bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on membrane stress of diaphragm compressors based on bidirectional fluid-structure interaction
Authors: Hou Wenlong , Bao Jiahan , Chen Huaixu 
Published: February 2025

Abstract
Currently, in the analysis of the stress distribution on the diaphragm of a diaphragm compressor, a static analysis method is employed, assuming that the pressure on the diaphragm is uniformly distributed, which does not reflect reality. To investigate the impact of pressure distribution on diaphragm stress, a bidirectional fluid-structure interaction method is used, combined with User-Defined Functions (UDF) and dynamic mesh techniques. This method establishes a simulation model that fully simulates the compression, discharge, expansion, and suction phases of the diaphragm compressor. The pressures on the upper and lower surfaces of the diaphragm are applied to determine the maximum stress, which is then compared with the stress under uniform pressure. The results show that the pressure distribution on the diaphragm is uneven, and the maximum stress of the diaphragm calculated by the bidirectional fluid-structure interaction method is 12.73 MPa higher than that of the static analysis method. The uniform distribution pressure is used to analyze the strength and life reliability of the diaphragm, which is not high.
Study on influence of stirring intensity on the flow characteristics of solid-liquid phases in flotation machine
Authors: Liu Yangyang , Wang Xuetao , Wang Yulian 
Published: February 2025

Abstract
The internal flow field characteristics of the KYF flotation machine with a U tank of 50 L for solid-liquid two phases are numerically simulated by using the standard k-e turbulence model and discrete particle model based on the validation of the LDV measurement. The results show that the flow field in the flotation machine is distributed into two cycles up and down, and the fluid velocity in the separating zone is lower than that of the stirring zone. The pressure on the rotor and stator increases with the stirring intensity. Furthermore, the maximum surface pressure on the stator is higher than that on the rotor from 1.25 to 1.75 times. The investigation of the influence of stirring intensity on the flow field helps to understand the complex flow characteristics of velocity and pressure, which could guide the flotation process.
Comparative study of robotic common countersinking and robotic longitudinal-torsional composite ultrasonic countersinking experiments
Authors: Sun Lianjun , Chen Qiang , Lei Pei , Sun Hailong , Ren Guangyi , Yun Xin , Tian Jiaqiang , Liu Yulong 
Published: February 2025

Abstract
The robots with low stiffness are prone to chatter during countersinking, which inevitably reduces the accuracy of the countersink depth. In this paper, a method for decreasing the chatter of the robotic system is proposed by combining the robotic countersinking and longitudinal-torsional composite ultrasonic machining technology. Through the comparative study of robotic common countersinking (RCC) and robotic longitudinal-torsional composite ultrasonic countersinking (RCUC-LT) experiments, the feasibility and effectiveness of introducing ultrasonic vibration to improve the quality of robotic countersinking CFRP/Al stack have been proven from the three aspects: cutting force, hole wall quality and countersinking depth. The experimental results show that the cutting force of RCUC-LT has decreased by 35.69% than that of RCC. The hole wall quality of both CFRP and Al has been improved. Finally, for RCUC-LT, the values of countersinking depth are controlled between 1.45mm and 1.55mm, while most of the values of RCC exceed this range. Longitudinal-torsional composite ultrasonic machining technology is an effective way to improve the quality of robotic countersinking.
Effect of femtosecond laser composite texturing on tribological properties of 316LN stainless steel
Authors: Ma Junbei , Zhu Xinru , Xu Guanhua , Zhao Antao , Zhang Kaiguo , Li Yifeng , Zhang Qilin , Sang Lubin , Yang Xuefeng 
Published: February 2025

Abstract
As the working conditions of machining equipment become increasingly harsh, although 316LN stainless steel has good intergranular corrosion resistance and high-temperature mechanical properties, due to its relatively soft hardness, technical methods are still needed to improve its wear resistance. In this paper, after studying the mechanism of action of discrete texture and continuous texture, it is considered to be compounded. Two kinds of composite textures were designed, namely circular and grooved textures (CG) and rectangular and grooved textures (RG). The texture was prepared by femtosecond laser surface texturing technology (LST). The effects of different composite texture shapes and texture gaps on the tribological properties of materials were studied by reciprocating linear friction and wear tests. The results show that when the texture gap is 0.3mm, the composite texture has a tendency to improve the tribological properties. The friction coefficient is between 0.13-0.15, and the friction coefficient is stable, with RG exhibiting the best effect. Under the oil lubrication conditions, it is observed by scanning electron microscopy that the textured sample is mainly abrasive wear, accompanied by slight adhesive wear.
Study on the stiffness and damping characteristics of a Single-Chamber Hydro-pneumatic suspension without Hydro-pneumatic separation
Authors: Dai Li , Liu Yu , Wang Li , Wang Jiaxing 
Published: February 2025

Abstract
Hydro-pneumatic suspension can withstand large loads and impacts, significantly enhancing ride comfort. It is predominantly used in heavy-duty trucks, construction vehicles, and other types of vehicles that operate in complex and varied terrains. Based on the structural characteristics of the single-chamber hydro-pneumatic suspension without separation, a mechanical model is established to analyze the stiffness and damping characteristics of the suspension system. The effects of different initial pressures and volumes of nitrogen on stiffness, as well as the influence of the size of the damping hole on damping characteristics, are separately calculated. Finally, the simulation software Amesim is utilized to verify the calculation results, revealing that the stiffness characteristics and damping characteristics of suspension exhibit significant nonlinear features, and the system meets the requirements for vibration reduction, providing a valuable reference for the structural design of the suspension.
First-principles molecular dynamics simulations of the mechanical properties of Ti-Zr-Cu-Ni-X (X = Ta, Mn, V)
Authors: Jiao Haichao , Wen Mingyue , Li Zishuo , Yan Tingyi , Li Biao 
Published: February 2025

Abstract
To improve the research efficiency and shorten the research cycle of new Ti-Zr-Cu-Ni-based high-entropy bulk metallic glass (HE-BMGs), three HE-BMGs of Ti-Zr-Cu-Ni-X (X=Ta, Mn, V) were simulated and prepared by molecular dynamics simulation method in this paper. The radial distribution function (RDF) was used to analyze the degree of disorder in the output alloy structure. The constant strain method was used to calculate the elastic modulus of the constructed model and to infer the mechanical properties of the amorphous alloy. HE-BMGs with the addition of V elements have Young’s modulus of elasticity of up to 105 GPa and shear modulus of up to 37 GPa with the addition of Mn elements. The Poisson’s ratio is an optimum 0.34.
The influence of eccentricity and inlet water temperature on the water film pressure of water-lubricated bearings
Authors: Wang Shuaishuai , Zhu Faxin , Ten Xianbin , Dong Liangxiong 
Published: February 2025

Abstract
To explore the influence of eccentricity and inlet water temperature on the water film pressure of water-lubricated bearings, two different operating conditions are analyzed using ANSYS Fluent software for finite element analysis, grounded in the parameters of a laboratory small-scale underwater propeller’s water-lubricated bearings. The results indicate that, with all other conditions remaining unchanged, as the eccentricity gradually increases, the maximum positive pressure of the water film continuously increases, and the minimum negative pressure within the water film continuously decreases. Similarly, with all other conditions unchanged, as the temperature of the inlet water reduces, the maximum positive pressure within the water film continuously increases, and the minimum negative pressure of the water film continuously decreases.
Study on sensitivity analysis of blade airfoil characteristics against foreign object damage based on K-Means clustering
Authors: Yang Zijiang , Sun Tianyu , Tang Wei , Kong Weisong 
Published: February 2025

Abstract
In order to solve the problem of the unclear relationship between the aerodynamic characteristics of aircraft engine fan blade airfoil (such as leading edge radius and wedge angle) and its resistance to foreign body damage (FOD) and the sensitivity analysis under data redundancy conditions that cannot be achieved by traditional data analysis methods, a sensitivity analysis method based on K-means clustering was proposed. First, simulated impact tests were conducted on TC4 titanium alloy specimens using an air cannon. The step-loading test method was used to assess the High cycle fatigue (HCF) strength of the damaged specimens. Then, K-means clustering was employed to categorize the experimental data and determine the number of clusters for the test regions. Finally, in the partition divided by the K-means method, under the condition of disordered experimental data, the influence of multiple factors on the HCF of fan blades at different stages was obtained, which provides an effective data analysis method and a solid theoretical basis for the subsequent design and finalization of fan blades.
The effects of bubble defect parameters on the mechanical properties of polymer materials
Authors: Li Yong , Yao Jinshuai , Fu Yan , Miao Yanan , Chen Long , Liu Xunchen , Zheng Kai , Han Shanling 
Published: February 2025

Abstract
As materials science continues to advance, accurately predicting and controlling the effects of microscopic defects on the macroscopic mechanical properties of materials has become a crucial research area. Traditional experimental methods currently face challenges in providing precise characterization at the microscopic scale, particularly regarding the accurate definition and quantification of geometric parameters associated with micro-bubble defects. Consequently, there is an insufficient understanding of their effects on material mechanical properties. This study integrates CT scanning and 3D printing technologies to propose a novel method capable of precisely reproducing internal defects at the microscopic scale, enabling accurate control over defect size and spatial positioning. Additionally, a symbolic regression algorithm is employed to fit the stress-strain relationship of defective materials, exploring how varying aspect ratios and angles of defects affect polymer material degradation performance. The findings indicate that as the defect angle increases, there is a significant reduction in the stress attenuation rate within the material. Furthermore, materials with larger aspect ratios demonstrate better tensile performance and slower degradation rates across all angles. This method significantly enhances precision in controlling defect geometry and improves quantitative predictive capability regarding material performance by overcoming limitations associated with traditional approaches used to systematically characterize microscopic defects’ effects.
Research on tolerance optimization method for aircraft thin-walled components based on improved particle swarm optimization algorithm
Authors: Xue Dong , Tian Dalong , Sun Xing , Zhou Jiangtao , Du Han 
Published: February 2025

Abstract
The assembly accuracy of aircraft thin-walled components produced in the same batch is subject to fluctuations influenced by part tolerances and assembly processes. Significant variations in assembly precision can lead to increased assembly adjustment costs, severely affecting both efficiency and overall expenses. However, tolerance optimization that takes into account these fluctuations requires the integration of assembly deviation calculations, characterized by a high demand for large sample sizes and frequent iterative computations, which results in escalated computational costs. In this context, this paper establishes a data-driven mathematical model for tolerance optimization that comprehensively considers fluctuations in assembly accuracy, manufacturing costs, and quality losses, using a surrogate model as the core computational engine. Furthermore, to address the shortcomings of the traditional particle swarm optimization algorithm, namely, its tendency to get trapped in local optima and its insufficient local search capabilities, this study proposes an improved particle swarm optimization algorithm that integrates a chaotic local search strategy and second vibration particles. This enhanced algorithm is applied to the tolerance optimization problem of aircraft thin-walled components.
Optimum laser parameters of laser cladding WC coating on TC4 surface
Authors: Wang Di , Yi Xiaohao , Zhao Hui , Zhang Kaiyue , Du Chunyan , Qu Ning , Sun Huanming 
Published: February 2025

Abstract
To be able to acquire improved procedure settings, the microstructure and physical characteristics that comprise the TC4 surface are analyzed and compared. This study discusses the method of choosing laser parameters for the laser cladding of WC coating. The findings indicate that W2C, TiC, α-Ti, and WC make up the majority of the microstructure of the TC4/WC hybrid covering at 900 W, 1100 W, 1300 W, and 1500 W. TiC is mostly present as particles at low power levels, and as power increases, the coating takes on columnar and dendritic characteristics. Under 1300 W laser, the hardness of the coating increased the most, reaching 595 HV, 1.75 times the base material.
Simulation study on the passability of the soft lunar surface of the wire screen wheel
Authors: Dong Yuming , Luo Haitao , Li Yuxin , Li Dehui 
Published: February 2025

Abstract
In order to evaluate the passing performance of the wire mesh screen wheel designed for the lunar mobile platform, a beam element co-node method was proposed to build the finite element model of the wheel net according to its special wheel net structure. The wheel net model built by the beam element co-node method not only ensures the mesh quality and wire cross-section characteristics, but also greatly reduces the number of meshes compared with the direct meshing of the model. The lunar soil discrete element particle model and the screen wheel finite element model were set up in LS-DYNA for the joint working conditions. The screen wheel designed according to the lunar platform has a sinking amount of less than 10% of the wheel diameter and a driving torque of less than 10.2N•m under various working conditions, which proves that the wheel has good passing performance.
Simulation analysis of nonlinear consolidation in soft soil based on large-scale consolidation permeability tests
Authors: Yue Changxi , Pan Wei , Cao Yonghua , Ye Guoliang , Yu Changyi 
Published: February 2025

Abstract
To mitigate the influence of test size on the nonlinear compression and permeability characteristics of soft soils, this study utilized a custom-made large scale consolidation-permeation apparatus to conduct indoor experiments. The relationship between the permeability coefficient and consolidation pressure of soft clay, with the preconsolidation stress as the critical point, was obtained. A nonlinear permeability model based on growth curves was established, with relevant fitting coefficients exceeding 0.99. Finally, through the secondary development of a finite element software subroutine, the nonlinear consolidation calculations of the soil were implemented and compared with experimental results, thereby validating the reliability of the model.
Tailings sedimentation in deep-cone thickener by the numerical modelling approach
Authors: Mao Zhiran , Wang Xuetao , Wang Yulian , Chu Lianyu 
Published: February 2025

Abstract
A laboratory-scale deep cone thickener is investigated by a numerical modelling approach to explore the flow characteristics, thereby improving the thickener’s performance. The interaction between solid and liquid is described by the Euler-Euler model, while the turbulence is captured by the RNG k-ε model. The results indicate that when the feed concentration increases, the axial velocity and the particle concentration of overflow and underflow increase. When the feed concentration exceeds 15%, the particle concentration of overflow reaches a higher level and tends to stabilize. Furthermore, this study provides a reference for the control of feed concentration in the thickener.
The study of isothermal reduction kinetics of Cara Mine by full hydrogen reduction
Authors: Zhang Chen , Shi Haihao 
Published: February 2025

Abstract
The study investigated the changes in the degree of metallization of Kara iron powder with particle sizes ranging from 0.5-1.7 mm during hydrogen reduction at different temperatures (700-1000°C) and durations (0-100 min). The effective activation energy for the hydrogen reduction of Kara iron ore was calculated using the unreacted nuclear model, and the corresponding reduction kinetics equation was established to obtain the limiting link in the reduction reaction. [1] The results indicated that as the reduction temperature is increased, the degree of reduction of the iron powder increases in accordance with the aforementioned. In the low-temperature range (700~800°C), the hydrogen reduction of iron powder was controlled by diffusion reactions, while at intermediate to high temperatures (850°C), it was governed by interfacial chemical reactions. At high temperatures (900°C), the hydrogen reduction of iron powder was again dominated by diffusion reactions, with the calculated activation energy (Ea) being 73.637 kJ/mol. [2,3,4]
Non-planar slicing algorithm based on AABB and OBB bounding boxes for additive manufacturing
Authors: Liu Han , Xing Fei 
Published: February 2025

Abstract
To solve the geometric computation and execution efficiency problems involved in surface layering in additive manufacturing technology, a non-planar slicing algorithm using the envelope box optimization computation is proposed. First, the base mesh is offset to obtain a set of curved cross-sections. Second, collision detection is performed on the axis-aligned bounding boxes of the triangular facets in the intersection space of the model and the oriented bounding boxes of the cross-section. Finally, intersection is computed only for the pairs of triangles that pass the detection. The proposed non-planar slicing algorithm is applied to the STL model of the part. The results show that the proposed method can effectively reduce redundant computations, speed up the running time by 99.8% compared with the direct slicing method, and greatly improve the efficiency of obtaining the closed contour.
Study on rock crushing effect of uncoupled charge in different media based on numerical simulation
Authors: Duan Haixia , Da Benna , Na Chunyu , Bai Qiong 
Published: February 2025

Abstract
In this paper, based on the finite element numerical simulation, the influence of uncoupled charge on rock blasting effect under the condition of water and air is studied. The results show that the stress wave propagation speed of the air medium uncoupled charge is faster, and the stress fluctuation is larger in the early stage of blasting. The water medium uncoupled charge is more effective in energy transfer and crack formation. This shows that the decoupling charge of water medium can improve the energy utilization rate of explosives, reduce the vibration caused by excessive crushing, save the amount of explosives, and enhance the effect of blasting crushing.
The simulation of thermal stability in perovskite solar cells
Authors: Xue Lijuan 
Published: February 2025

Abstract
The purpose of this study is to study the performance changes of perovskite solar cells under fluctuating temperature conditions. The temperature of PSCs fluctuates dynamically in this environment over an extended period due to the interaction between solar radiation and the surrounding temperature. The lowest temperature is 13°C, the highest temperature can reach 63.4°C, and the thermal stress, thermal strain, and displacement are analyzed and the structure is optimized. The findings demonstrate that stress, strain, and displacement of PSCs rise dramatically with decreasing temperature when the structure temperature is below the volume reference temperature. Stress, strain, and displacement all significantly increase when the temperature rises above the reference volume temperature of the structure. At both the lowest and maximum temperatures, the optimized structure’s stress and strain values are less than those of the original structure.
Study on the erosion-corrosion behavior of copper-nickel alloys in high temperature and high humidity marine environment
Authors: Wang Kun , Tian Xuefeng , Liu Xu , Wang Gui , Deng Jianhua 
Published: February 2025

Abstract
This paper focuses on the study of B10 copper-nickel alloy, utilizing a self-designed tubular flow erosion device to simulate the seawater environment. Various testing techniques, including electrochemical impedance spectroscopy (EIS), potentiodynamic polarization curve measurements, and X-ray energy dispersive spectroscopy (EDS) analysis, were employed to investigate the erosion-corrosion behavior of B10 alloy in the South China Sea seawater. Combined with the observation of corrosion morphology and compositional analysis, the influence laws of different time durations, temperatures, and flow velocities on the initial erosion-corrosion of B10 alloy were discussed. The results indicated that during erosion tests conducted in dynamic seawater with a flow velocity of 3 m/s and a temperature of 40°C for varying durations (30 minutes, 1 hour, 2 hours, and 4 hours), the highest corrosion potential was observed at 2 hours, with an oxygen (O) elemental weight percentage of 16.34%. As the erosion time increased, the oxide layers on the B10 surface gradually became denser. When erosion tests were conducted at a flow velocity of 3 m/s and an erosion time of 2 hours, but with varying temperatures (30°C, 40°C, and 50°C), the results showed that at 40°C, the erosion traces on the B10 surface were pronounced, indicating severe corrosion. At 50°C, the oxide layers on the material surface were relatively dense, accompanied by a higher number of rust blisters. The O elemental content was the lowest. In tests conducted at a temperature of 40°C, an erosion time of 2 hours, but with varying flow velocities (1 m/s, 2 m/s, 3 m/s, and 4 m/s), it was found that at a flow velocity of 3 m/s, the erosion traces were most evident, with large and numerous corrosion pits. However, at a flow velocity of 4 m/s, the oxide layers on the material surface were denser. The corrosion traces were gradually covered by a passivation film, rendering the corrosion pits less apparent.