Acta Mechanica Solida Sinica最新文献

{"title":"Meshfree Dynamic Analysis of Functionally Graded Rectangular Plates with Varying Thickness in Supersonic Flow and Thermal Environment","authors":"Jinmi Kim,&nbsp;Kwangil Ri,&nbsp;Songhun Kwak,&nbsp;Unbok Jong","doi":"10.1007/s10338-025-00612-w","DOIUrl":"10.1007/s10338-025-00612-w","url":null,"abstract":"<div><p>In this paper, the free vibration and stationary stochastic response of functionally graded (FG) rectangular plates with varying thickness in supersonic flow and thermal environment are analyzed. Two types of material property variations of FG plates with varying thickness are considered: the variation along the direction perpendicular to the mid-surface and that along the direction perpendicular to the bottom surface. Considering the effects of aerodynamic pressure and thermal load, the governing equations of motion of FG plates with varying thickness are derived using Hamilton’s principle within the framework of first-order shear deformation theory. A meshfree Jacobi radial point interpolation (Jacobi-RPI) shape function is constructed by combining the Jacobi polynomials and radial basis to approximate the displacement components of the plate. The accuracy and reliability of the present approach are confirmed through sufficient comparisons with numerical results from the published literature and the finite element software ABAQUS. Finally, the effects of different parameters on the free vibration and stationary stochastic response of FG plates are investigated.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"39 1","pages":"101 - 120"},"PeriodicalIF":2.7,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145996621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Temperature, Loading Frequency, Stress Amplitude, and Stress Ratio on the Low-Cycle Fatigue Behavior of FeMnSiCrNi Shape Memory Alloys","authors":"Bo Xu,&nbsp;Beihai Huang,&nbsp;Sen Tang,&nbsp;Xiang Xu,&nbsp;Huabei Peng,&nbsp;Chong Wang,&nbsp;Qingyuan Wang","doi":"10.1007/s10338-025-00617-5","DOIUrl":"10.1007/s10338-025-00617-5","url":null,"abstract":"<div><p>FeMnSi-based shape memory alloys (SMAs) have great applied potential to large-scale structures in civil engineering, especially as an aseismic structural material. Low-cycle fatigue performance is one of the most important properties of FeMnSi-based SMA aseismic materials. However, the low-cycle fatigue behavior of such SMAs, especially the stress-controlled low-cycle fatigue behavior (with ratchetting effect), has not been clearly understood. In this work, the low-cycle fatigue behavior of the FeMnSiCrNi SMAs subjected to stress-controlled cyclic tension–compression loads is investigated, and the effects of temperature, loading frequency, stress amplitude, and stress ratio are addressed. By analyzing the cyclic stress–strain response, fatigue fracture surface morphology, dissipation energy, ratchetting strain, and equivalent damping ratio, the mechanisms behind the temperature-, loading frequency-, stress amplitude-, and stress ratio-dependent low-cycle fatigue behavior are discussed. The results show that the plasticity, martensitic transformation, and/or the ratchetting strain caused by their tension–compression asymmetry are the decisive factors affecting the low-cycle fatigue behavior of FeMnSiCrNi SMAs.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"39 2","pages":"133 - 151"},"PeriodicalIF":2.7,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147337794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ballistic Performance of an FRP Helmet-Head System","authors":"Y. J. Liu,&nbsp;S. H. Xin,&nbsp;H. M. Wen","doi":"10.1007/s10338-025-00614-8","DOIUrl":"10.1007/s10338-025-00614-8","url":null,"abstract":"<div><p>The purpose of this paper is to make an assessment on the performance of a fiber reinforced plastic (FRP) helmet-head system subjected to ballistic impact. Firstly, a finite element (FE) model for the human head is developed. Constitutive models for each component of the head are determined and, in particular, strain rate effects of the compact bone of the skull and the hyperelastic property of the scalp are taken into account for the first time. Secondly, an FE model for Kevlar fiber reinforced plastic (KFRP) helmet is constructed based on the personal armor system for ground troops (PASGT) helmet. Recently developed dynamic constitutive models for metals and FRP laminates are employed for full metal jacketed (FMJ) bullet and the KFRP helmet. Finally, both the head and the helmet models are validated against available test data. Furthermore, the effects of various factors such as padding system, impact position, and projectile type on the ballistic performance of the helmet-head system have been systematically investigated with special attention being paid to the severity of head injury. It is found that the performance of the helmet with OA foam is advantageous over that of the helmet with strap-netting in head injury prevention. It is also found that a lower velocity (358 m/s) FMJ bullet poses more threats to head injury than a higher velocity (610 m/s) fragment-simulating projectile for the PASGT helmet-head system.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"39 1","pages":"1 - 23"},"PeriodicalIF":2.7,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145996620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Deep Learning-Based Identification of Cracks Using Ultrasonic Phased-Array Images","authors":"Lijuan Yang,&nbsp;Huan Liu,&nbsp;Desheng Wu,&nbsp;Zhibo Yang,&nbsp;Xuefeng Chen,&nbsp;Shaohua Tian","doi":"10.1007/s10338-024-00576-3","DOIUrl":"10.1007/s10338-024-00576-3","url":null,"abstract":"<div><p>In order to realize the automatic recognition and classification of cracks with different depths, in this study, several deep convolutional neural networks including AlexNet, ResNet, and DenseNet were employed to identify and classify cracks at different depths and in various materials. An analysis process for the automatic classification of crack damage was presented. The image dataset used for model training was obtained from scanning experiments on aluminum and titanium alloy plates using an ultrasonic phased-array flaw detector. All models were trained and validated with the dataset; the proposed models were compared using classification precision and loss values. The results show that the automatic recognition and classification of crack depth can be realized by using the deep learning algorithm to analyze the ultrasonic phased array images, and the classification precision of DenseNet is the highest. The problem that ultrasonic damage identification relies on manual experience is solved.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 5","pages":"803 - 814"},"PeriodicalIF":2.7,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First-Principles Investigation of the Structural, Electronic, Vibrational, Elastic, and Piezoelectric Properties of Bulk InTe","authors":"Mounaim Bencheikh,&nbsp;Zakariae Darhi,&nbsp;Larbi El Farh","doi":"10.1007/s10338-025-00611-x","DOIUrl":"10.1007/s10338-025-00611-x","url":null,"abstract":"<div><p>This study investigates the structural, electronic, vibrational, and mechanical properties of cubic InTe using density functional theory and density functional perturbation theory. The results reveal the metallic character of cubic InTe, as indicated by its electronic structure and density of states. The dynamic stability of the material is confirmed by phonon dispersion analysis, with no imaginary frequencies observed. The Debye temperature (172.276 K) and melting temperature (1092.832 K) suggest excellent thermal resistance. A shear modulus of 18.20 GPa, Poisson’s ratio of 0.343, and Pugh’s ratio (<span>(B/G)</span>) of 2.87 support mechanical stability and indicate ductility. Isotropic dielectric properties, with Born effective charges of −3.768 for both In and Te atoms, highlight potential ferroelectric applications. These findings emphasize InTe’s suitability for electronic and construction applications.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 6","pages":"1067 - 1076"},"PeriodicalIF":2.7,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145750474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Friction Behaviors of Rough Line Contact Using Machine Learning-Assisted Finite Element Analysis","authors":"Shun Zhu,&nbsp;Yanwei Liu,&nbsp;Biao Zhao,&nbsp;Siyuan Zhang","doi":"10.1007/s10338-025-00613-9","DOIUrl":"10.1007/s10338-025-00613-9","url":null,"abstract":"<div><p>Grinding technology is widely applied in the manufacturing and mechanical processing sectors. Different from conventional three-dimensional rough surface friction models, ground metals exhibit a striated surface morphology, which can be simplified as a two-dimensional plane strain friction issue. Due to surface morphology diversity and loading condition complexity, numerical modeling and experimental approaches have difficulty achieving rapid prediction of line-contact surface friction behavior. Therefore, this study innovatively proposes a hybrid physics-data-driven model integrating finite element analysis (FEA) with machine learning (ML), enabling efficient and accurate prediction of line-contact friction behavior on two-dimensional rough surfaces. An extensive friction behavior database was generated through finite element simulations. Based on this dataset, the random forest (RF) algorithm was used to achieve high-precision prediction of the friction coefficient. Furthermore, a comprehensive analysis was performed on the effects of surface roughness, normal load, yield strength, and local friction coefficient on friction behavior. The RF model exhibits excellent performance in predicting friction coefficients and also accurately identifies the most influential features governing friction behavior. Residual analysis further verifies our model’s reliability, as the RF predictions agree with the FEA results, demonstrating remarkable adaptability and accuracy. Feature importance analysis results reveal that the local friction coefficient and normal load are the main factors influencing friction behavior, but the surface roughness and yield strength exhibit a relatively minor influence. The study innovatively identifies the coupling effects of key parameters through contour maps. Namely, the influence of local friction coefficient decreases with increasing normal load but becomes significantly more pronounced with elevated material yield strength. By integrating ML, our proposed model maintains the high accuracy of FEA while capturing the complexity of interfacial responses through data-driven approaches. Our study advances traditional tribological research from “experience-driven” to “data-intelligence-driven,” thus providing novel insights for understanding and predicting complex friction behaviors, as well as for optimizing frictional design in engineering applications.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"39 1","pages":"36 - 51"},"PeriodicalIF":2.7,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145996623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Isogeometric Shell Analysis of Multi-sided CAD Geometries Using Toric Surfaces","authors":"Hanhan Chai,&nbsp;Xuefeng Zhu,&nbsp;Zikang Yang,&nbsp;An Xi,&nbsp;Chunhui Yang,&nbsp;Xiangkui Zhang,&nbsp;Ping Hu","doi":"10.1007/s10338-024-00573-6","DOIUrl":"10.1007/s10338-024-00573-6","url":null,"abstract":"<div><p>To address the challenges associated with multi-sided shells in traditional isogeometric analysis (IGA), this paper introduces a novel isogeometric shell method for trimmed CAD geometries based on toric surfaces and Reissner–Mindlin shell theory. By utilizing toric surface patches, both trimmed and untrimmed elements of the CAD surfaces are represented through a unified geometric framework, ensuring continuity and an accurate geometric description. Toric-Bernstein basis functions are employed to accurately interpolate the geometry and displacement of the trimmed shell. For singularities and corner points on the toric surface, the normal vector is defined as the unit directional vector from the center of curvature to the corresponding control point. Several numerical examples of polygonal shells are presented to evaluate the effectiveness and robustness of the proposed method. This approach significantly simplifies the treatment of trimmed shell IGA and provides a promising solution for simulating complex shell structures with intricate boundaries.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 5","pages":"764 - 775"},"PeriodicalIF":2.7,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surface Elasticity Effects on Rigid Indenter: Thin Elastic Beam Contact Mechanics","authors":"Ting Yang,&nbsp;Liyuan Wang,&nbsp;Dongxia Lei,&nbsp;Zhiying Ou","doi":"10.1007/s10338-025-00608-6","DOIUrl":"10.1007/s10338-025-00608-6","url":null,"abstract":"<div><p>This paper presents a novel surface model based on the Gurtin–Murdoch theory and Kerr-type differential relations, which is established and numerically simulated. By employing the principles of equivalent force and mechanical equilibrium, a differential equation for the contact pressure-deflection relationship between a rigid indenter and an elastic thin beam is derived. The study investigates pressure distribution within the contact area and deformation patterns outside this region. The relationship between indentation parameters is analyzed from two perspectives: clamped and simply-supported boundaries, with a detailed comparison to classical cases. The findings reveal that the normalized contact pressure and load–displacement relationship of elastic thin beams are influenced not only by the half-width ratio and indentation depth but also by the material’s surface elasticity. Similar to classical contact scenarios, an increase in surface elasticity leads to the separation of the indenter from the beam’s center when the contact half-width exceeds a certain threshold (e.g., a ratio of 4 to the beam thickness). This results in a negative normalized contact pressure and the formation of two independent, symmetric contact strips. Notably, the relationship between displacement and contact half-width remains largely unaffected by surface elasticity, aligning with classical indentation contact results. The methodology and outcomes of this research provide a foundation for analyzing the structures and properties of nanostructured materials, offer insights for the design of future nanostructured devices, and present innovative approaches to addressing practical engineering challenges.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 6","pages":"1032 - 1041"},"PeriodicalIF":2.7,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145750472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 Numerical Scheme for Crack Reconstruction in Tubes by Signals of Array Eddy Current Testing Probe","authors":"Wei Guo,&nbsp;Yingsong Zhao,&nbsp;Mengling Yang,&nbsp;Shejuan Xie,&nbsp;Zhenmao Chen","doi":"10.1007/s10338-025-00604-w","DOIUrl":"10.1007/s10338-025-00604-w","url":null,"abstract":"<div><p>In pressurized nuclear power plants, metallic tubes such as steam generator (SG) tubes are subject to complex mechanical and environmental loads that can lead to crack initiation and propagation. Evaluating the structural integrity of SG tubes requires non-destructive assessment of crack size and location. Current inversion schemes can determine crack shape but lack position information, and reconstruction using a single coil has low efficiency. While array probes improve defect detection, reconstruction research based on array signals is challenging due to the complexity of processing multiple sets of signals. This study proposes a simple and effective array reconstruction scheme utilizing signals from two adjacent coils near the crack, enabling simultaneous determination of both crack shape and location through interpolation techniques. Numerical results validate this new crack sizing method, showing accurate reconstruction of both size and location.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 6","pages":"1003 - 1011"},"PeriodicalIF":2.7,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145750467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preface to the “Mechanics of Batteries and Fuel Cells” Special Issue of Acta Mechanica Solida Sinica","authors":"Rong Xu,&nbsp;Zheng Zhong","doi":"10.1007/s10338-025-00610-y","DOIUrl":"10.1007/s10338-025-00610-y","url":null,"abstract":"","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 3","pages":"341 - 343"},"PeriodicalIF":2.7,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}