Meccanica最新文献

{"title":"Preface of: new approaches in bio-computational-material mechanics","authors":"Sonia Marfia, Giovanni Noselli, Vincenzo Parenti Castelli, Aurora Angela Pisano","doi":"10.1007/s11012-024-01866-3","DOIUrl":"10.1007/s11012-024-01866-3","url":null,"abstract":"","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"59 8","pages":"1229 - 1230"},"PeriodicalIF":1.9,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamic analysis of a cable model subjected to both vortex-induced excitation and axial support motion","authors":"Yunyue Cong,&nbsp;Houjun Kang,&nbsp;Tieding Guo,&nbsp;Xiaoyang Su","doi":"10.1007/s11012-024-01861-8","DOIUrl":"10.1007/s11012-024-01861-8","url":null,"abstract":"<div><p>Large amplitude vibration of transmission line seriously affects the structural safety. Due to the low bending stiffness of superhigh transmission tower, vortex-induced excitation combining with support motion induced by the tower will cause significant complex dynamic behaviors of the transmission line. To reveal dynamic behaviors, this paper newly proposes a suspended cable model of the transmission line subjected to the boundary motion and vortex-induced vibration. Dynamic mechanism and vibration energy transfer are focused in the condition of primary and subharmonic resonances. Innovative behaviors of the transmission line under two excitations are revealed. Firstly, vortex-induced excitation is very weak and support motion usually plays a dominate role in the dynamic responses. Large amplitude vibration of transmission line observed in practice should be caused more by tower tip motion and the vortex-induced vibration is the incentive. Secondly, different weak support motion can cause different effect on dynamic responses of transmission line under vortex-induced vibration reflecting by different lock-in phenomenon, which leads us the application of active control measure in engineering.</p></div>","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"59 11","pages":"1829 - 1845"},"PeriodicalIF":1.9,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141942519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of nonhomogeneity on compression of solid circular cylinders made of functionally graded incompressible neo-Hookean materials","authors":"Fatsah Mendil,&nbsp;Hocine Bechir,&nbsp;Mounir Methia","doi":"10.1007/s11012-024-01852-9","DOIUrl":"10.1007/s11012-024-01852-9","url":null,"abstract":"<div><p>We investigate the influence of elastic nonhomogeneity on compression of solid circular cylinders made of incompressible functionally graded neo-Hookean materials. The shear modulus is assumed varying in the axial direction. The fixed–fixed conditions are considered, i.e. two rigid platens are fixed to ends of sample surfaces. We transform the balance equations into ordinary differential equations (ODE) which are solved numerically. Based on, we investigate lateral deformed profiles of a solid circular cylinder. Furthermore, we compute von-Mises stress that governs the possible failure of the material.</p></div>","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"59 9","pages":"1625 - 1638"},"PeriodicalIF":1.9,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141926542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A variational model for finger-driven cell diffusion in the extracellular matrix","authors":"Antonino Favata,&nbsp;Andrea Rodella,&nbsp;Stefano Vidoli","doi":"10.1007/s11012-024-01835-w","DOIUrl":"10.1007/s11012-024-01835-w","url":null,"abstract":"<div><p>We present a simple chemo-mechanical variational model for a fibrous material that describes (i) the emergence of the anisotropy due to microscopic buckling instabilities (ii) a diffusion in the substrate of the cell phase driven by the new created macroscopic bands characterized by intense compressive deformation. The model is applicable for simulating the spreading of cells within tissues and their interaction with tissue remodeling during mesenchymal migration.</p></div>","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"59 8","pages":"1315 - 1326"},"PeriodicalIF":1.9,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11012-024-01835-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141942520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surface wave generation from a constant-slope-inducing asymmetric ocean floor motion: influence of compressible ocean","authors":"Ritika Das,&nbsp;Santu Das","doi":"10.1007/s11012-024-01863-6","DOIUrl":"10.1007/s11012-024-01863-6","url":null,"abstract":"<div><p>Ocean surface wave profile due to the movement of an asymmetric (sloping) block of the ocean floor is analytically derived under the assumption of linearized water wave theory and by using the Fourier transformation method. A slight compressibility of the ocean water allows for generating acoustic-gravity modes that travel much faster than tsunami waves, the detection of which can contribute towards a possible warning mechanism. The influence of different parameters of interest, namely ocean depth, length, and slope of the block, on the surface wave profile is shown in the frequency domain. Finally, the frequency-domain solution is utilized to provide the surface profile in the time domain. The stationary phase approximation is applied to extract the far-field behavior of the surface waves. The individual impact of the acoustic-gravity and pure gravity modes is shown. Due to the asymmetry of the bottom motion, two different types of far-fields in opposite directions of each other from the source of initial ocean floor motion are obtained. The classical solutions of horizontal and flat moving ocean floors studied by Yamamoto (DOI:https://doi.org/10.1016/0261-7277(82)90016-X) in the frequency domain and Stiassnie (DOI: https://doi.org/10.1007/s10665-009-9323-x) in the time-domain are recovered as special cases. The envelope amplitude of the far-field surface fluctuates less when slope exists. The contributions from the acoustic-gravity modes in the far-field surface amplitude in the opposite directions are in opposite phases. The pure-gravity mode contribution is higher towards the direction of increasing slope with more oscillation. These results show insight into the surface profile when a submarine earthquake moves the ocean floor asymmetrically, and they could lead to a possible estimation of the fault geometry. These results can also be utilized to approximate arbitrary bottom movement using superposition of piece-wise asymmetric moving ocean floor arranged in a line and may provide important information for early tsunami detection mechanisms in the future.</p></div>","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"59 9","pages":"1607 - 1623"},"PeriodicalIF":1.9,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141942521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sensitivity to entrance conditions of wall shear stress in a curved vessel","authors":"Yuling Chen, Xavier Escriva, Thomas Castelain, Patrick Feugier, Bruno Gilles, Jean-Christophe Béra","doi":"10.1007/s11012-024-01844-9","DOIUrl":"https://doi.org/10.1007/s11012-024-01844-9","url":null,"abstract":"<p>This study aims to numerically investigate the impact of entrance velocity distributions on wall shear stress in a simplified curved vessel model. The flow in a single-curved vessel is simulated with Reynolds numbers adjusted to a Newtonian blood-analog fluid in an external iliac artery (EIA) model. Simulations are conducted assuming a rigid wall and a steady-state flow regime using OpenFOAM®. Eight entry velocity conditions are implemented, including the effects of flow development, asymmetry, Dean-type secondary flow and rotation. Their influences on hemodynamics features are investigated, focusing on axial wall shear stress (WSS). In the examined configurations of EIA flow, the impact of entrance conditions on WSS distribution is moderate. The maximum WSS is consistently located at the bend exit on the outer wall, except in the case mimicking an upstream curved pipe in the opposite direction of the local curvature. While the entry condition affects the maximum WSS value, this value remains within the same order of magnitude. At <span>(Re=560)</span>, the highest WSS value is given by the <i>Poiseuille</i> condition and reaches 4.9 times the value of the laminar straight flow. At <span>(Re=1100)</span>, the maximum value provided by the Dean-type condition, particularly in the case mimicking an upstream curved pipe perpendicular to the local curvature, reaching 7.1 times the laminar straight flow, which exceeds the value of the <i>Poiseuille</i> condition by 17%. The results suggest that, to capture extreme WSS value, opting for <i>Poiseuille</i> flow as the entrance condition is a good choice for further studies on EIA flow. It has to be noted that results presented here tend to confirm the link established between exaggerated WSS and the endofibrosic plaque development.</p>","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"22 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141942522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Belief reliability of structures with hybrid uncertainties","authors":"Sushma H. Metagudda,&nbsp;A. S. Balu","doi":"10.1007/s11012-024-01832-z","DOIUrl":"10.1007/s11012-024-01832-z","url":null,"abstract":"<div><p>Reliability of structures is evaluated by considering uncertainties present in the system, which can be characterized into aleatory and epistemic. Inherent randomness in the physical environment leads to aleatory, whereas insufficient knowledge about the system leads to epistemic uncertainty. For the reliability evaluation, ascertaining the sources of uncertainties poses a great challenge since both uncertainties coexist widely in structural systems. Aleatory uncertainties are quantified by probabilistic measures (such as first order reliability method, second order reliability method and Monte Carlo techniques), whereas epistemic uncertainties are quantified by various non-probabilistic approaches (such as interval analysis methods, evidence theory, possibility theory and fuzzy theory). However, major issues like interval extension problem and duality conditions that lead to overestimation hinder the versatility of application of such methods, thus <i>uncertainty theory</i> has been emerged to overcome these limitations. Given the existing uncertainties and limitations, a hybrid strategy has been constructed and referred to as “<i>belief reliability</i>”. A belief reliability metric is integration of three key factors: design margin, aleatory and epistemic uncertainty factor to evaluate the reliability of the structural system. In this paper, Monte Carlo simulation is adopted to account for aleatory uncertainty. On the other hand, epistemic uncertainty is quantified through adjustment factor approach using FMEA (failure mode effective analysis). Numerical examples are presented to substantiate the proposed methodology being applied to variety of problems both implicit and explicit nature in structural engineering.</p></div>","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"59 9","pages":"1593 - 1606"},"PeriodicalIF":1.9,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141882401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A thermodynamical suspension model for blood","authors":"Matteo Gorgone,&nbsp;Carmelo Filippo Munafò,&nbsp;Annunziata Palumbo,&nbsp;Patrizia Rogolino","doi":"10.1007/s11012-024-01859-2","DOIUrl":"10.1007/s11012-024-01859-2","url":null,"abstract":"<div><p>A complete thermodynamical analysis for a blood model, based on mixture theory, is performed. The model is developed considering the blood as a suspension of red blood cells (solid component) in the plasma (fluid component), and taking into account the temperature effects. Furthermore, two independent scalar internal variables are introduced accounting for additional dissipative effects. Using Clausius-Duhem inequality, the general thermodynamic restrictions and residual dissipation inequality are derived. The thermodynamic admissibility with the second law of thermodynamics is assessed by means of the extended Coleman-Noll procedure; in one space dimension we exhibit a solution of all the thermodynamical constraints.</p></div>","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"59 10","pages":"1671 - 1683"},"PeriodicalIF":1.9,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141882398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A method to enhance the nonlinear magnetic plucking for vibration energy harvesters","authors":"Michele Rosso,&nbsp;Simone Cuccurullo,&nbsp;Filippo Pietro Perli,&nbsp;Federico Maspero,&nbsp;Alberto Corigliano,&nbsp;Raffaele Ardito","doi":"10.1007/s11012-024-01856-5","DOIUrl":"10.1007/s11012-024-01856-5","url":null,"abstract":"<div><p>In this work, a technique to improve the magnetic plucking for frequency up-conversion in piezoelectric energy harvesters is presented. The technique involves shielded magnets with Neodymium-iron-boron alloy polarized in the opposite direction on a main magnet. The phenomenon is investigated both at the computational and at the experimental level. Subsequently, simulations on a mesoscale piezoelectric energy harvester are presented which demonstrate a gain of 17 times if the magnets are shielded in comparison with the classical plucking (i.e. without shielding). The technique finds useful applications and benefits in the field of low-speed and low-frequency vibration energy harvesting, as well as in actuation and sensing.</p></div>","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"59 9","pages":"1577 - 1592"},"PeriodicalIF":1.9,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11012-024-01856-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141882400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A new combined fabrication process to shape small flexure hinges","authors":"Marco Fava,&nbsp;Vincenzo Parenti-Castelli,&nbsp;Michele Conconi,&nbsp;Nicola Sancisi","doi":"10.1007/s11012-024-01860-9","DOIUrl":"10.1007/s11012-024-01860-9","url":null,"abstract":"<div><p>This paper presents a new combined fabrication method, named 3D-PLAST, aimed at overcoming inherent limitations of conventional additive manufacturing techniques when producing small flexure hinges in compliant mechanisms. Flexure hinges play a crucial role in various applications, offering advantages such as cost reduction, increased precision, and weight reduction. However, traditional additive manufacturing proves challenging in achieving satisfactory mechanical properties when manufacturing small-size hinges. To overcome these limitations, the 3D-PLAST process combines fused filament fabrication with compressive plastic deformation. This hybrid process exploits the advantages of both techniques, i.e., flexibility, low cost, and ease of use. This process enables the fabrication of small-size mechanisms with good dimensional accuracy. Finally, the paper reports experimental tests on two materials comparing flexure hinges manufactured by 3D-PLAST versus 3D printing methods to demonstrate the effectiveness of the proposed process.</p></div>","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"59 8","pages":"1327 - 1334"},"PeriodicalIF":1.9,"publicationDate":"2024-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11012-024-01860-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}