Engineering Research Express最新文献

{"title":"Microstructural and functional characterization of sintered fly ash","authors":"H. Sahoo, Prafulla Kumar Mallik, K. Barik","doi":"10.1088/2631-8695/ad6530","DOIUrl":"https://doi.org/10.1088/2631-8695/ad6530","url":null,"abstract":"\u0000 The utilization of industry by-products, such as fly ash, was investigated. However, the research results have yet to report the functional characteristics of fly ash. This paper deals with the processing, microstructure, and functional characterization of fly ash using a novel powder metallurgy method. The elemental composition, mineralogical phases, morphology phases, electrical and dielectric properties were determined by XRF, XRD, SEM, and impendence analyzer, respectively. The effect of additives on fly ash's microstructure and functional properties was studied. As a result, sintered fly ash possesses better microstructure and dielectric properties as a function of frequency and temperature. It is suggested that sintered fly ash can be utilized for electronic packaging and EMI shielding applications.","PeriodicalId":505725,"journal":{"name":"Engineering Research Express","volume":" 21","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141826088","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}

{"title":"Enhancing machining efficiency in hybrid metal matrix composites through EDM parameter optimization via grey relational analysis","authors":"Manu Khare, Ankit Sharma, Ashish Goyal, S. Jhamb","doi":"10.1088/2631-8695/ad652e","DOIUrl":"https://doi.org/10.1088/2631-8695/ad652e","url":null,"abstract":"\u0000 In summary, this study utilized stir casting to develop three distinct aluminum hybrid composites incorporating boron carbide and alumina. These composites were identified as Al7075 + 12%B4C + 6%Al2O3, Al7075 + 6%B4C + 6%Al2O3, and Al7075 + 6 %B4C + 12%Al2O3. The research focused on machining these composite materials using EDM and employed a Taguchi L27 orthogonal array design to plan the machining tests. Key process parameters considered were gap voltage (V), duty cycle (%), current (A), and different percentages of reinforcement content. The study applied Grey Relational Analysis to evaluate the impact of EDM machining process parameters on critical output responses, specifically material removal rate ( MRR ) and tool wear rate ( TWR ).","PeriodicalId":505725,"journal":{"name":"Engineering Research Express","volume":" 95","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141824478","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}

{"title":"Numerical experimental study on combined support of bolt-arch in circular roadway","authors":"Ning Yang, Donghao Li, Meixia Zhao, Weiteng Li","doi":"10.1088/2631-8695/ad64aa","DOIUrl":"https://doi.org/10.1088/2631-8695/ad64aa","url":null,"abstract":"\u0000 The deep soft rock roadway is in high stress environment, and the surrounding rock is prone to large deformation. Appropriate roadway cross-section form and high-strength support are effective control methods for surrounding rock deformation. Circular roadway is widely used in mine engineering because of its uniform stress and deformation, which gives full play to the characteristics of rock compression and non-tension. With the advantages of high strength, high cost performance and stability, the application of arch frame in deep soft rock roadway is increasing day by day. Based on this, based on the engineering background of deep roadway in extremely soft rock in sea area, numerical experiments were carried out using the FLAC3D bolt-arch fine numerical simulation platform. The progressive failure characteristics of bolt-arch combined support in soft rock roadway are revealed. The influence law of roadway section form, geostress grade and lateral pressure coefficient on support effect is clarified. The results show that: (1) Under the condition of deep soft rock, the surrounding rock deformation of circular roadway is uniform. Compared with the straight wall semi-circular roadway, the deformation is reduced by about 86% at most. (2) The failure of arch frame in circular roadway has a significant influence on the final control effect of surrounding rock. When the ground stress exceeds 15 MPa, the loss of bearing capacity of arch frame is instantaneous, and the deformation of surrounding rock increases suddenly. (3) When the support of circular roadway in deep soft rock fails, the axial force of bolt is very small, and it basically does not play a supporting role. According to the research results, the support optimization design is carried out, and the field verification is obtained.","PeriodicalId":505725,"journal":{"name":"Engineering Research Express","volume":" 26","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141829404","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}

{"title":"Analysis and design of compact dual-modebandpass filters based on modified CSRR withwide stopband for 5G sub-6 GHz mobilecommunications","authors":"Rachida Boufouss, A. Najid","doi":"10.1088/2631-8695/ad64ab","DOIUrl":"https://doi.org/10.1088/2631-8695/ad64ab","url":null,"abstract":"\u0000 In this paper, a dual-mode bandpass filter with a wide stopband based on modified complementary split-ring resonators for 5G sub-6 GHz mobile communications is presented. The non-magnetic resonant particle known as a complimentary split ring resonator is used with a host microstrip line with a series gap in order to obtain a bandpass response. Since a complementary split-ring resonator provides a narrow passband, a T-slot has been introduced in the middle of this resonator to obtain dual-mode behavior with controllable bandwidth. Moreover, a pair of stubs are added to the host microstrip line in order to achieve a wide stopband with good out-of-band rejection. The proposed resonator is analyzed, and a bandpass filter is designed to operate at 3.6 GHz to cover the 5G band from 3.4 to 3.8 GHz. The results show that the filter has a low insertion loss, good return loss, and a wide stopband up to 9 GHz with a compact size since its resonator offers a size of 0.1 λg × 0.14 λg where λg is the guided wavelength at 3.6 GHz.","PeriodicalId":505725,"journal":{"name":"Engineering Research Express","volume":" 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141828317","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}

{"title":"Designing efficient brain tumor classifier using hybrid EfficientNet-faster R-CNN deep learning model","authors":"Aashutosh Kharb, Prachi Chaudhary","doi":"10.1088/2631-8695/ad63fa","DOIUrl":"https://doi.org/10.1088/2631-8695/ad63fa","url":null,"abstract":"\u0000 Purpose: Brain tumors have historically posed a significant risk to individuals, potentially leading to fatality. However, in contemporary times, they have emerged as one of the most dangerous health issues affecting both children and adults. The effects of this phenomenon result in the unregulated proliferation of brain cells. Within the field of biological image processing, the utilisation of deep learning algorithms offers a distinct and unparalleled experience. The Convolutional Neural Network (CNN) is a pivotal component in brain tumor categorization applications. However, a notable limitation of CNNs is their extensive execution time, primarily attributed to the substantial number of trainable parameters involved. Methods: This study proposes a hybrid model for brain tumor classification that combines faster R-CNN and EfficientNet. The objective is to minimise the time required for classification without compromising accuracy. The data collection from Figshare was employed during the model's development. Results and Conclusion: The hybrid model proposed in this study demonstrates a notable accuracy of 98.96% during the training phase and 99.2% during the testing phase, surpassing the performance of both the EfficientNet model and the Faster R-CNN model when employed individually. The aforementioned findings were derived through a comparative analysis of the Hybrid model, the EfficientNet model, and the Faster R-CNN model.","PeriodicalId":505725,"journal":{"name":"Engineering Research Express","volume":"8 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141642752","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}

{"title":"Effect of R410a coolant on tool wear, dimensional deviation and surface roughness in turning of AISI 1045 steel","authors":"Gholamreza Khalaj, Mohammad-Javad Haghparast, Mohammad-Sadegh Salari, Alireza Motahari","doi":"10.1088/2631-8695/ad63f8","DOIUrl":"https://doi.org/10.1088/2631-8695/ad63f8","url":null,"abstract":"\u0000 Friction between the tool and the workpiece during machining operations always increases the tool wear rate. Removing this problem by using fluids and cooling the tools is essential. In this research, the effects of two cooling conditions: Water Soluble Cutting Oil (WSCO) fluid and R410a coolant, on the tool wear rate, dimensional deviation and surface roughness of AISI 1045 steel (CK45) in turning with a high-speed steel (HSS) tool were investigated. The selected parameters were cutting speeds of 15, 25, 40 and 55 m/min, cutting depths of 0.5, 1 and 1.5 mm and feed rates of 0.05, 0.12 and 0.2 mm/rev. The results show that cooling by R410a coolant reduces the tool wear rate due to its high cooling power and better temperature control at the cutting zone compared to WSCO fluid. Based on the minimums of tool wear, dimensional deviation and surface roughness in different conditions, using R410a coolant can increase the cutting speed by 60% from 25 to 40 m/min. Also, in the optimal condition at a cutting speed of 40 m/min, cutting depth of 1 mm and feed rate of 0.05 mm/rev., tool wear, dimensional deviation and surface roughness are reduced by up to 20, 6 and 10 times respectively. In the optimal condition, the dimensional deviation based on the diameter difference along 300 mm is reduced to 14 µm and also the tool wear rate and surface roughness after 60 min. of turning are reduced to 20 and 3.1 µm respectively. The effect of each input variable on tool wear, dimensional deviation and surface roughness was calculated by statistical analysis and was validated by ANOVA.","PeriodicalId":505725,"journal":{"name":"Engineering Research Express","volume":"80 13","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141643063","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}

{"title":"An experimental investigation of process parameters on material removal and surface roughness improvement in abrasive flow machining","authors":"Hari Om, Himmat Singh, Govind Vashishtha","doi":"10.1088/2631-8695/ad63f9","DOIUrl":"https://doi.org/10.1088/2631-8695/ad63f9","url":null,"abstract":"\u0000 Today, there is huge demand for mechanical components with long life cycles, and superior surface finishes as a result of the industrial revolution. New methods for nano-finishing complex structures, including abrasive flow machining (AFM), have been developed in response to the need for superior surface finish. This is a relatively new technique in non-conventional machining techniques. Because abrasion only happens in locations where flow is restricted, this approach is utilized to polish metallic parts as well as interior, inaccessible cavities, and recesses using a semi-liquid paste. It has evolved to flow of abrasives with a viscoelastic polymer (referred to as abrasive media) over complex geometries, and edges to deburr, and radius those surfaces. This paper focuses on investigating the impact of process parameters on material removal, and percentage improvement in surface roughness on cylindrical brass workpieces using Taguchi L9 orthogonal array, the number of cycles, extrusion pressure, and grit size of abrasives have been selected. The abrasive medium employed in this investigation is composed of a blend of polymer, hydrocarbon gel, and aluminium oxide abrasive particles with varying grit sizes. The outcome shows which process parameters to optimize for material removal, and improvement in percentage improvement in surface roughness. The number of cycles that have the largest percentage contribution to material removal was 83.74%. For the response material removal, the percentage contributions of the abrasive particle grit size, and extrusion pressure are 2.03%, and 14.16%, respectively. N2P2G3 has the optimal level used for material removal. The largest percentage contribution to improvement in surface roughness, or 83.48%, was the result of the number of cycles. Extrusion pressure, and abrasive particle grit size account for 7.38%, and 8.88% of the total percentage contribution, respectively. N3P2G3 has the optimal level obtained for percentage improvement in surface roughness improvement.","PeriodicalId":505725,"journal":{"name":"Engineering Research Express","volume":"4 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141641176","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}

{"title":"Effect of applied load on wear of microwave sintered alumina-graphene ceramic composite material","authors":"K. I. V. Vandana, M. Rajyalakshmi, Sri Chaitanya Ch","doi":"10.1088/2631-8695/ad63fb","DOIUrl":"https://doi.org/10.1088/2631-8695/ad63fb","url":null,"abstract":"\u0000 Ceramic materials are of technical and commercial importance and can meet many engineering requirements owing to their thermal, chemical and mechanical performance. Due to its high density and hardness, alumina (Al2O3) is one of the main materials in this category that can be used to produce critical parts. An example of such an application is wear and abrasion resistance. The fabrication root technique and a suitable secondary reinforcement material can enhance a ceramic's wear characteristics. Hence the present work is mainly concentrated on the preparation of alumina ceramic composite material reinforced with different weight proportions of graphene ranging from 0.15wt% to 0.45 wt% (with an interval of 0.1) and fabrication through microwave sintering method. Wear studies are performed on graphene reinforced alumina ceramic material samples using pin-on-disk apparatus at different loads of 5N, 10N, 15N keeping speed of 0.8 m/sec and sliding distance of 40 m constant. The obtained wear results are compared with wear performance of pure alumina samples which are prepared in the same condition. Wear tests even at higher load of 15N revealed that the decrease in wear rate of the composite samples reinforced with 0.35 wt% of grapheme is 35.14% and in the composite samples reinforced with 0.45 wt% of graphene is 34.85% when compared with wear rate of monolithic alumina samples. The effect of different wt%s of graphene on wear properties of obtained ceramic composite is also studied through SEM analysis.","PeriodicalId":505725,"journal":{"name":"Engineering Research Express","volume":"6 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141641955","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}

{"title":"Optimization of Process Parameter in Micro Electrochemical Machining using Topsis Technique with Analytical Hierarchy Process (AHP)","authors":"SIVA M, N. Arunkumar, Ganesh M, Sathishkumar Natesan","doi":"10.1088/2631-8695/ad63f7","DOIUrl":"https://doi.org/10.1088/2631-8695/ad63f7","url":null,"abstract":"\u0000 Electro-chemical machining (ECM) is one of the extensively used unconventional machining processes employed in industries to machine difficult-to-machine materials such as super alloys, titanium alloys, stainless steel, etc. It does not impart any mechanical stresses on the workpiece. The primary requirement of the work material used in this process should be electrically conductive materials. In favour of these characteristics, Hastelloy C276 is used as a work material because it exhibits excellent physical properties over cast iron. Generally, the quality of machining mostly relies on the electrolyte (mmol/L), feed rate (mm/rev), and duty ratio. These credential parameters are considered in this present work to enhance the machining quality, such as circularity, taper angle, and metal removal rate (MRR). The Taguchi L9 orthogonal array is used to learn machining behaviour under various circumstances. And this time, an Analytic Hierarchy Process (AHP) is used to allocate the weight for each response in the TOPSIS multi-criteria decision-making method. According to the findings, sodium nitrate (NaNo3) has a higher metal removal rate than sodium chloride (NaCl) and sodium bromide (NaBr). It will, however, result in a low-quality hole. The taper angle is inversely proportional to the feed rate.","PeriodicalId":505725,"journal":{"name":"Engineering Research Express","volume":"11 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141641237","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}

{"title":"Event-triggered Based Adjustable Containment Control Scheme Design for Multi-agent Systems","authors":"Mengyi Jiang, Yonghui Yang, Chuang Gao, Anatolii K. Pogodaev","doi":"10.1088/2631-8695/ad63f6","DOIUrl":"https://doi.org/10.1088/2631-8695/ad63f6","url":null,"abstract":"\u0000 The traditional containment control problem uses a mapping method with a fixed communication topology to generate a set of reference signals for followers, which may lead to a situation where the position of the reference signal cannot be adjusted and causes collisions. Therefore, based on backstepping theory, we propose a novel containment control scheme to address this problem, where the generated reference signals can be adjusted arbitrarily. In particular, it is important to point out that an estimator is designed to guide the follower if the reference signal is not available, so that the collision problem is avoided. In addition, the computational complexity of the controller is also reduced and the communication resources are saved by introducing the command filters and event-triggered mechanism. It is proved that the tracking errors of the closed multi-agent systems are uniformly and ultimately bounded through Lyapunov theory. Finally, experimental simulations verify that the proposed control scheme is reasonable and effective. Furthermore, the proposed scheme provides a more flexible solution for containment control studies, especially for collision avoidance research of multi-agents.","PeriodicalId":505725,"journal":{"name":"Engineering Research Express","volume":"9 20","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141640617","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}