European Journal of Mechanics A-Solids最新文献

{"title":"An energy-saving method based on dynamic vibration absorbers for eccentrically stiffened plates under non-ideal induction motor excitation","authors":"Ziyu Hao,&nbsp;Xiangxi Kong,&nbsp;Wenjie Li,&nbsp;Qi Xu,&nbsp;Jingqiao Wang","doi":"10.1016/j.euromechsol.2025.105910","DOIUrl":"10.1016/j.euromechsol.2025.105910","url":null,"abstract":"<div><div>This paper develops an energy-saving control approach incorporating dynamic vibration absorbers, with the eccentric stiffened plate system under induction motor excitation serving as an illustrative example to demonstrate its effectiveness in overcoming resonance passage difficulties under non-ideal excitation. A unified coordinate system is adopted, where stiffener responses are expressed by the global plate displacement field. This avoids extra degrees of freedom, ensures compatibility, and enables accurate results with few truncated terms. An efficient model for arbitrary boundaries is then developed via the improved Fourier series and virtual boundary spring techniques. Based on this model, a non-ideal induction motor is introduced as the excitation source, and an electromechanical coupled system is constructed. The stability of the system is then analyzed using the perturbation method. Numerical simulation results validate the feasibility and accuracy of the proposed analytical method. The results indicate that, under non-ideal motor excitation, the system exhibits a typical Sommerfeld effect. To address this phenomenon, the proposed vibration absorption method effectively suppresses the resonance response. Compared to conventional approaches that rely on high-power motors, the proposed method reduces energy consumption by approximately 30 %. This study provides theoretical support for the modeling of stiffened plate structures and offers a practical solution for reducing dependence on high-power motors and achieving energy-efficient operation in engineering applications.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"116 ","pages":"Article 105910"},"PeriodicalIF":4.2,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145266320","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":"Data-driven optimization design of a novel combined metamaterial for robotic grinding vibration control","authors":"Yutong Jin ,&nbsp;Hua Yang ,&nbsp;Wolfgang H. Müller ,&nbsp;Jingkun Guo ,&nbsp;Ziyao Cui ,&nbsp;Shijie Dai","doi":"10.1016/j.euromechsol.2025.105904","DOIUrl":"10.1016/j.euromechsol.2025.105904","url":null,"abstract":"<div><div>In order to suppress low-frequency vibration induced by low structural stiffness and rapid point-to-point motion in robotic grinding, a novel combined mechanical metamaterial is proposed. Two cosine beams are integrated into a previously developed lattice and are aligned along the load direction, enabling near-zero load conditions within geometric constraints. A data-driven bi-objective optimization algorithm is applied, utilizing adaptive constraints to maximize effective Young's modulus and to tailor the band gap. A two-output machine learning model is trained to separately predict the upper and lower boundaries of the band gap. To address the discontinuity caused by band gap jumps, the model incorporates a jump feature and a target-weighted loss, thereby achieving stable and accurate predictions. Compared with the original lattice, the optimized metamaterial is shown to exhibit a 2.5-fold increase in effective Young's modulus (from 150.34 Pa to 374.38 Pa), a reduction in the lower bound of the first band gap (from 18.33 Hz to 9.47 Hz), and an expansion of both band gap range and count. Experimental validation is conducted, demonstrating an approximately double reduction in minimum vibration transmission values, thereby confirming the effectiveness of the design. The provided efficient and accurate data-driven framework is potentially applicable to the simultaneous optimization of two properties in metamaterials.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"116 ","pages":"Article 105904"},"PeriodicalIF":4.2,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145266319","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":"Effect of polarization on the vibrational behavior of the soft dielectric elastomer tube","authors":"Ahmad Almamo ,&nbsp;Renwei Mao ,&nbsp;Mingtang Wei ,&nbsp;Yipin Su","doi":"10.1016/j.euromechsol.2025.105886","DOIUrl":"10.1016/j.euromechsol.2025.105886","url":null,"abstract":"<div><div>This study delves into the influence of polarization on the axisymmetric vibration and stability of a soft dielectric elastomer tube through electroelasticity and linearized incremental theories. The tube experiences an internal electric field generated by compliant electrodes mounted on the tube surfaces and an applied external electric field induced by free charges of ions interacting with the electrodes. In addition, the tube undergoes radial pressure at its inner surface. The two distinguishing electric fields are easily described by a unified polarization field. Thus, this approach allows us to theoretically analyze the impact of their interaction, represented by the polarization field, on the vibrational behavior of the dielectric elastomer tube. Furthermore, we illustrate the role of prestretch, particularly in the circumferential direction, in actively controlling the vibrational frequency and axisymmetric stability of the soft dielectric tube under this interaction effect.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"116 ","pages":"Article 105886"},"PeriodicalIF":4.2,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267101","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 novel geometrically-reconstructed primitive-like lattice for additive manufacturing: Shape-Controlled elasticity and deformation mechanisms","authors":"Shangkun Jin ,&nbsp;Tao Zhang ,&nbsp;Guang Fu ,&nbsp;Zhengwen Zhang ,&nbsp;Hang You","doi":"10.1016/j.euromechsol.2025.105901","DOIUrl":"10.1016/j.euromechsol.2025.105901","url":null,"abstract":"<div><div>To overcome the efficiency limitations in additive manufacturing and structural analysis caused by the excessive mesh complexity of curved lattice structures, a novel geometrically-reconstructed Primitive-like lattice is proposed. This sheet-based parametric lattice integrates geometric simplification and surface planarization, significantly reducing STL file size and enhancing slicing efficiency. The mechanical behavior of the structure—including equivalent elastic modulus, shear modulus, elastic anisotropy, and deformation mechanisms—was systematically investigated through homogenization theory, finite element simulations, and quasi-static compression tests. Results show that shape parameters, compared to volume fraction, offer superior tunability of mechanical properties and enable elastic isotropy across a wide design space. Furthermore, the structure exhibits stable energy absorption under both uniaxial and shear loading, attributed to its uniform sheet thickness that suppresses stress drops from local lattice instabilities. Combining high specific stiffness with improved manufacturability, the proposed lattice offers a promising solution for lightweight, large-scale applications in aerospace and structural engineering.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"116 ","pages":"Article 105901"},"PeriodicalIF":4.2,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267103","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":"Thermo-magnetic effects on nonlinear resonance and dynamic stability of parametrically excited boron nitride nanotubes","authors":"Lotfi Ben Said ,&nbsp;Nashmi H. Alrasheedi ,&nbsp;Ali B.M. Ali ,&nbsp;Mohamed Shaban ,&nbsp;Abdullah Abed Hussein ,&nbsp;Husam Rajab ,&nbsp;Wajdi Rajhi ,&nbsp;Khalil Hajlaoui","doi":"10.1016/j.euromechsol.2025.105902","DOIUrl":"10.1016/j.euromechsol.2025.105902","url":null,"abstract":"<div><div>This study investigates the nonlocal nonlinear parametric resonance response of a single-walled boron nitride nanotube (SWBNNT) subjected to parametric excitation incorporating geometric nonlinearity, viscoelastic damping, and the coupled influence of axial thermal and magnetic fields. An analytical solution is developed using the method of multiple scales (MMS) to investigate the influence of parametric excitation amplitude, magnetic field strength, length-to-diameter ratio, viscoelastic damping, mode number and different standard boundary conditions on primary resonance stability. Results reveal that the bifurcation gaps increase with increasing parametric excitation but narrow with greater magnetic field intensity and length-to-diameter ratio. Additionally, the principal parametric resonance response displays a prominent backwards-jumping phenomenon, strongly influenced by excitation amplitude and structural geometry.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"116 ","pages":"Article 105902"},"PeriodicalIF":4.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220664","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":"Void nucleation in heterogeneous materials induced by particle-matrix debonding in polycrystalline matrix","authors":"Yingjie Wang ,&nbsp;Minsheng Huang ,&nbsp;Zhenhuan Li","doi":"10.1016/j.euromechsol.2025.105899","DOIUrl":"10.1016/j.euromechsol.2025.105899","url":null,"abstract":"<div><div>Void nucleation represents the initial stage of void evolution and plays a pivotal role in subsequent damage progression in ductile materials. This study focuses specifically on void nucleation resulting from the debonding of spherical particles from a heterogeneous polycrystalline matrix. In contrast to most previous models that assume a homogeneous matrix surrounding the particle, this study introduces a more realistic representation by modeling the matrix as an assembly of grains with randomly assigned morphologies and crystallographic orientations. The crystal plasticity (CP) model and the cohesive zone model (CZM) are employed to simulate the plastic deformation of grains and the debonding behavior at the particle–matrix interfaces, respectively. Representative volume elements (RVEs), each containing multiple grains and a single spherical particle, are used in the simulations. Three particle volume fractions and two particle positions (intragranular and intergranular) are considered. For each combination, 200 RVEs with randomized grain morphologies and orientations are generated to investigate the influence of microstructural variability on the critical stress and equivalent strain required for void nucleation under various triaxial stress states. A comprehensive dataset was generated through extensive finite element simulations, followed by statistical analysis. Based on the results, two bivariate normal distribution models were developed, each employing a specific pair of variables—critical combination stress and equivalent strain—to characterize void nucleation behavior. Compared to previous homogenized void nucleation models, the proposed models account for grain morphology and orientation effects, thereby more accurately capturing the stochastic nature of void nucleation in heterogeneous polycrystalline materials under different triaxial stress conditions and particle volume fractions. These models have also been applied in macro-level finite element (FE) simulations to characterize the stochastic behavior of void nucleation in such materials.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"116 ","pages":"Article 105899"},"PeriodicalIF":4.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220661","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":"Quasi-static behavior and energy absorption of bidirectional re-entrant cross-star honeycomb with multi-step deformation","authors":"Zaisheng Zhao ,&nbsp;Xiaopeng Wang ,&nbsp;Sen Huang","doi":"10.1016/j.euromechsol.2025.105903","DOIUrl":"10.1016/j.euromechsol.2025.105903","url":null,"abstract":"<div><div>Auxetic honeycombs with multi-step deformation are critical for energy absorption applications, yet conventional designs often suffer from single-stage stress plateaus and unstable collapse modes. To address these limitations, this study proposes a novel bidirectional re-entrant cross-star honeycomb (BRSH) through a deformation coordination strategy that integrates reinforcement ribs and internal cross-star embedding. The BRSH replaces concave corners of traditional star-shaped units with linear ribs, introduces transverse inclined ribs, and embeds a cross-star substructure to enable synergistic multi-step deformation. Quasi-static compression tests and finite element (FE) simulations demonstrate that the BRSH exhibits three distinct stress plateaus without initial peak stress, achieving a more than 90 % enhancement in specific energy absorption (SEA) compared to other conventional auxetic honeycombs. Theoretical models based on plastic hinge energy dissipation accurately predict the plateau stresses, revealing a 362.6 % increase in the third plateau stress over the first stage. Furthermore, parametric studies highlight the tunability of the BRSH: adjusting geometric parameters (e.g., <em>β, γ, l</em>_<em>4</em>) allows switching between one-, two-, or three-step deformation modes, while the Poisson's ratio can be tailored from −0.09 to −0.80. The novelty of this work lies in the innovative structural design of the metamaterial and its resulting distinctive mechanical response. And these results establish the BRSH as a high-performance energy absorber with design flexibility, offering new avenues for lightweight and multi-level protective structures in aerospace and automotive engineering.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"116 ","pages":"Article 105903"},"PeriodicalIF":4.2,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267102","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":"Directional modeling concept for large strain metal plasticity","authors":"A.V. Shutov,&nbsp;O.D. Vardosanidze","doi":"10.1016/j.euromechsol.2025.105897","DOIUrl":"10.1016/j.euromechsol.2025.105897","url":null,"abstract":"<div><div>This paper improves a modeling tool called “concept of representative directions”. Employing this approach, experienced and novice users can construct advanced nonlinear models of inelastic material behavior in a straightforward way. Unfortunately, the classical version of this concept lacks w-invariance, which effectively prevents the applicability to finite strain metal plasticity. To overcome this limitation, we introduce two enhanced versions of the concept that ensure w-invariance. The resulting material models are objective, with one approach also being thermodynamically consistent. These advancements are not purely theoretical: numerical tests demonstrate that the new formulations significantly improve the accuracy of modeling actual material behavior in the finite strain range. While the classical concept induces parasitic hardening, our advanced w-invariant models eliminate this inconsistency. Furthermore, the new approach has been implemented in the commercial FEM code MSC.MARC, and its practical utility is showcased through an initial boundary value problem. The generalizations to other material nonlinearities like metal creep and ratcheting are straightforward.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"116 ","pages":"Article 105897"},"PeriodicalIF":4.2,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220666","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":"Physics-Informed failure prediction in disordered systems sharing a common resource","authors":"Gokul V.,&nbsp;Navin Singh","doi":"10.1016/j.euromechsol.2025.105894","DOIUrl":"10.1016/j.euromechsol.2025.105894","url":null,"abstract":"<div><div>We study the progressive degradation of disordered systems that experience multiple intermediate failures and equilibrations before collapsing while sharing a common resource. The system is modelled using a generalized Fibre Bundle framework, wherein individual elements fail upon exceeding their local thresholds, and their load is redistributed among surviving elements according to a prescribed load-sharing scheme. We employ two classes of disorder distributions: the two-parameter Weibull and a more flexible custom distribution. To predict the ultimate tensile strength (UTS) and critical burst size which characterize system failure in this model—we employ Artificial Neural Networks (ANNs) informed by theoretical expressions rooted in statistical physics. Our investigation shows that the predictive performance of ANNs is significantly improved (from 83% to 99%) by our Physics informed theoretical predictors. This approach reduces the need for large-scale simulations and is a more efficient way to estimate the reliability of such complex disordered systems.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"116 ","pages":"Article 105894"},"PeriodicalIF":4.2,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267108","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":"Study on residual stress of 1J22 alloy in longitudinal-torsional ultrasonic milling: modeling and multi-scale simulation","authors":"Bingyang Zhang,&nbsp;Guofu Gao,&nbsp;Ruikang Li,&nbsp;Haoxiang Wang,&nbsp;Wenbin Ma,&nbsp;Daohui Xiang,&nbsp;Junjin Ma","doi":"10.1016/j.euromechsol.2025.105898","DOIUrl":"10.1016/j.euromechsol.2025.105898","url":null,"abstract":"<div><div>Surface microcracks and residual tensile stresses usually occur on the machined 1J22 alloy surface due to its inherent brittleness. Longitudinal torsional ultrasonic-assisted milling (LTUM) is an effective technique for achieving high-precision, low-stress machining of brittle metallic materials. To elucidate the mechanistic influence of LTUM on residual stress in 1J22 alloy, a residual stress analytical model was developed that considers the thermo-mechanical coupling. The surface residual stress of the 1J22 alloy was investigated through a multi-scale approach that integrates molecular dynamics simulation, finite element modeling, and LTUM experiment. The findings indicate that the theoretical model aligns closely with empirical measurements, with an average deviation of 2.13 %. The dislocation line length of LTUM is reduced by 16.6 % at most, which reduces dislocation concentration and reduces crack damage. In the LTUM experiment, the average cutting force and cutting temperature decrease by 11 % and 8 %, respectively. The residual compressive stress increases by 10.7 %. Ultrasonic energy reduces stress concentration by activating dislocation migration and inhibiting fracture on the alloy's surface. This paper provides valuable insights into the formation mechanisms of residual stress during the cutting process of 1J22 alloy, facilitating the advancement of high-accuracy engineering applications for such materials.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"116 ","pages":"Article 105898"},"PeriodicalIF":4.2,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220659","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}