Advances in Mechanical Engineering最新文献_第7页

Simulation investigates on operation characteristics of free piston internal combustion generator 模拟研究自由活塞内燃发电机的运行特性

Advances in Mechanical Engineering Pub Date : 2023-11-01 DOI: 10.1177/16878132231213461

Meng Yubo, Yuchun Huang, Haishu Ma, Dong Yunfu, Li Long

引用次数: 0

A simulation analysis method for strength and fatigue design of prestressed wound ultra-high pressure vessels 预应力缠绕式超高压容器强度和疲劳设计的模拟分析方法

Advances in Mechanical Engineering Pub Date : 2023-11-01 DOI: 10.1177/16878132231209640

Lida Che, Peng Wang, Liliang Ma, Yuqi Feng, Jie Zhao, Xiangyang Li

{"title":"A simulation analysis method for strength and fatigue design of prestressed wound ultra-high pressure vessels","authors":"Lida Che, Peng Wang, Liliang Ma, Yuqi Feng, Jie Zhao, Xiangyang Li","doi":"10.1177/16878132231209640","DOIUrl":"https://doi.org/10.1177/16878132231209640","url":null,"abstract":"Pre-stressed steel wire-wound ultra-high-pressure vessels (PSWUPV) are commonly used in engineering to transport ultra-high-pressure media. However, the complex structure of these containers and the frequent pressure changes pose challenges in designing their structural and fatigue strength. Three simulation design methods were compared and analyzed: the two-dimensional force method, the two-dimensional cooling method, and the three-dimensional force method. The results showed that all three methods met the stress analysis requirements. The three-dimensional surface mass force method was chosen as the preferred method for engineering applications, specifically for the process of steel wire-winding loaded with mass force. The combined load case method was used to examine the influence of steel wires on the stress of the thick-walled cylinder when wound layer-by-layer. The study also focused on the changes in stress relaxation within the steel wire layer. The results demonstrated that the residual stresses of the core cylinder and the winding layer exhibited quasi-linear superposition during the winding and preloading process. The preloading effect of the steel wire weakened with increasing friction coefficient. Simulation results showed larger errors with excessively large or small normal stiffness coefficients. Based on theoretical solutions and verification studies, the optimal friction and normal stiffness coefficients were determined to be 0.02 and 1, respectively. By achieving a reasonable distribution of residual stress in the thick-walled cylinder of the ultra-high-pressure vessel through fatigue analysis, the fatigue life of the cylinder was significantly improved.","PeriodicalId":502561,"journal":{"name":"Advances in Mechanical Engineering","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139304526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Robustness in formation control of mobile robots using leader-follower method 使用领导者-跟随者方法实现移动机器人编队控制的鲁棒性

Advances in Mechanical Engineering Pub Date : 2023-11-01 DOI: 10.1177/16878132231209708

S. Oh-hara, Atsushi Fujimori

引用次数: 0

Experiment on the impact response of aluminum alloy wood core sandwich composites 铝合金木芯夹芯复合材料的冲击响应实验

Advances in Mechanical Engineering Pub Date : 2023-11-01 DOI: 10.1177/16878132231200410

Shusen Li, Yan Zhang

{"title":"Experiment on the impact response of aluminum alloy wood core sandwich composites","authors":"Shusen Li, Yan Zhang","doi":"10.1177/16878132231200410","DOIUrl":"https://doi.org/10.1177/16878132231200410","url":null,"abstract":"In this work, a protective structure with 2A12T4 aluminum alloy as the panel material and plywood as the core layer was designed. Penetration experiments were performed by firing multiple projectiles from a light gas gun. The impact behavior, damage mode, absorbed energy, and residual strength of the interlayer after impact were studied. The dynamic response and the failure of the interlayer were analyzed. Disbonding, fiber fracture, buckling, shear, and core fracture between the metal layer and the composite layer of the front panel were observed. The impact resistance of the sandwich plate was also studied. Based on the results of the experiments and numerical simulations, failure determination of the plywood core layer was achieved using the Hashin criterion, and a finite element model was established using ABAQUS software. High-speed impact testing was performed with a Hopkinson pressure bar. The stress–strain relationship under a high dynamic strain rate is given here, and the energy absorption efficiency under loading in different directions was analyzed. Finite element analysis of the representative volume elements in the wood microstructure was also carried out. The results reported here can be used to guide optimal design of sandwich structures suitable for use under high-speed impact conditions.","PeriodicalId":502561,"journal":{"name":"Advances in Mechanical Engineering","volume":"69 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139302727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of multiple weld repairs on fatigue strength of bogie frame of railroad vehicle 多重焊缝修补对轨道车辆转向架框架疲劳强度的影响

Advances in Mechanical Engineering Pub Date : 2023-11-01 DOI: 10.1177/16878132231213596

J. Seo, Hyun-Moo Hur, S. Kwon, Kyung-Ho Moon

{"title":"Effect of multiple weld repairs on fatigue strength of bogie frame of railroad vehicle","authors":"J. Seo, Hyun-Moo Hur, S. Kwon, Kyung-Ho Moon","doi":"10.1177/16878132231213596","DOIUrl":"https://doi.org/10.1177/16878132231213596","url":null,"abstract":"In the welded structure of railroad vehicles, the bogie frame requires a service life more than 25 years, cracks occur in the weld zone owing to the application of repetitive fatigue loading during operation. When cracks occur and propagate in the weld zone, they are removed through gouging, and gas metal arc welding is performed for repair. After the first weld repair, the second weld repair process is performed if crack is visible in the same area. In this study, the effects of repetitive repair welding on the fatigue characteristics were investigated using materials applied in railway vehicle structures. Three types of specimens (weld specimen, first weld repairs specimen, and second weld repairs specimen) were prepared, and fatigue and residual stress tests were performed. The results indicated that the weld specimen had the longest fatigue life, and the first weld repairs specimen had the shortest fatigue life. The fatigue life of the second weld repairs specimen was longer than that of the first weld repairs specimen. Residual stress tests and finite-element analysis results indicated that the first weld repairs specimen had the shortest fatigue life among the specimens tested, because the highest residual stress was generated.","PeriodicalId":502561,"journal":{"name":"Advances in Mechanical Engineering","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139298242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of a model for predicting the flash temperature in single asperity contact between TC4 titanium and Q235 steel 开发用于预测 TC4 钛和 Q235 钢之间单个表面接触的闪光温度的模型

Advances in Mechanical Engineering Pub Date : 2023-11-01 DOI: 10.1177/16878132231210358

H. Pan, Yang Zhang

{"title":"Development of a model for predicting the flash temperature in single asperity contact between TC4 titanium and Q235 steel","authors":"H. Pan, Yang Zhang","doi":"10.1177/16878132231210358","DOIUrl":"https://doi.org/10.1177/16878132231210358","url":null,"abstract":"The friction hot surfaces generated by metal under low-speed friction is the main potential ignition source for explosive atmosphere, while the friction flash temperature is often much higher than the bulk temperature under the same conditions. Then the first to reach the ignition temperature of the combustible gas is the bulk temperature of the hot surface or the flash temperature of the contact of the asperities, which is worth studying. In view of this, by establishing a friction model, this paper conducts an in-depth study on the flash temperature of the asperities contact between the of TC4 titanium alloy and Q235 steel at the friction conditions of low speed and low load. According to the Hertz contact theory, the contact process of a single pair of asperities and the calculation method of the maximum flash temperature are analyzed, and the maximum flash temperature value is calculated using two assumptions. Combined with regression analysis, the mathematical model of the flash temperature with load and relative velocity is obtained. Under the same conditions, the maximum bulk temperature and flash temperature are calculated, so as to study the real effective ignition source of the gas at the friction conditions of low speed and low load.","PeriodicalId":502561,"journal":{"name":"Advances in Mechanical Engineering","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139300562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic modeling of sliding joints based on transversely isotropic virtual material and deep neural network 基于横向各向同性虚拟材料和深度神经网络的滑动接头动态建模

Advances in Mechanical Engineering Pub Date : 2023-11-01 DOI: 10.1177/16878132231210378

Yichu Fan, Wei Zhang, Xiaoru Li, Jianmin Zhu, Zhiwen Huang

{"title":"Dynamic modeling of sliding joints based on transversely isotropic virtual material and deep neural network","authors":"Yichu Fan, Wei Zhang, Xiaoru Li, Jianmin Zhu, Zhiwen Huang","doi":"10.1177/16878132231210378","DOIUrl":"https://doi.org/10.1177/16878132231210378","url":null,"abstract":"Aiming at the problem that the current isotropic virtual material-based modeling method for dynamic modeling of sliding joints can hardly reflect the difference between normal and tangential mechanical properties, which restricts the modeling quality, a transversely isotropic material model is introduced to comprehensively describe the mechanical properties of sliding joints. Firstly, a dynamic model based on transversely isotropic virtual material and Deep Neural Network (DNN) is constructed to reflect the relationship between the dynamic parameters of transversely isotropic virtual material [Formula: see text] and the natural frequencies. Then, using the cuckoo search algorithm, the transversely isotropic virtual material parameters are determined. Subsequently, as an application case, the flat and V-guide joints of the M7120D/H surface grinder are employed to validate the proposed modeling method. Finally, compared to the experimental modal test results, the error of natural frequencies is less than 1%, which achieves high accuracy. Additionally, the quantitative comparison based on the same application case shows that the proposed modeling method is superior to isotropic virtual material and spring damping method.","PeriodicalId":502561,"journal":{"name":"Advances in Mechanical Engineering","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139294064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical study for bioconvection in Marangoni convective flow of Cross nanofluid with convective boundary conditions 带对流边界条件的 Cross 纳米流体马兰戈尼对流中的生物对流数值研究

Advances in Mechanical Engineering Pub Date : 2023-11-01 DOI: 10.1177/16878132231207625

M. Abbas, Nargis Khan

{"title":"Numerical study for bioconvection in Marangoni convective flow of Cross nanofluid with convective boundary conditions","authors":"M. Abbas, Nargis Khan","doi":"10.1177/16878132231207625","DOIUrl":"https://doi.org/10.1177/16878132231207625","url":null,"abstract":"The current study investigates incompressible, MHD flow of Cross nanofluid containing of gyrotactic microorganisms and thermophoretic particle deposition over a sheet with activation energy and variable thermal conductivity. The variable characteristic of thermal conductivity is considered as a linear function of temperature. The present study’s insights can optimize the design of nanofluid-based systems, enhance drug delivery methods, improve environmental monitoring, refine materials engineering, advance microfluidics for diagnostics, boost renewable energy technologies, and upgrade electronics cooling solutions. Moreover, this study contribution to scientific understanding will catalyze further research across disciplines, fostering innovation and progress. Cross nanofluid containing iron oxide [Formula: see text] nanoparticles, and based fluid ethylene glycol ([Formula: see text] is used. In the current study, distributions of concentration, temperature, mass, microorganisms, and flow are examined in the presence of nanofluid while also accounting for thermophoretic particle deposition and a heat source. The proposed flow equations are transmuted into ODEs by employing the suitable similarity variables. RKF-45th approach is used to evaluate the reduced equations. Graphs are used to determine the effects of important factors on thermal, microorganism, concentration, and flow profiles. With a rise in the Marangoni ratio parameter, the velocity distribution is enhanced, whereas the temperature distribution exhibit inverse behavior.","PeriodicalId":502561,"journal":{"name":"Advances in Mechanical Engineering","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139296437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on lubrication performance of engine piston skirt with bionic design 仿生设计发动机活塞裙润滑性能研究

Advances in Mechanical Engineering Pub Date : 2023-11-01 DOI: 10.1177/16878132231209252

Wu Bo, Zhang Song, Weijun Tian, Cong Qian

{"title":"Study on lubrication performance of engine piston skirt with bionic design","authors":"Wu Bo, Zhang Song, Weijun Tian, Cong Qian","doi":"10.1177/16878132231209252","DOIUrl":"https://doi.org/10.1177/16878132231209252","url":null,"abstract":"As the main friction pair of engine, the friction loss of piston-cylinder liner assembly in the working process has become the main reason of engine friction power consumption. Many species in the biological world have formed non-smooth forms of resistance reduction after thousands of years of survival and evolution. Many people have applied this non-smooth shape of drag reduction on organisms to the surface of friction pairs in construction machinery. Based on LX108 engine, the wear and erosion resistance of Scapharca subcrenata surface is applied to the piston skirt, which is the main friction pair in the engine. Nine test schemes were designed according to orthogonal test. This design selects three factors, namely, groove distribution type, groove depth and width, groove spacing, and each factor includes three levels. The macroscopic fluid lubrication state of the whole piston skirt with bionic shape is studied. Through the change of oil film thickness caused by thermal-mechanical coupling deformation of skirt, combined with the average Reynolds equation, the hydrodynamic pressure of lubricating oil, shear stress, and skirt friction force are obtained to verify the contribution of bionic shape to piston drag reduction, wear reduction, wetting increase, and friction power consumption. The simulation and test results show that the lubrication of all parts of the bionic groove piston skirt is better than that of the standard piston; When the depth and width of groove is 0.8 mm and the spacing is 10°, the thicker the oil film thickness of skirt is; The bionic piston whose oil film bearing area is 74%–87% of the standard piston has the smallest normal pressure and friction; When the upper end of the skirt is arranged with groove shape and the lower end is arranged with narrow groove shape between wide grooves, the lubrication effect is better.","PeriodicalId":502561,"journal":{"name":"Advances in Mechanical Engineering","volume":"73 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139305302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation and experiment on the effects and mechanism of variable-length restricted contact tool 变长受限接触工具的效果和机理的模拟与实验

Advances in Mechanical Engineering Pub Date : 2023-11-01 DOI: 10.1177/16878132231207823

Rujie Li, Peixuan Zhong, Yalong Zhang, Xueqin Pang

{"title":"Simulation and experiment on the effects and mechanism of variable-length restricted contact tool","authors":"Rujie Li, Peixuan Zhong, Yalong Zhang, Xueqin Pang","doi":"10.1177/16878132231207823","DOIUrl":"https://doi.org/10.1177/16878132231207823","url":null,"abstract":"Difficult-to-machine materials such as stainless steel are widely used in the construction industry, because of their excellent mechanical properties and corrosion resistance. However, the poor tool-chip contact environment, severe tool wear, and heavy chip accumulation inhibit the machining efficiency. In this paper, 316L austenitic stainless steel was selected to investigate the effect of a variable-length restricted contact tool (VL-RCT), aiming at reducing the cutting temperature and increasing the tool life. A finite element simulation model of restricted contact cutting was established to investigate the machining parameters and restricted contact parameters on cutting performances and to clarify the mechanism of the VL-RCT in the cutting process. Additionally, cutting experiments were conducted to verify the cutting process mechanism. The results showed that the variable restricted contact structure efficiently reduced the cutting force and cutting temperature and improved the cutting performances of austenitic stainless steel. Both numerical simulation and cutting experiments reported that the trapezoidal restricted contact structure improved the cutting performance the best. Accordingly, this research provided theoretical guidance for the optimization of tool structure and the selection of cutting parameters, as well as a solid foundation for the future development of relevant design theories and methods for high-performance tools.","PeriodicalId":502561,"journal":{"name":"Advances in Mechanical Engineering","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139305964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0