Article
Chemistry, Physical
Wangyang Zhang, Jian Chen, Chenglong Wang, Di Liu, Linbo Zhu
Summary: This paper investigates the flattening contact behavior of an elastic-perfectly plastic hemisphere pressed by a rigid plane using the finite element method. The study compares and analyzes the behavior influenced by different elastic moduli, Poisson's ratios, and yield strengths in a wide range of interference values. The study proposes a new elastic-plastic constitutive model to predict the contact area and load in the elastic-plastic range and verifies its rationality compared to previous models and experiments.
Article
Engineering, Mechanical
Shuo Liu, Guodong Fang, Maoqing Fu, Xiangqiao Yan, Songhe Meng, Jun Liang
Summary: An element-based peridynamics (EBPD) and finite element method (FEM) coupling model is proposed for solving elastic-plastic deformation and failure problems, with the use of non-local stress and strain concepts to describe material properties and improve computational efficiency.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Mechanics
Guanhua Sun, Qi Yi, Yinghao Sun, Jiao Wang
Summary: This paper introduces the Goodman contact element based on the virtual element method framework. By adding nodes to the contact element, the limitation of mesh matching is overcome, and practical problems in geotechnical engineering can be solved. The virtual element method is applied to derive the elastoplastic equations and calculate the Goodman contact stiffness matrix. Numerical examples are provided to study mesh distortion sensitivity, shape sensitivity, convergence, and frictional and elastic-plastic contact cases. The contact force between soil and wall in a gravity retaining wall with non-matching mesh is also presented.
ARCHIVE OF APPLIED MECHANICS
(2023)
Article
Engineering, Civil
Zongyuan Zou, Doudou Liu, Chunyan Song, Miao Jin, Baofeng Guo, Hongsheng Zhang
Summary: This paper proposes a new numerical method for the lower bound shakedown analysis that takes into account limited kinematic hardening, geometric effect, and deformation.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2022)
Article
Engineering, Mechanical
Simon Roa, Martin Sirena
Summary: The study conducted systematic finite element analysis of conical indentation in various isotropic elastic-plastic bulk solids, and found a linear relationship between the indentation hardness-to-reduced elastic modulus ratio and the elastic-to-total strain energy ratio, with the proportionality constant mainly influenced by the material's Poisson's ratio and cone semi-angle. Analytical equations were proposed to calculate the hardness and elastic modulus parameters independently of the indenter contact area, offering a potential solution to simplify data analysis and reduce uncertainties associated with plastic deformation phenomena.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Mechanics
Sihe Wang, Weike Yuan, Xuanming Liang, Gangfeng Wang
Summary: This paper presents an analytical contact model for elastic or elastic-perfectly plastic Gaussian rough surfaces and validates it with finite element simulations. The model accurately predicts the contact behavior, showing good agreement with the simulation results. Additionally, the influence of plastic deformation on the contact response is characterized by introducing a dimensionless plasticity parameter.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2022)
Article
Engineering, Multidisciplinary
Ming Fang, Jian Wang, Hui Li
Summary: The article introduces an adaptive model order reduction (AMOR) method for nonlinear seismic analysis to achieve higher computational efficiency by partitioning structures into linear and nonlinear substructures and using simplified governing equations. Compared to traditional time step integration methods, AMOR yields comparable results with higher efficiency.
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
(2021)
Article
Engineering, Mechanical
Zhaoning Sun, Xiaohai Li
Summary: This study investigates a finite element analysis of a rigid sphere contact with a deformable elastic-plastic plat using an indentation model. The differences between the indentation model and flattening model in terms of contact parameters are compared and analyzed. The effects of plasticity index on rough surface contact parameters are also examined.
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2022)
Article
Engineering, Biomedical
Luca Ciriello, Francesca Berti, Luigi La Barbera, Tomaso Villa, Giancarlo Pennati
Summary: This study aims to increase awareness in the field of spinal fixation modeling by investigating the mechanical response of the Interconnection Mechanism (IM). The results highlight the key role of the IM in the reliable modeling of spinal fixation.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2022)
Article
Engineering, Mechanical
A. Megalingam, K. S. Hanumanth Ramji
Summary: This study modeled and analyzed the contact of deformable spherical asperity with a rigid flat using finite element method, finding that the elastic, elastoplastic, and plastic contact states are highly influenced by the E/Y ratio and strain hardening rate. The dimensionless contact radius is insufficient to explore the combined effect of material properties.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2021)
Article
Engineering, Mechanical
Yang Liu, Liqin Qian, Jiayan Zou, Chengyu Xia, Zhanghua Lian
Summary: This study investigates the mechanical behavior and sealing performance of rubber materials used in a compression packer. Through experiments and analysis, it is found that the contact deformation of the rubber cylinder accelerates over time, and excessive stress can lead to compression and fatigue failure of the upper rubber cylinder. The contact sealing performance of the expanded rubber cylinder is studied under different radius clearance and pressure difference, and it is determined that adjusting these parameters ensures a safe working state and good sealing performance of the rubber cylinder.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Mechanics
A. K. Dwivedi, I. A. Khan, J. Chattopadhyay
Summary: This study numerically models the mechanism of ductile fracture in an elastic-plastic solid containing two populations of pre-existing voids. The influence of microstructural attributes on the mode of void coalescence and final failure is illustrated, and the mesoscopic ductility is examined and compared with experimental results.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Mechanics
Hemant J. Rathod, Umair Bin Asim, Miladin Radovic, Ankit Srivastava
Summary: Bimetallic layered composites with ultrathin layers exhibit high strength, hardness, shock resistance, and radiation damage tolerance. Deformation localization and kink-band formation are observed under layer parallel compression. Finite element analyses reveal that layer refinement and strength differential between constituent materials can trigger kink-banding, even without elastically stiff layers or geometrical imperfections.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Chen Sun, Qianling Lin, Bo Wang, Jiaxin Huang, Jubing Chen
Summary: In this study, an inverse identification method is developed to characterize the elastic-plastic contact in indentation problem. The method utilizes a discrete interfacial stress model and an alternative optimization scheme to model and identify the contact parameters accurately.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2022)
Article
Thermodynamics
Samir Danouni, Shayfull Zamree Abd Rahim, Abdellah Abdellah El-hadj, Mohd Nasir Mat Saad
Summary: This study presents the development of a thermo-mechanical simulation model for an elastic-plastic contact problem. The results showed significant effects of thermal consideration in the elastic-plastic contact problem.
Article
Engineering, Mechanical
Busra Duran, Jerome Cavoret, David Philippon, Fabrice Ville, Arnaud Ruellan, Frank Berens
Summary: This study analyzes the changes in the physicochemical properties and tribological performances of gear transmission oils during field operation, finding differences from traditional engine oils.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Baocheng Liu, Hongsheng Chen, Jun Zhou, Jing Wang, Wenxian Wang, Xiaochun Chen, Sanxiao Xi
Summary: This study used fast hot pressing sintering to fabricate WC/AlCoCrFeNi2.1 metal matrix composites (MMCs). It was found that the addition of reinforced particles increased the microhardness, nanoindentation and wear resistance of the MMCs. During frictional processes, an oxide film formed, providing material protection, enhancing stability and reducing friction-induced losses.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Pradip Kumar Verma, Alok Singh
Summary: This study investigates the mechanical properties and wear resistance of CoMoMnNiV high entropy alloy reinforced aluminium matrix composite processed through stir-squeeze casting assisted with an ultrasonic transducer. The results show significant improvements in mechanical properties and wear resistance, with the composite containing 8 wt% HEA demonstrating the highest resistance to wear. Optical microscopy, SEM, and an optical profilometer were used for a thorough examination of the microstructure and worn surface.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Zhenghai Yang, Yingjian Song, Jinlong Jiao, Wenbo Li, Bao Shangguan, Yongzhen Zhang
Summary: This study investigated the friction, wear properties, and current-carrying properties of copper-graphite composites paired with brass C28000. The results showed that the current-carrying properties of the composite materials were excellent, but their wear rate was the main limiting factor. Furthermore, an increase in the thickness of the graphite layer led to an improvement in the uniformity of damage.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Moustafa Mahmoud Yousry Zaghloul, Karen Steel, Martin Veidt, Michael T. Heitzmann
Summary: This research evaluates and compares the impact of different material types on the tribological characteristics of Polyamide 6 composites, and finds that glass fiber-reinforced Polyamide 6 exhibits better friction and wear performance under high-pressure velocity factors.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Shaoqing Qin, Lida Zhu
Summary: In this paper, the surface and subsurface damage of laser assisted grinding CrCoNi medium entropy alloys were investigated using molecular dynamics simulations. The results showed that the application of laser energy can reduce cutting forces and minimize subsurface damage.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Kaikui Zheng, Youxi Lin, Tingzheng Lai, Chenghui Gao, Ming Liu, Zhiying Ren
Summary: The study investigated the use of waste foundry resin-bonded sand as a substitute for copper in resin-based brake material. It found that the waste sand was more favorable for improving the overall friction and wear properties of the material compared to copper. Waste sand benefited the material by forming a friction layer, leading to increased friction coefficient and stability. Brake material with 10-15% waste sand showed excellent heat-fade resistance.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Dayang Li, Fanhao Zhou, Yutong Gao, Kun Yang, Huimin Gao
Summary: This article introduces a continuous prediction model based on deep learning for predicting the power output of steam turbines. The model uses long short term memory (LSTM) method to develop a trend prediction model and optimizes the prediction model through feature selection method. Experimental results show that the model outperforms other models in terms of prediction performance.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Tomohiro Toyoda, Ryo Yasuike, Toshihiro Noda
Summary: In this study, a elasto-plastic constitutive model of friction incorporating the concept of superloading surface was developed based on the subloading friction model. The proposed model achieves a smooth transition of friction by describing the evolution rule of structure, treating the state with static friction coefficient larger than kinetic friction coefficient as the bulkiness of structure. The positive definiteness of the plastic multiplier, loading condition, and material parameters were derived, and the validity of the proposed model in accordance with the subloading-friction model was confirmed through a stick-slip simulation of a mass-spring system.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
P. Balaji, B. Surya Rajan, K. Sathickbasha, P. Baskara Sethupathi, Deviga Magadevan
Summary: This study emphasizes the importance of using a variety of solid lubricants with different oxidation temperature regimes to enhance the tribological performance of brake pads.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Jian Ma, Yancong Liu, Javad Mostaghimi, Na Zhang
Summary: This paper investigates the influence of preparation strategies on the lubrication properties of surface textures. Three laser scanning strategies are proposed to achieve a sinusoidal textured surface, and the evolution of surface structure and chemical composition is discussed. The findings show that ridge structures enhance anti-wear properties but also increase the friction coefficient. However, the oil cover preparation method prevents the formation of ridges and improves wettability.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Mohammad Roostaei, Arvin Taghizadeh Tabrizi, Hossein Aghajani
Summary: In this research, the Al2O3/MoS2 nanocomposite coating layer was successfully applied on the surface of Ti-6Al-4 V alloy. The relation between the surface characteristics and wear resistance of the coating was studied using atomic force microscopy analysis and pin-on-disk wear test method. The results showed that the nanocomposite coating significantly reduced the wear rate and provided an equation to calculate the Lancaster coefficient.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Musa Bilgin, Sener Karabulut, Halil Karakoc, Yunus Kayir, Murat Sarikaya
Summary: This study investigates various methods to improve the machinability efficiency of Inconel 718 alloy while considering their effect on microstructural properties. The results show that hot+PMQL, hot+SiCNMQL, and hot+Al2O3-NMQL contribute significantly to the improvement of machinability characteristics. The EBSD analysis also reveals that a limited area is affected by heat in the hot machining environment and that the removal of the heated layer during milling process helps preserve the microstructure.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Q. Gao, Y. Fan, Y. G. Wu, J. L. Liu, J. Wang, L. Li
Summary: Fretting wear significantly affects the hysteresis behavior of the contact surface and leads to joint degradation. This study investigates the influence of harmonic normal force on the evolution of interface morphology and contact parameters with fretting wear. The results show that the harmonic normal force can significantly influence the hysteresis loop and the energy dissipation distribution on the contact surface.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Benjamin Weiland, Floriane Leclinche, Anis Kaci, Brigitte Camillieri, Betty Lemaire-Semail, Marie -Ange Bueno
Summary: This study presents a systematic approach to generating control signals for a tactile simulator that simulate the touch of textile fabrics. By using a friction modulation tactile surface and acquiring forces from real surfaces with artificial finger mimicking fingerprints, control signals are generated and processed in the frequency domain before sending them to the tactile stimulator. The study focuses on the potential benefits of incorporating fingerprint information in fabric simulations to achieve a more realistic tactile perception. A sensory analysis with 36 participants using the generated control signals showed better discrimination without fingerprint information.
TRIBOLOGY INTERNATIONAL
(2024)