Journal of The Brazilian Society of Mechanical Sciences and Engineering最新文献_第3页

Optimized design of car frontal bumper with aluminum foam sandwich structure under low velocity impacts 低速撞击下的铝泡沫夹层结构汽车前保险杠优化设计

IF 2.2 4区工程技术

Journal of The Brazilian Society of Mechanical Sciences and Engineering Pub Date : 2024-09-06 DOI: 10.1007/s40430-024-05177-2

Ali Afrasiabi, Hossein Mohammadi, Kamyar Hashemnia

{"title":"Optimized design of car frontal bumper with aluminum foam sandwich structure under low velocity impacts","authors":"Ali Afrasiabi, Hossein Mohammadi, Kamyar Hashemnia","doi":"10.1007/s40430-024-05177-2","DOIUrl":"https://doi.org/10.1007/s40430-024-05177-2","url":null,"abstract":"This study introduces a novel sandwich structure absorber for car bumpers, utilizing thin layers of aluminium foam. This absorber improves energy absorption and impact resistance. This research compares the novel absorber to a conventional polymer-integrated model, by examining impact force, von-Mises stress, equivalent plastic strain, energy absorption, and coefficient of restitution. Utilizing the finite element method, the effects of shell density and thickness are analysed under E.C.E-R042 low-velocity impact standards. Sandwich absorbers exhibit lower stresses and plastic strains in the core. In addition, they demonstrate smaller impact forces and enhanced energy absorption within a specific range of shell densities. Furthermore, the absorber’s flexibility strongly influences contact time. The core of sandwich absorber models accounts for between 70 and 90% of energy absorption, indicating slightly lower energy absorption than polymer foams. The simulation results are analysed using analysis of variance to investigate the combined effect of the density and thickness of the sandwich absorber shell on the efficiency of the sandwich absorber. The optimal values of density and thickness are determined using grey relation analysis to be 150 kg/m3 and 25 mm, respectively.","PeriodicalId":17252,"journal":{"name":"Journal of The Brazilian Society of Mechanical Sciences and Engineering","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142226974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Machining performance of Al3003 alloy during ultrasonic vibration-assisted turning 超声波振动辅助车削过程中 Al3003 合金的加工性能

IF 2.2 4区工程技术

Journal of The Brazilian Society of Mechanical Sciences and Engineering Pub Date : 2024-09-06 DOI: 10.1007/s40430-024-05179-0

Neeraj Deswal, Ravi Kant

{"title":"Machining performance of Al3003 alloy during ultrasonic vibration-assisted turning","authors":"Neeraj Deswal, Ravi Kant","doi":"10.1007/s40430-024-05179-0","DOIUrl":"https://doi.org/10.1007/s40430-024-05179-0","url":null,"abstract":"Ultrasonic vibration-assisted turning (UVAT) is emerged to obtain improved machining performance during the machining process. In this article, experimental work is conducted to analyze machining performance during the conventional turning (CT) and UVAT operations for aluminum 3003 alloy. The microhardness, chip morphology, microstructure, machining temperature, surface roughness, cutting force, tool wear, machined surface damage, corrosion behavior, and residual stresses are analyzed and compared between CT and UVAT. Outcomes revealed that compared to CT, lesser machining force, lesser tool wear, higher temperature, lesser roughness, and lesser surface defects are observed during the UVAT operation. Segmentation, higher thickness, and cracks in chips are obtained for the CT operation whereas negligible chip segmentation, smaller chip thickness, smooth chips, and crack-free chips are observed for the UVAT operation. More grain refinement in microstructure is observed, and higher microhardness is obtained for the UVAT operation compared to the base material (BM) and the CT operation. Compressive residual stresses are attained in UVAT than tensile residual stresses for CT. The corrosion resistance is improved to about 55% in the UVAT operation than the CT operation. The outcomes showed that the machining performance of aluminum alloy is enhanced for UVAT compared with CT.","PeriodicalId":17252,"journal":{"name":"Journal of The Brazilian Society of Mechanical Sciences and Engineering","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Energy coupling-based double-pendulum variable rope length underactuated control for quadrotor UAV with slung load 基于能量耦合的双摆可变绳长欠动控制，适用于带悬挂负载的四旋翼无人机

IF 2.2 4区工程技术

Journal of The Brazilian Society of Mechanical Sciences and Engineering Pub Date : 2024-09-06 DOI: 10.1007/s40430-024-05173-6

Chunguang Wang, Bo Fan, Yi Zhao, Yifan Zhang, Lifan Sun

引用次数: 0

Assessment of sharpening profile effects on the efficiency of cutting tools for tire recycling: a numerical study 评估刃磨轮廓对轮胎回收利用刀具效率的影响：数值研究

IF 2.2 4区工程技术

Journal of The Brazilian Society of Mechanical Sciences and Engineering Pub Date : 2024-09-05 DOI: 10.1007/s40430-024-05172-7

Leydi Julieta Cárdenas, Duberney Hincapié, Luis Ruiz Pineda, Leonel Alveyro Teran

{"title":"Assessment of sharpening profile effects on the efficiency of cutting tools for tire recycling: a numerical study","authors":"Leydi Julieta Cárdenas, Duberney Hincapié, Luis Ruiz Pineda, Leonel Alveyro Teran","doi":"10.1007/s40430-024-05172-7","DOIUrl":"https://doi.org/10.1007/s40430-024-05172-7","url":null,"abstract":"The transportation of end-of-life tires (ELT’s) from waste collection points to recycling facilities represents one of the major challenges in the recycling process. As a whole piece, the ELT’s occupy a large volume, resulting in high costs and delays in transportation. Therefore, a precutting process at collection points would significantly reduce the space occupied by whole tires and improve their transport. Cutting procedures are crucial, and the devices for this operation must be optimized to minimize energy consumption. This study focuses on the numerical evaluation of nine blade profiles using explicit 3D simulations. The simulations applied the third-order Ogden hyperelastic model to evaluate the large deformations of rubber used in tire manufacturing. The numerical results were analyzed in terms of the force and work done, to identify the profile with the best performance. Among the profiles evaluated, it was found that the sharp profiles had better characteristics, while the hollow profiles were very effective. In addition, experimental rubber cutting tests were conducted using a universal testing machine. Two geometries, including the hollow profile obtained from the numerical simulation, were manufactured and applied to validate the simulations. The findings showed that the hollow profile reduced a 68% of the work done compared to the straight one, which is the profile most commonly used to manufacture these tools.","PeriodicalId":17252,"journal":{"name":"Journal of The Brazilian Society of Mechanical Sciences and Engineering","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A comparative study of the predictive capability of multiaxial stress-based fatigue criteria 基于多轴应力的疲劳标准预测能力比较研究

IF 2.2 4区工程技术

Journal of The Brazilian Society of Mechanical Sciences and Engineering Pub Date : 2024-09-04 DOI: 10.1007/s40430-024-05140-1

Thiago Abreu Peixoto, Tiago Lima Castro, Marcos Venicius Pereira, Fathi Aref Darwish, Bruno Felix de Carvalho

{"title":"A comparative study of the predictive capability of multiaxial stress-based fatigue criteria","authors":"Thiago Abreu Peixoto, Tiago Lima Castro, Marcos Venicius Pereira, Fathi Aref Darwish, Bruno Felix de Carvalho","doi":"10.1007/s40430-024-05140-1","DOIUrl":"https://doi.org/10.1007/s40430-024-05140-1","url":null,"abstract":"A comparative study is made of the predictive capability of a number of critical plane-based criteria, namely Findley (F), Matake (M), Susmel & Lazzarin (S&L), Carpinteri & Spagnoli (C&S) and Liu & Mahadevan (L&M), as well as a mesoscopic scale-based model proposed by Papadopoulos (P). Such criteria were applied to a set of published loading conditions which correspond to fatigue resistance limits involving synchronous sinusoidal in-phase and out-of-phase bending and torsion. The predictive capabilities associated with the application of these models were evaluated based on the respective error indices, which measure the deviation of such predictions with respect to their experimentally observed values within an infinite-life context. Assessment of the overall predictive capability, involving the totality of the 65 loading conditions considered in this work, is then presented in the form of frequency histograms, exhibiting the dispersion of the error index for each of the criteria in question. Accordingly, one could verify that the predictive capability of the Papadopoulos criterion is generally superior to those corresponding to the critical plane-based models involved in this study. Finally, the influence of specific loading parameters such as mean normal stress and mean shear stress on the degree of dispersion in the frequency histograms is presented and discussed.","PeriodicalId":17252,"journal":{"name":"Journal of The Brazilian Society of Mechanical Sciences and Engineering","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced vibration separation technique for fault diagnosis of sun gear 用于太阳齿轮故障诊断的增强型振动分离技术

IF 2.2 4区工程技术

Journal of The Brazilian Society of Mechanical Sciences and Engineering Pub Date : 2024-09-04 DOI: 10.1007/s40430-024-05155-8

Changliang Liu, Shaokang Liu, Weiliang Liu, Shuai Liu, Yingjie Wu, Ziqi Wang, Zhihong Luo

{"title":"Enhanced vibration separation technique for fault diagnosis of sun gear","authors":"Changliang Liu, Shaokang Liu, Weiliang Liu, Shuai Liu, Yingjie Wu, Ziqi Wang, Zhihong Luo","doi":"10.1007/s40430-024-05155-8","DOIUrl":"https://doi.org/10.1007/s40430-024-05155-8","url":null,"abstract":"The complex structure of a planetary gearbox weakens the gear fault characteristics in measurement signals. Vibration separation (VS) technology can address this problem by eliminating the impact of time-varying transfer paths on the signal. However, existing methods for determining the first window position (FWP) of VS are not highly accurate. To address this issue, a novel method for determining the FWP has been proposed in this paper, thereby creating an enhanced VS (EVS) technology. First, the envelope signal, which contains the amplitude-modulated signal (AMS) due to time-varying transfer paths, is separated using a zero-phase bandpass filter and Hilbert transform. Then, adaptive chirp mode decomposition is employed to accurately estimate a harmonic of the AMS. A sequence is formed by identifying the maximum points of the harmonic signal, indicating the moments when the planetary gear passes beneath the accelerometer. Finally, the VS method is applied based on the selected FWP. The results from both simulation and experimental signal analyses indicate that the FWP error of the EVS method (1.57%) is lower than the errors (1.83, 20.06, and 12.04%) found in the comparison methods. Additionally, the fault characteristic amplitude in the envelope order spectrum using EVS (9.78 m/s2) is higher than the amplitudes (6.14 m/s2, 6.18 m/s2, 8.56 m/s2, and 0.95 m/s2) recorded by the comparison methods. These findings confirm the effectiveness and superiority of EVS over other methods in terms of FWP accuracy and fault characteristic enhancement.","PeriodicalId":17252,"journal":{"name":"Journal of The Brazilian Society of Mechanical Sciences and Engineering","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142226975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An improved NSGA-III integrating a good point set for multi-objective optimal design of power inductors 改进的 NSGA-III 集成了用于功率电感器多目标优化设计的良好点集

IF 2.2 4区工程技术

Journal of The Brazilian Society of Mechanical Sciences and Engineering Pub Date : 2024-09-04 DOI: 10.1007/s40430-024-05159-4

Xia Zhang, Hui Chen

引用次数: 0

Using tip injection to reduce blade count in a transonic fan 利用叶尖喷射减少跨音速风扇的叶片数量

IF 2.2 4区工程技术

Journal of The Brazilian Society of Mechanical Sciences and Engineering Pub Date : 2024-09-04 DOI: 10.1007/s40430-024-05122-3

Hossein Khaleghi

引用次数: 0

Investigation of rock porosity using vibroacoustography 利用振动声学研究岩石孔隙度

IF 2.2 4区工程技术

Journal of The Brazilian Society of Mechanical Sciences and Engineering Pub Date : 2024-09-03 DOI: 10.1007/s40430-024-05141-0

João H. Uliana, Guilherme A. Braz, Éverton L. Oliveira, Arthur G. Araújo-Ferreira, Mateus M. Morais, Willian A. Trevizan, Carlos A. Fortulan, Tito J. Bonagamba, Theo Z. Pavan, Antonio A. O. Carneiro

{"title":"Investigation of rock porosity using vibroacoustography","authors":"João H. Uliana, Guilherme A. Braz, Éverton L. Oliveira, Arthur G. Araújo-Ferreira, Mateus M. Morais, Willian A. Trevizan, Carlos A. Fortulan, Tito J. Bonagamba, Theo Z. Pavan, Antonio A. O. Carneiro","doi":"10.1007/s40430-024-05141-0","DOIUrl":"https://doi.org/10.1007/s40430-024-05141-0","url":null,"abstract":"The porosity of materials influences several physical parameters, such as resistance to fractures, thermal conductivity, and fluid flow permeability. The quantification of porosity is important in various fields, ranging from industry to biomedicine. Although various techniques are available to quantify porosity in laboratory environments, its analysis applied in the context of nondestructive tests in industry or biomedical protocols can be challenging. To contribute to the development of alternative methods for measuring the porosity of a material, this paper investigated the feasibility of using vibroacoustography, a low-cost, nondestructive, and noncontact technique, to estimate the porosity of rock samples. The study examined the vibroacoustic response as a function of porosity in synthetic ceramic samples produced using the same material with controlled porosity percentages. Then, the vibroacoustography technique was applied to a realistic case of sandstone rocks with varying porosities. The results showed that the new protocol can be used to estimate the porosity as it demonstrates a relationship between the amplitude of vibroacoustic signals and the porosity of rock samples. These findings could be valuable in exploring and characterizing oil reservoir rocks.","PeriodicalId":17252,"journal":{"name":"Journal of The Brazilian Society of Mechanical Sciences and Engineering","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling of EDM parameter with novel W/O nano-emulsion 新型 W/O 纳米乳液放电加工参数建模

IF 2.2 4区工程技术

Journal of The Brazilian Society of Mechanical Sciences and Engineering Pub Date : 2024-09-02 DOI: 10.1007/s40430-024-05160-x

Nikhil Jain, Jinesh Kumar Jain, Deepak Rajendra Unune

{"title":"Modeling of EDM parameter with novel W/O nano-emulsion","authors":"Nikhil Jain, Jinesh Kumar Jain, Deepak Rajendra Unune","doi":"10.1007/s40430-024-05160-x","DOIUrl":"https://doi.org/10.1007/s40430-024-05160-x","url":null,"abstract":"This study investigates the potential of a novel water-in-oil nano-emulsion (W/O) synthesized from non-edible refined jatropha oil as a dielectric fluid to enhance the electric discharge machining (EDM) process. W/O nano-emulsion was synthesized in two different surfactant concentrations, namely 10% and 15%. Influence of different input parameters, including current, pulse-on time, pulse-off time, and the concentration of the dielectric fluid, was explored on the key output responses, namely the material removal rate (MRR) and surface roughness. After evaluating its dielectric properties and observing a smaller particle size (46.33 nm) with a polydispersity index of 0.103, the 15% surfactant concentration was selected for EDM testing in comparison with conventional EDM oil. A mathematical model was developed using a face-centered cubic design model of the response surface methodology, and the results were subsequently compared with those obtained from an artificial neural network (ANN) model. The quadratic mathematical model for both MRR and surface roughness closely aligned with the experimental data, with current identified as the most influential parameter affecting both MRR and surface roughness. Pulse-off time, on the other hand, exhibited minimal impact on EDM performance. Furthermore, error analysis was conducted to compare the accuracy of the RSM and ANN models, with the ANN model demonstrating the least error. Notably, the machined surface exhibited fewer cracks and pores in the presence of the proposed (W/O) emulsion and displayed improved micro-hardness compared to conventional EDM oil.","PeriodicalId":17252,"journal":{"name":"Journal of The Brazilian Society of Mechanical Sciences and Engineering","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0