Applications in engineering science最新文献

{"title":"Exploring the potential of tesla valve for filtering and sorting microscale active swimmers: A computational study","authors":"Ariel Rogers ,&nbsp;Zhiyao He ,&nbsp;Yong Wang","doi":"10.1016/j.apples.2023.100159","DOIUrl":"https://doi.org/10.1016/j.apples.2023.100159","url":null,"abstract":"<div><p>It is well-known that a Tesla valve allows fluids to flow unidirectionally without moving parts; however, how Tesla valves interact with active matters and the potential applications of Tesla valves in biology remain largely unexplored. Here, we present a computational study on the potential use of Tesla valves for filtering and sorting microscale active swimmers such as bacteria. We investigated the behavior of microscale swimmers passing through the Tesla valve at different linear and angular velocities using numerical simulations and quantified the diodicity of the Tesla valve for active swimmers. Our results demonstrate that the Tesla valve can effectively filter and sort microscale swimmers based on their swimming behavior. The findings of this study suggest that Tesla valves could have potential applications in microscale sorting and chromatography, with significant implications for biomedical and environmental engineering.</p></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"16 ","pages":"Article 100159"},"PeriodicalIF":0.0,"publicationDate":"2023-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50199213","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":"Engineering properties and mechanical behaviour of problematic soil stabilized by bituminous oil shale ash","authors":"Lubna Amayreh ,&nbsp;Mostafa Mohamed ,&nbsp;Monther Abdelhadi ,&nbsp;Therese Sheehan","doi":"10.1016/j.apples.2023.100156","DOIUrl":"https://doi.org/10.1016/j.apples.2023.100156","url":null,"abstract":"<div><p>This paper investigates the viability of stabilizing expansive brown clays in the Northern region of Jordan using a local bituminous oil shale ash from El-Lajjun, Jordan. A comprehensive experimental programme was designed to i. examine the impact of oil shale ash dose by weight on the strength gain. ii. Evaluate oil shale ash stabilized clays' consolidation and volume change behaviour during loading and unloading. Results revealed that adding 20 % bituminous OSA remarkably improved expansive brown clays' engineering properties and mechanical behaviour. An increase of 140 % in the unconfined compressive strength and a reduction of 19.3 % in the permeability coefficient was obtained at 20 % OSA. Also, the Unconfined Compressive Strength tests revealed that the strength of OSA-treated expansive clays is significantly affected by the curing time. Increases of 35.1 % and 65.7 % in the unconfined compressive strength were achieved after 7 days and 21 days of curing, respectively. Furthermore, the addition of OSA showed an effect on compressibility behaviour, reducing settlement. Regarding the consolidation parameters, the inclusion of 20 % OSA reduced the compression index (Cc) and swelling index (Cs) by 42.67 % and 72.6 %, respectively.</p></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"16 ","pages":"Article 100156"},"PeriodicalIF":0.0,"publicationDate":"2023-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666496823000316/pdfft?md5=19cc145da6cf6a18eae50154606eecf4&pid=1-s2.0-S2666496823000316-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92047093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A methodology using a non-increasing sequence applied in the solution of heat transfer problems","authors":"Vinicius Vendas Sarmento ,&nbsp;Maria Laura Martins-Costa ,&nbsp;Rogério Martins Saldanha da Gama","doi":"10.1016/j.apples.2023.100152","DOIUrl":"https://doi.org/10.1016/j.apples.2023.100152","url":null,"abstract":"<div><p>This research aims to propose a numerical methodology that employs a non-increasing sequence to approximate the solution for a large class of ordinary differential equations like the ones described in complex non-linear heat transfer through porous fins. It also aims to compare this proposed methodology with an earlier one using a non-decreasing sequence of elements and to provide an upper-bound estimation for the error. The comparison between the non-increasing and non-decreasing sequences showed excellent agreement when applied to an example of convection and radiation in porous fins.</p></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"16 ","pages":"Article 100152"},"PeriodicalIF":0.0,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50199219","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":"Experimental evaluation of axial compression performance of precast panels from bamboo-reinforced concrete","authors":"Muhtar,&nbsp;Amri Gunasti","doi":"10.1016/j.apples.2023.100155","DOIUrl":"https://doi.org/10.1016/j.apples.2023.100155","url":null,"abstract":"<div><p>This research aimed to determine the performance of bamboo-reinforced concrete precast panels (BRCPP) subjected to axial compressive loads, validated using numerical simulations. Axial compressive load capacity, crack, and failure patterns were investigated and compared with steel-reinforced concrete precast panels (SRCPP) as a control. Eight panels were made with details of four BRCPP and SRCPP, having dimensions of 1200 × 400 × 50 mm³ each. The four SRCPPs consisted of two panels, produced in laboratories and two manufactured by local companies. The variations in bamboo reinforcement spacing were 150 mm and 180 mm, while the gap between steels was 180 mm, and panels were tested under axial compressive load. The results showed that the axial compressive load capacity of BRCPP with a bamboo reinforcement size of 12 × 12 mm² at a distance of 150 mm was sufficient to meet the specifications of SRCPP panels produced by the local industry. Based on experimental, theoretical, and numerical simulation analysis, the performance of BRCPP showed suitability, making it a considerable choice, specifically for precast panels. The special advantage of BRCPP encompassed eco-friendliness and sustainability.</p></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"16 ","pages":"Article 100155"},"PeriodicalIF":0.0,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50199218","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":"Review on the mechanism and mitigation of cracks in concrete","authors":"Asvitha Valli S ,&nbsp;Ravi Kumar M S","doi":"10.1016/j.apples.2023.100154","DOIUrl":"https://doi.org/10.1016/j.apples.2023.100154","url":null,"abstract":"<div><p>Cracks and cavities belong to two basic forms of damage to the concrete structure, which may reduce the load-bearing capacity and tightness of the structure and lead to failures and catastrophes in construction structures. One of the most prevalent faults in concrete constructions is cracking, which, if left unchecked, can greatly diminish the longevity of the building. For the past few years, scientists have worked to understand the complex mechanics behind concrete cracking. It has been found that the primary initiators of plastic cracking include surface finishing, capillary action, bleeding, evaporation, and settlement of solid particles. A number of techniques and measurements have been developed to measure the influence of the various processes that result in concrete shrinkage and cracking. Cracking due to shrinkage and plastic segregation are now also referred to as plastic cracking. Numerous cracking prevention techniques have been suggested, such as fogging, using fewer particles, and using fibres. This cutting-edge study updates the significant growth of research on the subject to what is currently considered cutting-edge and state-of-the-art.</p></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"16 ","pages":"Article 100154"},"PeriodicalIF":0.0,"publicationDate":"2023-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666496823000298/pdfft?md5=745832be45931d78b033990c00a785e9&pid=1-s2.0-S2666496823000298-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92047090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Res-Net-VGG19: Improved tumor segmentation using MR images based on Res-Net architecture and efficient VGG gliomas grading","authors":"Amine Ben Slama ,&nbsp;Hanene Sahli ,&nbsp;Yessine Amri ,&nbsp;Hedi Trabelsi","doi":"10.1016/j.apples.2023.100153","DOIUrl":"https://doi.org/10.1016/j.apples.2023.100153","url":null,"abstract":"<div><h3>Background</h3><p>The determination of area tumor presents the chief challenge in brain tumor therapy and assessment. Without ionizing radiation, the medical Magnetic Resonance Imaging (MRI) tool has appeared as an essential diagnostic technique for brain cancers. Using 2D MRI images, manual segmentation of brain tumor size is a slow, error-prone task which the performance is extremely depends on operator's experience. In that respect, a consistent totally automated segmentation approach for the brain tumor detection is effectively needed to get a proficient dimension of the tumor size.</p></div><div><h3>Results</h3><p>In this paper, an effusively computerized scheme for brain tumor detection is proposed by the use of deep convolutional networks. The proposed method was appraised on Brain Tumor Image Segmentation (BRATS 2020) datasets, including 1352 affected by brain tumor.</p></div><div><h3>Conclusion</h3><p>Cross-validation technique has revealed that our process can attain talented segmentation competently reaching higher accuracy compared to other previous studies.</p></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"16 ","pages":"Article 100153"},"PeriodicalIF":0.0,"publicationDate":"2023-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50199217","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":"Shear capacity evaluation of studs in steel-high strength concrete composite structures","authors":"Chen Guang","doi":"10.1016/j.apples.2023.100150","DOIUrl":"10.1016/j.apples.2023.100150","url":null,"abstract":"<div><p>The shear capacity of stud shear connectors was the main parameter affecting the mechanical performance of steel-concrete composite structures. In this paper, three artificial neural networks (ANN) were developed to evaluate the shear capacity of stud shear connectors in steel-high strength concrete composite structures. The models was applied to high strength concrete, covering the compressive strength of concrete in 61.19 MPa∼200 MPa. Based on the correlation analysis, the main influential parameters, including the compressive strength of concrete, the diameter, height, yield strength, number, and pretension force of stud shear connectors, were selected as input variables to the models. The proposed models were trained and tested with 100-group test data gathered from previous studies. By comparing with existing empirical models, it was proved that the proposed Elman network and RBF network had high applicability and reliability for predicting the shear capacity of stud shear connectors in steel-high strength concrete composite structures. Subsequently the parametric sensitive analysis was carried out based on the BP network.</p></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"17 ","pages":"Article 100150"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666496823000250/pdfft?md5=f72859e48e6338fd5f4556f03a16e659&pid=1-s2.0-S2666496823000250-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134918284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A general approach to the mechanical analysis of continuous local inhomogeneity using continuum mechanics theory and a new general energy-based-model","authors":"Saeed Shahsavari,&nbsp;S.M.A. Boutorabi","doi":"10.1016/j.apples.2023.100149","DOIUrl":"https://doi.org/10.1016/j.apples.2023.100149","url":null,"abstract":"<div><p>While usually we don't know complete geometrical and physical information on the occurred inhomogeneity, but in order to study the related phenomena, continuum mechanics theory as well as exiting energy-based models need direct information from the desired system in order to A General Approach to the Mechanical Analysis of Continuous Local Inhomogeneity Using Continuum Mechanics Theory and A New General Energy-Based- Modelapply the field equations. Of course, theories and ideas based on the unification of mechanics and thermodynamics can offer other solutions. This paper establishes a general energy based model to study effects of local inhomogeneity on the mechanical behavior of materials using thermodynamic laws with a new deviation as well as new approach to the total energy. In fact, the main goal is that the established model can be used with a wide range of applications and appropriate accuracy, both theoretically and experimentally, while not getting involved with excessive computational complexity. It can be noted that the extracted formulations develop possibility to study inhomogeneity effects on the mechanical behavior without any more limiting conditions. In addition, due to that study of the stored and dissipated energy, usually, has the main role in the investigating of the inhomogeneity effects on the mechanical behavior, also the point of view in the presented model is in complete agreement to provide the conditions for this study directly. Therefore, the prediction possibility of the inhomogeneity effects on the mechanical behavior will be provided with the smallest volume of needed calculations. Also, due to that the structure and properties of the inhomogeneity are unknown usually, the formulations aren't dependent to these knowledge directly, and can be analyzed theoretically and experimentally to study the homogeneity part, as a known material. In the following, feasible processes are studied using extracted formulations. To validate the equations, a rectangular material shape with local inhomogeneity is considered, and extracted equations are developed for that. To consider our mean on the stored and dissipated energies, it is assumed that the homogeneity part of material has viscoelastic behavior, and the equations are developed to Maxwell and Kelvin viscoelastic models in different homogeneity parts of the body. In the following, classical continuum mechanic theory due to elasticity theory is used, and the field equations are developed to the considered body. Finally, results are discussed, compared as well as their differences, and corresponding capabilities for functional completion are discussed. Finally, the fundamental equivalence of the results is studied, and matching of the results between continuum mechanics theory and extracted formulations is shown.</p></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"16 ","pages":"Article 100149"},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50199214","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":"A new viscoelastic model for human brain tissue using Lode invariants based rate-type thermodynamic framework","authors":"Durga Prasad,&nbsp;P. Sreejith,&nbsp;K. Kannan","doi":"10.1016/j.apples.2023.100130","DOIUrl":"10.1016/j.apples.2023.100130","url":null,"abstract":"<div><p>We develop new rate-type constitutive relations on a set of orthonormal tensor basis and the corresponding set of Lode invariants, which require only 9 material parameters to predict the mechanical response of the human brain tissue. The mode-dependent response of the tissue is captured by invoking the Hill-stable elastic potential of Prasad and Kannan (2020) and constructing a new form for the rate of dissipation, thus introducing the mode-of-deformation dependent modulus terms and the mode-of-deformation-rate dependent viscosities into the rate-type thermodynamic framework of Rajagopal and Srinivasa (2000). Through the analysis-driven construction of the rate of dissipation, we incorporate maximum change in the viscosities with respect to the mode-of-deformation rates and limit the number of material parameters. Our model satisfactorily predicts the complicated load-unload cycles (pre-conditioned and conditioned) and the stress relaxation data under multiple modes of deformation and multiple rates for the Corona Radiata (CR) region of the brain tissue. It also captures the tension–compression asymmetry in the response and the higher relaxation time in compression loading than in shear loading.</p></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"15 ","pages":"Article 100130"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45597150","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":"Simplified transformation matrices of journal bearings in vertical application","authors":"Gudeta Berhanu Benti ,&nbsp;Jan-Olov Aidanpää ,&nbsp;Rolf Gustavsson","doi":"10.1016/j.apples.2023.100147","DOIUrl":"10.1016/j.apples.2023.100147","url":null,"abstract":"<div><p>Rotodynamic simulation of complex or/and large systems, for instance hydropower machines, may consist of models with many degrees of freedom and require multidisciplinary computations such as fluid-thermal-structure interactions or rotor-stator interactions due to electromagnetic forces. Simulating such systems is often computationally heavy and impractical, especially in the case of optimization or parametric study, where many iterations are required. This has, therefore, created a need for simplified dynamic models to improve computational efficiency without significantly affecting the accuracy of the simulation result. The purpose of this paper is to present simplified coordinate transformation matrices for journal bearings in vertical rotors, which require less computational effort. Matrix multiplications, which appear during coordinate transformation, were eliminated, and the bearing stiffness and damping matrices in the fixed reference frame were represented by local coefficients instead. The dynamic response of a vertical rotor with eight-shoe Tilting pad journal bearings was simulated using the proposed model for two operational conditions, i.e., when the rotor was spinning at constant and variable speeds. The results from the proposed model were compared to those from the original model and validated through experiments. The conclusion was that the presented simulation model is time efficient and can effectively be used in rotordynamic simulations and analyses.</p></div>","PeriodicalId":72251,"journal":{"name":"Applications in engineering science","volume":"15 ","pages":"Article 100147"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45204417","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}