeong-Hyeon Kim, Seul-Kee Kim, Jae-Myung Lee
JOURNAL OF POLYMER ENGINEERING
(2019)
Article
Materials Science, Multidisciplinary
Le Thanh Hung Nguyen, Jae-Sik Hwang, Myung-Sung Kim, Jeong-Hyeon Kim, Seul-Kee Kim, Jae-Myung Lee
Article
Chemistry, Multidisciplinary
Myung-Sung Kim, Jeong-Hyeon Kim, Seul-Kee Kim, Jae-Myung Lee
APPLIED SCIENCES-BASEL
(2019)
Article
Engineering, Mechanical
Myung-Sung Kim, Jeong-Dae Kim, Jeong-Hyeon Kim, Jae-Myung Lee
Summary: Polyurethane foam (PUF) is widely used in transportation applications due to its excellent thermal insulation and impact absorption performance. In this study, the effects of repetitive low-energy impact on the mechanical behavior of glass fiber-reinforced PUF were investigated, showing a critical impact energy range for degradation. The impact performance and compressive performance of the material were significantly influenced by the repetitive impact, leading to changes in peak stress, impact duration, peak strain, and elastic modulus.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Chemistry, Multidisciplinary
Jeong-Hyeon Kim, Doo-Hwan Park, Seul-Kee Kim, Myung-Sung Kim, Jae-Myung Lee
Summary: This study investigated the ultimate strength and collapse behavior of the simply supported curved plate under a longitudinal compressive load, by conducting a series of buckling collapse experiments and elastoplastic large deflection analysis. The effects of various parameters on the behavior of the curved plates were discussed, and an empirical design formula for predicting the ultimate strength of curved plates was derived.
APPLIED SCIENCES-BASEL
(2021)
Article
Nuclear Science & Technology
Inyoung Song, Taehyun Lee, Kyungha Ryu, Yong Jin Kim, Myung Sung Kim, Jong Won Park, Ji Hyun Kim
Summary: This study investigated the effects of heat and radiation on the degradation behavior of fluoroelastomer under normal operation and severe accident conditions. The results showed that fluoroelastomer hardened more significantly in the severe accident environment and exhibited decreased thermal stability.
NUCLEAR ENGINEERING AND TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Sung-Gyu Jeon, Jeong-Hyeon Kim, Jeong-Dae Kim, Yeon-Jae Jeong, Hee-Tae Kim, Seul-Kee Kim, Jae-Myung Lee
Summary: The structural safety of the cargo containment system (CCS) is crucial for the maritime transportation of liquefied natural gas (LNG) due to its extremely low temperature. This study investigates the failure mechanism of the primary barrier of an LNG CCS through falling-object-induced structural failure tests. Impact tests were conducted, using different membrane types and impactor types, to clarify the effect of the primary barrier's failure response. Additionally, a finite element analysis-based design-aid numerical method was developed to verify the experimental observations and provide guidelines for setting safety standards.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Nanoscience & Nanotechnology
Woojoo Shin, Myungsung Kim, Taehyun Lee, Dongwoo Kang, JaeWon Shim, Yongjin Kim
Summary: In a roll-to-roll (R2R) system, the traction force of the roller is crucial for precision transportation in printed electronic devices. Increased traction force can prevent issues such as slippage, wrinkles, sagging, and air entrainment. The wrap angle, tension, and friction coefficient between the roller and the film are key factors for achieving greater traction force. This study focuses on increasing the friction coefficient on the roller surface as a means of improving traction force in R2R transport systems.
Article
Chemistry, Multidisciplinary
Yongjin Kim, Myung-Sung Kim, Hyeon-Jong Jeon, Jeong-Hyeon Kim, Kang Woo Chun
Summary: This study investigates the strain-rate-dependent mechanical performances of three different polymers, including ABS, PE, and PVDF, commonly used in ship and offshore industries under low-temperature conditions. Results show that as temperature decreases, the tensile strength and Young's modulus of the tested polymers increase, with PVDF displaying superior mechanical properties.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Chemical
Myung-Sung Kim, Taehyun Lee, Yeonhong Son, Junesung Park, Minsung Kim, Hyeonjun Eun, Jong-Won Park, Yongjin Kim
Summary: A series of material tests were conducted on cryogenic metallic materials for liquid hydrogen storage tanks. The electrochemical hydrogen-charging process had an impact on the stainless steel, causing surface cracks and a decrease in flow stress. On the other hand, the mechanical performance of the aluminum alloy improved in terms of strength and elongation. Changes in the mechanical performance were observed for all the metallic materials at both 300K and 20K.
Article
Chemistry, Multidisciplinary
Jong-Jik Lee, Yongjin Kim, Taehyun Lee, Myung-Sung Kim, Jeong-Hyeon Kim, Hyun-Jin Tak, Jong-Won Park, Dongho Oh
Summary: This study quantitatively analyzed the failure causes of pumps based on actual accident records and determined the failure modes for the core parts of the oil pump. Test infrastructures were developed to collect normal and abnormal data, and Fast Fourier Transform (FFT) and Short-Time Fourier Transform (STFT) were applied to analyze the vibration data and obtain more precise results. The constructed database with over 200 data entries is expected to assist in investigating failure diagnosis and prediction of algorithm models for ship management.
APPLIED SCIENCES-BASEL
(2023)
Review
Engineering, Marine
Myung-Sung Kim, Kang Woo Chun
Summary: This review article provides a methodology for selecting suitable metal materials for shipboard LH2 storage and piping systems based on operational requirements. It comprehensively reviews the effects of both liquid and gaseous hydrogen environments on metal materials, establishes minimum requirements for liquid hydrogen based on the standards for liquefied natural gas (LNG) storage systems, and derives evaluation items for material selection criteria in low-temperature cargo and fuel storage facilities.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Proceedings Paper
Engineering, Marine
Chi-Seung Lee, Myung-Sung Kim, Kwang-Ho Choi, Myung-Hyun Kim, Jae-Myung Lee
PROCEEDINGS OF THE ASME 34TH INTERNATIONAL CONFERENCE ON OCEAN, OFFSHORE AND ARCTIC ENGINEERING, 2015, VOL 3
(2015)
