Acta Mechanica Solida Sinica最新文献_第2页

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

Adhesion of 2D Materials: Measurement and Modulation 二维材料的附着力：测量和调制

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-11-11 DOI: 10.1007/s10338-024-00552-x

Na Li, Hongrong Wu, Changwei Sun, Junhua Zhao

{"title":"Adhesion of 2D Materials: Measurement and Modulation","authors":"Na Li, Hongrong Wu, Changwei Sun, Junhua Zhao","doi":"10.1007/s10338-024-00552-x","DOIUrl":"10.1007/s10338-024-00552-x","url":null,"abstract":"<div><p>Two-dimensional (2D) materials are promising for next-generation electronic devices and systems due to their unique physical properties. The interfacial adhesion plays a vital role not only in the synthesis, transfer and manipulation of 2D materials but also in the manufacture, integration and performance of the functional devices. However, the atomic thickness and limited lateral dimensions of 2D materials make the accurate measurement and modulation of their interfacial adhesion energy challenging. In this review, the recent advances in the measurement and modulation of the interfacial adhesion properties of 2D materials are systematically combed. Experimental methods and relative theoretical models for the adhesion measurement of 2D materials are summarized, with their scope of application and limitations discussed. The measured adhesion energies between 2D materials and various substrates are described in categories, where the typical adhesion modulation strategies of 2D materials are also introduced. Finally, the remaining challenges and opportunities for the interfacial adhesion measurement and modulation of 2D materials are presented. This paper provides guidance for addressing the adhesion issues in devices and systems involving 2D materials.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 2","pages":"252 - 274"},"PeriodicalIF":2.0,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786529","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

Thermal Torsion Effect of Twisted Polymer Actuators 扭曲聚合物致动器的热扭转效应

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-11-04 DOI: 10.1007/s10338-024-00547-8

Jiongjiong Hu, Lei Liu, Hao Liu, Dabiao Liu

{"title":"Thermal Torsion Effect of Twisted Polymer Actuators","authors":"Jiongjiong Hu, Lei Liu, Hao Liu, Dabiao Liu","doi":"10.1007/s10338-024-00547-8","DOIUrl":"10.1007/s10338-024-00547-8","url":null,"abstract":"<div><p>Twisted polymer artificial muscles activated by thermal heating represent a new class of soft actuators capable of generating torsional actuation. The thermal torsion effect, characterized by the reversible untwisting of twisted fibers as temperature increases due to greater radial than axial thermal expansion, is crucial to the actuation performance of these artificial muscles. This study explores the thermal torsion effect of polymer muscles made of twisted Nylon 6 fibers in experimental and theoretical aspects, focusing on the interplay between material properties and temperature. It is revealed that the thermal torsion effect enhances the actuation performance of the twisted polymer actuator while the thermal softening effect diminishes it. A thermal–mechanical model incorporating both the thermal torsion effect and thermal softening effect is used to predict the recovered torque of the twisted polymer actuators. An optimal bias angle and operating temperature are identified to maximize the recovered torque. Analysis of strain and stress distributions in the cross-section of the twisted polymer fiber shows that the outer layers of the fiber predominantly contribute to the torsional actuation. This work aids in the precise control and structural optimization of the thermally-activated twisted polymer actuators.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 2","pages":"320 - 330"},"PeriodicalIF":2.0,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786510","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

Stress Waves Propagation Along the Frictional Interface with a Micro-contact 应力波沿微接触摩擦界面的传播

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-10-30 DOI: 10.1007/s10338-024-00540-1

Lingyan Shen, Yonggui Liu, Keyan Li, Xiaofei Ji, Xiangyu Jin

{"title":"Stress Waves Propagation Along the Frictional Interface with a Micro-contact","authors":"Lingyan Shen, Yonggui Liu, Keyan Li, Xiaofei Ji, Xiangyu Jin","doi":"10.1007/s10338-024-00540-1","DOIUrl":"10.1007/s10338-024-00540-1","url":null,"abstract":"<div><p>The stress wave profile at the frictional interface is crucial for investigating the frictional process. This study modeled a brittle material interface with a micro- contact to analyze the fine stress wave structure associated with frictional slip. Employing the finite element simulation alongside the related wave theory and experiments, two new wave structures were indentified: A Mach cone symmetric to the frictional interface associated with incident plane wave propagation, and a new plane longitudinal wave generated across the entire frictional interface at the moment when the incident wave began to propagate. The time and space of its appearance implies that the overall response of the frictional interface precedes the local wave response of the medium. Consequently, a model involving characteristic line theory and the idea of Green’s function has been proposed for its occurrence. The analysis results show that these two new wave phenomena are independent of the fracture of micro-contacts at the interface; instead, the frictional interface effect may be responsible for the generation of such new wave structures. The measured wave profiles provide a proof for the existence of the new wave structures. These results display new wave phenomena, and suggest a wave profile for investigating the dynamic mechanical properties of the frictional interface.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 1","pages":"152 - 165"},"PeriodicalIF":2.0,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10338-024-00540-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431024","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

Mechanism of Friction Enhancement Induced by Nanoscale Liquid Film: A Brief Review 纳米级液体膜诱导摩擦增强机理综述

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-10-28 DOI: 10.1007/s10338-024-00545-w

Tianyan Gao, Guorui Wang, Xin’an Chen, Zhong Zhang

{"title":"Mechanism of Friction Enhancement Induced by Nanoscale Liquid Film: A Brief Review","authors":"Tianyan Gao, Guorui Wang, Xin’an Chen, Zhong Zhang","doi":"10.1007/s10338-024-00545-w","DOIUrl":"10.1007/s10338-024-00545-w","url":null,"abstract":"<div><p>Surficial water adsorption and interfacial water condensation as natural phenomena play an essential role in the contact adhesion and friction performances of the solid interface. As the characteristic dimensions downscale to nanometers, the structure and dynamics of the water film at an interface differ significantly from those of its bulk counterpart. In particular, a specific wetting condition termed as the tacky regime has recently sparked great interest in the community, where transient high friction and contact instabilities are observed at the interface that is subjected to the wet-to-dry transition. Unveiling the influence of nanoscale water film on the friction enhancement in the tacky regime will provide theoretical guidance for the friction regulation in the wetting condition. In this article, special emphasis is placed on the development of experimental techniques which allow the visualization of the contact interface (e.g., contact surface deformation, real contact area) and characterization of water film structures (e.g., film thickness, molecular configuration). Building upon the accumulation of recent research activities, we provide an overview of significant advances in understanding the critical mechanisms for friction enhancement, such as vertical capillary force, interfacial shear strength, and ice-like water. Some common design strategies are further given to regulate the friction behavior by tuning the distribution of the water film, surface roughness, and elastic modulus. Finally, we end this review article with a summary of the research status and outlook on areas for future research directions.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 2","pages":"183 - 194"},"PeriodicalIF":2.0,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786504","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

Mechanical Properties of Star-Shaped Gradient Lattice Structures Under Tensile Load 拉伸载荷作用下星形梯度晶格结构的力学性能

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-10-28 DOI: 10.1007/s10338-024-00543-y

Hongyan Chen, Xiufang Zhu, Shuxiang Ma, Haiyang Yang

{"title":"Mechanical Properties of Star-Shaped Gradient Lattice Structures Under Tensile Load","authors":"Hongyan Chen, Xiufang Zhu, Shuxiang Ma, Haiyang Yang","doi":"10.1007/s10338-024-00543-y","DOIUrl":"10.1007/s10338-024-00543-y","url":null,"abstract":"<div><p>Star-shaped lattice structures with a negative Poisson’s ratio (NPR) effect exhibit excellent energy absorption capacity, making them highly promising for applications in aerospace, vehicles, and civil protection. While previous research has primarily focused on single-walled cells, there is limited investigation into negative Poisson’s ratio structures with nested multi-walled cells. This study designed three star-shaped cell structures and three lattice configurations, analyzing the Poisson’s ratio, stress–strain relationship, and energy absorption capacity through tensile experiments and finite element simulations. Among the single structures, the star-shaped configuration r3 demonstrated the best elastic modulus, NPR effect, and energy absorption effect. In contrast, the uniform lattice structure R3 exhibited the highest tensile strength and energy absorption capacity. Additionally, the stress intensity and energy absorption of gradient structures increased with the number of layers. This study aims to provide a theoretical reference for the application of NPR materials in safety protection across civil and vehicle engineering, as well as other fields.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 1","pages":"65 - 77"},"PeriodicalIF":2.0,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430833","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

Level-Set-Based Topology Optimization of a Geometrically Nonlinear Structure Considering Thermo-mechanical Coupling Effect 考虑热-力耦合效应的几何非线性结构的水平集拓扑优化

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-10-28 DOI: 10.1007/s10338-024-00542-z

Sujun Wang, An Xu, Ruohong Zhao

引用次数: 0

Influence of Porosity on Vibration of Porous FG Plates Resting on an Arbitrarily Orthotropic Winkler-Pasternak Foundation by PDDO 用PDDO研究任意正交各向异性温克尔-帕斯捷尔纳克地基上多孔FG板的孔隙率对振动的影响

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-10-21 DOI: 10.1007/s10338-024-00539-8

Yongyu Yang, Xiaoqi Wang, Hang Zhao, Chao Wang, Changzheng Cheng, Raj Das

{"title":"Influence of Porosity on Vibration of Porous FG Plates Resting on an Arbitrarily Orthotropic Winkler-Pasternak Foundation by PDDO","authors":"Yongyu Yang, Xiaoqi Wang, Hang Zhao, Chao Wang, Changzheng Cheng, Raj Das","doi":"10.1007/s10338-024-00539-8","DOIUrl":"10.1007/s10338-024-00539-8","url":null,"abstract":"<div><p>This paper studies the vibration responses of porous functionally graded (FG) thin plates with four various types of porous distribution based on the physical neutral plane by employing the peridynamic differential operator (PDDO). It is assumed that density and elastic modulus continuously vary along the transverse direction following the power law distribution for porous FG plates. The governing differential equation of free vibration for a porous rectangular FG plate and its associated boundary conditions are expressed by a Lévy-type solution based on nonlinear von Karman plate theory. Dimensionless frequencies and mode shapes are obtained after solving the characteristic equations established by PDDO. The results of the current method are validated through comparison with existing literature. The effects of geometric parameters, material properties, elastic foundation, porosity distribution, and boundary conditions on the frequency are investigated and discussed in detail. The highest fundamental dimensionless frequency occurs under SCSC boundary conditions, while the lowest is under SFSF boundary conditions. The porous FG plate with the fourth pore type, featuring high density of porosity at the top and low at the bottom, exhibits the highest fundamental frequency under SSSS, SFSF, and SCSC boundary conditions. The dimensionless frequency increases with an increase in the elastic foundation stiffness coefficient.</p></div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":"38 1","pages":"142 - 151"},"PeriodicalIF":2.0,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430786","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

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

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