bluuebunny/crossref_metadata_2025_split huggingface dataset:
Simulation Study on Lightweight Design of Aluminum Alloy Tube Buffer for Automobile
Authors: Wang Shang , Wang Xuelei , Zhang Yajuan 
Published: August 2023

Abstract
Lightweight is one of the development trends in the automobile industry. Aluminum alloy tube buffers can absorb a lot of energy continuously to protect the personal safety of drivers and other personnel in case of automobile safety accidents. On the premise of not weakening the buffer effect, it is a difficult problem to effectively lightweight the buffer design. To complete the design index of automobile lightweight, the aluminum alloy buffer is studied. In this study, a steel tubular indenter is proposed to replace the original aluminum solid core indenter. Firstly, the finite element model of the original solid-core buffer is established and simulated on the server. Secondly, the simulation results are analyzed, and the effect of the real core indenter on the buffer capacity is very small. Thirdly, the lightweight design scheme is proposed and the new model is established. Finally, the lightweight design scheme is objectively evaluated by taking the energy absorption capacity and the variance of the impact load. The results show that it is feasible to replace the original solid core indenter with a steel tubular indenter. The mass of the new model indenter is reduced from 361.2 g to 252.4 g. The energy absorption value of the new model is the same as that of the original model (1.05 kJ), but the variance of impact load is reduced from 20.22 to 12.60. The lightweight buffer design scheme meets the requirements.
Simulation and Analysis of Three-point Bending Experiment with Hollow Beam Based on Abaqus
Authors: Liang Meiqin , Wang Shang , Peng Fei 
Published: August 2023

Abstract
Bending resistance is a crucial performance indicator for many hollow beams in service. However, traditional three-point bending experiments face challenges in measuring the stress of the inner wall, making it difficult to study the stress distribution and bending resistance of hollow beams under different external loads. In this study, we established a finite element model based on Abaqus and computed on a server to investigate the stress distribution and bending resistance of hollow beams. Our simulation results show that the structure of the beam meets design requirements, and the hollow beam has a bending resistance of 4.26 kN and a maximum stress of 378.6 MPa when the indenter displacement is 1 mm. As the indenter displacement increases to 10 mm, the bending resistance of the hollow beam increases to 9.04 kN, and the maximum stress reaches 636.4 MPa. We also observed stress concentration on the upper and lower sides of the cross-section, with lower stress in the middle region. Statistical analysis of the stress data revealed that the stress value of the nodes decreased as the distance from the center of the sample increased. Our results demonstrate that modeling and simulation are a feasible approach for studying the bending deformation of hollow beams, and this method provides abundant measurement data without size limitations, making it advantageous over traditional experimental measurement. We recommend that more scholars should explore this approach in their research.
Numerical Simulation of Thermal and Stress field of Extreme High-Speed Laser Material Deposition (EHLA) at Different Preheating Temperatures
Authors: Nian Liangxiao , Wang Miaohui , Ge Xueyuan , Wang Xin 
Published: August 2023

Abstract
Extreme high-speed laser material deposition (EHLA) technology is a novel approach to surface modification and component repair that offers benefits, including high cladding efficiency, a low dilution rate, and environmental friendliness. In this research, numerical modeling was used to analyze how varying substrate preheating temperatures affected the temperature field and residual stress of coatings made of 1Cr17Ni2 stainless steel. It was discovered that the peak melt pool temperature was less affected by the substrate preheating temperature. However, the cooling rate and temperature gradient were greatly reduced. When the preheating temperature was 450 °C, the cladding layer showed the lowest temperature gradient and residual stress. The investigation’s findings can be used as a reference to improve the EHLA of 1Cr17Ni2 stainless steel coatings and lessen the possibility of coating cracking.
An experimental investigation on the inkjet printed circuits based on response surface methodology
Authors: Wang Junjie , Hui Jizhuang , Zhang Hao , Yan Zhiqiang , Xu Zhiguang 
Published: August 2023

Abstract
To enhance the electrical conductivity and optimize the morphology of inkjet printed circuits, the response surface method was used to study the effects of Baseboard temperature, Scanning speed, number of layers, and their interactions on Wire width and resistance of printed circuits. Then the regressive equations of the line quality and the analysis of the variance of processing factors on the targeted response were determined. Finally, the optimized results are verified through an additional experiment. Results show the influence of the processing factors on the Wire width and resistance in the following order: Baseboard temperature > several layers > Scanning speed and several layers > Scanning speed > Baseboard temperature, respectively. The optimized parameter configurations are as follows: Baseboard temperature: 57.7 °C, Scanning speed: 1092.3 mm/min, and the number of layers is 2.76. The relative error between the precited data and the measured values is within 5%, which can provide a powerful and valuable reference for selecting processing factors in real manufacturing.
Forensic Analysis of PDC Bits at the Sinopec Shengli Oilfield
Authors: Li Yue , Han Bin , Li Meiyan , Liu Wei 
Published: August 2023

Abstract
Polycrystalline diamond compact (PDC) bit has occupied more than 90% of the total drilling footage in the world. Forensic analysis of dull PDC bits is an important research field that can investigate multiple factors and then find the main failure cause. The findings of the forensic analysis not only guide the selection and placement of the next bit but also promote the advancement of PDC bits. In this study, the PDC bit pulled out of the hole was photographed, and then a forensic analysis was carried out. Based on the analysis of 45 dull PDC bits, the failure causes of PDC bits were divided into three categories: impact, wear, and erosion, which were further divided into ten sub-categories. The correlation between the failure forms and the position of the cutters on the bit tip profile was also investigated. The result shows that the front impact is the dominant failure cause of PDC bits at the Sinopec Shengli Oilfield, which often occurs at the nose and shoulder of the tip profile, while the failure caused by the tip impact is concentrated at the cutters near the OD (outside diameter) position. The results would assist the selection and deployment of the PDC bit.
Topological design and high-performance additive manufacturing of porous femoral implants
Authors: Hao Yi , Liu Zhiqiang , Yao Chun , Liang Yuyao , Li Yinqi 
Published: August 2023

Abstract
The use of porous implants can successfully address the issues of stress shielding and sterile loosening associated with the use of solid implants in the human body. Implant structures can be designed and produced using topology optimization (TOP) and selective laser melting (SLM). In this paper, a unit-optimized structure with better mechanical properties is obtained by topology optimization as the femoral implant constitutive unit. The orthogonal experiment is used to optimize the process parameters of SLM molding Ti-6Al-4 V material to determine the optimal process parameters based on the judging criterion of density. Finally, the SLM technique is used to mold the optimized porous femoral implants. The results of the above study are found as follows: The volume fraction of the optimized cell structure is effectively reduced to 30%, effectively solving the stress shielding problem. Based on the optimal process parameters, the surface of the SLM molded porous femoral implant is clear, with good connection to adjacent unit structures and no overhang on the surface, indicating good molding quality. The application of high-performance porous femoral implants is made possible by this work.
A New Method for Improving Static and High Frequency Magnetic Properties of Fe67Co18Si11B4 Amorphous Alloy
Authors: Wang DongMeng , Ding Yanhong , Ma Xu , Li Yan 
Published: August 2023

Abstract
Rapidly quenched ribbons with a composition of Fe67Co18Si11B4 have been investigated. Surface leveling on the ribbon-free surface leads to the decline of the interior stress of Fe67Co18Si11B4 amorphous alloy, making a decrease of coercivity and a great improvement of static magnetic properties. Free surface leveling treatment can improve the AC magnetic properties of the Fe67Co18Si11B4 amorphous alloy. In high frequency region 106 Hz < f < 108 Hz, the quality factor Q > 3 can be achieved after surface leveling. Free surface leveling is an attractive method to achieve improvements in both static and high frequency magnetic properties.
Study on the Influencing Factors and Forming Process Selection of Sheet Metal Bending Spring Back Defects
Authors: Yang Shanshan , Peng Engao , Zheng Baoqi , Huang Zihan 
Published: August 2023

Abstract
In recent years, with navigation, aviation, chemical manufacturing, and automobile bodies increasing requirements for lightweight, high efficiency, and energy saving, quality requirements in the selection of materials and manufacturing process are also improved. However, there is an unavoidable elastic deformation in the process of plastic bending deformation of the panel veneer, and the accuracy of the workpiece is impacted by the spring back phenomenon, which causes dimensional and shape inaccuracies in the panel veneer. The purpose of this paper is to summarize and analyze the phenomenon of flexural spring back caused by material selection and processing techniques and to discuss the solution of the flexion bounce problem from the material selection, processing method, and machining mold, which can be applied to avoid material wastage.
Study on the effects of microstructures on the fracture behavior of an Al-Cu-Mg alloy
Authors: Liu Qilong , Li Xiwu , Li Zhihui , Wang Fengchun , Fu Jinlai , Gao Guanjun 
Published: August 2023

Abstract
In this study, a special fracture delamination in L-T fracture toughness specimens of an Al-Cu-Mg alloy was researched by applying three-dimensional optical microscopy (OM), scanning electron microscopy (SEM), and electron backscatter diffraction (EBSD) methods. The results indicate that the fracture delamination is contributed by the cracks extending a long distance in the T-direction and extending internally along the L-direction, which can result in a lower fracture toughness value. The fracture delamination is determined by the level of grain flattening and the distribution of the second phases. The flat grains result in a tendency for cracks to extend in the T-direction. At the same time, the unevenly distributed Al2Cu and Al2CuMg phases lead to cracks extending in the L-direction, which eventually causes the formation of delamination fractures. The reduction in grain size can also contribute to weakening the fracture delamination to a certain extent.
Study on Microstructural Evolution and Mechanical Behavior of Cold Rolled 316L Stainless Steel during Isothermal Annealing
Authors: Zhao Miaomiao , Liu Yang , Du Linxiu 
Published: August 2023

Abstract
316L stainless steel (SS) was processed using cold rolling and annealing to study microstructural evolution and mechanical behavior. The findings revealed that the deformation mechanism of 316L SS was dominated by deformation twinning during the cold rolling process. Different initial microstructures were prepared by annealing at 750 °C for 5 to 60 min. Various yield strengths (545–1192 MPa) and ductility (7.61–37.61%) combos were obtained according to grain size and annealing circumstances.
Research on 40Cr Laser Quenching Process for Guide Rail
Authors: Wu Lifeng , Long Weiming , Hao Qinle , Cheng Zhan , Yang Yang , Shi Lubing , Wu Yuanke 
Published: August 2023

Abstract
In this study, the use of laser quenching was explored as a method of surface strengthening for 40Cr steel utilized in machine tool guideways. The impact of various process parameters, including laser power, scanning speed, and spot radius, on the hardness and depth of the quenched layer was evaluated. The results indicated that the optimal process parameters were a laser power of 2000 W, a scanning speed of 20 mm/s, and a spot radius of 3 mm, which resulted in a maximum quenched layer hardness of 889 HV, an average quenched layer hardness of 764 HV, and a quenched layer depth of 0.7 mm. The application of the laser quenching process through multiple passes was shown to further improve the material properties, resulting in a hardness increase from 749 HV in a single quench to 980 HV in 16 quenches and a corresponding increase in the quenched layer depth from 0.2 mm to 0.9 mm. The hardness of the surface treated by the lap quenching process increased from 250 HV after a single quench to 390 HV after repeated quenching, leading to a more uniform distribution of hardness on the material surface. Furthermore, the average coefficient of friction decreased from 0.67 to 0.37, and the weight loss due to wearing was reduced from 9.7 mg to 1.7 mg after the staggered repeated quenching process.
Modulation of Optical Behavior in MoS2/WS2 Heterobilayers Using Hydrostatic Pressure
Authors: Li Yao , Song Zongpeng 
Published: August 2023

Abstract
The two-dimensional van der Waals (vdW) heterostructure composed of transition metal dichalcogenides (TMDs) has great photoelectric properties because of different energy band arrangements and interactions between layers. The lattice structure and photophysical properties of TMDs can be regulated through pressure, thus altering the properties of interlayer excitons. This study’s chemical vapor deposition method grew MoS2/WS2 vertical heterostructure. Its vibration mode signal and interactions between layers under pressure were investigated by pressure-variable Raman and photoluminescence (PL) spectra. We found that an inflection point appears at 1.22 GPa-1.89 GPa, and the PL peak changed with the variation trend of pressure. It is believed that the energy band transformation of MoS2/WS2 vertical heterostructures is induced by pressure. Our findings provide valuable information which is conducive to the development of new functional optoelectronic devices.
Study on the Strengthening Effect of Interlayer Micro-rolling on Additively Manufactured Al–4.7Si Alloy
Authors: Huang Jianwu , Wang Ruizhe , Zhang Haiou , Wang Guilan 
Published: August 2023

Abstract
Al-Si alloy is one of the most important and commonly used materials in the manufacture of lightweight components for automobiles. However, Its application is limited by low-strength properties, which are usually caused by micropores and columnar grains of the as-deposited WAAM alloy. To effectively address these issues, a special method of inter-layer micro rolling was used to fabricate the additively manufactured Al–4.7Si alloy in this paper. The strengthening mechanism of micro-rolling on this alloy was systematically studied by analyzing microstructure and properties. The experimental results showed that the number of micropores was substantially reduced, and the growth of columnar grains was significantly interrupted by inter-layer micro rolling, which had a clear effect on improving the mechanical properties of 4043 Al-Si alloy. The average ultimate tensile strength (UTS) and yield strength (YS) of the micro-rolled sample with 4 kN load achieved 159 MPa and 72 MPa, respectively, which were 18.6% and 38.5% higher than that without rolling, and elongation (EL) increased from 12.3% to 16.2%. This study is expected to provide an experimental and theoretical basis for improving the mechanical properties of additively manufactured aluminum alloys.
Design and Verification of Complex Intelligent Integrated Dual-robot Collaborative Drilling and Riveting System for Aircraft Assembly
Authors: Gao Wenxiang , Wei Haojie , Luo Yun , Lu Dawei , Zhang Lixin , Liu Chun , Wang Jiaxin 
Published: August 2023

Abstract
A complex intelligent integrated dual-robot collaborative drilling and riveting aircraft assembly system is proposed in this paper to solve the application problem of automatic drilling and riveting in narrow spaces. Firstly, the structure of the system is described. Then, the multifunctional end effectors which include intelligent drilling and riveting units are designed. Finally, relevant experiments are designed to verify the application of the system for the automatic drilling and riveting of complex laminated materials in different aircraft. The results show that the system can well adapt to the application scenarios of aircraft automatic drilling and riveting.
Simulation and Analysis of Welding Spot Failure of PCB Based on ABAQUS
Authors: Ma Zhuqiao , Tong Yifei , Liu Linyan , Huang Lei , Yuan Juntang 
Published: August 2023

Abstract
In the manufacturing process, the welding spot of PCB may lose efficacy because of the strain and stress impact. The reason for the occurrence of high-stress zones is the effect of the load brought by the manufacturing and assembly process. It is a giant challenge for the industry community to solve the problem of welding spots losing efficacy.
In this paper, the manufacturing techniques and assembly process will be analyzed first. With the analysis result, the main impact of load would be checked. Then, with the confirmed allowable stress by calculation, the value of input stress, which may cause the welding spot to lose efficacy, would be obtained. Finally, the result of this study would be confirmed by the simulation result generated by the finite element analysis software.
Ti3C2TX MXene@rGo Composite self-supporting membrane and its welding process
Authors: Ding Mingli , Zhang Xinyue , Zhang Wu 
Published: August 2023

Abstract
Ti3C2Tx MXene@rGo self-supporting film was prepared by HF etching and LiF/HCl etching method, and film welding was realized for the first time. The results showed that Ti3C2Tx MXene with typical accordion-like morphology was obtained by HF etching. In the Ti3C2Tx MXene@rGo self-supporting film welding test, it was found that in the time-sensitive period, Ti3C2Tx MXene@rGo self-supporting film can be welded with water as the medium, effectively ensuring the stability of the material welding. If beyond the time-sensitive period, the self-supporting film will lose weldability. This study is a significant advancement for the large-scale Ti3C2Tx MXene@rGo composites.
Study on the Effect of Pre-strain on Fatigue Properties of Dual-phase Steel
Authors: Li Yan , Xia Lei , Wang Keqiang , Su Hongying , Wang Xiaohang , Li Qihang , Wang Qing 
Published: August 2023

Abstract
The uniaxial tensile test investigated the fatigue performance of DP780 steel without pre-strain and with 5% and 10% uniaxial pre-strain. Topography of fractured surfaces was observed to study the relationship between pre-strain and fatigue performance. The results showed that pre-strain the specimens would affect the fatigue performance of DP780 steel. It would cause an increase in fatigue life when the stress was comparatively high and the fatigue life was less than 100,000 cycles. However, the fatigue life was reduced when the stress level was comparatively low, and the fatigue life was more than 100,000 cycles. Pre-strain reduced the fatigue strength of samples. Fatigue strength of specimens without pre-strain and 5% and 10% pre-strain were 318 MPa, 310 MPa, and 303 MPa, respectively. The sample fracture was a brittle fracture with a pre-strain of 5%, while it was a ductile fracture with a pre-strain of 10%.
Optimization of CF/PEKK molding process by orthogonal experiment
Authors: Cheng Zhitong , Qi Junwei , Wang Yuequan , Jin Jianghai 
Published: August 2023

Abstract
Composite materials have gradually entered people’s attention due to their advantages such as lightweight, high strength, corrosion resistance, fatigue resistance, and strong designability. Widely used in aviation, aerospace, automotive and other fields.[1-4].. The basic mechanical properties of the laminates were evaluated through short beam shear and bending tests. The optimum forming process was determined by orthogonal test: forming temperature 380°C, forming pressure 2 MPa, holding time 60 min, cooling rate 2°C/min. The interlaminar shear strength of this process was 103.42 MPa, and the bending strength was 1570 MPa
Research on Optimization Method of Configuration Number of Automatic Guided Vehicles and Transportation Sequence of Workpieces in Workshop
Authors: Xu Liyun , Ariel M.F Jonathan William , Zhou Zhuo , Qin Haoran 
Published: August 2023

Abstract
The number of automatic guided vehicles (AGVs) and the sequence of workpieces transported from the warehouse affect the final processing completion time of the system. Therefore, this paper researches the optimal configuration number of AGVs and sequence of transport workpieces in the workshop. Firstly, an optimization model is built with minimizing completion time. Secondly, Plant Simulation is used to determine the optimal configuration number of AGVs. Thirdly, linear sequence and uniform crossover, inversion, and exchange mutation are used to generate a new generation of populations, and a genetic algorithm (GA) is improved to optimize the transportation sequence of workpieces. Finally, an example verifies the effectiveness of the proposed method.
Constant Control of Tension Force Based on Fuzzy Proportion Integral Differential Algorithm
Authors: Wang TianXu 
Published: August 2023

Abstract
To overcome the problem that the tension of a diamond wire saw wire affects the surface quality of slices, the constant tension control of diamond wire saw wire is studied by using the Matlab software, and the wire saw tension is controlled by fuzzy PID (Proportion Integral Differential) algorithm and compared with classical PID control algorithm. The simulation data is obtained to verify the reliability and superiority of the fuzzy PID control algorithm.
Memory Performance Enhancement by Inducing Conductive Channel via Doping
Authors: He Hongyang , Li Tiejun , Lin Yuxiang , Yang Shuya , Li Maojing , Pan Jinyan 
Published: August 2023

Abstract
Due to the excellent nonvolatile resistance characteristics demonstrated by hafnium oxide, it is the potential to facilitate the use of resistive random access memory. In this paper, an ingenious method using doping to locate conductive channels is presented to improve the stable rheostatic performance of HfO2-based rheostatic memory. Metal particles are located to enhance the electric field locally to spur on conductive filaments in situ so that the resistive parameters Vset and Vreset are reduced, the relative fluctuation value (standard deviation/mean) of the Vset is reduced from 22.57% to 18.16%, and that of Vreset is reduced from 19.59% to 16.77%. Consequently, the device gains more stable resistance switching with a larger resistive window.