Article
Materials Science, Multidisciplinary
Tobias Brink, Lucas Frerot, Jean-Francois Molinari
Summary: The study proposes a simple model for adhesive wear in dry sliding conditions, which is based solely on material properties and surface parameters, without fit parameters. By explicitly tracking the sliding process, the model connects particle emission rates and sizes to the macroscopic wear rate in a meaningful way. Further controlled wear experiments and parameters from such work are needed to fully verify and enhance the model.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
R. Civiero, F. Perez-Rafols, L. Nicola
Summary: The effect of a passivation layer on a rough metal surface during contact loading is studied using dislocation dynamics simulations. The metal body is modeled as an FCC single crystal with a self-affine rough surface, which can be either bare or covered by a thin coating that is impenetrable to dislocations. The simulation allows for analyzing the influence of surface roughening caused by dislocation motion, where bare surfaces result in crystallographic steps due to dislocation glide, while passivated surfaces stop dislocations at the interface.
MECHANICS OF MATERIALS
(2023)
Article
Engineering, Chemical
Son Pham-Ba, Jean-Francois Molinari
Summary: This study developed an analytical model of adhesive wear between two unlubricated rough surfaces, examining the influence of self-affinity of surface roughness and complex morphology of micro-contacts on wear particles. By considering elastic interactions between nearby micro-contacts, a wear map was constructed to describe the instantaneous wear volume.
Article
Engineering, Civil
Junling Zheng, Yi Jin, Jiabin Dong, Shunxi Liu, Qing Zhang, Huibo Song, Pinghua Huang
Summary: The transport property of natural fissured reservoir is highly related to the fracture permeability. In this work, four controlling factors were identified for the mismatched and rough fracture flows, and a quadruple-effect permeability model was established to characterize the comprehensive effects from the composite topography of rough fractures.
JOURNAL OF HYDROLOGY
(2022)
Article
Engineering, Mechanical
Chongpu Zhai, Shuwen Zhang, Hui Ji, Deheng Wei, Hengxu Song, Kaiyuan Liu, Minglong Xu
Summary: This study quantifies the impact of surface roughness on interfacial flexoelectricity during normal compression and oscillation. Through examining 3D-printed surfaces with different roughness features, the researchers found that the flexoelectric charge follows a power-law relationship with the compression load, and the exponent is positively correlated with the fractal dimension. Contact analyses reveal that the flexoelectric charge concentrates on larger microcontacts as compression continues, and rougher surfaces show less heterogeneity in flexoelectric polarizations. This study provides experimental measurements and explanations for interfacial flexoelectricity, highlighting its connection to surface structures and suggesting new approaches for contact evaluation and flexoelectricity enhancement.
EXTREME MECHANICS LETTERS
(2023)
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, Chemical
Shijun Yin, Gianluca Costagliola, Jean-Francois Molinari
Summary: We investigate the persistence of micro-contacts between two elastic random rough surfaces using a simple model, finding that the original contact clusters gradually disappear and are replaced by new ones, while the real contact area remains constant. This study sheds light on the microscopic origins of phenomenological rate-and-state friction laws and memory effects observed in frictional sliding.
Article
Engineering, Mechanical
Wurui Ta, Suming Qiu, Yulong Wang, Jinyu Yuan, Yuanwen Gao, Youhe Zhou
Summary: The developed volumetric contact theory investigates electro-mechanical contact properties between random rough surfaces without pre-supposing a certain contact pattern. It calculates the real contact area by determining the three-dimensional equivalent contact volume, predicting the change of contact resistance with squeezing load, and emphasizing the importance of contact volume in resolving contact issues between rough surfaces. The theory provides a new perspective on understanding the electro-mechanical coupling mechanism between rough surfaces by quantifying electrical contact behavior using void and real contact volume ratio.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Engineering, Mechanical
Anahita Emami, Seyedmeysam Khaleghian, Saied Taheri
Summary: Modeling the real contact area is crucial in various tribological processes, and the accuracy of predicting friction, adhesion, and wear depends on it. Consideration of physical parameters such as surface roughness characteristics, material properties, sliding velocity, and normal load can lead to a more precise estimation of the friction coefficient.
Article
Engineering, Mechanical
Jian Chen, Di Liu, Chenglong Wang, Wangyang Zhang, Linbo Zhu
Summary: A fractal contact model was proposed to study the dynamic contact performance of engineering surfaces, considering the scale-dependence of critical contact parameters. The study found that the scale of asperities in the lowest ten grades significantly affects the contact characteristics of the entire joint surface. Changes in topography and material properties can influence the contact characteristics.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Physics, Fluids & Plasmas
Thijs de Goede, Karla de Bruin, Noushine Shahidzadeh, Daniel Bonn
Summary: This paper investigates the influence of surface roughness on droplet splashing, showing that rough surfaces can change the splashing velocity of droplets. When the droplet roughness is large enough, it changes the droplet splashing mechanism from corona to prompt splashing. The study also demonstrates that the measured splashing velocity for water and ethanol on surfaces with different roughnesses can be collapsed onto a single curve, indicating that the droplet splashing velocity on rough surfaces scales with the Ohnesorge number defined with the surface roughness length scale.
PHYSICAL REVIEW FLUIDS
(2021)
Article
Engineering, Chemical
Ziwen Zuo, Junfeng Wang, Yuanping Huo, Dongbao Wang, Hongbing Ji
Summary: The relationship between capillary force and contact surface roughness was studied by investigating the movement of the liquid column inside a slit. It was found that under homogeneous wetting, capillary force is independent of the roughness, while under heterogeneous wetting, capillary force is positively correlated with roughness.
Article
Materials Science, Multidisciplinary
B. N. J. Persson
Summary: This theory explains the contact mechanics of randomly rough surfaces by studying the interface at different levels of magnification. It takes into account the surface roughness and its impact on the distribution of contact stress and interfacial gap. The theory is versatile and can be applied to various types of solids and layered materials. Its applications include studying leakage, contact stiffness, electric and thermal contact resistance, rubber friction, adhesion, and mixed lubrication.
Article
Mathematics, Interdisciplinary Applications
Robert L. Jackson, Yang Xu, Swarna Saha, Kyle D. Schulze
Summary: This study uses the boundary element method to predict the real contact area of perfectly elastic rough surfaces, aiming to confirm the linear relationship between contact area, root-mean-square slope, and applied load predicted by fractal diffusion-based rough surface contact theory. However, experimental results reveal a complex response that deviates from the expected behavior. Further evaluation of the variation in root-mean-square slope and system spectrum related to contact features is needed to understand why this discrepancy occurs in some types of surfaces and not others.
FRACTAL AND FRACTIONAL
(2021)
Article
Chemistry, Multidisciplinary
Changgeng Zhang, Baichuan Yu, Yongjian Li, Qingxin Yang
Summary: In this paper, a simplified contact model based on fractal theory and Monte Carlo method is established to simulate the electrical contact resistance (ECR) of rough surfaces. The model overcomes the difficulty of constructing resistance networks in traditional contact models and reveals the influence of fractal parameters on surface morphology and contact characteristics. The contact resistance considering a contaminated film is calculated, providing a quantitative analysis of the change and influencing factors. The accuracy of the method is validated by comparing with experimental data and finite element results. The results show that the model has accurate calculation results for dimensionless contact load below 4 x 10(-3).
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Mechanical
G. Carbone, C. Mandriota, N. Menga
Summary: In this article, a novel theory of adhesive contact between linear viscoelastic materials and rough substrates during constant velocity sliding is presented. The closure equation to calculate the unknown contact area is rigorously formulated based on a local energy balance, despite the non-conservative behavior of the system. The results highlight three main peculiar features of the contact, which are strictly related to the interplay of adhesion and viscoelasticity.
EXTREME MECHANICS LETTERS
(2022)
Article
Mechanics
Carmine Putignano, Giuseppe Carbone
Summary: A numerical Boundary Element methodology is developed to model the indentation process of thin layers of viscoelastic materials, and numerical analyses show that finite values of the contacting layers thickness produce significant changes in the experimental results.
MECHANICS RESEARCH COMMUNICATIONS
(2022)
Article
Engineering, Mechanical
N. Menga, F. Bottiglione, G. Carbone
Summary: We studied the dynamic behavior of a lattice of bristle-like elastic elements at the interface between a rigid still substrate and a rigid sliding slab. Complex bristles dynamics occur due to interactions with the moving slab, potentially altering the overall frictional response. Three main mechanisms of friction control were identified: modulation of local friction force based on relative velocity; misalignment between local relative velocity and slab velocity due to transverse vibration; and local friction coefficient variation due to normal load on the bristle. Results show that a significant reduction in friction force opposing slab motion can be achieved, depending on interface properties and involving self-excited bristle vibration. This research suggests possible mechanisms of friction control in different practical applications.
NONLINEAR DYNAMICS
(2023)
Article
Engineering, Chemical
Carmine Putignano, Giuseppe Carbone
Summary: A numerical investigation is conducted to understand the influence of fractality on the viscoelastic dissipation when a 1D rigid rough profile indents a linear viscoelastic half-plane. The study reveals that the dominant factor in this one-dimensional case is the mean square roughness of the profile, indicating that the large scales of the rough spectrum play a significant role in determining the viscoelastic dissipation.
Article
Mathematics, Interdisciplinary Applications
Giuseppe Carbone, Ilario De Vincenzo
Summary: We present a general theory of infection spreading that overcomes the limitations of existing models and can deal with any distribution of latent times. By studying the characteristic functions of latent times probability density functions, we provide a general solution and demonstrate the feasibility of the theory through simulating the spreading of COVID-19 infection in Italy.
CHAOS SOLITONS & FRACTALS
(2022)
Article
Business
Giovanni Francesco Massari, Ilaria Giannoccaro, Giuseppe Carbone
Summary: This article investigates how the pattern of social interactions among team members influences team resilience. The study finds that teams with randomly and evenly distributed social interactions outperform teams with a scale-free pattern in complex and turbulent environments.
IEEE TRANSACTIONS ON ENGINEERING MANAGEMENT
(2023)
Article
Materials Science, Multidisciplinary
Michele Santeramo, Carmine Putignano, Georg Vorlaufer, Stefan Krenn, Giuseppe Carbone
Summary: A general methodology for solving two-dimensional steady-state viscoelastic circular contact problems has been developed. The methodology relies on a specially defined steady-state viscoelastic Green's function, which can be used for different materials and engineering systems.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Engineering, Mechanical
Simone De Carolis, Angelo Campanale, Carmine Putignano, Leonardo Soria, Giuseppe Carbone
Summary: This work proposes an output-only modal analysis (OMA) methodology for dynamically identifying microsystems. By considering the fluid-structure coupling and using modal parameter estimation (MPE) techniques, the effectiveness of the methodology is demonstrated. This approach is useful for research and analysis in MEMS sensor technologies.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Mechanical
G. Violano, L. Afferrante
Summary: In this study, an efficient multi-asperity model considering contact coupling and coalescence is proposed for modeling the elasto-plastic contact between rough interfaces. The results show that the contact area increases linearly with the applied load, and this relationship is affected by the yield strength and roughness amplitude. Additionally, the contact area is found to be independent of the high-frequency cut-off of the roughness spectrum due to plastic deformations.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Physics, Multidisciplinary
Christian Mueller, Martin H. Mueser, Giuseppe Carbone, Nicola Menga
Summary: This study investigates the impact of the coupling of normal and in-plane elastic response on the tribological properties when Hertzian or randomly rough indenters slide past an elastic body. The study finds that compressibility-induced coupling increases maximum tensile stresses and decreases friction, violating Amontons' law macroscopically.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Physical
Farideh Davoodi, Mohammad Taghian, Giuseppe Carbone, Abdollah Saboori, Luca Iuliano
Summary: Fast progress in near-net-shape production has led to increased interest in internal surface finishing. This literature review focuses on the development of non-traditional finishing methods and compares their working principles, capabilities, and limitations. A thorough assessment is conducted based on seven key features, with two selected methods determining the value for a hybrid machine.
Editorial Material
Engineering, Multidisciplinary
Stanislav N. Gorb, Giuseppe Carbone, Thomas Speck, Andreas Taubert
Article
Materials Science, Multidisciplinary
L. Afferrante, G. Violano, D. Dini
Summary: This study contributes to the debate by numerical simulations and experimental observations, revealing the crucial role of long-wavelength roughness and the influence of short-wavelength roughness on adhesion.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Proceedings Paper
Computer Science, Information Systems
Zhumadil Baigunchekov, Giuseppe Carbone, Zhadyra Zhumasheva, Bekzat Amanov, Yernar Zholdassov, Serik Tolenov, Alibek Tleukhanov
Summary: This paper solves the direct and inverse kinematics problems of the Ai-Gerim humanoid robot arm and introduces the characteristics of the robot and the methods used.
ADVANCES IN SERVICE AND INDUSTRIAL ROBOTICS, RAAD 2022
(2022)
Review
Engineering, Electrical & Electronic
Nicola Menga, Carmine Putignano, Giuseppe Carbone
Summary: This paper analyzes effective strategies proposed in recent years for tackling contact mechanics problems involving rough interfaces. It presents Boundary Element Methods as a highly accurate and computationally efficient solution to contact problems. The focus is on non-linearly elastic constitutive relations and linearly viscoelastic rheology. Possible implications include all tribological mechanical systems with contact interactions, such as seals, bearings, and dampers.
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)
