Mechanics Research Communications最新文献_第6页

Dynamic perforation behavior of closed-cell aluminium foams and foam core sandwich panels with various shaped projectile tips 不同形状弹尖闭孔泡沫铝及泡沫芯夹芯板的动力穿孔行为

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2025-06-26 DOI: 10.1016/j.mechrescom.2025.104472

M.A. Islam , M.A. Kader , J.P. Escobedo

{"title":"Dynamic perforation behavior of closed-cell aluminium foams and foam core sandwich panels with various shaped projectile tips","authors":"M.A. Islam , M.A. Kader , J.P. Escobedo","doi":"10.1016/j.mechrescom.2025.104472","DOIUrl":"10.1016/j.mechrescom.2025.104472","url":null,"abstract":"<div><div>This paper investigates the shape effects of projectile tips on the perforation behavior of closed-cell aluminium foams and foam core sandwich panels under low velocity impact. The density and thickness of the selected foam were 0.5 g/cc and 21 mm, respectively. The thickness of the aluminium face sheets used in the sandwich panel was 1 mm. The impact perforation experiments were conducted using fifteen additively manufactured aluminium alloy projectile tips of various cone angles and geometrical shapes. The tests were carried out using an instrumented drop tower with an impact velocity of 6 ms<sup>-1</sup> (impact energy 105 J) for the foam panels and 10 ms<sup>-1</sup> (impact energy 274 J) for the foam core sandwich panels. The impact responses of the foams and foam core sandwich panels, such as perforation resistance force, perforation energy absorption, and failure modes for the studied projectile tips, were investigated. The results indicate that the projectile tip shape and angle have an influence on the impact responses of foams and foam core sandwich panels. The highest peak force and energy absorption enhancement are observed for the pencil and cone-type projectile, respectively, for changing the angles from 20° to 30°. An approximately three-fold rise in energy absorption is observed for the sandwich panels because of the additional force required to perforate the face sheets.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":"148 ","pages":"Article 104472"},"PeriodicalIF":1.9,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517654","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

Post-critical behavior of cantilever simply supported beam on an elastic foundation 弹性基础上悬臂简支梁的后临界性能

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2025-06-24 DOI: 10.1016/j.mechrescom.2025.104469

Sanja J. Mihok, Armin D. Berecki, Lidija Z. Rehlicki Lukešević

引用次数: 0

Mathematical solutions for moving generalized electric-magnetic-polarization saturation models in magneto-electro-elastic materials via weight functions 磁-电弹性材料中运动广义电-磁极化饱和模型的权函数解

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2025-06-21 DOI: 10.1016/j.mechrescom.2025.104464

Sandeep Singh

{"title":"Mathematical solutions for moving generalized electric-magnetic-polarization saturation models in magneto-electro-elastic materials via weight functions","authors":"Sandeep Singh","doi":"10.1016/j.mechrescom.2025.104464","DOIUrl":"10.1016/j.mechrescom.2025.104464","url":null,"abstract":"<div><div>This work presents an advanced analytical framework for solving moving generalized electric-magnetic-polarization saturation models in magneto-electro-elastic materials. The core methodology employs a weight function approach, which serves as a kernel to map applied electro-mechanical loads to stress intensity factors. The derivation involves solving boundary conditions using the crack opening displacement solution. A key contribution is the generalized strip yield model introduces a non-linear function <span><math><mrow><mi>g</mi><mrow><mo>(</mo><mi>x</mi><mo>)</mo></mrow></mrow></math></span> in the form <span><math><mrow><mo>(</mo><mi>g</mi><mrow><mo>(</mo><mi>x</mi><mo>)</mo></mrow><msub><mrow><mi>D</mi></mrow><mrow><mi>s</mi></mrow></msub><mo>=</mo><mfrac><mrow><mrow><mo>|</mo><msup><mrow><mi>x</mi></mrow><mrow><mi>n</mi></mrow></msup><mo>|</mo></mrow></mrow><mrow><msup><mrow><mi>b</mi></mrow><mrow><mi>n</mi></mrow></msup></mrow></mfrac><msub><mrow><mi>D</mi></mrow><mrow><mi>s</mi></mrow></msub><mo>)</mo></mrow></math></span>. This allows flexibility in modeling saturation effects under varying displacement fields. Different <span><math><mrow><mi>n</mi><mo>−</mo></mrow></math></span> values correspond to different material responses, enabling the model to capture a range of non-linear behaviors. Validate the generalized strip yield model’s results by comparing them with solutions obtained via the stress function approach. Perform simulations to study crack-face boundary conditions under prescribed electro-mechanical loading. The results illustrate how SIFs vary with the size of the induction zone, saturation parameters, and the applied electro-mechanical fields. The agreement between the generalized model and direct analytical methods supports its accuracy.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":"148 ","pages":"Article 104464"},"PeriodicalIF":1.9,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144364376","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

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