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Bending of a Saturated Ferromagnetoelastic Plate Under a Local Mechanical Load 饱和铁磁弹性板在局部机械载荷作用下的弯曲
IF 2.2 3区 工程技术
Acta Mechanica Solida Sinica Pub Date : 2023-09-08 DOI: 10.1007/s10338-023-00425-9
Jiashi Yang, Xiaoshan Cao, Wenhui Xu
{"title":"Bending of a Saturated Ferromagnetoelastic Plate Under a Local Mechanical Load","authors":"Jiashi Yang,&nbsp;Xiaoshan Cao,&nbsp;Wenhui Xu","doi":"10.1007/s10338-023-00425-9","DOIUrl":"10.1007/s10338-023-00425-9","url":null,"abstract":"<div><p>We study the bending of a magnetically saturated ferromagnetoelastic plate. The plate is rectangular and simply-supported along its edges. It is under a local distribution of normal mechanical load on its top surface, simulating a mechanical probe or manipulation of the magnetization field. The three-dimensional equations of saturated ferromagnetoelasticity for small fields superposed on finite biasing fields due to spontaneous magnetization are used. The plate is effectively piezomagnetic under the biasing fields. A trigonometric series solution is obtained. The perturbation of the magnetization field by the mechanical load is calculated and examined. It is found that the magnetization is sensitive to the mechanical load, particularly near the loading area. The perturbation of the magnetization is found to be associated with the transverse shear stresses in bending.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49004661","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}
引用次数: 0
Size Effect on the Fracture Strength and Toughness of Nano-cracked CoSb3: A Molecular Dynamics Study 尺寸对纳米裂纹CoSb3断裂强度和韧性的影响：分子动力学研究
IF 2.2 3区 工程技术
Acta Mechanica Solida Sinica Pub Date : 2023-08-28 DOI: 10.1007/s10338-023-00419-7
Xuqiu Yang, Liju Cai, Pengcheng Zhai
{"title":"Size Effect on the Fracture Strength and Toughness of Nano-cracked CoSb3: A Molecular Dynamics Study","authors":"Xuqiu Yang,&nbsp;Liju Cai,&nbsp;Pengcheng Zhai","doi":"10.1007/s10338-023-00419-7","DOIUrl":"10.1007/s10338-023-00419-7","url":null,"abstract":"<div><p>Molecular dynamics simulations are implemented to study the mechanical fracture of CoSb<sub>3</sub> with penetrated nanocracks under the mode-I stress. The crack surface and crack front direction are (100) and [001], respectively. It is found that, at a fixed initial crack length, the fracture strength varies with the sample size, but the calculated value of fracture toughness <i>K</i><sub>IC</sub>, by employing the classical formula of linear elastic fracture mechanics, maintains constant. When the crack is short in length relative to the sample, the variation of the fracture strength with the initial crack length is well fitted mathematically, and the extrapolation shows rationality even up to the macroscale. More general analyses reveal that, the fracture toughness increases monotonically with increasing the initial crack length until reaching the limit, and the increment is particularly noticeable below 36 nm. Furthermore, different atomic configurations at the crack tip are considered, which show an evident influence on the strength of nano-cracked CoSb<sub>3</sub>.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49305010","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}
引用次数: 0
Sound Reduction Control in Acoustic Enclosure with Air Ventilation 通风隔声罩的消声控制
IF 2.2 3区 工程技术
Acta Mechanica Solida Sinica Pub Date : 2023-08-28 DOI: 10.1007/s10338-023-00423-x
Mengyi Liu, Xiaoming Zhou
{"title":"Sound Reduction Control in Acoustic Enclosure with Air Ventilation","authors":"Mengyi Liu,&nbsp;Xiaoming Zhou","doi":"10.1007/s10338-023-00423-x","DOIUrl":"10.1007/s10338-023-00423-x","url":null,"abstract":"<div><p>An acoustic enclosure system with both interior sound reduction and air ventilation is designed and demonstrated. The system consists of a rectangular enclosed space coupled with ventilated metamaterials and microperforated panels (MPPs). By modeling the ventilated metamaterial as an impedance boundary condition, an analytic model is developed to characterize the frequency response of interior acoustic fields and evaluate the sound reduction performance of MPP structures. Numerical simulations are conducted to validate the accuracy of the theoretical model. It is found that the resonance response of the enclosure system can be suppressed by proper arrangement of the MPPs. Even with open area for airflow, the system still possesses good sound isolation originating from the low-transmission behavior of the ventilated metamaterial. The proposed model system may find potential applications in noise control engineering.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44121385","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}
引用次数: 0
Accelerating Optimization Design of Bio-inspired Interlocking Structures with Machine Learning 用机器学习加速仿生联锁结构的优化设计
IF 2.2 3区 工程技术
Acta Mechanica Solida Sinica Pub Date : 2023-08-23 DOI: 10.1007/s10338-023-00420-0
Zhongqiu Ding, Hong Xiao, Yugang Duan, Ben Wang
{"title":"Accelerating Optimization Design of Bio-inspired Interlocking Structures with Machine Learning","authors":"Zhongqiu Ding,&nbsp;Hong Xiao,&nbsp;Yugang Duan,&nbsp;Ben Wang","doi":"10.1007/s10338-023-00420-0","DOIUrl":"10.1007/s10338-023-00420-0","url":null,"abstract":"<div><p>Structural connections between components are often weak areas in engineering applications. In nature, many biological materials with remarkable mechanical performance possess flexible and creative sutures. In this work, we propose a novel bio-inspired interlocking tab considering both the geometry of the tab head and neck, and demonstrate a new approach to optimize the bio-inspired interlocking structures based on machine learning. Artificial neural networks for different optimization objectives are developed and trained using a database of thousands of interlocking structures generated through finite element analysis. Results show that the proposed method is able to achieve accurate prediction of the mechanical response of any given interlocking tab. The optimized designs with different optimization objectives, such as strength, stiffness, and toughness, are obtained efficiently and precisely. The optimum design predicted by machine learning is approximately 7.98 times stronger and 2.98 times tougher than the best design in the training set, which are validated through additive manufacturing and experimental testing. The machine learning-based optimization approach developed here can aid in the exploration of the intricate mechanism behind biological materials and the discovery of new material designs boasting orders of magnitude increase in computational efficacy over conventional methods.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42088146","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}
引用次数: 1
Analysis and Prediction of Hole Penetrated in Thin Plates under Hypervelocity Impacts of Cylindrical Projectiles 圆柱形弹丸超高速冲击下薄板穿孔的分析与预测
IF 2.2 3区 工程技术
Acta Mechanica Solida Sinica Pub Date : 2023-08-16 DOI: 10.1007/s10338-023-00413-z
Na Feng, Mingrui Li, Kun Ma, Chunlin Chen, Lixin Yin, Gang Zhou, Chengwen Tan
{"title":"Analysis and Prediction of Hole Penetrated in Thin Plates under Hypervelocity Impacts of Cylindrical Projectiles","authors":"Na Feng,&nbsp;Mingrui Li,&nbsp;Kun Ma,&nbsp;Chunlin Chen,&nbsp;Lixin Yin,&nbsp;Gang Zhou,&nbsp;Chengwen Tan","doi":"10.1007/s10338-023-00413-z","DOIUrl":"10.1007/s10338-023-00413-z","url":null,"abstract":"<div><p>The hole penetrated in thin metallic plates due to hypervelocity impacts of cylindrical projectiles was analyzed by experimental method. The projectile caused a hole-expanding effect when penetrating the target plate because of dynamic shear failure and extrusion. A new empirical model was presented to predict the perforation diameter in thin plates impacted by high-velocity cylindrical projectiles. The fitting coefficients resulted in a root-mean-square of 0.0641 and a correlation coefficient of 0.991. The errors between the predicted and the experimental values were less than 7.251%, and less than 4.705% for 93.333% cases of the dataset. The accuracy of the proposed model is much higher than that of Hill’s model. Compared with historical equations, the new model is more accurate and can well describe the variations of different parameters with the normalized penetrated hole. The model takes into account the strength of materials, which contributes to the excellent results. This paper could provide important theoretical support for the analysis of the perforation process and its mechanism.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47925423","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}
引用次数: 0
Energy Absorption Performance of Bionic Multi-cell Tubes Inspired by Shrimp chela 虾螯合仿生多细胞管的能量吸收性能
IF 2.2 3区 工程技术
Acta Mechanica Solida Sinica Pub Date : 2023-08-10 DOI: 10.1007/s10338-023-00414-y
Rui Liang, Na Liu, Xiang Liu, Tao Wei, Lirong Mo, Huanchao Huang, Christophe Bastien
{"title":"Energy Absorption Performance of Bionic Multi-cell Tubes Inspired by Shrimp chela","authors":"Rui Liang,&nbsp;Na Liu,&nbsp;Xiang Liu,&nbsp;Tao Wei,&nbsp;Lirong Mo,&nbsp;Huanchao Huang,&nbsp;Christophe Bastien","doi":"10.1007/s10338-023-00414-y","DOIUrl":"10.1007/s10338-023-00414-y","url":null,"abstract":"<div><p>This research introduced the design, analysis and optimization of bionic shrimp chela multi-cell tubes (BSCMTs) in bending by embedding an arthropod's microstructure inside a thin-walled square structure. A three-point impact bending finite element model was, in the first instance, correlated with physical tests and then modified to assess the energy absorption performance of bionic multi-cell tubes considering initial peak force, specific energy absorption and mean crushing force. Following a complex proportional assessment (COPRAS) approach and optimization phases, results demonstrated that the BSCMT with a W-shape section had the best energy absorption characteristics and should be considered in future as a possible contender for vehicle B-pillar structures that are subjected to bending and require excellent energy absorption properties to protect the occupants in high-speed impact collisions.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10338-023-00414-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48731895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Semi-analytical Modeling of the Influence of Macro Bending Effects on Micro Contact-Inhomogeneity Problems 宏观弯曲效应对微接触不均匀性影响的半解析建模
IF 2.2 3区 工程技术
Acta Mechanica Solida Sinica Pub Date : 2023-08-10 DOI: 10.1007/s10338-023-00421-z
Jinran Li, Linlin Sun, Ning Zhao, Pu Li
{"title":"Semi-analytical Modeling of the Influence of Macro Bending Effects on Micro Contact-Inhomogeneity Problems","authors":"Jinran Li,&nbsp;Linlin Sun,&nbsp;Ning Zhao,&nbsp;Pu Li","doi":"10.1007/s10338-023-00421-z","DOIUrl":"10.1007/s10338-023-00421-z","url":null,"abstract":"<div><p>This study examines the effects of macroscopic bending and microscopic contact loading in inhomogeneous materials using a semi-analytical model based on Eshelby's equivalent inclusion method. The model accounts for bending effects through the beam theory, with bending stress included in the Eshelby's equivalent inclusion equations. The macroscopic displacement resulting from bending effects is incorporated into the microscopic contact solver, and the final displacement is determined using the conjugate gradient method in an iterative solution. Computational efficiency can be improved by incorporating the discrete convolution and fast Fourier transform. The core scheme is validated using the finite element method, yielding accurate and efficient results for bending-contact problems in inhomogeneous materials. Simulations reveal the interplay between bending, contact loading, and inhomogeneity, as stress around the inhomogeneity alters and the stress concentration area expands under increasing bending moments. Conversely, low-magnitude negative bending moments reduce both contact pressure and stress around the inhomogeneity. The position where inhomogeneities are least affected shifts from the neutral surface depending on the coupling effect. The model provides a valuable bridge for connecting the macroscopic bending effect and microscale contact-inhomogeneity problems by visualizing stress fields and assessing pressure distributions.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45423145","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}
引用次数: 0
Hybrid Finite Element Method Based on Polygon-Quadtree Meshes for Heat Transfer and Thermal Elastic Analysis 基于多边形-四叉树网格的混合有限元传热与热弹性分析
IF 2.2 3区 工程技术
Acta Mechanica Solida Sinica Pub Date : 2023-08-03 DOI: 10.1007/s10338-023-00412-0
Lihui Wang, Rui Zhang, Ran Guo, Jiangbo Tao
{"title":"Hybrid Finite Element Method Based on Polygon-Quadtree Meshes for Heat Transfer and Thermal Elastic Analysis","authors":"Lihui Wang,&nbsp;Rui Zhang,&nbsp;Ran Guo,&nbsp;Jiangbo Tao","doi":"10.1007/s10338-023-00412-0","DOIUrl":"10.1007/s10338-023-00412-0","url":null,"abstract":"<div><p>A steady-state thermal hybrid element model is proposed to calculate particle-reinforced composites divided by an improved quadtree mesh. The functional of hybrid flux finite element method (HF-FEM) is constructed using the weighted residual method. This functional independently assumes a heat flux field in the cell domain and a temperature field along cell boundaries. The construction of a universal heat flux function is put forward, which is approximated by a complete polynomial, and the temperature at the cell boundary is obtained by linear interpolation. Also, the hybrid stress finite element method (HS-FEM) is constructed to solve the thermal stress. In this paper, an improved quadtree grid that can accurately describe the shape of elliptical inclusions is built. By comparing several numerical examples with the traditional FEM, it is demonstrated that the hybrid element of the thermal analysis proposed in this paper is practical.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48087784","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}
引用次数: 0
Influence of Dislocation Pile-Up on Main Crack Propagation in Nanocrystals in the Hydrogen Environment 位错堆积对氢环境下纳米晶主裂纹扩展的影响
IF 2.2 3区 工程技术
Acta Mechanica Solida Sinica Pub Date : 2023-07-31 DOI: 10.1007/s10338-023-00417-9
Jiding Zhang, Yue Sheng, Hongda Yang, Jinbo Wu, Xiaoyu Jiang
{"title":"Influence of Dislocation Pile-Up on Main Crack Propagation in Nanocrystals in the Hydrogen Environment","authors":"Jiding Zhang,&nbsp;Yue Sheng,&nbsp;Hongda Yang,&nbsp;Jinbo Wu,&nbsp;Xiaoyu Jiang","doi":"10.1007/s10338-023-00417-9","DOIUrl":"10.1007/s10338-023-00417-9","url":null,"abstract":"<div><p>The influence of material micro-defects on the main crack growth under pure shear loading is studied theoretically. The mechanism behind the initiation of micro-cracks and crack propagation induced by dislocation accumulation near the grain boundary (GB) is mainly considered, and the influence of dislocation accumulation on the main crack propagation is analyzed. The research results reveal that the initiation of micro-cracks near the GB is prior to the propagation of the main crack. In a hydrogen environment, hydrogen can cause serious embrittlement of the crack tip and promote crack growth. The energy release rate in the main crack growth direction in the dislocation emission direction is the highest. Therefore, the main crack will eventually merge with the micro-cracks at the GB along the direction of the slip band, resulting in fracture of the crystal material. The research presented in this paper provides some new information for the first stage of crack propagation and contributes to the analysis of the mechanism of crystal metal fracture.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47592591","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}
引用次数: 0
Controllable Delamination of CNT-Reinforced Carbon Fiber Films by Harnessing Mechanical and Topological Characteristics of the Composites 利用复合材料的力学和拓扑特性控制CNT增强碳纤维薄膜的分层
IF 2.2 3区 工程技术
Acta Mechanica Solida Sinica Pub Date : 2023-07-31 DOI: 10.1007/s10338-023-00418-8
Yu Xie, Zhuxuan Wei, Weicong Zhang, Ji Lin, Jin Qian
{"title":"Controllable Delamination of CNT-Reinforced Carbon Fiber Films by Harnessing Mechanical and Topological Characteristics of the Composites","authors":"Yu Xie,&nbsp;Zhuxuan Wei,&nbsp;Weicong Zhang,&nbsp;Ji Lin,&nbsp;Jin Qian","doi":"10.1007/s10338-023-00418-8","DOIUrl":"10.1007/s10338-023-00418-8","url":null,"abstract":"<div><p>Carbon nanotubes (CNTs) offer a remarkable reinforcement effect for the interlaminar toughness of laminated films, and optimizing the delamination of films through their toughening mechanism is of particular interest. Herein, we propose a theoretical model that combines the spatial evolution of aligned CNTs to describe the mode I fracture between opposing carbon fiber films. Our theoretical predictions quantitatively agree well with previous tests, and the influence of interfacial energy and modulus of films on toughness enhancement is considered. Our findings have demonstrated that aligned CNTs play a crucial role in enhancing delamination resistance, with the performance being highly sensitive to their volume fraction, mechanical properties, and geometric characteristics. We optimized interlaminar toughness by selecting appropriate strength and aspect ratio of CNTs based on two competitive failure modes. This work presents new concept for the topological design of composite laminates, bridging the properties of microfibers and macrostructures and ultimately achieving greater strength and toughness.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45318160","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}
引用次数: 0
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