International Journal of Mechanical Sciences最新文献

{"title":"Reconfigurable lattice structures with programmable deformation modes under electrothermal actuation","authors":"Kai Zhang ,&nbsp;Jinyu Ji ,&nbsp;Dengbao Xiao ,&nbsp;Xiaogang Guo ,&nbsp;Daining Fang","doi":"10.1016/j.ijmecsci.2025.110212","DOIUrl":"10.1016/j.ijmecsci.2025.110212","url":null,"abstract":"<div><div>Reconfigurable structures with programmable deformation behaviors present significant promise in fields of multifunctional antennas, flexible electronic device and soft robotics, for the capability of achieving multiple mechanical responses in a single structure. However, most previous researches have focused primarily on designing some basic deformation modes for the reconfigurable structures (i.e., shrinkage, expansion and simple shear deformation modes), which limits the exploration of a broader range of complex deformation modes in the reconfigurable structures. This study reports the design strategies for a class of reconfigurable three-phase lattice composite structures with programmable deformation modes under electrothermal actuation. The effective strain matrix is defined to characterize the finite deformation of the lattice composite structures. In addition to five basic deformation modes of the lattice composite structures, several coupled deformation modes are achieved in the lattice structures via specific actuation approaches, including bidirectional programmable shrinkage and expansion deformation, the coupled deformation modes of shearing and expansion or shrinkage. The two elements, and even three elements, of the effective strain matrices of the lattice structures are designed simultaneously, significantly enriching the deformation modes of the structures. A large deformation model is developed to describe the multiple deformation behaviors of the lattice composite structures, the accuracy of which is validated by the FEA and experimental results. Moreover, the experiments demonstrate that multiple deformation behaviors could be obtained in a single lattice composite structure by different actuation approaches. Therefore, this study offers insights for further studies into reconfigurable lattice structures with programmable deformation modes, and enhance the potential applications in fields of multifunctional antennas, flexible electronic device and reconfigurable soft robotic.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"293 ","pages":"Article 110212"},"PeriodicalIF":7.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761119","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}

{"title":"Investigation of dynamic fractures under varying stress states","authors":"Yi Shen,&nbsp;Tianbao Ma,&nbsp;Jianqiao Li","doi":"10.1016/j.ijmecsci.2025.110177","DOIUrl":"10.1016/j.ijmecsci.2025.110177","url":null,"abstract":"<div><div>The dynamic fracture behaviours of metallic materials vary significantly under different stress states, and the study on them is of great significance in guiding the design of engineering structures and improving their fracture resistance. To investigate the effect of the stress state on dynamic fractures, five newly designed specimens were proposed to produce different loading states, and the investigation was conducted using the traditional Split Hopkinson Pressure Bar (SHPB) device. In this study, the macroscopic fracture behaviour and microscopic void morphology were analysed under different loading rates and stress states. Subsequently, dynamic fractures under different stress states were investigated via numerical simulations using different damage models. Finally, the effects of specimen factors on the reliability of studying dynamic fractures using the newly proposed method were analysed using both experimental and numerical methods. All the results confirmed that the proposed experimental method is effective and simple for studying dynamic fractures under shear-to tensile-dominated states. The stress states are stable and controllable by changing the specimen shape. Moreover, both the microscopic void coalescence orientation and macroscopic fracture features are determined by the competition between the tensile and shear stresses. The proposed experimental method provides a new and reliable method for testing dynamic fracture behaviour of typical metallic materials under shear- to tensile-dominated states using the traditional SHPB device.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"293 ","pages":"Article 110177"},"PeriodicalIF":7.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761120","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}

{"title":"Nonlinear vibration of corrugated-honeycomb cylindrical shells in thermal environments","authors":"Bocheng Dong,&nbsp;Rui Zhao,&nbsp;Kaiping Yu","doi":"10.1016/j.ijmecsci.2025.110200","DOIUrl":"10.1016/j.ijmecsci.2025.110200","url":null,"abstract":"<div><div>To balance the weight-saving and mechanical compensation features of lightweight engineering structures, fresh composite sandwich cylindrical shells with three-phase hybrid composite skins and a corrugated core filled with hexagonal honeycombs are designed. A matched dynamic model is first proposed to disclose the nonlinear vibration behaviors, including the nonlinear frequency, the amplitude-frequency attribute, and the phase plane manifestation during primary, sub-harmonic, and super-harmonic resonance occurrences, while the thermal effect is taken into account. The equivalent stiffness parameters of the core are derived using the strain energy invariance principle at macro and micro scales, and the variable material properties of the three-phase hybrid composite skins incorporating material-filled defects are characterized through the Halpin-Tsai technique and mixture law. The first-order shear deformation theory merging geometric large deformations and the Euler-Lagrange equation is adopted to integrate the modeling framework, in which the thermal expansions induced by temperature climbs are given via Green-Lagrange nonlinear strains, and the static condensation and time-domain multiscale methods achieve nonlinear vibration solutions. After the model is proven to work, the nonlinear frequency and various harmonic resonance behaviors are characterized under different configuration schemes and heat impacts, with the influence mechanisms being elucidated. Some actionable guidelines for improving the dynamic capabilities of the structure are provided.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"293 ","pages":"Article 110200"},"PeriodicalIF":7.1,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761086","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}

{"title":"Generation of micro-textures by three-dimensional vibration-assisted fly cutting","authors":"Guoqing Zhang ,&nbsp;Minghua Pan ,&nbsp;Shuaikang Cao ,&nbsp;Zejia Huang ,&nbsp;Yuting Ma","doi":"10.1016/j.ijmecsci.2025.110179","DOIUrl":"10.1016/j.ijmecsci.2025.110179","url":null,"abstract":"<div><div>Micro-nano textured surfaces exhibit unique functional properties and therefore are extensively applied in the industrial fields such as healthcare and defense. Generally, ultra-precision machining is believed to be an ideal means for fabricating micro-nano textured, especially for vibration-assisted single-point diamond turning. However, vibration-assisted single-point diamond turning also presents challenges in machining micro-grooved or micro-textured surfaces, especially with high curvature properties. Therefore, the present study developed a three-dimensional vibration-assisted fly cutting system to machine micro-texture surfaces. First, a novel three-dimensional vibration platform was designed and utilized to generate the required vibration for modulation the fly cutting tool path, whereby a three-dimensional (X/Y/Z) vibration-assisted fly cutting system is developed by integrating the modified tool offset fly cutting machine tool. Then, by employing the vibration-assisted fly cutting system, sinusoidal excitation signals in the X, Y, and Z directions are generated and combined to create convex bamboo-like micro-textures, concave-convex micro-textures, concave bamboo-like micro-textures, and concave-convex bamboo-like micro-textures. Finally, an analysis of the influencing factors for the generation of concave-convex bamboo-like micro-textures was conducted, and relevant conclusions were drawn. Research results show that by varying the frequency and initial phase of the sinusoidal excitation signals, concave-convex bamboo-like micro-textures with different boundary characteristics were obtained; by adjusting the cutting depth of the tool, concave-convex bamboo-like micro-textures with varying morphologies were achieved. The micro-textured surfaces prepared in this study exhibit excellent surface morphology, proving the effectiveness and reliability of the machining system, which provides valuable insights for the fabrication of micro-textures.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"291 ","pages":"Article 110179"},"PeriodicalIF":7.1,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734832","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}

{"title":"Mechanical-thermal coupling of carbon fiber/aluminum/silicone foams under axial loading","authors":"Han Du ,&nbsp;Panpan Weng ,&nbsp;Chao Fang ,&nbsp;Juanjuan Zhang ,&nbsp;George J. Weng","doi":"10.1016/j.ijmecsci.2025.110201","DOIUrl":"10.1016/j.ijmecsci.2025.110201","url":null,"abstract":"<div><div>Mechanical-thermal coupling mechanisms in silicone foam (SF) composites play a crucial role in optimizing their performance for aerospace, automotive, and construction applications, where lightweight design and thermal efficiency are essential. This study presents a comprehensive theoretical framework to evaluate the mechanical and thermal properties of SF composites reinforced by carbon fibers (CF) and aluminum particles (Al) under axial pressure. A four-phase composite model is developed to incorporate inclusions, matrix and voids, accounting for morphological changes in the foam structure. The model employs the Mori-Tanaka method to predict the elastoplastic behaviors, while effective-medium approximation is used to determine thermal conductivity. The framework also considers interfacial effects, including interfacial sliding, the Kapitza resistance, and filler-filler contact. Comparisons with experimental data validate the model and reveal that CF/Al/SF composites exhibit superior thermal and mechanical properties, with CFs demonstrating a more pronounced impact. These findings underscore the interplay between mechanical loading, void morphology, and thermal performance, highlighting the importance of tailoring CF/Al ratios and processing conditions to achieve synergistic mechanical-thermal properties of SF-based composites.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"293 ","pages":"Article 110201"},"PeriodicalIF":7.1,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 peridynamic cohesive interface model with apparent friction contact capability","authors":"Heng Zhang ,&nbsp;Dan Huang ,&nbsp;Qinghui Liu ,&nbsp;Kailong Xu ,&nbsp;Pizhong Qiao","doi":"10.1016/j.ijmecsci.2025.110198","DOIUrl":"10.1016/j.ijmecsci.2025.110198","url":null,"abstract":"<div><div>The failure of material interfaces is fatal to bonded and layered structures, which commonly involves interface nonlinear behaviors, interface debonding and material surfaces contact. In this paper, a peridynamic cohesive model is proposed for nonlinear fracture analysis of material interfaces with apparent friction contact capability. First, the bilinear forms of normal and tangential peridynamic cohesive interface bond forces are presented, and the tension-shear and compression-shear mixed mode cases are, respectively, considered. A progressive frictional contact model is developed for the interface cohesive-frictional coupling analysis. Then, three examples (i.e., bonded plate, asymmetric double cantilever beams, and pull-out tests) are investigated to validate the model. In the pull-out test, the friction force appears as the interface debonding happens, increases rapidly with the decreasing cohesion force, and finally reaches the constant sliding friction force when the interface sliding frictional contact starts. The results demonstrate that the proposed peridynamic cohesive interface model can successfully capture the nonlinear deformation, interface debonding, and frictional contact behaviors of material interfaces.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"293 ","pages":"Article 110198"},"PeriodicalIF":7.1,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746307","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}

{"title":"Nonuniform creep-induced alumina scale spallation on FeCrAl coatings","authors":"Bo Yuan ,&nbsp;Harry Hey ,&nbsp;Christopher M. Harvey ,&nbsp;Xiaofeng Guo ,&nbsp;Simon Wang","doi":"10.1016/j.ijmecsci.2025.110168","DOIUrl":"10.1016/j.ijmecsci.2025.110168","url":null,"abstract":"<div><div>Alumina scales play a pivotal role in the failure of thermal barrier coatings, and their cooling rate-dependent spallation remains a major limitation in high-temperature applications. This study presents an analytical model to quantify dynamic creep relaxation in alumina scales (<span><math><mrow><mi>α</mi><mo>−</mo><msub><mrow><mtext>Al</mtext></mrow><mrow><mn>2</mn></mrow></msub><msub><mrow><mtext>O</mtext></mrow><mrow><mn>3</mn></mrow></msub></mrow></math></span>) and its role in blistering and eventual spallation. Particularly, cooling rate-dependent residual stress and stress relaxation kinetics are integrated to characterize the nonuniformity of creep relaxation, elucidating the mechanism of scale detachment at room temperature (Tolpygo and Clarke, 2000). The established model reveals that localized pockets of tensile stress at the scale-metal interface govern crack nucleation, while through-thickness bending from in-plane radial stress gradients leads to blister formation. Additionally, the model introduces spatial stress heterogeneity and energy threshold as the universal criteria for predicting spallation. The pocket of energy concentration model shows strong agreement with experimental observations. This study provides a comprehensive understanding of the interactions among mechanical stress, interface fracture toughness, and scale stability, enhancing predictive capabilities for failures in extreme thermal environments.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"293 ","pages":"Article 110168"},"PeriodicalIF":7.1,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761121","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}

{"title":"Autonomous vibration control of beams utilizing intelligent excitation adaptability","authors":"Shuai Chen ,&nbsp;Yilong Wang ,&nbsp;Qianjing Wu ,&nbsp;Xiaoyun Zhang ,&nbsp;Dengqing Cao ,&nbsp;Biao Wang","doi":"10.1016/j.ijmecsci.2025.110194","DOIUrl":"10.1016/j.ijmecsci.2025.110194","url":null,"abstract":"<div><div>Undesirable mechanical vibrations in beam structures deteriorate the structural integrity, operational reliability, and service lifespan of systems across various engineering and industrial applications. However, most existing vibration methods for beam structures struggle in dynamic and complex environments due to their continuum nature and nonlinear behavior. To achieve autonomous vibration control across the full spectrum, this article proposes an intelligent excitation adaptability (IEA) concept for real-time vibration control of beam structures under frequency-varying excitations. The IEA system is composed of a stiffness-variable electromagnetic appliance, a real-time excitation frequency recognition algorithm, and an autonomous stiffness-switching program. The electromagnetic appliance, arranged in a nesting-type configuration, consists of six-ring permanent magnets (PMs) and six coil windings (CWs). By tuning the magnitude and direction of the current in CWs, a high (HDS) or low (LSD) dynamic stiffness state can be assigned to the IEA system. We develop a recognition algorithm to rapidly and accurately identify the excitation frequency solely based on displacement response signals derived from a nonlinear dynamic model of the beam. Simultaneously, the autonomous stiffness regulation automatically selects either HDS or LSD mode for optimal vibration suppression. The theoretical and experimental results demonstrate that the frequency recognition and stiffness switching processes of the IEA vibration control (IEA-VC) system are fast (min. to 17 ms), accurate, and reliable. Furthermore, the IEA-VC system significantly mitigates resonance (e.g., from 11.48 dB to -1.35 dB) and achieves full-spectrum vibration suppression compared to traditional vibration control approaches.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"293 ","pages":"Article 110194"},"PeriodicalIF":7.1,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761085","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}

{"title":"Flexoelectricity causes surface piezoelectric-like effects in dielectrics","authors":"H. Mohammadi ,&nbsp;F. Greco ,&nbsp;D. Codony ,&nbsp;I. Arias","doi":"10.1016/j.ijmecsci.2025.110162","DOIUrl":"10.1016/j.ijmecsci.2025.110162","url":null,"abstract":"<div><div>In this paper, we study the surface effects that bulk flexoelectric models exhibit in finite samples. We first show that flexoelectric materials do not exhibit electromechanical response under homogeneous loading when the body is infinite. However, when the size of the body is finite, due to the symmetry-breaking nature of surfaces, homogeneous loading (mechanical or electrical) can cause an electromechanical response near the surfaces. We obtain closed-form solutions for finite samples under different electromechanical loading conditions and show that the electromechanical response caused by the bulk flexoelectric effect is reminiscent of surface piezoelectricity, causing boundary layers in certain components of the strains and/or electric fields near the free surfaces.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"293 ","pages":"Article 110162"},"PeriodicalIF":7.1,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739176","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}

{"title":"Dynamic analysis of vibro-impact energy harvester with acoustic black hole","authors":"Peng Wang ,&nbsp;Yunfei Liu ,&nbsp;Runze Zhu ,&nbsp;Lichang Qin ,&nbsp;Jie Deng ,&nbsp;Zhengbao Yang ,&nbsp;Zhaoye Qin ,&nbsp;Fulei Chu","doi":"10.1016/j.ijmecsci.2025.110193","DOIUrl":"10.1016/j.ijmecsci.2025.110193","url":null,"abstract":"<div><div>In order to improve the energy harvesting efficiency of acoustic black hole (ABH) structures under low-frequency excitation, this paper proposed a vibro-impact energy harvester, which can greatly improve the energy output through collision under such conditions. The equations of motion are established by using the Bernoulli-Euler beam theory and Rayleigh-Ritz method. Subsequently, the nonlinear impact force and contact stiffness can be gained by the Hertz contact theory. The Chebyshev polynomials of the first kind are employed to form the mode shape functions. The natural frequency and mode shape are obtained by solving the eigenvalue problem, and the vibration responses under base excitation and collision are calculated by the Duhamel integration and time-stepping iteration method. Finally, the energy output of the system is obtained using the piezoelectric theory. By comparing with the experimental results, the proposed method can accurately solve the vibration response and energy output of the piezoelectric cantilever beam under continuous impact. The advantages and reasons of ABH beam in energy harvesting compared with uniform beam and stepped beam are analyzed by numerical calculation. The results show that the pasting position of piezoelectric sheet, external resistance, impact distance, impact position, excitation frequency and excitation amplitude play important roles on the energy output of the system.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"291 ","pages":"Article 110193"},"PeriodicalIF":7.1,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738496","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}