Meccanica最新文献_第6页

Design and performance investigation of a sliding-mode adaptive proportional–integral–derivative control for cable-breakage scenario 针对电缆断裂情况的滑动模式自适应比例-积分-派生控制的设计与性能研究

IF 1.9 3区工程技术

Meccanica Pub Date : 2024-09-09 DOI: 10.1007/s11012-024-01875-2

Vincenzo Di Paola, Stéphane Caro, Matteo Zoppi

引用次数: 0

Theoretical calculation methods of stable bearing capacity for thin-walled shells with corrosion and variable temperature 腐蚀和变温薄壁壳体稳定承载力的理论计算方法

IF 2.7 3区工程技术

Meccanica Pub Date : 2024-09-02 DOI: 10.1007/s11012-024-01811-4

Cheng Huijuan Liu, Giuseppe Lacidogna

{"title":"Theoretical calculation methods of stable bearing capacity for thin-walled shells with corrosion and variable temperature","authors":"Cheng Huijuan Liu, Giuseppe Lacidogna","doi":"10.1007/s11012-024-01811-4","DOIUrl":"https://doi.org/10.1007/s11012-024-01811-4","url":null,"abstract":"<p>Thin-wall shells (steel plates, steel cylindrical shells, steel spherical shells, etc.) are widely used in many engineering fields such as construction, machinery, chemical industry, navigation, and aviation because of their light weight and high strength. Their failure modes under static pressure or impact dynamic load are mostly buckling instability, and the failure is very sudden, often causing structural failure or even catastrophic accidents without obvious symptoms. In this framework, the significance of this paper is that it considers the influence of external environment corrosion on steel shells' bearing capacity using plate and shell classical stability theory, and investigates the stable bearing capacity of thin-wall steel shells in view of corrosion impact. By this approach, a theoretical calculating method for the time-varying stable bearing capacity of plate and shell thin-walled steel members under the simultaneous action of corrosion and temperature changes is obtained, providing a useful theory for complex engineering practices such as corrosion and temperature changes, including fire actions. Noted that for this method with no analytical solution found, its numerical solutions are given in the appendixes.</p>","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"8 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189159","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}

引用次数: 0

Network-based and sheet-based Gyroid lattice structures with different gradient directions: manufacture, mechanical response and energy absorption 具有不同梯度方向的网状和片状 Gyroid 晶格结构：制造、机械响应和能量吸收

IF 1.9 3区工程技术

Meccanica Pub Date : 2024-08-31 DOI: 10.1007/s11012-024-01874-3

Bo Hao, Zhiming Zhu, Li Zhang

{"title":"Network-based and sheet-based Gyroid lattice structures with different gradient directions: manufacture, mechanical response and energy absorption","authors":"Bo Hao, Zhiming Zhu, Li Zhang","doi":"10.1007/s11012-024-01874-3","DOIUrl":"10.1007/s11012-024-01874-3","url":null,"abstract":"<div><p>To investigate the effect of gradient direction on mechanical properties and energy absorption capability of Gyroid lattice structures (GLSs), network-based and sheet-based lattice structures (G1-N768, G2-N768, G1-S768, G2-S768) of different gradient directions with an average porosity of 70% were established. The Al-Si10-Mg samples were manufactured through selective laser melting (SLM). Through compression tests and finite element analysis (FEA), the energy absorption, deformation behavior, and mechanical properties of the GLSs were evaluated. The data exhibited good consistency, and the deviations of yield strength, elastic modulus, plateau stress, densification strain and energy absorption could be controlled at about 10%. The results indicated that whether it is network-based or sheet-based GLSs, by changing the gradient direction, the deformation behavior could be transformed from layer-by-layer deformation (G1-GLSs) to uniform deformation (G2-GLSs), and thus realize the regulation of mechanical properties. At the same time, due to different topological configurations, stretch-dominated sheet-based GLSs (G1-S768, G2-S768) exhibited higher energy absorption capability and mechanical properties than bending-dominated network-based GLSs (G1-N768, G2-N768), and the energy absorption, yield strength and elastic modulus increased by 93.7%, 80.8% and 66.7%, respectively. In addition, the introduction of the Johnson–Cook model has effectively simulated the failure behavior of GLSs. This paper can offer theoretical guidance for the subsequent performance regulation and application of functionally graded GLSs.</p></div>","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"59 11","pages":"1911 - 1926"},"PeriodicalIF":1.9,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189157","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}

引用次数: 0

Eccentric contraction response of stimulated skeletal muscle fascicle at the various strain rates and stimulation timing 不同应变率和刺激时间下受刺激骨骼肌筋膜的偏心收缩反应

IF 1.9 3区工程技术

Meccanica Pub Date : 2024-08-30 DOI: 10.1007/s11012-024-01872-5

Dat Trong Tran, Liren Tsai

{"title":"Eccentric contraction response of stimulated skeletal muscle fascicle at the various strain rates and stimulation timing","authors":"Dat Trong Tran, Liren Tsai","doi":"10.1007/s11012-024-01872-5","DOIUrl":"10.1007/s11012-024-01872-5","url":null,"abstract":"<div><p>Muscle injuries are the most common sports injuries in eccentric contraction. There are many factors that could influence the severity of muscle injuries, including strain, strain rate and stimulation. This study evaluated the interaction of these factors on the biomechanical properties of the muscle–tendon bundle and their role in injuries. A Hopkinson bar system, an MTS machine and an electrical pulse generator were utilized to collect eccentric contraction response data of over 150 frog muscle–tendon samples at strain rates ranging from 0.01 to 300 s<sup>−1</sup>. The results have shown that the maximum eccentric stress has increased and peaked at the strain rate of about 150 s<sup>−1</sup>. That peak value has then maintained at the following strain rates. In contrast, Young’s modulus reduced as the strain rate changed from 50 to 300 s<sup>−1</sup>. That trend was in contrast to unstimulated muscle bundles. In addition, strain rate has significantly influenced stimulated tendon–muscle bundle fracture. Samples tend to rupture at a minor strain of about 3.5% with strain rates over 200 s<sup>−1</sup>. Because of the increasing stiffness of the muscle area at high strain rates, increased strain in the tendon region resulted in frequent injuries in the tendon area. On the other hand, a maximum stress reduction was detected when the muscle bundles were stimulated at muscle strain greater than 0.2. The results showed that improper timing of stimulation could increase muscle injury. The study shows that the stimulation and strain rate dramatically impact muscle–tendon properties and the risk of injury.</p></div>","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"59 11","pages":"1897 - 1910"},"PeriodicalIF":1.9,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189160","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}

引用次数: 0

A continuum model for in-plane analysis of masonry: an approach based on failure mode classification 砌体平面分析连续体模型：基于失效模式分类的方法

IF 2.7 3区工程技术

Meccanica Pub Date : 2024-08-30 DOI: 10.1007/s11012-024-01864-5

G. Bertani, L. Patruno, A. M. D’Altri, G. Castellazzi, M. Cervera, S. de Miranda

{"title":"A continuum model for in-plane analysis of masonry: an approach based on failure mode classification","authors":"G. Bertani, L. Patruno, A. M. D’Altri, G. Castellazzi, M. Cervera, S. de Miranda","doi":"10.1007/s11012-024-01864-5","DOIUrl":"https://doi.org/10.1007/s11012-024-01864-5","url":null,"abstract":"<p>In this paper, a multi-failure continuum model for in-plane analysis of masonry structures is introduced. The model is based on a recently-proposed single-surface multi-failure strength domain, and is here implemented in an elasto-plastic framework to perform nonlinear incremental static analyses on masonry walls. As a key feature of the model, the activated failure mechanism(s) can be identified and the corresponding plastic strains evolution computed. In particular, the distinction between crushing failure, joint failure (horizontal, vertical, and diagonal) and mixed joint-block failure is guaranteed by means of specific weights assigned to each failure mode. This amounts to a classification procedure which selects the active failure modes based on the information provided by the stress state. As a further novelty of this work, ad hoc nonassociated flow rules are then chosen to characterize each failure mode independently, so allowing a straightforward tracking of their nonlinear evolution. Well-known numerical examples are used to show the capability of the approach. From these, the proposed continuum model appears accurate and the tracking of the plastic strains related to the considered failure modes allows a straightforward interpretation of the results.</p>","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"10 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189158","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}

引用次数: 0

Navigating speed–accuracy trade-offs for multi-physics simulations 多物理场仿真的速度-精度权衡导航

IF 2.7 3区工程技术

Meccanica Pub Date : 2024-08-25 DOI: 10.1007/s11012-024-01867-2

Zohreh Moradinia, Hans Vandierendonck, Adrian Murphy

{"title":"Navigating speed–accuracy trade-offs for multi-physics simulations","authors":"Zohreh Moradinia, Hans Vandierendonck, Adrian Murphy","doi":"10.1007/s11012-024-01867-2","DOIUrl":"https://doi.org/10.1007/s11012-024-01867-2","url":null,"abstract":"<p>This paper introduces a novel approach aimed at addressing persistent challenges inherent in conventional multiphysics modeling methodologies. Existing techniques, such as numerical modeling and analytical calculations, often suffer from time-consuming and computationally intensive processes, leading to inefficiencies, particularly in intricate simulations. The proposed methodology employs regression machine learning algorithms as a black-box solution to anticipate errors and execution times in multiphysics simulations. Diverging from conventional methods, this approach streamlines the exploration of simulation options, providing discernible choices for balancing speed and precision. The efficacy of the methodology is exemplified through successful applications to heat transfer and fluid–structure interaction problems, illustrating its adaptability across diverse scenarios. Notably, the approach upholds the integrity of physics equations and simulation convergence while markedly reducing the trial-and-error efforts and computational burdens associated with traditional methodologies. In summary, the proposed approach emerges as an innovative and promising solution to augment the accuracy, efficiency, and dependability of multiphysics simulations.</p>","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"6 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189161","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}

引用次数: 0

Investigation of double-volute balancing in centrifugal pumps 离心泵双涡流平衡研究

IF 1.9 3区工程技术

Meccanica Pub Date : 2024-08-23 DOI: 10.1007/s11012-024-01870-7

Ali Kibar, Kadri Suleyman Yigit

{"title":"Investigation of double-volute balancing in centrifugal pumps","authors":"Ali Kibar, Kadri Suleyman Yigit","doi":"10.1007/s11012-024-01870-7","DOIUrl":"10.1007/s11012-024-01870-7","url":null,"abstract":"<div><p>This study investigates the effect of radial hydraulic forces on low-specific-speed centrifugal pump bearings and assesses the effectiveness of the double-volute balancing technique in mitigating these forces. Numerical simulations were conducted on centrifugal pumps with both single- and double-volute designs. Experimental validation confirmed the numerical findings, establishing the technique's efficacy. Additionally, while size limitations often restrict the use of double-volutes in small pumps, their potential benefits and encouragement for further exploration are discussed for these applications, highlighting the significance of the double-volute arrangement in designing and operating high-pressure radial-flow centrifugal pumps. The simulations demonstrated a notable decrease in the radial hydraulic forces with the implementation of the double-volute configuration. Consequently, adopting a double-volute centrifugal pump design resulted in a substantial reduction in the impeller-induced forces and forces exerted on the bearings, leading to an approximate 45% decrease in the hydraulic radial forces. This result explains the significant reduction in impeller-induced and bearing forces.</p></div>","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"59 11","pages":"1859 - 1875"},"PeriodicalIF":1.9,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189191","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}

引用次数: 0

Exact free vibration analysis of generalized multi-step Timoshenko beams coupled with spring-supported rigid bodies 与弹簧支撑刚体耦合的广义多阶季莫申科梁的精确自由振动分析

IF 1.9 3区工程技术

Meccanica Pub Date : 2024-08-23 DOI: 10.1007/s11012-024-01871-6

Zhengquan Liu, Guoping Wang, Xiaoting Rui, Jianshu Zhang, Lilin Gu

{"title":"Exact free vibration analysis of generalized multi-step Timoshenko beams coupled with spring-supported rigid bodies","authors":"Zhengquan Liu, Guoping Wang, Xiaoting Rui, Jianshu Zhang, Lilin Gu","doi":"10.1007/s11012-024-01871-6","DOIUrl":"10.1007/s11012-024-01871-6","url":null,"abstract":"<div><p>This paper presents a linear version of the reduced multibody system transfer matrix method, specifically designed for the exact analysis of free vibrations in hybrid models composed of Timoshenko beams, rigid bodies, and springs. The method is flexible, designed to handle various boundary conditions and any combination of beams, rigid bodies, and springs. We treat each beam segment and spring-supported rigid body as independent elements. Thus, viewing the overall model as a chain system simplifies the analysis. The essence of this method is the recursive transfer of mechanical information between elements, which is contained in the reduced transfer equations. The reduced transfer equations for the spring-supported rigid bodies and Timoshenko beams are derived in detail. The accuracy, high precision, and higher-order modal analysis capabilities of this method are validated through numerical examples. Furthermore, the improvement of the numerical stability by the segmentation strategy is analyzed, and the orthogonality between the augmented eigenvectors is proved mathematically and numerically. The concise, structured and highly programmable greatly simplifies the process of handling complex hybrid systems containing any number of Timoshenko beams and rigid bodies.</p></div>","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"59 11","pages":"1877 - 1896"},"PeriodicalIF":1.9,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189162","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}

引用次数: 0

Phase field modeling of crack propagation in structures under tensile stress 拉应力下结构裂纹扩展的相场建模

IF 2.7 3区工程技术

Meccanica Pub Date : 2024-08-20 DOI: 10.1007/s11012-024-01869-0

Chaima Mastouri, Ahmed Frikha, Radhi Abdelmoula

{"title":"Phase field modeling of crack propagation in structures under tensile stress","authors":"Chaima Mastouri, Ahmed Frikha, Radhi Abdelmoula","doi":"10.1007/s11012-024-01869-0","DOIUrl":"https://doi.org/10.1007/s11012-024-01869-0","url":null,"abstract":"<p>This paper presents a numerical implementation of phase field models in structures subjected to tensile stress in both quasi-static and dynamic fracture cases. It focuses on the AT1 model and the phase field regularized cohesive zone model (PF-CZM) to compare their performance. Within these models, we focus on implementing the irreversibility condition using the penalization method rather than (Miehe et al. in Comput Methods Appl Mech Eng 199(45–48):2765–2778, 2010. https://doi.org/10.1016/j.cma.2010.04.011)’s “History field” method. Moreover, we employed a staggered algorithmic implementation due to its proven robustness. Numerical simulations were conducted using the multi-physic finite element code, COMSOL Multiphysics. The geometries analyzed include a notched and un-notched confined beam under stretching load and a ring under internal pressure. The originality of this work is presented in two parts. The first part consists in the implementation of the penalization technique within COMSOL Multiphysics. Then we investigated the effects of parameters like cohesive softening laws, notch depth and shape, mesh sensitivity, and length scale sensitivity on the confined beam responses. The second part of this manuscript consists in studying the dynamic fragmentation of a ring under internal pressure. A new solution is proposed to capture crack nucleation and propagation without randomizing material parameters.</p>","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"7 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189192","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}

引用次数: 0

Assessment of the material properties effect on the response of Morrow’s Model for estimating the dissipation of energy in fatigue of metals 评估材料特性对用于估算金属疲劳能量耗散的莫罗模型响应的影响

IF 1.9 3区工程技术

Meccanica Pub Date : 2024-08-16 DOI: 10.1007/s11012-024-01868-1

Víctor I. Rodríguez-Reyes, Arturo Abúndez-Pliego, Oscar Fernando Oliveros-Riego

{"title":"Assessment of the material properties effect on the response of Morrow’s Model for estimating the dissipation of energy in fatigue of metals","authors":"Víctor I. Rodríguez-Reyes, Arturo Abúndez-Pliego, Oscar Fernando Oliveros-Riego","doi":"10.1007/s11012-024-01868-1","DOIUrl":"10.1007/s11012-024-01868-1","url":null,"abstract":"<div><p>Morrow’s model has been widely used in recent years as part of new methodologies for assessing the fatigue life of metallic materials through the laws of thermodynamics. It is used to quantify the rate of dissipated energy in the fatigue process, represented by the hysteresis loop of the stress–strain diagram of the material. Then, the dissipated energy is used to quantify the entropy generation of the fatigue process. Morrow’s model is a function of the amplitude of the cyclic loading, and a few constants that represent material properties. However, despite its apparent simplicity, the material properties, when are experimentally obtained, usually exhibit dispersions that can lead to inaccurate calculations. In this work, the sensitivity of Morrow’s model to the variability of these parameters is evaluated. In order to assess the sensitivity, a constant amplitude value was set, and the quotient <span>({{sigma }_f^{'}}/{{sigma }_U})</span>, the fatigue strength coefficient <span>(sigma_f^{'})</span>, the fatigue ductility coefficient <span>({ epsilon_f^{'}})</span> and the cyclic strain hardening exponent <span>(n^{'})</span> were varied. A factorial design was conducted to determine the effects of the interactions of the material parameters on the response of Morrow’s model. The results showed that Morrow’s model is strongly sensitive to the above mentioned parameters, affecting its accuracy. In an extended case study, the fatigue fracture entropy and the fatigue life of Al2024-T3 were determined using material parameters from different sources in order to determine the influence of the material parameters in the assessment of the estimation of fatigue damage. The study allowed concluding that a meticulous statistical treatment is required when characterizing the material properties and the design engineer must be aware of possible inaccuracies if Morrow’s model is used for estimating fatigue life, specially in the new thermodynamic approaches.</p></div>","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"59 11","pages":"1847 - 1858"},"PeriodicalIF":1.9,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224531","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}

引用次数: 0