Acta Mechanica Solida Sinica最新文献_第5页

The Scanning Secondary Moiré Method with Atomic-Level Resolution and Large Micrometer-Scale Field of View 具有原子级分辨率和大微米视场的扫描二次成像方法

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2025-01-02 DOI: 10.1007/s10338-024-00525-0

Yao Zhao, Yueyue Xu, Zhanwei Liu, Jiangfan Zhou, Han Liu, Jianxin Nie, Jinzhao Zhao

{"title":"The Scanning Secondary Moiré Method with Atomic-Level Resolution and Large Micrometer-Scale Field of View","authors":"Yao Zhao, Yueyue Xu, Zhanwei Liu, Jiangfan Zhou, Han Liu, Jianxin Nie, Jinzhao Zhao","doi":"10.1007/s10338-024-00525-0","DOIUrl":"10.1007/s10338-024-00525-0","url":null,"abstract":"<div><p>The measurement field of view of the conventional transmission electron microscopy (TEM) nano-moiré and scanning transmission electron microscopy (STEM) nano-moiré methods is limited to the hundred-nanometer scale, unable to meet the deformation field measurement requirements of micrometer-scale materials such as transistors and micro-devices. This paper proposed a novel measurement method based on scanning secondary moiré, which can realize cross-scale deformation field measurement from nanometers to micrometers and solve the problem of insufficient measurement accuracy when using only the TEM moiré method. This method utilized the electron wave in the TEM passing through the atomic lattice of two layers of different materials to generate TEM moiré. On this basis, the TEM was tuned to the STEM mode, and by adjusting parameters such as the amount of defocusing, magnification, scanning angle, etc., the electron beam was focused on the position near the interface of the two layers of materials, and at the same time, the scanning line was made approximately parallel to the direction of one of the TEM moiré fringes. The scanning secondary moiré patterns were generated when the scanning spacing was close to the TEM moiré spacing. Through this method, the deformation field, mechanical properties, and internal defects of crystals can be detected by a large field of view with high sensitivity and high efficiency. Compared to traditional methods, the advantages of scanning secondary moiré method lie in significantly improving the measurement field of TEM moiré and STEM moiré methods, realizing the cross-scale visualization measurement from nanometers to micrometers, and possessing atomic-level displacement measurement sensitivity. It can also simplify and efficiently identify dislocations, offering a new method for large-area visualization observation of dislocation density in broad application prospects.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 2","pages":"300 - 308"},"PeriodicalIF":2.0,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786380","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

A Feasible Experimental Method to Measure the Adhesive Strength of Brittle Adherends 一种测定脆性粘结材料粘结强度的可行实验方法

IF 2.7 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-12-13 DOI: 10.1007/s10338-024-00565-6

Qiuhong Liu, Shuo Sun, Xiang Wu, Zhiqiang Chen, Hongjie Guo, Chen Duan, Zhengjin Wang

{"title":"A Feasible Experimental Method to Measure the Adhesive Strength of Brittle Adherends","authors":"Qiuhong Liu, Shuo Sun, Xiang Wu, Zhiqiang Chen, Hongjie Guo, Chen Duan, Zhengjin Wang","doi":"10.1007/s10338-024-00565-6","DOIUrl":"10.1007/s10338-024-00565-6","url":null,"abstract":"<div><p>Brittle materials, such as silicon, glass, and ceramics, are widely used in engineering via adhesive bonding. The assessment of adhesive strength of brittle materials to other adherends is essential for their applications. Compared with metals and composites, for which standard testing methods have been established, the experimental method for brittle adherends has been much less explored. During the adhesive strength test, the brittleness of these materials makes them prone to failure, rather than the interface. It remains a challenge to measure the adhesive strength of brittle adherends. Here we develop an experimental method to address this issue by using a strap joint specimen with a backing layer. We use a single crystal silicon wafer and two PCB (printed circuit board) strips as adherends to make a strap joint specimen. A steel backing layer is glued to the silicon wafer to prevent the failure of silicon. This method enables the measurement of adhesive strength up to 35 MPa. In contrast, that without backing layer can only measure the adhesive strength below 10 MPa. It is found that the backing layer can reduce the stress in the silicon remarkably, while it has much less effect on the stress in the adhesive layer. We confirm that the backing layer has a negligible effect on the measured adhesive strength but expands the working space greatly. Combining finite element analysis and experiments, we establish the phase diagram for the failure modes. This work provides guidance for the measurement of adhesive strength of brittle materials.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 4","pages":"598 - 611"},"PeriodicalIF":2.7,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144923146","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

Inflation of a Circular Hyperelastic Membrane: A Numerical Analysis 圆形超弹性膜的膨胀：数值分析

IF 2.7 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-12-10 DOI: 10.1007/s10338-024-00562-9

Zike Chen, Lingrui Zhu, Lin Zhan, Rui Xiao

{"title":"Inflation of a Circular Hyperelastic Membrane: A Numerical Analysis","authors":"Zike Chen, Lingrui Zhu, Lin Zhan, Rui Xiao","doi":"10.1007/s10338-024-00562-9","DOIUrl":"10.1007/s10338-024-00562-9","url":null,"abstract":"<div><p>The inflation tests of rubbery membranes have been widely employed as an efficient method to characterize the stress response as biaxial loading states. However, most of the previous theoretical works have employed classic hyperelastic models to analyze the deformation behaviors of inflated membranes. The classic models have been demonstrated to lack the ability to capturing the biaxial deformation of rubbers. To address this issue, we have combined the analytical method and the finite element simulation to investigate the deformation response of soft membranes with different constitutive relationships. For the analytical method, the governing ordinary differential equations have been set up for the boundary value problem of inflation tests and further solved using the shooting method. The analytical results are consistent with those obtained from finite element simulation. The results show that the deformation belongs to the unequal biaxial condition rather than the equi-biaxial state unless a neo-Hookean model is adopted. We also perform a parameter study using the extended eight-chain model, which shows that a change in different parameters affects the mechanical response of inflation tests variously. This work may shed light on the future experimental characterization of soft materials using inflation experiments.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 4","pages":"651 - 663"},"PeriodicalIF":2.7,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144923242","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

Developments and Future Perspectives in Nanowires Mechanics 纳米线力学的发展与展望

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-11-29 DOI: 10.1007/s10338-024-00558-5

Junxiang Xiang, Heyi Wang, Jingzhuo Zhou, Yang Lu

引用次数: 0

Nonlinear Resonance Response of Suspended Cables Under Multi-Frequency Excitations and Time-Delayed Feedback 多频激励和时滞反馈下悬索的非线性共振响应

IF 2.7 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-11-29 DOI: 10.1007/s10338-024-00555-8

Jian Peng, Hui Xia, Lianhua Wang, Xiaoyu Zhang, Xianzhong Xie

{"title":"Nonlinear Resonance Response of Suspended Cables Under Multi-Frequency Excitations and Time-Delayed Feedback","authors":"Jian Peng, Hui Xia, Lianhua Wang, Xiaoyu Zhang, Xianzhong Xie","doi":"10.1007/s10338-024-00555-8","DOIUrl":"10.1007/s10338-024-00555-8","url":null,"abstract":"<div><p>This study investigates the nonlinear resonance responses of suspended cables subjected to multi-frequency excitations and time-delayed feedback. Two specific combinations and simultaneous resonances are selected for detailed examination. Initially, utilizing Hamilton’s variational principle, a nonlinear vibration control model of suspended cables under multi-frequency excitations and longitudinal time-delayed velocity feedback is developed, and the Galerkin method is employed to obtain the discrete model. Subsequently, focusing solely on single-mode discretization, analytical solutions for the two simultaneous resonances are derived using the method of multiple scales. The frequency response equations are derived, and the stability analysis is presented for two simultaneous resonance cases. The results demonstrate that suspended cables exhibit complex nonlinearity under multi-frequency excitations. Multiple solutions under multi-frequency excitation can be distinguished through the frequency–response and the detuning-phase curves. By adjusting the control gain and time delay, the resonance range, response amplitude, and phase of suspended cables can be modified.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 4","pages":"689 - 700"},"PeriodicalIF":2.7,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144923156","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

Bending Characteristics of Folded Multi-celled Tubes with Square and Circular Section Geometries 方形和圆形截面折叠多胞管的弯曲特性

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-11-22 DOI: 10.1007/s10338-024-00533-0

Rui Liang, Fengxiang Xu, Zhen Zou, Xiaoqiang Niu, Xuebang Tang, Tingpeng Li

{"title":"Bending Characteristics of Folded Multi-celled Tubes with Square and Circular Section Geometries","authors":"Rui Liang, Fengxiang Xu, Zhen Zou, Xiaoqiang Niu, Xuebang Tang, Tingpeng Li","doi":"10.1007/s10338-024-00533-0","DOIUrl":"10.1007/s10338-024-00533-0","url":null,"abstract":"<div><p>This research investigates the bending response of folded multi-celled tubes (FMTs) fabricated by folded metal sheets. A three-point bending test for FMTs with circular and square sections is designed and introduced. The base numerical models are correlated with physical experiments and a static crashworthiness analysis of six FMT configurations to assess their energy absorption characteristics. The influences of thickness, sectional shape, and load direction on the bending response are studied. Results indicate that increasing the thickness of the tube and radian of the inner tube enhances the crashworthiness performance of FMT, yielding a 20.50% increase in mean crushing force, a 55.53% increase in specific energy absorption, and an 18.05% decrease in peak crushing force compared to traditional multi-celled tubes (TMTs). A theoretical analysis of the specific energy absorption indicates that FMTs outperform TMTs, particularly when the peak crushing force is prominent. This study highlights the innovative and practical potential of FMTs to improve the crashworthiness of thin-walled structures.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 1","pages":"125 - 141"},"PeriodicalIF":2.0,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431052","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

Effect of Ferromagnetic Particles on the Effective Mechanical Properties of Bulk Superconductor with Interfacial Effect 具有界面效应的铁磁粒子对块体超导体有效力学性能的影响

IF 2.7 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-11-22 DOI: 10.1007/s10338-024-00556-7

Ping Ma, Yufeng Zhao

引用次数: 0

Experimental Studies on the Mechanics of Graphene: A Review 石墨烯力学实验研究综述

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-11-18 DOI: 10.1007/s10338-024-00537-w

Pei Zhao

引用次数: 0

Mechanical Properties and Plastic Deformation Mechanisms of Polycrystalline Lithium Metal 多晶锂金属的力学性能及塑性变形机理

IF 2.7 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-11-18 DOI: 10.1007/s10338-024-00553-w

Jiaxuan Wang, Yaxin Fang, Junfu Gao, Feng Hao

{"title":"Mechanical Properties and Plastic Deformation Mechanisms of Polycrystalline Lithium Metal","authors":"Jiaxuan Wang, Yaxin Fang, Junfu Gao, Feng Hao","doi":"10.1007/s10338-024-00553-w","DOIUrl":"10.1007/s10338-024-00553-w","url":null,"abstract":"<div><p>Lithium metal batteries have been deemed one of the most promising candidates for new-generation batteries, used in mobile devices, electric vehicles, energy storage, etc. However, due to the volume change of active materials and external pressure, the electrode materials and interfaces between battery components have high stresses during the cycling process, resulting in large deformation of the lithium metal anode. Herein, we derive insights into the mechanical behaviors of polycrystalline lithium metal. Specifically, the mechanical properties of lithium metal containing Li<sub>7-x</sub>La<sub>3</sub>Zr<sub>2-x</sub>Ta<sub>x</sub>O<sub>12</sub> (x = 0.2–0.7) (LLZTO) solid-state electrolyte impurities are experimentally investigated. It is found that its strength is governed by impurity content and impurity particle size. In addition, we explore the Hall–Petch and inverse Hall–Petch effects of nanocrystalline lithium through atomic-scale simulations, revealing the plastic deformation mechanism in polycrystalline lithium metal. This fundamental study sheds light on the impurity-modulated mechanical properties and plastic deformation mechanism of polycrystalline lithium metal.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 3","pages":"436 - 445"},"PeriodicalIF":2.7,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166429","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

Molecular Dynamics Study on the Interactions of 1/2[110] Edge Dislocations with Voids and Ni3Al Precipitates in FCC Ni FCC Ni中1/2[110]边位错与孔洞和Ni3Al相相互作用的分子动力学研究

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-11-11 DOI: 10.1007/s10338-024-00531-2

Wendong Cui, Junfeng Nie, Pandong Lin, Lei He

{"title":"Molecular Dynamics Study on the Interactions of 1/2[110] Edge Dislocations with Voids and Ni3Al Precipitates in FCC Ni","authors":"Wendong Cui, Junfeng Nie, Pandong Lin, Lei He","doi":"10.1007/s10338-024-00531-2","DOIUrl":"10.1007/s10338-024-00531-2","url":null,"abstract":"<div><p>Nickel-based alloys are the primary structural materials in steam generators of high-temperature gas reactors. To understand the irradiation effect of nickel-based alloys, it is necessary to examine dislocation movement and its interaction with irradiation defects at the microscale. Hardening due to voids and Ni<sub>3</sub>Al precipitates may significantly impact irradiation damage in nickel-based alloys. This paper employs the molecular dynamics method to analyze the interaction between edge dislocations and irradiation defects (void and Ni<sub>3</sub>Al precipitates) in face-centered cubic nickel. The effects of temperature and defect size on the interaction are also explored. The results show that the interaction process of the edge dislocation and irradiation defects can be divided into four stages: dislocation free slip, dislocation attracted, dislocation pinned, and dislocation unpinned. Interaction modes include the formation of stair-rod dislocations and the climbing of extended dislocation bundles for voids, as well as the generation of stair-rod dislocation and dislocation shear for precipitates. Besides, the interactions of edge dislocations with voids and Ni<sub>3</sub>Al precipitates are strongly influenced by temperature and defect size.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 1","pages":"1 - 13"},"PeriodicalIF":2.0,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430876","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