Acta Mechanica Sinica最新文献

{"title":"Investigation of surface and interface effects of piezoelectric quasicrystal different models with propagation of shear horizontal and anti-plane shear horizontal wave","authors":"Seema \u0000 (,&nbsp;),&nbsp;Abhinav Singhal \u0000 (,&nbsp;)","doi":"10.1007/s10409-024-24389-x","DOIUrl":"10.1007/s10409-024-24389-x","url":null,"abstract":"<div><p>Based on the theoretical representation of piezoelectric quasicrystal, a generalized dynamic model is built to represent the transmission of wave aspects in surface acoustic pulse nano-devices. Surface elasticity, surface piezoelectricity, and surface permittivity help to include the surface effect, which equals additional thin sheets. It is shown that, under certain assumptions, this generalized dynamic model may be simplified to a few classical examples that are appropriate for both macro and nano-scale applications. In the current work, surface piezoelectricity is used to develop a theoretical model for shear horizontal (SH) waves where it contains the surface piezoelectricity theory and a linear spring model to quantitatively and qualitatively explore SH waves in an orthotropic piezoelectric quasicrystal layer overlying an elastic framework (Model I), a piezoelectric quasi-crystal nano substrate, and an orthotropic piezoelectric quasicrystal half-space (Model II). The theoretical model stimulates the numerical results, which establish the critical thickness. As the piezoelectric layer’s thickness gets closer to nanometres, surface energy must be included when analyzing dispersion properties. Furthermore, the effects of surface elasticity and density on wave velocity are investigated individually. The authors establish a parameter, precisely the ratio of the physical modulus along the width direction to along the direction of wave travel. The surface effect’s impact on the general characteristics of piezoelectric structures is seen as a spring force acting on bulk boundaries. Analytical presentation of frequency equations for both symmetric and anti-symmetric waves pertains to the case of an electrical short circuit in Model II. The project aims to analyze SH waves in orthogonal anisotropic, transversely isotropic piezoelectric layered nanostructures, providing a practical mathematical tool for surface effects analysis and adaptability to other wave types, including Rayleigh waves and acoustic surface waves.</p></div>","PeriodicalId":7109,"journal":{"name":"Acta Mechanica Sinica","volume":"41 11","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A two-field mixed formulation with scattered pressure node distribution in element-free Galerkin method for alleviating volumetric locking in hyperelastic materials","authors":"S. Sai Kumar \u0000 (,&nbsp;),&nbsp;Albert Shaji \u0000 (,&nbsp;),&nbsp;Nelson Muthu \u0000 (,&nbsp;)","doi":"10.1007/s10409-024-24446-x","DOIUrl":"10.1007/s10409-024-24446-x","url":null,"abstract":"<div><p>Rubber-like materials that are commonly used in structural applications are modelled using hyperelastic material models. Most of the hyperelastic materials are nearly incompressible, which poses challenges, i.e., volumetric locking during numerical modelling. There exist many formulations in the context of the finite element method, among which the mixed displacement-pressure formulation is robust. However, such a displacement-pressure formulation is less explored in meshfree methods, which mitigates the problem associated with mesh distortion during large deformation. This work addresses this issue of alleviating volumetric locking in the element-free Galerkin method (EFGM), which is one of the popular meshfree methods. A two-field mixed variational formulation using the perturbed Lagrangian approach within the EFGM framework is proposed for modelling nearly incompressible hyperelastic material models, such as Neo-Hookean and Mooney-Rivlin. Taking advantage of the meshless nature of the EFGM, this work introduces a unique approach by randomly distributing pressure nodes across the geometry, following specific guidelines. A wide spectrum of problems involving bending, tension, compression, and contact is solved using two approaches of the proposed displacement-pressure node formulation involving regular and irregular pressure node distribution. It is observed that both approaches give accurate results compared to the reference results, though the latter offers flexibility in the pressure nodal distribution.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":7109,"journal":{"name":"Acta Mechanica Sinica","volume":"41 10","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Atomic lattice-mimic design and optimization of the auxetic metamaterial inspired by the Ti crystal","authors":"Jiahui Zhou \u0000 (,&nbsp;),&nbsp;Yuhang Liu \u0000 (,&nbsp;),&nbsp;Zunyi Deng \u0000 (,&nbsp;),&nbsp;Xingang Jiang \u0000 (,&nbsp;),&nbsp;Wenhao Xiao \u0000 (,&nbsp;),&nbsp;Bo Yu \u0000 (,&nbsp;),&nbsp;Yingzhuo Lun \u0000 (,&nbsp;),&nbsp;Li Meng \u0000 (,&nbsp;),&nbsp;Gang Tang \u0000 (,&nbsp;),&nbsp;Zhong Zhang \u0000 (,&nbsp;),&nbsp;Hongshuai Lei \u0000 (,&nbsp;),&nbsp;Zewei Hou \u0000 (,&nbsp;),&nbsp;Jiawang Hong \u0000 (,&nbsp;)","doi":"10.1007/s10409-024-24488-x","DOIUrl":"10.1007/s10409-024-24488-x","url":null,"abstract":"<div><p>Auxetic metamaterials have attracted much attention due to their outstanding advantages over traditional materials in terms of shear capacity, fracture resistance, and energy absorption. However, there are lack of design inspirations for novel auxetic structures. According to the materials databases of atomic lattice, some natural crystals possess negative Poisson’s ratio (NPR). In this paper, the mechanism of auxeticity in microscale Ti crystal is investigated through density functional theory simulation. Then we propose a macroscopic auxetic metamaterial by mimicking the microscopic atomic lattice structure of the body-centered cubic Ti crystal. The NPR property of the macroscopic metamaterial is verified by theoretical, numerical and experimental methods. The auxeticity keeps effective when scaling up to macroscopic Ti crystal-mimic structure, with the similar deformation mechanism. Furthermore, from the geometric parameter investigation, the geometric parameters have great influence on the Poisson’s ratio and Young’s modulus of the macroscopic metamaterial. Importantly, an optimized structure is obtained, which exhibits 2 times enhancement in auxeticity and 25 times enhancement in normalized Young’s modulus, compared to the original architecture. This work establishes a link between the physical properties at micro-nanoscale and macroscale structures, which provides inspirations for high load-bearing auxetic metamaterials.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":7109,"journal":{"name":"Acta Mechanica Sinica","volume":"41 12","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gravity-driven vertical water tunnel for modeling ventilated cavity flows around axisymmetric slender body under streamwise gravitational effect","authors":"Hua Liu \u0000 (,&nbsp;),&nbsp;Qian Wang \u0000 (,&nbsp;),&nbsp;Chang Shu \u0000 (,&nbsp;),&nbsp;Yao Hong \u0000 (,&nbsp;),&nbsp;Yongliu Fang \u0000 (,&nbsp;),&nbsp;Liang Hao \u0000 (,&nbsp;)","doi":"10.1007/s10409-024-24681-x","DOIUrl":"10.1007/s10409-024-24681-x","url":null,"abstract":"<div><p>The cavitation tunnel with controlled background pressure is a pivotal experimental setup for studying the mechanisms of cavitating flows and hydrodynamic loads on cavitating bodies. Existing recirculating cavitation tunnels predominantly feature horizontal test sections for modeling cavity flows in horizontal incoming flow and vertical gravitational acceleration and fail to meet the requirements for long-duration experiments on ventilated cavity flows. This paper introduces the unique gravity-driven vertical water tunnel (GVWT), facilitating hydrodynamic experiments on axisymmetric slender bodies with ventilated cavities in the streamwise gravitational acceleration. It elaborates high-throughput data processing method for synchronously measured high-speed camera images of cavity forms and pressure distribution from sensor arrays on model surfaces in unsteady long-duration ventilation conditions. For the ventilated cavity flow against an axisymmetric slender body with 60° cone headform at zero angle of attack, the developed partial cavity can be divided into four regimes: The sheet cavity, the combined sheet and cloud cavity, the entire cloud cavity, and the shedding cloud cavity. The mean cavity length and thickness are well-defined by the high-speed images. For the unsteady ventilated cavity due to the re-entrant jet, the Strouhal number based on cavity length and pulsation frequency of the cloud cavity equals 0.276. The mean pressure distribution in the ventilated cavity reveals a difference between the pressure within the sheet cavity and the maximum pressure in the cavity closure, which is influenced by the streamwise gravitational effect. The experimental results demonstrate that GVWT provides a novel experimental approach for understanding the physics of ventilated cavity evolution and bubbly flows under the effect of the streamwise gravitational acceleration.</p></div>","PeriodicalId":7109,"journal":{"name":"Acta Mechanica Sinica","volume":"41 10","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10409-024-24681-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142976526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 modified random sequential absorption algorithm for generating RVE of discontinuous curved fiber reinforced composites","authors":"Wujie Chen \u0000 (,&nbsp;),&nbsp;Kunkun Fu \u0000 (,&nbsp;),&nbsp;Yan Li \u0000 (,&nbsp;)","doi":"10.1007/s10409-024-24434-x","DOIUrl":"10.1007/s10409-024-24434-x","url":null,"abstract":"<div><p>The present study proposes a modified random sequential absorption (RSA) algorithm to generate a representative volume element (RVE) model for predicting the elastic properties of discontinuous curved fiber reinforced composites (DCFRCs) with varying fiber waviness functions and orientations. A small-move method was proposed to modify the traditional RSA algorithm. In comparison with the original RSA algorithm, the generation efficiency of the proposed modified RSA algorithm increased by over 40%, and the achievable maximum fiber volume fraction could reach up to 15% with a fiber aspect ratio of 15. The generated RVE model was utilized in conducting finite element analysis to investigate the effect of fiber waviness and wavy functions on the elastic properties of DCFRCs. Finally, a modified rule-of-mixture was proposed to predict the elastic properties of DCFRCs with various fiber orientations. The results indicated that the elastic properties predicted by the modified rule-of-mixture were in good agreement with those obtained from the RVE model, thereby demonstrating its effectiveness.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":7109,"journal":{"name":"Acta Mechanica Sinica","volume":"41 12","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Low-intensity laser alleviates cartilage degradation in a rat model of knee osteoarthritis by improving the biomechanics of joint muscles and cartilage","authors":"Xinqi Lou \u0000 (,&nbsp;),&nbsp;Hao Zhong \u0000 (,&nbsp;),&nbsp;Xuanze Fan \u0000 (,&nbsp;),&nbsp;Songyuan Wang \u0000 (,&nbsp;),&nbsp;Xiyu Wang \u0000 (,&nbsp;),&nbsp;Lei Ma \u0000 (,&nbsp;),&nbsp;Meng Zhang \u0000 (,&nbsp;),&nbsp;Haoyu Feng \u0000 (,&nbsp;),&nbsp;Pengcui Li \u0000 (,&nbsp;),&nbsp;Yanqin Wang \u0000 (,&nbsp;),&nbsp;Xiaogang Wu \u0000 (,&nbsp;),&nbsp;Xiaochun Wei \u0000 (,&nbsp;),&nbsp;Weiyi Chen \u0000 (,&nbsp;),&nbsp;Yanru Xue \u0000 (,&nbsp;)","doi":"10.1007/s10409-024-23656-x","DOIUrl":"10.1007/s10409-024-23656-x","url":null,"abstract":"<div><p>Abnormal biomechanics plays a central role in the development of knee osteoarthritis (KOA). Low-intensity laser therapy (LILT) is considered an applicable method for the treatment of osteoarthritis. Current research on LILT for the treatment of KOA has focused on the regeneration of articular cartilage. Its biomechanical changes in periarticular tissues have been less well studied, and its role in improving abnormal joint biomechanics is unclear. This study aimed to investigate the role of LILT in improving the biomechanical properties of muscle and cartilage in KOA joints to alleviate cartilage degradation. In this study, a semiconductor laser with a wavelength of 808 nm was used to perform laser interventions in a KOA rat model 3 days per week for 6 weeks. The results of muscle stretch tests showed that LILT could significantly reduce the modulus of elasticity of KOA soleus muscle. Hematoxylin and eosin staining showed that LILT significantly increased the cross-sectional area of the soleus muscle fibers. This suggests that LILT alleviated KOA-induced soleus muscle atrophy and restored the mechanical properties of the muscle tissue. The results of compressive elastic modulus and electrical impedance characterization of cartilage showed that laser intervention significantly increased the elastic modulus and resistivity of cartilage. Results from safranin o-fast green staining and immunohistochemistry showed that LILT significantly increased the synthesis of type II collagen in the cartilage matrix. This may be one of the potential mechanisms by which LILT improves the mechanical properties of cartilage. In addition, immunohistochemistry also showed that LILT reduced the expression of matrix metalloproteinase-13 in cartilage and effectively inhibited the degradation of the cartilage matrix in KOA. In conclusion, the present study demonstrated that LILT alleviated the abnormal biomechanics of KOA joint tissues by improving the mechanical properties of joint muscles and cartilage, thereby slowing down the degradation of KOA cartilage.</p></div>","PeriodicalId":7109,"journal":{"name":"Acta Mechanica Sinica","volume":"41 11","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A torsion quasi-zero stiffness harvester-absorber system","authors":"Qiang Wang \u0000 (,&nbsp;),&nbsp;Jiaxi Zhou \u0000 (,&nbsp;),&nbsp;Kai Wang \u0000 (,&nbsp;),&nbsp;Hongbin Pan \u0000 (,&nbsp;),&nbsp;Jinghang Gao \u0000 (,&nbsp;),&nbsp;Qida Lin \u0000 (,&nbsp;),&nbsp;Dongguo Tan \u0000 (,&nbsp;)","doi":"10.1007/s10409-024-24252-x","DOIUrl":"10.1007/s10409-024-24252-x","url":null,"abstract":"<div><p>This paper proposes a novel idea by integrating a torsion dynamic vibration absorber with a triboelectric energy harvester to realize synchronous torsional vibration suppression and energy harvesting in a rotor system. The most fantastic feature of the proposed torsion harvester-absorber system (HAS) is the quasi-zero-stiffness (QZS) characteristic for suppressing and harvesting low-frequency vibration energy. The QZS characteristic is realized by combining negative stiffness magnet couplings (NSMC) in parallel connection with a pair torsion coil spring. A theoretical model of the NSMC is established based on the equivalent magnetic charge method, and parametric studies are conducted to provide a guideline for the design of the NSMC. Furthermore, the dynamic model of the host oscillator with a torsion QZS HAS is established based on Lagrange’s equation, and then the dynamic amplification factor is obtained using the harmonic balance method. The effects of geometric parameters on both the performances of vibration mitigation and energy harvesting are investigated. Finally, the parameters of the torsion QZS HAS are optimized using <i>H</i>_∞ optimization method and genetic algorithm, respectively. This enables the torsion QZS HAS to effectively suppress low-frequency vibrations of the rotor system while simultaneously harvesting energy over a wide frequency band.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":7109,"journal":{"name":"Acta Mechanica Sinica","volume":"41 9","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On the origin of the back stress in heterogeneous structure: intergranular residual stress and intragranular back stress","authors":"Yong Zhang \u0000 (,&nbsp;),&nbsp;Run-Zi Wang \u0000 (,&nbsp;),&nbsp;Takayuki Hama,&nbsp;Xian-Cheng Zhang \u0000 (,&nbsp;),&nbsp;Yun-Fei Jia \u0000 (,&nbsp;),&nbsp;Shan-Tung Tu \u0000 (,&nbsp;)","doi":"10.1007/s10409-024-24301-x","DOIUrl":"10.1007/s10409-024-24301-x","url":null,"abstract":"<div><p>Back stress has been proven to be the primary mechanism for superior mechanical properties of heterogeneous structures, but its quantitative contribution remains vague. The main purpose of this work is to clarify the contributions of back stress components, i.e., intergranular residual stress and intragranular back stress, to the mechanical properties of heterogeneous structures based on the crystal plasticity theory. The results show that the intragranular back stress is smaller than the intergranular residual stress but contributes significantly to the strain hardening of the heterogeneous bimodal structures. In addition, the contributions of misorientation and grain size to back stress are quantitatively analyzed, and the near-linear relationship between hetero-deformation induced hardening and strain gradient is found. These findings emphasize the essential role of the intragranular back stress induced by strain gradient and provide an in-depth understanding of the elaborate roles of back stress in heterogeneous structures.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":7109,"journal":{"name":"Acta Mechanica Sinica","volume":"41 11","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143571123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efficient uncertainty computation method for solving mechanical dynamic systems with a large-scale of interval parameters","authors":"Jinglai Wu \u0000 (,&nbsp;),&nbsp;Yupeng Duan \u0000 (,&nbsp;),&nbsp;Yunqing Zhang \u0000 (,&nbsp;)","doi":"10.1007/s10409-024-24329-x","DOIUrl":"10.1007/s10409-024-24329-x","url":null,"abstract":"<div><p>This paper proposes a non-intrusive computational method for mechanical dynamic systems involving a large-scale of interval uncertain parameters, aiming to reduce the computational costs and improve accuracy in determining bounds of system response. The screening method is firstly used to reduce the scale of active uncertain parameters. The sequential high-order polynomials surrogate models are then used to approximate the dynamic system’s response at each time step. To reduce the sampling cost of constructing surrogate model, the interaction effect among uncertain parameters is gradually added to the surrogate model by sequentially incorporating samples from a candidate set, which is composed of vertices and inner grid points. Finally, the points that may produce the bounds of the system response at each time step are searched using the surrogate models. The optimization algorithm is used to locate extreme points, which contribute to determining the inner points producing system response bounds. Additionally, all vertices are also checked using the surrogate models. A vehicle nonlinear dynamic model with 72 uncertain parameters is presented to demonstrate the accuracy and efficiency of the proposed uncertain computational method.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":7109,"journal":{"name":"Acta Mechanica Sinica","volume":"41 10","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142976643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermal buckling, vibration and transient response of rotating GNPs-reinforced porous microbeams in thermal environment","authors":"Xu Zhang \u0000 (,&nbsp;),&nbsp;Chaofan Du \u0000 (,&nbsp;),&nbsp;Liang Li \u0000 (,&nbsp;),&nbsp;Jianshi Fang \u0000 (,&nbsp;),&nbsp;Dingguo Zhang \u0000 (,&nbsp;)","doi":"10.1007/s10409-024-24370-x","DOIUrl":"10.1007/s10409-024-24370-x","url":null,"abstract":"<div><p>A comprehensive dynamic model for thermal buckling, elastic vibration and transient response analysis of rotating nano-composite porous metal-matrix microbeams reinforced with graphene nanoplatelets (GNPs) under a uniform thermal gradient is proposed. Various pore distribution patterns are considered together with different GNPs dispersion rules according to the specific functions. The extended rule of mixture and Halpin-Tsai micromechanics model are employed to evaluate the effective material properties of the nanocomposites. Based on the modified couple stress theory and the improved third-order shear deformation theory, the dynamic equations of the rotating microbeam are established by the Lagrange’s equation. The Chebyshev-based Galerkin method is adopted to discretize these equations, which are then solved by the complex modal analysis and Runge-Kutta-Merson method. Convergence study and comparisons with previous literature are conducted for validation of the present method. A parametric study performed analyzes the effects of angular velocity, thickness-to-length scale parameter ratio, porosity coefficient, weight fraction and geometry of GNPs together with distribution patterns of GNPs and pore on the critical buckling temperature rise, fundamental frequency and time-dependent response of the rotating nanocomposite microbeams. The results reveal significant effects of these parameters on the relevant mechanical behaviors, some of which are even contrary to expectations. Therefore, it is necessary to further study this kind of rotating nanocomposite structures for the optimal design.</p></div>","PeriodicalId":7109,"journal":{"name":"Acta Mechanica Sinica","volume":"41 10","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142976642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}