Engineering Research Express最新文献

A quantitative hot tearing criterion for aluminum alloys 铝合金热撕裂定量标准

Engineering Research Express Pub Date : 2024-08-09 DOI: 10.1088/2631-8695/ad6db9

Majid Bagheri, Mostafa Alizadeh, Alireza Ahmadi, M. Hajizamani

引用次数: 0

An improved prairie dog optimization algorithm integrating multiple strategies and its application 集成多种策略的改进型草原犬优化算法及其应用

Engineering Research Express Pub Date : 2024-08-08 DOI: 10.1088/2631-8695/ad6d2e

Yan Wang, Nan Wang, teng gao, FanYang Bu, xiqian zhu

{"title":"An improved prairie dog optimization algorithm integrating multiple strategies and its application","authors":"Yan Wang, Nan Wang, teng gao, FanYang Bu, xiqian zhu","doi":"10.1088/2631-8695/ad6d2e","DOIUrl":"https://doi.org/10.1088/2631-8695/ad6d2e","url":null,"abstract":"\u0000 Aiming at the problems in prairie dog optimization (PDO), such as uneven population distribution at initialization, slow convergence, imbalance between global exploration and local exploitation, and the tendency to get trapped in the local optimum, this study proposes an Improved prairie dog optimisation algorithm integrating multiple strategies (IMSPDO). Firstly, the population is initialized using spatial pyramid matching (SPM) chaotic mapping combined with improved random opposition-based learning (IROL) to solve the problems of uneven distribution and poor diversity of the population. Secondly, the prey escapes energy formula mentioned in the harris hawks optimization (HHO) is introduced to achieve the smooth transition between the exploration phase and the exploitation phase, balancing the algorithm's global exploration capability and local exploitation capability. Additionally, the idea of the particle swarm optimization (PSO) is applied to enhance the global optimization capability of the algorithm. Finally, the ideas of simulated annealing (SA), polynomial mutation and Cauchy mutation are also introduced to improve the ability that individuals to jump out of the local optimum. The performance of the improved algorithm is verified on a set of 21 classical benchmark functions and 8 CEC2020 test functions. The proposed IMSPDO is also evaluated against original PDO, and six other commonly used algorithms. The result of the Wilcoxon rank-sum test shows that there is a significant difference between the selected algorithms and IMSPDO. Furthermore, 3 engineering examples are used to further test the superiority of IMSPDO in dealing with real-world problems.","PeriodicalId":505725,"journal":{"name":"Engineering Research Express","volume":"56 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141928801","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 Fishbone powder and Carbon-Jute fiber reinforced unsaturated polyester based Novel Green composites: Investigation of tensile, impact strength, and morphology microstructure 开发基于鱼骨粉和碳-黄麻纤维增强不饱和聚酯的新型绿色复合材料：拉伸、冲击强度和形态微结构研究

Engineering Research Express Pub Date : 2024-08-08 DOI: 10.1088/2631-8695/ad6d31

Iti Dikshit, R. Singh, Gurminder Singh, Neeraj Sharma

{"title":"Development of Fishbone powder and Carbon-Jute fiber reinforced unsaturated polyester based Novel Green composites: Investigation of tensile, impact strength, and morphology microstructure","authors":"Iti Dikshit, R. Singh, Gurminder Singh, Neeraj Sharma","doi":"10.1088/2631-8695/ad6d31","DOIUrl":"https://doi.org/10.1088/2631-8695/ad6d31","url":null,"abstract":"\u0000 In the last decade, hybrid composites have been the subject of significant advancements and study. This fast expansion necessitated the development of lightweight composite material with enhanced mechanical strength. In the past few years, the utilization of organic wastes from the food industry, like powder from cow bone, pig bone, and fishbone, has substantially improved the mechanical characteristics of composite materials. Owing to the increasing growth of the meat-based fisheries industry, fish bones are readily available. These bones are often thrown, causing environmental damage. Hence, a sustainable and unique hybrid composite was created employing fish bone powder (FBP) as filler in carbon/jute fibers reinforced polyester matrix. The hybrid composite was compression-molded. FTIR, SEM, and EDS studies were used to characterize the composite. The ASTM standard was used as a reference to explore the mechanical strength (tensile and impact). Additionally explored are the effects of alkali treatment of jute fiber on the above-mentioned processes. It was revealed that the inclusion of FBP and alkali treatment enhanced the mechanical characteristics of the composite. Fishbone powder with a particle size range of 200-250 µm and a weight percentage of 10 to 15% had significant fiber attachment which resulted in improved strength. The produced green composites have proven to be a viable choice for bio-waste treatment in the food sector.","PeriodicalId":505725,"journal":{"name":"Engineering Research Express","volume":"57 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141929200","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

Design of an active wing-folding biomimetic flapping-wing air vehicle 设计主动折翼仿生拍翼飞行器

Engineering Research Express Pub Date : 2024-08-08 DOI: 10.1088/2631-8695/ad6d30

Y. Zhu, Longhua Zou, Huyue Zhuang, Hao Liu, Pingxia Zhang, Guangyao Zhou

{"title":"Design of an active wing-folding biomimetic flapping-wing air vehicle","authors":"Y. Zhu, Longhua Zou, Huyue Zhuang, Hao Liu, Pingxia Zhang, Guangyao Zhou","doi":"10.1088/2631-8695/ad6d30","DOIUrl":"https://doi.org/10.1088/2631-8695/ad6d30","url":null,"abstract":"\u0000 \"In nature, birds and bats dynamically alter their wing shapes to suit various flight environments and tasks. This paper focuses on the design and validation of a biomimetic flapping-wing aerial vehicle, named FlexiWing, which features a unique mechanism for active wing deformation. This mechanism allows the wings to adjust their shapes flexibly in response to flight demands, significantly enhancing attitude control and maneuverability.\" \"This study began with an in-depth exploration of biomimetic principles, focusing particularly on how birds and bats achieve precise control during flight through active wing deformation. Subsequently, we present a detailed account of the design and fabrication process of the active folding biomimetic flapping-wing aerial vehicle, including the design of mechanical mechanisms and material selection. Utilizing lightweight nylon materials and hollow carbon fiber rods, we successfully constructed a mechanically foldable wing structure. To achieve precise control over the aircraft's movement, an embedded control system was designed, comprising an onboard embedded flight controller and ground-based equipment. The onboard controller uses a high-performance ESP32-C3 processor and a JY901 inertial measurement unit to acquire real-time attitude information of the aircraft. The control system incorporates Wi-Fi communication technology, enabling operators to send commands via a remote control or personal computer to manage flight modes and attitudes. Ultimately, a series of flight experiments were conducted to validate the performance of FlexiWing. The results demonstrate that FlexiWing exhibits remarkable maneuverability and stability, capable of achieving high-precision attitude control through active wing folding, making it adaptable to complex environments and tasks.\"","PeriodicalId":505725,"journal":{"name":"Engineering Research Express","volume":"98 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141926503","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

Parametric modeling of resin-bonded sand mold systems using machine learning-based approaches 利用基于机器学习的方法对树脂粘结砂模系统进行参数建模

Engineering Research Express Pub Date : 2024-08-08 DOI: 10.1088/2631-8695/ad6d2f

P. Samal, Kanhu Charan Khadanga, Surekha B, P. Vundavilli

{"title":"Parametric modeling of resin-bonded sand mold systems using machine learning-based approaches","authors":"P. Samal, Kanhu Charan Khadanga, Surekha B, P. Vundavilli","doi":"10.1088/2631-8695/ad6d2f","DOIUrl":"https://doi.org/10.1088/2631-8695/ad6d2f","url":null,"abstract":"\u0000 This study presents the experimental investigations on modeling of the compression strength and permeability of the resin-bonded sand mold system through Machine Learning approaches. The process of constructing the Fuzzy Logic system was automated by utilizing a data-base and rule-base optimized through genetic algorithms, and the recorded datasets. This research employed three AI models, namely Artificial Neural Networks (ANN), Decision Tree (DT), and Random Forests (RF), using the datasets produced by the GA-tuned Fuzzy model. The objective of this study was to assess and compare the predictive capabilities of three different AI models (Artificial Neural Networks, Decision Tree, and Random Forests) in terms of predicting the values of Compression Strength and Permeability. The complete dataset was divided into two separate subsets, referred to as training data and testing data. Based on the findings, it appears that Random Forest (RF) model exhibits promising potential in accurately predicting the desired mold qualities. The model achieved a high R2 value of 0.9487, indicating a strong correlation with the target values. Additionally, the model demonstrated impressively low Mean Squared Error (MSE) and Mean Absolute Error (MAE) values of 117 and 17.6 points, respectively. Expanding the dataset size may further enhance the efficacy of the models.","PeriodicalId":505725,"journal":{"name":"Engineering Research Express","volume":"118 17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141926230","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

Preparation and Performance of Hydrotalcite and Montmorillonite Composite as Flame Retardant in Asphalt Pavement 作为沥青路面阻燃剂的水滑石和蒙脱石复合材料的制备及其性能

Engineering Research Express Pub Date : 2024-08-08 DOI: 10.1088/2631-8695/ad6d2d

Ning Tang, Yi-yu Jiang, Limei Wu, Yi-han Sun

引用次数: 0

Field monitoring and numerical simulation for force characteristics of pipe jacking in deep buried moderately weathered slate 对深埋中风化板岩中的顶管动力特性进行实地监测和数值模拟

Engineering Research Express Pub Date : 2024-08-08 DOI: 10.1088/2631-8695/ad681e

Shuang Zheng, Zhimin Luo, Chuanqi Wang, Yongjie Zhang

{"title":"Field monitoring and numerical simulation for force characteristics of pipe jacking in deep buried moderately weathered slate","authors":"Shuang Zheng, Zhimin Luo, Chuanqi Wang, Yongjie Zhang","doi":"10.1088/2631-8695/ad681e","DOIUrl":"https://doi.org/10.1088/2631-8695/ad681e","url":null,"abstract":"\u0000 Understanding the force characteristics of pipe jacking in rock formations is crucial for ensuring the stability of the structure and construction safety during construction. Yet, very little is explored about its characteristics in rock formations of pipe jacking. This paper presents a case study of constructing a deeply buried moderately weathered slate sewage pipeline using pipe jacking method in Changsha, China. To this end, we propose a novel method to combine field monitoring and numerical simulation representation in an efficacious way. Field monitoring was conducted to investigate the spatial distribution characteristics of jacking force, axial stress, and hoop stress in moderately weathered slate. Numerical simulation methods were employed to discuss the influences of several factors on pipe stress: the pipe-rock contact area, contact relationships at pipe joint interfaces, the height of the jacking force position, and the depth of pipe burial. The results show that hand shield is influenced by the excavation technology, and the distribution of jacking force exhibits a stepped or oscillating upward pattern in moderately weathered slate. The maximum axial stress occurs at the mid-span position of the arched roof of pipe at 30 MPa. Hoop stresses are dominated by compressive stresses with the maximum at-8 MPa. As the pipe burial depth increases, so does the axial stress on the pipe. Lower positioning of the jacking force heightens this stress effect. A larger pipe-rock contact area correlates with reduced axial stress levels. The weakening of the contact interface between pipe joints minimally affects axial stress, as stress primarily transmits through non-weakened areas. To ensure the reliability of the data, automatic monitoring and measuring instruments calibrated for on-site monitoring are used. The results of this study can provide beneficial guidance for the design and construction of pipe jacking.","PeriodicalId":505725,"journal":{"name":"Engineering Research Express","volume":"19 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141925815","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

Robust Left-Right Hashing Scheme for Ubiquitous Computing 面向泛在计算的稳健左右散列方案

Engineering Research Express Pub Date : 2024-08-08 DOI: 10.1088/2631-8695/ad6d2a

Rajeev Ranjan Kumar Tripathi, Pradeep Kumar Singh, Sarvpal Singh

{"title":"Robust Left-Right Hashing Scheme for Ubiquitous Computing","authors":"Rajeev Ranjan Kumar Tripathi, Pradeep Kumar Singh, Sarvpal Singh","doi":"10.1088/2631-8695/ad6d2a","DOIUrl":"https://doi.org/10.1088/2631-8695/ad6d2a","url":null,"abstract":"\u0000 Ubiquitous computing systems possess the capability to collect and process data, which is subsequently shared with other devices. These systems encounter resource challenges such as memory constraints, processor speed limitations, power consumption considerations, and the availability of data storage. Therefore, maintaining data access and query processing speed in ubiquitous computing is challenging. Hashing is crucial to search operations and has caught the interest of many researchers. Several hashing techniques have been proposed and Cuckoo Hashing is found efficient to use in several applications. There are two variants of Cuckoo Hashing: Parallel Cuckoo Hashing and Sequential Cuckoo Hashing. Cuckoo Hashing suffers from challenges like high insertion latency, inefficient memory usage, and data migration. This paper proposes two hashing schemes: Left Right Hashing and Robust Left Right Hashing that successfully address and solve the major challenges of Sequential Cuckoo Hashing. The proposed schemes adopt the Combinatorial Hashing technique after modification and use this with a new collision resolution technique called Left Right Random Probing. Left Right Random Probing is a variant of random probing and uses prime numbers and Fibonacci numbers. In addition, this paper proposes a new performance indicator, degree of dexterity to estimate the performance of hashing techniques. Sequential Cuckoo Hashing suffers from hidden switching costs which are identified and its estimation is given by a new performance indicator called, T.R.C./Key. Performance of Sequential Cuckoo Hashing is order dependent.","PeriodicalId":505725,"journal":{"name":"Engineering Research Express","volume":"24 20","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141926988","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

Die Design Optimization for Connecting Rod Using Simulation Modeling and Taguchi Methodology 利用仿真建模和田口方法优化连杆的模具设计

Engineering Research Express Pub Date : 2024-08-08 DOI: 10.1088/2631-8695/ad6d2b

Siddharth Yadav, S. Gautam, Rajat Upadhyaya, Niranjan Kumar Singh, Kamlesh Kumar Singh, Anurag Namdev

{"title":"Die Design Optimization for Connecting Rod Using Simulation Modeling and Taguchi Methodology","authors":"Siddharth Yadav, S. Gautam, Rajat Upadhyaya, Niranjan Kumar Singh, Kamlesh Kumar Singh, Anurag Namdev","doi":"10.1088/2631-8695/ad6d2b","DOIUrl":"https://doi.org/10.1088/2631-8695/ad6d2b","url":null,"abstract":"\u0000 This paper presents a novel approach to optimizing the die design for forging used in connecting rods. The combination of Taguchi (orthogonal L9) and the finite element method (FEM) was employed to achieve this optimization. The main objective of this study was to analyze the impact of design parameters on die-filling and yield improvement. The orthogonal L9 design was generated with three input parameters and one response variable. These input parameters were derived from the design dimensions of the forging tool, specifically flash land, draft, and flash thickness. The response variable was the maximum yield percentage, which was obtained through finite element simulations of the forging processes. By conducting an orthogonal analysis, the relationships between the response variable and the input parameters were established. The simulation results were then used to compare the outcomes of two different designs. It was found that Preform one outperformed the other design, achieving an impressive yield of 88% at a forging load of 1.37 × 104 N, with complete die filling observed.","PeriodicalId":505725,"journal":{"name":"Engineering Research Express","volume":"27 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141928437","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

Characterization and electrochemical performance of plasma-nitrided titanium alloy for bipolar plates 双极板用等离子氮化钛合金的特性和电化学性能

Engineering Research Express Pub Date : 2024-07-26 DOI: 10.1088/2631-8695/ad681c

Hongyu Shen, Liang Wang

{"title":"Characterization and electrochemical performance of plasma-nitrided titanium alloy for bipolar plates","authors":"Hongyu Shen, Liang Wang","doi":"10.1088/2631-8695/ad681c","DOIUrl":"https://doi.org/10.1088/2631-8695/ad681c","url":null,"abstract":"\u0000 Ti-N layer with a thickness about 1~2.2 μm was formed on titanium alloys through plasma nitriding at 750 °C in NH3 and a mixture of NH3 and N2 (1:2) for 4 h. SEM and XRD were employed to characterize the microstructure and phase composition of nitrided layer. Electrochemical tests evaluated the anti-corrosion properties of the samples before and after nitrided in a simulated proton exchange membrane fuel cells (PEMFC) environment. Interface contact resistance (ICR) was also measured. Results indicated that the corrosion potential in cathodic conditions was increased from -415 mV for untreated titanium to 148 mV for that nitrided in mixture gas. While, the corrosion current density was reduced from 6.64 A to 0.86A. Under a pressure of 140 N/cm², the interfacial contact resistance of the untreated sample increased from 22.1 mΩ cm2 before corrosion testing to 40.5 mΩ cm2 after corrosion at cathodic conditions. The nitrided sample, on the other hand, saw its contact resistance rise from 4.5 mΩ cm2 before corrosion to 7.3 mΩ cm2 after corrosion. The Ti-N compound layer effectively diminished the corrosion current density and sustained an exceptionally low ICR under the simulated operating conditions of a bipolar plate.","PeriodicalId":505725,"journal":{"name":"Engineering Research Express","volume":"19 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141801697","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