Mechanics Research Communications最新文献_第3页

Vibration analysis of functionally graded nanobeam in thermal environment 热环境下功能梯度纳米梁的振动分析

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2025-06-19 DOI: 10.1016/j.mechrescom.2025.104471

Chen Chen, Haowen Yan

{"title":"Vibration analysis of functionally graded nanobeam in thermal environment","authors":"Chen Chen, Haowen Yan","doi":"10.1016/j.mechrescom.2025.104471","DOIUrl":"10.1016/j.mechrescom.2025.104471","url":null,"abstract":"<div><div>Functionally graded (FG) nanobeams, as a key application of functionally graded materials (FGMs), demonstrate unique thermomechanical properties that make them particularly suitable for Micro-electromechanical Systems (MEMS) and other nanoscale applications. This study presents an analytical approach for investigating their vibration characteristics under linear and nonlinear temperature fields. The model integrates Euler–Bernoulli beam theory with nonlocal elasticity theory, thereby simultaneously capturing material gradation effects and size-dependent phenomena. A novel analytical framework is developed by applying the transfer function method (TFM) for the first time to the nonlocal Euler–Bernoulli beam model, enabling efficient analytical solution for natural frequencies. Unlike traditional numerical methods, the proposed method enhances computational efficiency and allows unified treatment of various boundary conditions. Numerical studies are conducted to comprehensively evaluate the effects of environment fields, constituent volume distribution, slenderness ratio, nonlocal parameters, and boundary conditions on the vibration behavior of FG nanobeams. The results offer valuable insights for the design and optimization of MEMS devices, thermally stressed aerospace components, and microscale biomedical structures operating in complex thermal environments.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":"148 ","pages":"Article 104471"},"PeriodicalIF":1.9,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144489417","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

On the Maxwell–Eshelby relation in the theory of 6-parameter elastic shells 六参数弹性壳理论中的Maxwell-Eshelby关系

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2025-06-19 DOI: 10.1016/j.mechrescom.2025.104451

Mircea Bîrsan , Milad Shirani

引用次数: 0

Micromechanical buckling analysis of soft lattice metamaterials accounting for randomly distributed imperfections 考虑随机分布缺陷的软晶格超材料的微力学屈曲分析

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2025-06-13 DOI: 10.1016/j.mechrescom.2025.104450

Luca Parente , Daniela Addessi , Paolo Di Re , Cristina Gatta , Elio Sacco

引用次数: 0

New hinge design for fibrous metamaterial enables for filament 3D printing 纤维超材料的新铰链设计使长丝3D打印成为可能

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2025-06-13 DOI: 10.1016/j.mechrescom.2025.104452

Giulio Sanna , Mario Pistis , Ivan Giorgio , Victor A. Eremeyev , Mario Spagnuolo

引用次数: 0

Experimental and numerical investigation of defect modes in periodic expansion chamber mufflers 周期膨胀室消声器缺陷模态的实验与数值研究

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2025-06-13 DOI: 10.1016/j.mechrescom.2025.104453

Adriano M. Goto, Wanderson V. de O. Monteiro, José Maria C. Dos Santos

{"title":"Experimental and numerical investigation of defect modes in periodic expansion chamber mufflers","authors":"Adriano M. Goto, Wanderson V. de O. Monteiro, José Maria C. Dos Santos","doi":"10.1016/j.mechrescom.2025.104453","DOIUrl":"10.1016/j.mechrescom.2025.104453","url":null,"abstract":"<div><div>Phononic Crystals (PCs) remain a prominent research topic in vibration and sound control. PCs are artificial materials constructed from a periodic arrangement of unit cells exhibiting high impedance variation. This periodicity can provide remarkable properties. For sound control problems, the expansion chamber muffler (ECM) can be analyzed as a PC structure when its acoustic performance is periodically enhanced, thereby promoting bandgaps. However, these properties may be affected by a disruption in periodicity, which occurs when some geometric parameters exhibit variation. Such disruption leads to the emergence of an additional mode within the bandgap region, referred to as a defect mode. The present study investigates the effects of periodicity disruption in an ECM structure and the influence of each geometric parameter of the ECM silencer. The two-dimensional transfer matrix (2D-TM) method is implemented to compute the response under geometric variations. Dispersion diagrams, transmission loss, and frequency response function curves are numerically evaluated and experimentally validated for multiple scenarios. The results show that the ECM is highly sensitive to certain geometric parameters, which can significantly influence the acoustic performance of these silencers due to defect modes.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":"148 ","pages":"Article 104453"},"PeriodicalIF":1.9,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144290516","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-based versus stress-based material failure criteria: The experimental assessment 基于能量与基于应力的材料失效标准：实验评估

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2025-06-11 DOI: 10.1016/j.mechrescom.2025.104445

Suhib Abu-Qbeitah , Konstantin Y. Volokh , Stephan Rudykh

{"title":"Energy-based versus stress-based material failure criteria: The experimental assessment","authors":"Suhib Abu-Qbeitah , Konstantin Y. Volokh , Stephan Rudykh","doi":"10.1016/j.mechrescom.2025.104445","DOIUrl":"10.1016/j.mechrescom.2025.104445","url":null,"abstract":"<div><div>Previous studies have reported fracture localization within the inclusions of 3D-printed staggered composites, despite their significantly higher strength compared to the matrix – a seemingly counterintuitive phenomenon. In this letter, we investigate whether material failure is governed by the volumetric energy of fracture rather than the maximum stress criterion. We perform experiments on the constituent phases of 3D-printed staggered composites to evaluate the validity of energy-based failure criteria. Our findings support the idea that the work of fracture, rather than strength, governs failure. Specifically, at relatively higher strain rates, the ability of the soft matrix to absorb more energy before failure suggests that fracture localization is driven by energy considerations rather than stress thresholds. This aligns with previous observations that inclusions may fail before the matrix despite their higher strength. More broadly, since engineering materials often exhibit a crystalline molecular structure where failure is dictated by the energy required to break atomic and molecular bonds, it naturally follows that the work of fracture – rather than strength – should serve as the primary failure criterion. Our results reinforce this perspective, offering a more physically grounded approach to predicting material failure.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":"148 ","pages":"Article 104445"},"PeriodicalIF":1.9,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144271430","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

Applicability of the Wöhler Curve Method for fatigue life assessment of metallic materials in low and extremely low cycle fatigue regime Wöhler曲线法在低周和极低周疲劳状态下金属材料疲劳寿命评估中的适用性

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2025-06-10 DOI: 10.1016/j.mechrescom.2025.104465

Xiangqiao Yan

引用次数: 0

Inverse magnetostrictive properties of twisted Fe–Co alloy wire 扭曲铁钴合金丝的反磁致伸缩性能

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2025-06-10 DOI: 10.1016/j.mechrescom.2025.104467

Hiroki Kurita, Zhenjin Wang, Fumio Narita

引用次数: 0

Laser ultrasonic detection of defects in a regular tetrahedral lattice structure based on finite element modeling 基于有限元建模的正四面体点阵结构缺陷激光超声检测

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2025-06-06 DOI: 10.1016/j.mechrescom.2025.104466

Yibo Ren, Xuzhi Fu, Jinping Zhang, Yueyang Zhang, Yu Zhan

{"title":"Laser ultrasonic detection of defects in a regular tetrahedral lattice structure based on finite element modeling","authors":"Yibo Ren, Xuzhi Fu, Jinping Zhang, Yueyang Zhang, Yu Zhan","doi":"10.1016/j.mechrescom.2025.104466","DOIUrl":"10.1016/j.mechrescom.2025.104466","url":null,"abstract":"<div><div>Lattice structures possess advantages such as ultra-lightweight, high strength, and high stiffness. However, they often exhibit defects during manufacture and service. Due to the complexity of their structure, detecting these defects can be challenging. Laser ultrasonic technology has emerged as a promising detection method, particularly suited for lattice structures. In this paper, a regular tetrahedral lattice structure model is established, and the finite element method is employed to analyze the propagation characteristics of laser-induced ultrasonic waves within the structure and investigate the impact of various defect types on these ultrasonic waves. Firstly, the thermodynamic coupling model for laser-induced ultrasonic waves in the lattice structure is established and the propagation rules of ultrasonic waves at different locations is discussed. Secondly, the models for different types of lattice structure defects are created and the effects of defect location and depth on ultrasonic wave propagation are analyzed. The results indicate that the modes of ultrasonic wave propagation in the upper sandwich plate are shear wave, longitudinal wave, and Rayleigh wave, while the ultrasonic wave propagation on the surface of the support rod is characterized as longitudinal wave. When the defect is present on the support rod, positioning the probe points directly above the defect on the support rod proves to be highly effective for detection. Furthermore, when cracks occur at the junction between the support rod and the upper sandwich plate, distinct reflected wave can be observed on the upper surface of the upper sandwich plate. Additionally, as the depth of the crack increases, the amplitude of the reflected wave progressively rises, exhibiting a nonlinear trend.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":"148 ","pages":"Article 104466"},"PeriodicalIF":1.9,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279622","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

Longitudinal wave propagation in coupled triple-layer mass–spring chains: Discrete and continuum models 耦合三层质量-弹簧链中的纵波传播：离散和连续模型

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2025-06-06 DOI: 10.1016/j.mechrescom.2025.104446

E. Ghavanloo

引用次数: 0