bluuebunny/crossref_metadata_2025_split huggingface dataset:
Impact characteristics and strength evaluation of a slender body obliquely entering water at high speed
Authors: Zhu Chaobing , zhang Dahai , Fei Qingguo 
Published: September 2022

Abstract
Based on Coupled Eulerian-Lagrangian method, the impact characteristics and strength evaluation of high speed multi-angle oblique water entry of slender body were studied. In order to solve the complex fluid-structure coupling problem and large deformation problem, the Lagrangian grid is used to divide the slender body structure grid, and the Euler grid is used to divide the fluid grid, the effectiveness of the method is verified by comparing with the experimental results. Furthermore, by simulating the impact process of multi-angle water entry, the time-history curves of acceleration, stress and strain at the head position of the slender body were analyzed, and the strength evaluation was carried out to verify the structural safety combined with the residual strength formula. The results show that there is a positive correlation between the impact load and the water inlet angle, and the larger the water inlet angle, the greater the impact load; the residual strength factor of the slender body is positive at 15° and 20°, and the structure is safe, at 30°, the residual strength factor is -0.203, and the structure is unsafe.
Surface Quality for Cryogenic Milling Mg-1.6Ca-2.0Zn Medical Magnesium Alloy
Authors: Guo Xuan , Liu Guodong , Lin Qichao , Qiao Yang 
Published: September 2022

Abstract
As an absorbable and implantable biomedical material, magnesium alloy has made great progress in the application of biomaterials in recent years because of its excellent biocompatibility and biomechanics. At the same time, the disadvantages of magnesium alloy materials are more obvious. Because of the large linear expansion coefficient of magnesium alloy, the high temperature during dry cutting will lead to the degradation of machined surface quality. In addition, due to the active chemical properties of magnesium, cutting fluid is easy to cause corrosion of machined surface, and it is easy to react with water in cutting fluid to release hydrogen, causing accidents. In this paper, the effect of cryogenic milling with liquid nitrogen on the surface quality of magnesium alloy was studied by comparing the prepared magnesium alloy in different cooling environments, and the surface roughness model was established for prediction and verification. The results show that the roughness value of the surface machined by liquid nitrogen cryogenic milling is smaller than that of dry cutting, and the hardness value is larger than that of dry cutting, which is very beneficial to improve the surface quality of workpiece. This paper aims to improve the low-temperature machining process of magnesium alloy, and provide theoretical and practical guidance for the preparation, processing and application of high-performance medical magnesium alloy.
Super-wetting membrane with internalized PVA-TA gel networks for oil/water separation
Authors: Bai Zhongxiang , Liu Shuning , Liu Chenchen , Lin Guo , Jia Kun , Liu Xiaobo 
Published: September 2022

Abstract
In this paper, dimethyl sulfoxide (DMSO) was used as the hydrogen bond inhibitor to realize the co-dissolution of polyvinyl alcohol (PVA) and tannic acid (TA) in the casting solution. When the casting solution was placed in a water coagulation bath, the hydrogen bond cross-linking between PVA and TA is re-established, realizing the in-situ hydrogel network modification of the ultrafiltration membrane. The results show that the as-prepared membranes have underwater super-oleophobic properties and exhibit excellent anti-fouling ability during the separation of oil-in-water emulsions.
Optimization Design of FSAE Racing Car Sprocket Based on ANSYS
Authors: Zhou Jing , Lin Yu , Zhou Zhengzhi 
Published: September 2022

Abstract
In order to improve the dynamic performance of FSAE racing car, the finite element analysis and lightweight design of racing sprocket are studied in this paper, Firstly, the parametric modeling of the big sprocket of FSAE formula racing car was carried out, and then the finite element modeling and analysis of the initial design scheme was carried out based on ANSYS Workbench software. The lightweight design was designed on the premise of meeting the design requirements, and the reliability of the sprocket design was ensured. Finally, the strength, safety factor and life of the optimized model were simulated and verified, the sample was manufactured, and the physical experiment was carried out by assembling and integrating the model into the racing car. The results show that the optimized sprocket meets the work requirements.
Study on Microstructure Distribution of Al-Cu-Mg Alloy in Squeeze Casting Process
Authors: Li Longfei , Zheng Yuankai , Chen Yunbo , Feng Jian , Li Chunming , Chen Lin , Zuo Lingli , Zhang Yang 
Published: September 2022

Abstract
The squeeze casting process is an advanced technology, which is suitable for a wide range of alloys including Al-Cu-Mg alloys. The high pressure in squeeze casting process both refines the microstructure and enhances the mechanical property of the alloys. The heat transfer and solidification process are complex with the chilling mould and pressure of machine punch. This results in the inhomogeneous microstructure and property in casting alloy. This study focuses on the distribution of microstructure, chemical composition, and hardness of Al-Cu-Mg alloy along the radial direction of casting. The composition and area fraction of eutectic phases are characterized. Moreover, the relationship between the microstructure and mechanical property was also analysed to show the characteristic of microstructure in squeeze casting process.
Boron-containing carbon aerogels: excellent mechanical and thermal insulation properties
Authors: Mu Changqing , Cheng Yiling , Zhang Kai , Zhou Jiachang , Fan Jinpeng 
Published: September 2022

Abstract
The boron-containing carbon aerogels with excellent properties are reported: The precursor of carbon aerogels was modified by boric acid. Compared with the unmodified carbon aerogels, the compressive strength of the prepared carbon aerogels has been significantly improved, reaching 4.57MPa. The density of the carbon aerogels is between 0.253-0.287g/cm3, and the thermal conductivity is also kept at a low level of 0.057-0.062 (W⋅m-1⋅k-1). Excellent mechanical and thermal insulation properties make the prepared carbon aerogels have a good application prospect.
Degradation behavior of heat-treatment silicate adhesive under special working conditions
Authors: Zhao Yuhang , Fan Ruicheng , Cui Yongjie , Bai Jian , Li Chao 
Published: September 2022

Abstract
Inorganic adhesive is widely used in the sealing and connection of electronic devices. Its insulation is highly important in the performance of installation. In this paper, the insulation resistance and tensile strength of different composite silicate samples were measured by test machines. The morphology and surface composition were analyzed by electronic microscope and energy spectrum analyzer. The results show that: In a humid environment, the resistance insulation of adhesive increases with the rising of heat treatment temperature, and decreases with the increment of wet environment. When the modulus ratio of colloidal liquid is in the range of 7.2~9.1 and the heat-treatment temperature is larger than 600°C, the effect of moisture resistant is remarkable. The tensile strength of adhesive deteriorates with the increasing of humidity. Furthermore, with ascending heat treatment temperature, the tensile strength rises when the modulus ratio of adhesive is less than 7.2, and declines when it is more than 9.1.
Research of high temperature redundant thin film thermocouple
Authors: Sun Yongguo , Teng Fei , Guo Shuai , Chen Jie 
Published: September 2022

Abstract
Using the two-way flow-heat and one-way thermo-solid coupling simulation analysis methods, the designed thin-film thermocouple is analyzed by finite element, and the flow field, temperature field, and structural field inside the sensor are obtained. The high-temperature redundant thin-film thermocouple working simulation test shows that: The response time of the designed thin-film thermocouple is less than 2 seconds, and the stress and deformation are within the required range under the operating temperature load and wind load.
Research on multi-condition topology optimization design of stainless steel spot welding vehicle considering weight coefficient
Authors: Li Yana , Meng Di , Zhang Zeyang 
Published: September 2022

Abstract
A multi-condition topology optimization research method with weight coefficients is proposed to optimize the topological optimization of solder joints of stainless steel spot welding vehicle. Based on the SIMP variable density method, the compromise planning method, the orthogonal experiment design method, the gray correlation method, the entropy weight method and the analytic hierarchy process are used to introduce the weight coefficients, and objective function of the multi-objective topology optimization of the welding points of the stainless steel spot welding vehicle is established. This method realizes the topology optimization of the stainless steel spot welding vehicle model with the goal of flexibility the minimizing of multiple working conditions. It is concluded that the entropy weight method is more suitable for determining the weight coefficient analysis of objective function of multi-condition topology optimization. The average variation value of the flexibility under the three working conditions is the largest, and the number of solder joints is reduced by 17.8% after optimization. The proposed multi-condition topology optimization research method can be applied to the topology optimization design of railway vehicle structure.
Transient Temperature Field Simulation Analysis of Magnetorheological Grease Torsional Vibration Damper
Authors: Xiao Zida , Hu Hongsheng , Ouyang Qing , Shan Liyang , Su Hongbo 
Published: September 2022

Abstract
To reveal the transient temperature distribution pattern inside the magnetorheological grease (MRG) torsional vibration damper and explore the relationship between the current and the internal temperature of the device, the transient temperature simulation analysis of the MRG device was conducted in this paper. Firstly, a theoretical heat transfer model of MRG torsional vibration damper with dual heat source structural feature was established based on the Bingham constitutive model and the temperature-dependent viscosity characteristic of MRG. Then, the transient temperature field model of the MRG torsional vibration damper was developed by the finite element method, and the temperature field distribution and temperature-time variation characteristics of the MRG torsional vibration damper were analyzed. The simulation results show that the temperature rise of MRG in the working domain is the fastest, and the temperature rise rate slows down after the device works for 5.4s. The simulation results reveal the internal temperature distribution and temperature rise characteristics of the torsional vibration damper, which provides a theoretical basis for the structural optimization and control strategy design of MRG torsional vibration damper considering temperature factor.
Simulation analysis of titanium alloy micro-drilling based on thermo-mechanical coupling
Authors: Wu Zhenhe , Zhang Faping , Feng Kuikui 
Published: September 2022

Abstract
With the increasing demand for high precision micro parts in machining field, the development of micro hole drilling technology, especially the finite element simulation technology is rapidly promoted. However, there are many limitations in the simulation of micro-drilling, such as element size, computational efficiency, chip forming, etc. In the present work, a finite element software, Abaqus has been used to simulate the thermal-mechanical coupling micro-drilling process of titanium alloy material, and the key technologies, such as twist bit modeling, material constitutive model, chip separation criterion and element division, were investigated. Through simulation, it was found that with the increase of rotational speed and the decrease of feed speed, chip shape gradually fragmented, in addition, thrust force and torque diminished. Since chip shape, thrust force and torque are important factors affecting drilling quality and tool life, the work could offer important guiding significance for cutting parameter optimization.
Preparation and dynamic behavior of W-Mo-Y co infiltrated layer on the surface of 45 steel parts
Authors: Huang Change , Wang Chenglei , Tan Hong , Lu Rongwei , Yang Jijie , Xie Yingguang , Li Xin , Liu Chong 
Published: September 2022

Abstract
In this paper, W-Mo-Y co infiltration were carried out on the surface of 45 steel wedge components by plasma solid-state surface metallurgy technology. The phase, hardness, friction and wear properties before and after W-Mo co infiltration and W-Mo-Y co infiltration were systematically studied. The diffusion kinetics such as diffusion coefficient and diffusion activation energy were calculated by Fick's second diffusion law, and the effect of Y on the diffusion of W and Mo atoms in the infiltrated layer was obtained. It is found that the addition of rare earth Y element increases the diffusion coefficient of W and Mo atoms and reduces the diffusion activation energy, which has a certain catalytic effect. And the W-Mo-Y co infiltration significantly improves the surface hardness and wears resistance of the parts and prolongs the service life of the parts.
Design of Bi-directional Pump Servo System for Asymmetric Hydraulic Cylinder
Authors: Mao Hong-yong , Yang Xue-meng , Fan Zhuo , Lu Jing-jing , Jing Man-jun , Jiang Yong , Huang Ya-nong 
Published: September 2022

Abstract
In view of the shortcomings of the traditional overflow pressure regulating and throttling speed regulation system, such as large energy loss, high oil temperature and large reversing impact, a servo two-way pump control system for asymmetric hydraulic cylinder is proposed based on Siemens S120. TIA Portal And Starter software are used for the design of hardware configuration and program debugging. SimulationX is used to simulate the stroke process of the hydraulic cylinder, at the same time, experimental verification was carried out, which provides a new idea for the low energy consumption design of hydraulic cylinder servo control system, and has important practical significance.
Key Analysis of Design and Numerical Simulation for Aluminum Alloy Impeller Low-pressure Casting Mold
Authors: Wang Yingli , Wang Fengxian 
Published: September 2022

Abstract
It is of great practical value to complete the low-pressure casting of aluminum alloy impeller in the current development of low-pressure casting process. In the research, it is necessary to focus on factory realization and use low-pressure casting to produce aluminum alloy impellers, so that impeller castings with compact structure and meeting performance requirements can be obtained. Compared with other casting methods, low-pressure casting itself, as a precision casting method, can be cast on the metal solution with lower pressure in the application process. The castings can be filled and solidified under certain pressure, and the castings with compact structure can be obtained. In the research, Pro / Engineer is used to design the low-pressure casting mold for aluminum alloy impeller, and MAGMASOFT is used to carry out the filling and solidification process of aluminum alloy impeller. Through numerical simulation, we can accurately predict the defects of impeller castings, and optimize the mold scheme and pressure-time parameters according to the prediction results.
Improved LuGre-based friction modeling of the electric linear load simulator
Authors: Ping ZiLong , Zhang WenSen , Fu YongLing 
Published: September 2022

Abstract
In order to fulfill the requirement that the electric linear load simulator needs to improve the loading accuracy by the compensation method based on the friction model in the active loading situation with small load, considering the influence of load on coulomb friction and maximum static friction, an improved LuGre friction model with load is proposed. At the same time, since the friction effect is highly nonlinear and determined by numerous parameters, the differential evolution algorithm is utilized to identify the static and dynamic parameters of the model in two steps offline. Finally, under the sinusoidal signal for force command, the experimental test results verify that the improved LuGre model with identified parameters can accurately describe the friction characteristics of the electric linear load simulator.
Research of Parametric Modeling and Simulation Analysis Methods of Aero-engine’s Rear Variable Area Bypass Injector of Mapping Dispersive Dimension Based on ADAMS
Authors: Ye Shaoping , Li Jia , Xie Liyang , Song Rui , Yi Wang 
Published: September 2022

Abstract
Aiming at the problem of motion accuracy caused by dispersive dispersion in the design of the aero-engine rear variable area bypass injector, a multi-body dynamics model mapping dimension tolerance, part flexibility, and collision contact is established based on multi-body dynamics theory and ADAMS. The simulation results are verified with the theoretical solution, which is calculated in MATLAB to ensure the correctness of the simulation’s results. The effect of key design variables on the motion accuracy of the mechanism is analyzed by the parametric module. The reliability calculation method is studied based on the improved Latin hypercube Monte Carlo method mapping the dimension dispersion. The method provides the relevant basis for the structural design of the RVABI.
Improvement of phase inductance slope method for Without Position Sensor control of switched reluctance motor
Authors: Qiu Chunyuan , Sun Baojiang 
Published: September 2022

Abstract
At present, the research hotspot of switched reluctance motor is to realize the accurate control of motor without position sensor. Among many control methods, the phase inductance slope method is concerned by researchers because it does not need to add additional power supply circuit, and does not need to calculate the flux linkage and inductance curve in advance. Aiming at the defect that the phase inductance slope algorithm can not advance the opening angle and the position signal error is easy to appear near the opening angle, this paper makes an improvement and verifies the experiment.
Research on Cyclist Injury Based on Simulation Model of Real Electric Vehicle and Two Wheeled Vehicle Collision Accident
Authors: Zhao Lijun , Zhang Qian , Yang Na , Wang Jianfeng 
Published: September 2022

Abstract
There are more and more traffic accidents between cars and electric two wheeled vehicles. As a vulnerable participant in traffic, it is of great significance to study the head biomechanical injury of electric two wheeled vehicle cyclists. In order to study the head injury of cyclists, by optimizing the tissue material properties and material parameters of the head finite element model, a refined head finite element model is established and verified by Nahum cadaver experiment; Based on the real traffic accident of vehicle electric two wheeled vehicle collision, a multi rigid body model of vehicle electric two wheeled vehicle is established for vehicles, electric two wheeled vehicles and cyclists, and the reliability of the collision model is verified; The head finite element model is used to analyze the changes of equivalent stress. The results show that the equivalent stress of brain tissue is gradually transmitted from both sides of brain tissue to the cerebellar region at the back of brain, and finally concentrated in cerebellum.
Development of muon scattering tomography for detection of reinforcement in concrete
Authors: Dobrowolska M. , Velthuis J.J. , De Sio C. , Kopp A. , Milne R. , Pearson P. 
Published: September 2022

Abstract
Inspection of ageing, reinforced concrete structures is a world-wide challenge. Existing evaluation techniques in civil and structural engineering have limited penetration depth and do not allow to precisely ascertain the configuration of reinforcement within large concrete objects. The big challenge for critical infrastructure (bridges, dams, dry docks, nuclear bioshields etc.) is understanding the internal condition of the concrete and steel, not just the location of the reinforcement. Muon scattering tomography is a non-destructive and non-invasive technique which shows great promise for high-depth 3D concrete imaging. Here a method is presented to locate reinforcement meshes placed in a large-scale concrete object. A reinforcement mesh was simulated as two layers of 2 m long bars, forming a mesh. Two layers of the mesh were placed at several distances from each other inside a large concrete block. Previously, we have shown that using our autocorrelation technique for single meshes inside the concrete and using only one week worth of data taking, bars with a diameter of 7 mm and larger, could easily be detected for a 10 cm mesh spacing. The signal for 6 mm diameter bar exceeds the background and becomes very clear after two weeks of data taking. Here we show that we can detect the vertical positions of two mesh layers inside the concrete. This is a very important result for non-destructive evaluation of civil structures.
Editorial: Special issue on advances in nanomedicine
Authors: Zhang Ye , Pei Renjun 
Published: September 2022

Abstract
Nanomaterials are being increasingly used to develop new methods of disease diagnosis and treatment, thereby providing novel paradigms to break through the current limitations of medicine. However, there is still a long way toward the complete revolution for nanomedicine in the diagnosis and treatment of diseases. As nanoparticles are highly complex products and difficult to characterize, there are still many challenges. This special issue on Advances in Nanomedicine includes a series of topical reviews and original research articles that highlight the recent advances in diagnosis and therapy of nanomaterials.
Ferroelectricity controlled chiral spin textures and anomalous valley Hall effect in the Janus magnet-based multiferroic heterostructure
Authors: Zhu Yingmei , Cui Qirui , Liang Jinghua , Ga Yonglong , Yang Hongxin 
Published: September 2022

Abstract
Realizing effective manipulation and explicit identification of topological spin textures are two crucial ingredients to make them as information carrier in spintronic devices with high storage density, high data handling speed and low energy consumption. Electric-field manipulation of magnetism has been achieved as a dissipationless method compared with traditional regulations. However, the magnetization is normally insensitive to the electric field since it does not break time-reversal symmetry directly, and distribution of topological magnetic quasiparticles is difficult to maintain due to the drift arising from external fluctuation, which could result in ambiguous recognition between quasiparticles and uniform magnetic background. Here, we demonstrate that electric polarization-driven skyrmionic and uniform ferromagnetic states can be easily and explicitly distinguished by transverse voltage arising from anomalous valley Hall effect in the Janus magnet-based multiferroic heterostructure LaClBr/In2Se3. Our work provides an alternative approach for data encoding, in which data are encoded by combing topological spin textures with detectable electronic transport.