Acta Mechanica Solida Sinica最新文献_第7页

An Instrumented Sharp Indentation Method for Measuring Equibiaxial Residual Stress without Using Stress-Free Specimens 一种不使用无应力试样测量等双轴残余应力的仪器锐压痕方法

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-10-21 DOI: 10.1007/s10338-024-00534-z

Guangjian Peng, Saifei Li, Liang Zhang, Peijian Chen, Wei Xiong, Taihua Zhang

{"title":"An Instrumented Sharp Indentation Method for Measuring Equibiaxial Residual Stress without Using Stress-Free Specimens","authors":"Guangjian Peng, Saifei Li, Liang Zhang, Peijian Chen, Wei Xiong, Taihua Zhang","doi":"10.1007/s10338-024-00534-z","DOIUrl":"10.1007/s10338-024-00534-z","url":null,"abstract":"<div><p>The presence of residual stresses in materials or engineering structures can significantly influence their mechanical performance. Accurate measurement of residual stresses is of great importance to ensure their in-service reliability. Although numerous instrumented indentation methods have been proposed to evaluate residual stresses, the majority of them require a stress-free reference sample as a comparison benchmark, thereby limiting their applicability in scenarios where obtaining stress-free reference samples is challenging. In this work, through a number of finite element simulations, it was found that the loading exponent of the loading load-depth curve and the recovered depth during unloading are insensitive to residual stresses. The loading curve of the stress-free specimen was virtually reconstructed using such stress-insensitive parameters extracted from the load-depth curves of the stressed state, thus eliminating the requirement for stress-free reference samples. The residual stress was then correlated with the fractional change in loading work between stressed and stress-free loading curves through dimensional analysis and finite element simulations. Based on this correlation, an instrumented sharp indentation method for measuring equibiaxial residual stress without requiring a stress-free specimen was established. Both numerical and experimental verifications were carried out to demonstrate the accuracy and reliability of the newly proposed method. The maximum relative error and absolute error in measured residual stresses are typically within ± 20% and ± 20 MPa, respectively.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 2","pages":"290 - 299"},"PeriodicalIF":2.0,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786438","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

Accessing Elastic Properties of Porous Solid Oxide Fuel Cell Electrodes Using 2D Image-Based Discrete Element Modeling and Deep Learning 基于二维图像离散元建模和深度学习的多孔固体氧化物燃料电池电极弹性特性研究

IF 2.7 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-10-21 DOI: 10.1007/s10338-024-00535-y

Shihao Zhou, Yan Zeng, Xuhao Liu, Xianhang Li, Christophe L. Martin, Naoki Shikazono, Shotaro Hara, Zilin Yan, Zheng Zhong

{"title":"Accessing Elastic Properties of Porous Solid Oxide Fuel Cell Electrodes Using 2D Image-Based Discrete Element Modeling and Deep Learning","authors":"Shihao Zhou, Yan Zeng, Xuhao Liu, Xianhang Li, Christophe L. Martin, Naoki Shikazono, Shotaro Hara, Zilin Yan, Zheng Zhong","doi":"10.1007/s10338-024-00535-y","DOIUrl":"10.1007/s10338-024-00535-y","url":null,"abstract":"<div><p>The mechanical properties of solid oxide fuel cells (SOFCs) can limit their mechanical stability and lifespan. Understanding the correlation between the microstructure and mechanical properties of porous electrode is essential for enhancing the performance and durability of SOFCs. Accurate prediction of mechanical properties of porous electrode can be achieved by microscale finite element modeling based on three-dimensional (3D) microstructures, which requires expensive 3D tomography techniques and massive computational resources. In this study, we proposed a cost-effective alternative approach to access the mechanical properties of porous electrodes, with the elastic properties of La<sub>0.6</sub>Sr<sub>0.4</sub>Co<sub>0.2</sub>Fe<sub>0.8</sub>O<sub>3−δ</sub> cathode serving as a case study. Firstly, a stochastic modeling was used to reconstruct 3D microstructures from two-dimensional (2D) cross-sections as an alternative to expensive tomography. Then, the discrete element method (DEM) was used to predict the elastic properties of porous ceramics based on the discretized 3D microstructures reconstructed by stochastic modeling. Based on 2D microstructure and the elastic properties calculated by the DEM modeling of the 3D reconstructed porous microstructures, a convolutional neural network (CNN) based deep learning model was built to predict the elastic properties rapidly from 2D microstructures. The proposed combined framework can be implemented with limited computational resources and provide a basis for rapid prediction of mechanical properties and parameter estimation for multiscale modeling of SOFCs.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 3","pages":"384 - 401"},"PeriodicalIF":2.7,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167240","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

Enhancement of Quality Factor in Gain-Assisted Acoustic Resonance Systems 增益辅助声共振系统中品质因子的增强

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-10-21 DOI: 10.1007/s10338-024-00530-3

Lei Zhang, Linlin Geng, Yonghui Zhang, Youdong Duan, Jinbo Yuan, Xiaoming Zhou

{"title":"Enhancement of Quality Factor in Gain-Assisted Acoustic Resonance Systems","authors":"Lei Zhang, Linlin Geng, Yonghui Zhang, Youdong Duan, Jinbo Yuan, Xiaoming Zhou","doi":"10.1007/s10338-024-00530-3","DOIUrl":"10.1007/s10338-024-00530-3","url":null,"abstract":"<div><p>Damped acoustic systems have a limited quality factor due to intrinsic loss. By introducing gain elements, a method to enhance the quality factor of damped systems is proposed based on the concept of bound states in the continuum (BICs). The acoustic model under study is a two-port waveguide system installed with two side Helmholtz resonators connected by a coupling tube. Based on the temporal coupled-mode theory, a Hamiltonian matrix with both intrinsic and radiation losses is used to characterize the resonance behavior of the coupled resonators. To achieve a high quality factor, acoustic gain is introduced to compensate the intrinsic loss, leading the Hamiltonian parameters toward a quasi-BIC condition. Numerical simulation demonstrates a gain-assisted and quasi-BIC-supported extremely high quality factor in damped acoustic systems. The concept is further utilized to design a sensor model for particle size detection. The enhanced sensing performance due to high quality factors is numerically demonstrated. The findings suggest potential applications in acoustic sensing and detection devices.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 1","pages":"25 - 32"},"PeriodicalIF":2.0,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430785","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

Enhancing the Capacity and Cycling Performance of Lithium Ion Batteries Through Perforated Current Collectors 通过多孔集流器提高锂离子电池的容量和循环性能

IF 2.7 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-10-18 DOI: 10.1007/s10338-024-00519-y

Qi Zou, Jianjun Nie, Bo Lu, Yinhua Bao, Yicheng Song, Junqian Zhang

{"title":"Enhancing the Capacity and Cycling Performance of Lithium Ion Batteries Through Perforated Current Collectors","authors":"Qi Zou, Jianjun Nie, Bo Lu, Yinhua Bao, Yicheng Song, Junqian Zhang","doi":"10.1007/s10338-024-00519-y","DOIUrl":"10.1007/s10338-024-00519-y","url":null,"abstract":"<div><p>Lithium ion batteries are important for new energy technologies and manufacturing systems. However, enhancing their capacity and cycling stability poses a significant challenge. This study proposes a novel method, i.e., modifying current collectors with perforations, to address these issues. Lithium ion batteries with mechanically perforated current collectors are prepared and tested with charge/discharge cycles, revealing superior capacity as well as enhanced electrochemical stability over cycles. Impedance spectroscopy, scanning electron microscopy, and peeling tests are conducted to investigate the underlying mechanisms. Higher peel resistance, minimized interface cracking, and reduced electrical impedance are found in the perforated electrodes after cycles. Investigations indicate that the perforation holes on current collectors allow the active materials coating on the two sides of the current collector to bind together and, thus, lead to enhanced adhesion between the current collector and active layer. Mechanical simulation illustrates the role of perforated current collectors in curbing interface cracking during lithiation, while electrochemical simulation shows that the interfacial cracking hinders the diffusion of lithium ions, thereby increasing battery impedance and reducing the cyclic performance. This investigation reveals the potential of designing non-active battery components to enhance battery performance, advocating a nuanced approach to battery design emphasizing structural integrity and interface optimization.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 3","pages":"539 - 548"},"PeriodicalIF":2.7,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167070","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

Evaluating the Effects of Grain Anisotropy on the Effective Chemo-Mechanical Properties of Secondary Particles in Lithium-Ion Batteries 晶粒各向异性对锂离子电池二次粒子有效化学力学性能影响的评价

IF 2.7 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-10-15 DOI: 10.1007/s10338-024-00536-x

Bisheng Hu, Ying Zhao

{"title":"Evaluating the Effects of Grain Anisotropy on the Effective Chemo-Mechanical Properties of Secondary Particles in Lithium-Ion Batteries","authors":"Bisheng Hu, Ying Zhao","doi":"10.1007/s10338-024-00536-x","DOIUrl":"10.1007/s10338-024-00536-x","url":null,"abstract":"<div><p>The microstructure of positive electrode polycrystalline particles (secondary particles) directly affects their diffusion and mechanical properties. In this study, a quantitative evaluation of the effects of grain anisotropy on the overall diffusion and mechanical properties of secondary particles is conducted, which is based on a simplified 2D polycrystalline model with hexagonal anisotropic grains (primary particles) with different distributed orientations. The research results indicate that consistent grain orientation can promote the uniform distribution of lithium ions, while lower diffusion anisotropy can promote the diffusion of lithium ions along shorter paths, thereby improving the diffusion properties of secondary particles. Lower elastic anisotropy of grains and a grain orientation distribution with a 60° angle favor maintaining the macroscopic elastic isotropy of secondary particles. The study also found that when the number of grains is large enough and the orientation distribution is sufficiently random, secondary particles exhibit macroscopic diffusion isotropy and elastic isotropy.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 3","pages":"415 - 425"},"PeriodicalIF":2.7,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165789","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 Hydrogen on the Transformation Ratcheting of NiTi SMA Wires: Experiment and Modeling 氢对NiTi SMA丝相变棘轮的影响：实验与模型

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-10-14 DOI: 10.1007/s10338-024-00529-w

Han M. Jiang, Wenxiang Shi, Chao Yu, Guozheng Kang

{"title":"Effect of Hydrogen on the Transformation Ratcheting of NiTi SMA Wires: Experiment and Modeling","authors":"Han M. Jiang, Wenxiang Shi, Chao Yu, Guozheng Kang","doi":"10.1007/s10338-024-00529-w","DOIUrl":"10.1007/s10338-024-00529-w","url":null,"abstract":"<div><p>This paper investigates the effect of hydrogen on the transformation ratcheting of NiTi shape memory alloy (SMA) wires in the experimental and theoretical aspects. In the aspect of experiments, the NiTi SMA orthodontic wires are hydrogen charged by the electrochemical charging method at room temperature with varying charging durations and charging lengths. After that, the <i>ex-situ</i> cyclic tension-unloading experiments are performed for the charged and non-charged wires. Experimental results reveal that the two transformation platforms (two-step MT) occur during the forward MT at the beginning and end of cyclic deformation for hydrogen-charged wires, which can be regarded as a global response of the non-charged and charged regions. Furthermore, this two-step MT and transformation ratcheting aggravate with the increase of the charging duration. In the aspect of the theoretical model, a diffusional-mechanically coupled constitutive model is developed. In this constitutive model, the strain is considered as four components: elasticity, transformation (MT), hydrogen expansion and transformation-induced plasticity (TRIP). Combining Helmholtz free energy and Clausius–Duhem inequality, the thermodynamic driving forces of MT and TRIP are obtained. Fick’s law and the mass conservation equation are incorporated to derive the evolution of hydrogen concentration. A transition from material points to the whole wire is employed to extend the model from a material point to the entire wire, and the overall response with a heterogeneous hydrogen concentration field is obtained. The proposed model's ability to predict the transformation ratcheting of the non-charged and charged NiTi SMA wires is verified by contrasting predictions and experimental results.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 1","pages":"33 - 44"},"PeriodicalIF":2.0,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431019","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 Meshfree Approach for Dynamic Analysis of Sandwich Conical and Cylindrical Shells with Varying Thicknesses 变厚度夹层锥形和圆柱壳动力分析的无网格方法

IF 2.7 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-10-10 DOI: 10.1007/s10338-024-00528-x

Songhun Kwak, Yon Kim, Jongguk Yun, Unjong Jo

引用次数: 0

Frictional Adhesive Contact of Multiferroic Coatings Based on the Hybrid Element Method 基于混合元法的多铁涂层摩擦粘接接触

IF 2.7 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-10-10 DOI: 10.1007/s10338-024-00526-z

Yanxin Li, Bo Pan, Yun Tian, Lili Ma, Nicola Menga, Xin Zhang

引用次数: 0

Indentation of a Plate on a Thin Transversely Isotropic Elastic Layer 横向各向同性弹性薄层上板的压痕

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-10-07 DOI: 10.1007/s10338-024-00532-1

Juyao Li, Guozheng Zhang, Liu Wang, Zhaohe Dai

{"title":"Indentation of a Plate on a Thin Transversely Isotropic Elastic Layer","authors":"Juyao Li, Guozheng Zhang, Liu Wang, Zhaohe Dai","doi":"10.1007/s10338-024-00532-1","DOIUrl":"10.1007/s10338-024-00532-1","url":null,"abstract":"<div><p>This work investigates the indentation response of an elastic plate resting upon a thin, transversely isotropic elastic layer supported by a rigid substrate. Such a scenario is encountered across a range of length scales from piezoresistive tests on graphite nanoflakes to the bending of floating ice shelves atop seabed, where the elastic layer commonly exhibits certain anisotropy. We first develop an approximate model to describe the elastic response of a transversely isotropic layer by exploiting the slenderness of the layer. We show that this approximate model can be reduced to the classic compressible Winkler foundation model as the elastic constants of the layer are set isotropic. We then investigate the combined response of an elastic plate on the transversely isotropic elastic layer. Facilitated by the simplicity of our proposed approximate model, we can derive simple analytical solutions for the cases of small and large indenter radii. The analytical results agree well with numerical calculations obtained via finite element methods, as long as the system is sufficiently slender in a mechanical sense. These results offer quantitative insights into the mechanical behavior of numerous semiconductor materials characterized by transverse isotropy and employed with slender geometries in various practical applications where the thin layer works as conductive and functional layers.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 2","pages":"331 - 340"},"PeriodicalIF":2.0,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786485","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 Core Structure on the Mechanical and Electromagnetic Properties of High-Temperature Superconducting Cables 芯结构对高温超导电缆力学和电磁性能的影响

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-10-07 DOI: 10.1007/s10338-024-00527-y

Jiangtao Yan, Yuanwen Gao

{"title":"Effect of Core Structure on the Mechanical and Electromagnetic Properties of High-Temperature Superconducting Cables","authors":"Jiangtao Yan, Yuanwen Gao","doi":"10.1007/s10338-024-00527-y","DOIUrl":"10.1007/s10338-024-00527-y","url":null,"abstract":"<div><p>Research on the mechanical–electrical properties is crucial for designing and preparing high-temperature superconducting (HTS) cables. Various winding core structures can influence the mechanical–electrical behavior of cables, but the impact of alterations in the winding core structure on the mechanical–electrical behavior of superconducting cables remains unclear. This paper presents a 3D finite element model to predict the performance of three cables with different core structures when subjected to transverse compression and axial tension. The three cables analyzed are CORC (conductor-on-round-core), CORT (conductor-on-round-tube), and HFRC (conductor-on-spiral-tube). A parametric analysis is carried out by varying the core diameter and inner-to-outer diameter ratio. Results indicate that the CORT cable demonstrates better performance in transverse compression compared to the CORC cable, aligning with experimental data. Among the three cables, the HFRC cables exhibit the weakest resistance to transverse deformation. However, the HFRC cable demonstrates superior tensile deformation resistance compared to the CORT cable, provided that the transverse compression properties are maintained. Finite element results also show that the optimum inner-to-outer diameter ratios for achieving the best transverse compression performance are approximately 0.8 for CORT cables and 0.6 for HFRC cables. Meanwhile, the study explores the effect of structural changes in HTS cable winding cores on their electromagnetic properties. It recommends utilizing small tape gaps, lower frequencies, and spiral core construction to minimize eddy losses. The findings presented in this paper offer valuable insights for the commercialization and practical manufacturing of HTS cables.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 1","pages":"14 - 24"},"PeriodicalIF":2.0,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430978","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