International Journal of Mechanical Sciences最新文献

筛选
英文 中文
Peridynamics model of viscoelasticity for beams and lattice structures 梁与晶格结构的粘弹性周动力学模型
IF 7.1 1区 工程技术
International Journal of Mechanical Sciences Pub Date : 2025-06-25 DOI: 10.1016/j.ijmecsci.2025.110545
Bhushan Sah, Sajal, Nilesh Choudhary, Kundan Kumar, Pranesh Roy
{"title":"Peridynamics model of viscoelasticity for beams and lattice structures","authors":"Bhushan Sah,&nbsp;Sajal,&nbsp;Nilesh Choudhary,&nbsp;Kundan Kumar,&nbsp;Pranesh Roy","doi":"10.1016/j.ijmecsci.2025.110545","DOIUrl":"10.1016/j.ijmecsci.2025.110545","url":null,"abstract":"<div><div>This paper concerns the development of peridynamics beam viscoelasticity theory to model creep deformation in beams and lattice structures. The idea here is to employ Simo’s hypothesis on deformation field in the three-dimensional viscoelastic constitutive equations and integrate over the cross-sectional area which leads to the reduced form of viscoelastic constitutive equations in terms of the force and moment resultants. Two evolution equations for internal variables emerge which are coupled with the beam viscoelastic constitutive equations. This provides a general framework where every material point in the beam has 6 + 6<em>p</em> number of degrees of freedom, viz., three displacement components, three incremental rotation components, and six components of two vector internal variables with <em>p</em> being the number of the internal variables. Time marching scheme and the update formulae for force and moment resultants and internal variables are developed. Numerical implementation strategy using the Newton-Raphson method is discussed in detail. Extensive numerical simulations and validation studies are carried out on creep deformation of cantilever beams, frame structures, truss-frames, and lattice structures, and creep failure of compression-torsion lattice which establish the effectiveness of the proposed method.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"301 ","pages":"Article 110545"},"PeriodicalIF":7.1,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144514241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Modelling of fiber metal laminates thermoforming using superimposed membrane-shell elements 金属纤维层压板热成形的膜壳叠加模型
IF 7.1 1区 工程技术
International Journal of Mechanical Sciences Pub Date : 2025-06-25 DOI: 10.1016/j.ijmecsci.2025.110518
Zheng Liu, Enrico Simonetto, Andrea Ghiotti, Stefania Bruschi
{"title":"Modelling of fiber metal laminates thermoforming using superimposed membrane-shell elements","authors":"Zheng Liu,&nbsp;Enrico Simonetto,&nbsp;Andrea Ghiotti,&nbsp;Stefania Bruschi","doi":"10.1016/j.ijmecsci.2025.110518","DOIUrl":"10.1016/j.ijmecsci.2025.110518","url":null,"abstract":"<div><div>This study presents an advanced numerical modelling framework for simulating the thermoforming of fiber metal laminates (FMLs) composed of AZ31B magnesium alloy sheets and thermoplastic polymer-based prepregs. The core innovation lies in the implementation of superimposed membrane-shell elements that simultaneously account for the out-of-plane compressive and in-plane tensile behaviors of the prepreg, as well as the inter-ply friction between the metallic and composite layers. This integrated model enables a more accurate prediction of forming loads and thickness evolution across a range of process parameters. To calibrate the model, uniaxial tensile and through-thickness compaction tests were performed on the prepreg to characterize its mechanical response at forming temperatures. Additional tensile tests were conducted on AZ31B sheets to capture their temperature-dependent thermomechanical behavior. The model was validated through thermoforming experiments on hat-shaped FML parts manufactured under varying blank-holder forces. The numerical predictions showed strong agreement with experimental data, with a maximum deviation of 8.9 % in forming force and 4.0 % in thickness distribution. These results confirm the robustness and predictive accuracy of the proposed modelling approach, offering a reliable tool for the virtual design and optimization of thermoformed hybrid laminates.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"302 ","pages":"Article 110518"},"PeriodicalIF":7.1,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144515885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Functionally graded spinodal nanoarchitected ceramics with unprecedented recoverability 具有空前可恢复性的功能梯度spinodal纳米结构陶瓷
IF 7.1 1区 工程技术
International Journal of Mechanical Sciences Pub Date : 2025-06-25 DOI: 10.1016/j.ijmecsci.2025.110453
Nishita Anandan, Colin G. Wilson, Lucas R. Meza
{"title":"Functionally graded spinodal nanoarchitected ceramics with unprecedented recoverability","authors":"Nishita Anandan,&nbsp;Colin G. Wilson,&nbsp;Lucas R. Meza","doi":"10.1016/j.ijmecsci.2025.110453","DOIUrl":"10.1016/j.ijmecsci.2025.110453","url":null,"abstract":"<div><div>A fundamental challenge for lightweight architected materials is their propensity for localized failure due to layered buckling, plastic shear-banding or fracture. Recent research efforts have used disorder to interrupt localization and enhance deformation, but most design strategies simply distribute the accumulation of damage, they do not prevent it from developing and propagating. This work explores how gradient architecture can be designed to hinder crack propagation and promote recoverability in nanostructured ceramic metamaterials. We experimentally and numerically investigated five different shell-based spinodal ceramic nanoarchitectures with 10-80 nm thick alumina films. These were fabricated using atomic layer deposition on sacrificial polymeric scaffolds written using two-photon lithography. All thin-walled (<span><math><mo>&lt;</mo></math></span>40 nm) architectures underwent shell buckling-dominated deformation and showed nearly full recovery after compression to <span><math><mo>∼</mo></math></span>45% strain, an expected result for this class of nanoarchitected materials. Thick-walled (<span><math><mo>&gt;</mo></math></span>40 nm) isotropic and anisotropic architectures experienced considerable local damage during compression and predictably showed permanent failure even at low strains. Unexpectedly, thick-walled conch-shell inspired gradient architectures showed localized damage but experienced a full recovery after compression to <span><math><mo>∼</mo></math></span>45% strain. This degree of recoverability has never been observed in this high density of a nanostructured ceramic, particularly one with visible local cracking during compression. This result stems from the length scale of the structural heterogeneity — the gradient layers were sufficiently small so as to inhibit the local damage development needed for crack propagation, thereby preventing catastrophic failure. Our findings have significant implications for how length scales and heterogeneity can be used to design failure-resistant materials from brittle constituents.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"301 ","pages":"Article 110453"},"PeriodicalIF":7.1,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144502349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Reynolds number effects on the flow around a 4:1 rectangular cylinder 雷诺数对4:1矩形圆柱绕流的影响
IF 7.1 1区 工程技术
International Journal of Mechanical Sciences Pub Date : 2025-06-24 DOI: 10.1016/j.ijmecsci.2025.110541
Hongyu Zhu , Haotian Dong , Xiaoqing Du
{"title":"Reynolds number effects on the flow around a 4:1 rectangular cylinder","authors":"Hongyu Zhu ,&nbsp;Haotian Dong ,&nbsp;Xiaoqing Du","doi":"10.1016/j.ijmecsci.2025.110541","DOIUrl":"10.1016/j.ijmecsci.2025.110541","url":null,"abstract":"<div><div>Two-dimensional (2D) laminar and three-dimensional (3D) large-eddy simulations (LES) are performed to comprehensively investigate the flow dynamics and aerodynamic characteristics of uniform flow around a 4:1 rectangular cylinder at Reynolds number <em>Re</em> = 1–1.2 × 10<sup>5</sup>. Four distinct flow regimes are found: steady flow (Regime Ⅰ, <em>Re</em> &lt; 92), unsteady laminar flow (Regime Ⅱ, 92 ≤ <em>Re</em> &lt; 4.5 × 10<sup>2</sup>), wake transition (Regime Ⅲ, 4.5 × 10<sup>2</sup> ≤ <em>Re</em> &lt; 7.0 × 10<sup>2</sup>), and shear layer transition (Regime Ⅳ, 7.0 × 10<sup>2</sup> ≤ <em>Re</em> ≤ 1.2 × 10<sup>5</sup>). In Regime I, for <em>Re</em> &lt; 3 (Regime I-a), flow fully attaches to surfaces, namely 'creeping' flow; for 3 ≤ <em>Re</em> &lt; 92 (Regime Ⅰ-b), flow separates from trailing edges, forming a steady recirculation region in the wake, namely steady separated regime. In Regime Ⅱ, for 92 ≤ <em>Re</em> &lt; 1.2 × 10<sup>2</sup> (Regime Ⅱ-a), flow separates from trailing-edge corners and forms laminar Kármán vortices; for 1.2 × 10<sup>2</sup> ≤ <em>Re</em> &lt; 3.0 × 10<sup>2</sup> (Regime Ⅱ-b), flow separates from leading-edge corners, reattaches to lateral surfaces with symmetrical steady separation bubbles, and separates again from trailing-edge corners; for 3.0 × 10<sup>2</sup> ≤ <em>Re</em> &lt; 4.5 × 10<sup>2</sup> (Regime Ⅱ-c), flow changes from Kármán vortices to impinging-leading-edge-vortex (ILEV) instability, causing Strouhal number (<em>St</em>) to suddenly drop from 0.162 (<em>Re</em> = 2.75 × 10<sup>2</sup>) to 0.130 (<em>Re</em> = 3.0 × 10<sup>2</sup>). In Regime Ⅲ, wake vortices transition from laminar to turbulence with ILEV instability. In Regime Ⅳ, separated shear layers transition to turbulence, and transition position moves upstream as <em>Re</em> increases.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"301 ","pages":"Article 110541"},"PeriodicalIF":7.1,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144502347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Undeformed chip thickness modeling in EUVAG considering wheel topography evolution 考虑车轮形貌演化的EUVAG无变形切屑厚度建模
IF 7.1 1区 工程技术
International Journal of Mechanical Sciences Pub Date : 2025-06-24 DOI: 10.1016/j.ijmecsci.2025.110540
Kun Zhang , Zhen Yin , Yanjun Lu , Chenwei Dai , Qinglong An , Zhiqiang Liang , Qing Miao , Ming Zhang , Ziyang Cao , Hua Li
{"title":"Undeformed chip thickness modeling in EUVAG considering wheel topography evolution","authors":"Kun Zhang ,&nbsp;Zhen Yin ,&nbsp;Yanjun Lu ,&nbsp;Chenwei Dai ,&nbsp;Qinglong An ,&nbsp;Zhiqiang Liang ,&nbsp;Qing Miao ,&nbsp;Ming Zhang ,&nbsp;Ziyang Cao ,&nbsp;Hua Li","doi":"10.1016/j.ijmecsci.2025.110540","DOIUrl":"10.1016/j.ijmecsci.2025.110540","url":null,"abstract":"&lt;div&gt;&lt;div&gt;To investigate the evolution of wheel topography and grinding performance under elliptical ultrasonic vibration-assisted grinding (EUVAG), silicon carbide (SiC) ceramics were selected as the material for processing. Comparative experiments involving wheel wear tests and grinding performance tests were conducted for both conventional grinding (CG) and EUVAG. This study proposes and establishes a novel method for determining the undeformed chip thickness distribution under EUVAG, utilizing it as a key parameter to link the evolution of wheel topography with grinding outcomes. The undeformed chip thickness model takes into account the dynamic effects of wheel and the unevenness of grain height, and is further modified by considering the material elastic-plastic micro deformation. First, to elucidate the influence of elliptical ultrasonic vibration on the evolution of wheel topography, the wear patterns of grains on wheel surface were characterized, including statistical analyses of the wear platform and cutting height of grains. Compared to CG, the occurrence of clearance surfaces and grain detachment is delayed in EUVAG, and there is an increase of 11.2 % to 25.1 % in the wear platform area &lt;em&gt;A&lt;sub&gt;uw&lt;/sub&gt;&lt;/em&gt;. Subsequently, the coupled effects of wheel wear states, elliptical ultrasonic vibration parameters, and grinding process parameters on key grinding performance indicators were analyzed from the perspective of undeformed chip thickness distribution. The results demonstrated that increasing the wheel speed to reduce &lt;em&gt;μ&lt;/em&gt;&lt;sub&gt;2&lt;/sub&gt; is an effective approach for achieving lower grinding forces in EUVAG, the reduction amplitude is from 25 % to 46 %. Expanding the range of &lt;em&gt;μ&lt;/em&gt;&lt;sub&gt;2&lt;/sub&gt; can significantly reduce grinding specific energy. For applications requiring low surface roughness, controlling &lt;em&gt;μ&lt;/em&gt;&lt;sub&gt;2&lt;/sub&gt; at a lower mean value with a more uniform distribution can be achieved by increasing the wheel speed and decreasing the workpiece feed rate. The optimal surface roughness is 0.187 μm when &lt;em&gt;v&lt;sub&gt;s&lt;/sub&gt;&lt;/em&gt; = 24 m/s. Reducing the range of &lt;em&gt;μ&lt;/em&gt;&lt;sub&gt;2&lt;/sub&gt; and the proportion of undeformed chip thickness facilitates a higher plastic removal ratio, while lowering &lt;em&gt;μ&lt;/em&gt;&lt;sub&gt;1&lt;/sub&gt; enhances plastic removal efficiency. The improvement in material removal rate achieved by EUVAG was observed to increase initially and then decrease with progressive wear of wheel, and the optimal improvement is 17.9 % achieved at wear state 4. Finally, by analyzing the mapping relationships between machining results and the distribution characteristics of undeformed chip thickness under various machining parameters, an efficient and low-damage prediction model for EUVAG of SiC ceramics was developed. It was found that the parameter combination [&lt;em&gt;v&lt;sub&gt;s&lt;/sub&gt;&lt;/em&gt;=20 m/s, &lt;em&gt;v&lt;sub&gt;w&lt;/sub&gt;&lt;/em&gt;=50 mm/min, &lt;em&gt;a&lt;sub&gt;p&lt;/sub&gt;&lt;/em&gt;=10 µm, &lt;em&gt;A&lt;sub&gt;z&lt;/sub&gt;&lt;/em&gt;=2.668 µm] provides an optimal balance between machini","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"302 ","pages":"Article 110540"},"PeriodicalIF":7.1,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144534895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Data-driven topology design with persistent homology for enhancing population diversity 具有持久同源性的数据驱动拓扑设计,增强种群多样性
IF 7.1 1区 工程技术
International Journal of Mechanical Sciences Pub Date : 2025-06-24 DOI: 10.1016/j.ijmecsci.2025.110493
Taisei Kii , Kentaro Yaji , Hiroshi Teramoto , Kikuo Fujita
{"title":"Data-driven topology design with persistent homology for enhancing population diversity","authors":"Taisei Kii ,&nbsp;Kentaro Yaji ,&nbsp;Hiroshi Teramoto ,&nbsp;Kikuo Fujita","doi":"10.1016/j.ijmecsci.2025.110493","DOIUrl":"10.1016/j.ijmecsci.2025.110493","url":null,"abstract":"<div><div>This paper proposes a selection strategy for enhancing population diversity in data-driven topology design (DDTD), a topology optimization framework based on evolutionary algorithms (EAs) using a deep generative model. While population diversity is essential for global search with EAs, conventional selection operators that preserve diverse solutions based on objective values may still lead to a loss of population diversity in topology optimization problems due to the high dimensionality of design variable space and strong nonlinearity of evaluation functions. Motivated by the idea that topology is what characterizes the inherent diversity among material distributions, we employ a topological data analysis method called persistent homology. As a specific operation, a Wasserstein distance sorting between persistence diagrams is introduced into a selection algorithm to maintain the intrinsic population diversity. We apply the proposed selection operation incorporated into DDTD to a stress-based topology optimization problem as a numerical example. The results confirm that topological features extracted via persistent homology can be appropriately quantified using the Wasserstein distance, and incorporating them into the selection operation significantly enhances the search performance of DDTD.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"301 ","pages":"Article 110493"},"PeriodicalIF":7.1,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144502348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Large deformation of a punctured disc with the target morphology 大变形的穿孔椎间盘与目标形态
IF 7.1 1区 工程技术
International Journal of Mechanical Sciences Pub Date : 2025-06-23 DOI: 10.1016/j.ijmecsci.2025.110527
B.Q. Li, L.X. Li
{"title":"Large deformation of a punctured disc with the target morphology","authors":"B.Q. Li,&nbsp;L.X. Li","doi":"10.1016/j.ijmecsci.2025.110527","DOIUrl":"10.1016/j.ijmecsci.2025.110527","url":null,"abstract":"<div><div>Thin sheets widely exist in nature. Studying their fascinating morphologies in three-dimensional space is not only a fundamental scientific issue but of significant practical applications. Utilizing differential manifolds based on the Riemannian metric, this paper addresses the large deformation of a sheet. First, with the polar coordinates, the two-dimensional manifold of a punctured disc and the metric tensor induced by a temperature field are described, providing a geometric interpretation of the thermal deformation mechanism. Next, the equilibrium equations and the boundary conditions for the large deformation of a target cone are derived. Finally, given the temperature field, the deformation and the residual stress are solved. The temperature distribution is also obtained for the stress-free target cone. The results indicate that both the temperature field and the target morphology significantly impact the deformation and the residual stress. This work is a straightforward extension of the customary in-plane thermal deformation theory to the two-dimensional manifold in the three-dimensional Euclidean space, and hence provides the fundamental theory and the solution technique for the finer design of thin sheets.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"301 ","pages":"Article 110527"},"PeriodicalIF":7.1,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144518378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Elimination of electrode corrugations via a two-step calendering process 通过两步压延工艺消除电极波纹
IF 7.1 1区 工程技术
International Journal of Mechanical Sciences Pub Date : 2025-06-23 DOI: 10.1016/j.ijmecsci.2025.110525
Zejun Fu , Rui Zhang , Zhutian Xu , Linfa Peng
{"title":"Elimination of electrode corrugations via a two-step calendering process","authors":"Zejun Fu ,&nbsp;Rui Zhang ,&nbsp;Zhutian Xu ,&nbsp;Linfa Peng","doi":"10.1016/j.ijmecsci.2025.110525","DOIUrl":"10.1016/j.ijmecsci.2025.110525","url":null,"abstract":"<div><div>Calendering is a crucial process in the manufacturing of lithium-ion batteries electrodes. Corrugations occur frequently in the electrode during calendering, leading to challenges in large-scale and low-cost production of lithium-ion batteries in industry. An in-depth understanding of the formation mechanism of electrode corrugations during calendering process is essential to improve the process and eliminate the corrugations. To do so, compression and tension experiments were first performed to obtain the mechanical properties of the porous active material for electrodes. The Drucker-Prager Cap (DPC) model was calibrated based on experimental results, and employed to capture the plastic deformation of the active material in the calendering process. The current collector foil was revealed to be responsible for the formation of corrugations, which hindered the elongation of the calendered active material. Based on the elongation difference obtained, a novel two-step process introducing a pre-elongation step was proposed. In the pre-elongation step, the rolling pressure was determined by simulation to elongate the foil by 0.75 %, enabling the elongation of the foil to match that of the active material in the next step. By using this new process, the corrugations of the calendered electrodes were significantly suppressed without requiring large web tensions. The intensity of the corrugations was reduced by &gt;60 %, which is of great significance to reduce the calendered electrode defects, scrap rates, and manufacturing costs of lithium-ion batteries.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"301 ","pages":"Article 110525"},"PeriodicalIF":7.1,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144470213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Optimized hexagonal perforated honeycomb–chiral metamaterial for multidirectional energy absorption 优化的六边形多孔蜂窝-多向吸能手性超材料
IF 7.1 1区 工程技术
International Journal of Mechanical Sciences Pub Date : 2025-06-23 DOI: 10.1016/j.ijmecsci.2025.110521
Yinchuan He , Guoxing Lu , Tingting Wang , Li Wang , Kwong Ming Tse
{"title":"Optimized hexagonal perforated honeycomb–chiral metamaterial for multidirectional energy absorption","authors":"Yinchuan He ,&nbsp;Guoxing Lu ,&nbsp;Tingting Wang ,&nbsp;Li Wang ,&nbsp;Kwong Ming Tse","doi":"10.1016/j.ijmecsci.2025.110521","DOIUrl":"10.1016/j.ijmecsci.2025.110521","url":null,"abstract":"<div><div>This paper introduces a novel hexagonal perforated honeycomb-chiral (HPH-C) structure, achieved by integrating curved perforated rib elements into a hexagonal perforated framework. The incorporation of curved ribs forms rotating chiral units, imparting distinctive deformation characteristics under radial compression, including rotational and winding bending behaviors. This innovative structural design substantially enhances the energy absorption capacity in the radial direction. Under axial compression, the structure demonstrates pronounced negative Poisson's ratio behavior by contracting and deforming toward regions of reduced stiffness near the perforations, further augmenting its energy absorption capacity. Quantitative comparisons with the original structure indicate that while the innovative design increases weight by 107%, the specific energy absorption (SEA) under radial compression is improved by 200% and under axial compression by 111%. The proposed design approach introduces innovative strategies for achieving multidimensional impact protection in metamaterials. Leveraging the advantages of additive manufacturing, this study highlights the significant potential of perforated negative Poisson's ratio metamaterials to advance the development and application of multi-dimensional, multi-scale energy-absorbing structures in engineering fields.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"301 ","pages":"Article 110521"},"PeriodicalIF":7.1,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144547962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Out-of-plane vibration analysis of circular curved beam with attachments 带附件圆弯曲梁的面外振动分析
IF 7.1 1区 工程技术
International Journal of Mechanical Sciences Pub Date : 2025-06-22 DOI: 10.1016/j.ijmecsci.2025.110508
Longkai Chen, Chao Zhang
{"title":"Out-of-plane vibration analysis of circular curved beam with attachments","authors":"Longkai Chen,&nbsp;Chao Zhang","doi":"10.1016/j.ijmecsci.2025.110508","DOIUrl":"10.1016/j.ijmecsci.2025.110508","url":null,"abstract":"<div><div>Generalized functions are widely used in structural mechanics to address discontinuities in beam-like structures. However, for circular curved beams, bending torsion coupling and intrinsic curvature often prevent the modal functions from being expressed as simple linear combinations of standard trigonometric and hyperbolic functions. This limitation restricts the applicability of the generalized function method to vibration analysis of circular curved beams. This paper presents an analytical solution for the out-of-plane free and forced vibrations of circular curved beams with various attachments under arbitrary boundary conditions. These discrete attachments include translational dampers, torsional-rotational dampers, bending-rotational dampers and attached masses. By successfully utilizing generalized function theory to address discontinuities in response variables of circular curved beam, the proposed method overcomes the limitations of traditional methods, such as beam segmentation, Green’s functions, and Lagrange multipliers. This study provides exact closed-form expressions for natural frequencies, mode shapes, and frequency response functions (FRFs) through a simple process. Furthermore, regardless of the number of attachments, the characteristic matrices remain 6 × 6 in size, offering significant computational advantages and eliminating the repetitive and complex matrix inversion required by some traditional methods. The accuracy and versatility of the proposed approach are validated by comparison with experimental and theoretical results from the literature and with finite element method (FEM) results developed in this study. Additionally, parametric studies on selected examples reveal the influence of various parameters on the system's dynamic behavior.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"301 ","pages":"Article 110508"},"PeriodicalIF":7.1,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144490634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信