Acta Mechanica Solida Sinica最新文献_第2页

Scattering of Shear Horizontal (SH) Waves by a Circular Hole in an Infinite Piezomagnetic Material 无限压磁材料中的圆孔对剪切水平（SH）波的散射

IF 2.2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-08-12 DOI: 10.1007/s10338-024-00508-1

Qiang Li, Chunlong Gu, Dongxia Lei, Zhiying Ou

引用次数: 0

Sliding Electrical Contact Model Considering Frictional and Joule Heating 考虑摩擦和焦耳热的滑动电接触模型

IF 2.2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-08-12 DOI: 10.1007/s10338-024-00511-6

Hang-Cen Dai, Fei Shen, You-Hua Li, Liao-Liang Ke

{"title":"Sliding Electrical Contact Model Considering Frictional and Joule Heating","authors":"Hang-Cen Dai, Fei Shen, You-Hua Li, Liao-Liang Ke","doi":"10.1007/s10338-024-00511-6","DOIUrl":"https://doi.org/10.1007/s10338-024-00511-6","url":null,"abstract":"A theoretical model is developed to investigate the sliding electrical contact behavior with the consideration of the electrical-thermal–mechanical coupling effect. The interfacial electrical resistance and electrical constriction resistance are both involved. The Joule heating due to electrical contact resistance and the frictional energy dissipation are considered in the model for the assessment of the temperature rise at the contact interface. A singular integral equation for sliding electrical contact considering both frictional and Joule heat is developed and solved to obtain the contact pressure, current density, and temperature rise. Furthermore, a discrete fast Fourier transform-based boundary element method is applied to obtain the numerical solution of sliding electrical contact. Good agreement is achieved between theoretical and numerical results. After the validation, the effects of potential drop and sliding velocity on sliding electrical contact behavior are investigated. The results indicate that the proposed theoretical model can provide an exact prediction of multi-physics sliding electrical contact behavior.","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175109","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 Two-Way FSI Model for Pathologic Respiratory Processes with Precisely Structured and Flexible Upper Airway 具有精确结构和灵活上气道的病理呼吸过程双向 FSI 模型

IF 2.2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-08-05 DOI: 10.1007/s10338-024-00510-7

Yuan Qin, Honghao Zhang, Zhiwei Qiu, Lei Liu, Hui Yang, Jiutao Hang, Dong Wei, Guangkui Xu

{"title":"A Two-Way FSI Model for Pathologic Respiratory Processes with Precisely Structured and Flexible Upper Airway","authors":"Yuan Qin, Honghao Zhang, Zhiwei Qiu, Lei Liu, Hui Yang, Jiutao Hang, Dong Wei, Guangkui Xu","doi":"10.1007/s10338-024-00510-7","DOIUrl":"https://doi.org/10.1007/s10338-024-00510-7","url":null,"abstract":"The human body displays various symptoms of altitude sickness due to hypoxia in environments with low pressure and oxygen levels. While existing studies are primarily focused on the adverse effects of hypoxia and oxygen supplementation strategies at high altitudes, there is a notable gap in understanding the fundamental mechanisms driving altitude hypoxia. In this context, we propose a sophisticated two-way fluid–structure interaction model that simulates respiratory processes with precisely structured and deformable upper airways. This model reveals that, under identical pressure differentials at the airway’s inlet and outlet, the inspiratory air volume remains largely consistent and is minimally affected by specific pressure changes. However, an increase in the pressure differential enhances gas inhalation efficiency. Furthermore, airway morphology emerges as a pivotal factor influencing oxygen intake. Distorted airway shapes create areas of high flow velocity, where low wall pressure hampers effective airway opening, thus diminishing gas inhalation. These results may shed light on the effects of low-pressure conditions and upper airway structure on respiratory dynamics at high altitudes and inform the development of effective oxygen supply strategies.","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141929717","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 Numerical Model of Heating and Cooling Cycles to Study the Driven Response for Twisted and Coiled Polymer Actuator 研究扭曲和盘绕聚合物致动器驱动响应的加热和冷却循环数值模型

IF 2.2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-08-05 DOI: 10.1007/s10338-024-00512-5

Zhiwen Gao, Yuhao Zhang, Juanjuan Guo, Hua Li, Bin Chen, Jizeng Wang

{"title":"A Numerical Model of Heating and Cooling Cycles to Study the Driven Response for Twisted and Coiled Polymer Actuator","authors":"Zhiwen Gao, Yuhao Zhang, Juanjuan Guo, Hua Li, Bin Chen, Jizeng Wang","doi":"10.1007/s10338-024-00512-5","DOIUrl":"https://doi.org/10.1007/s10338-024-00512-5","url":null,"abstract":"Twisted and coiled polymer actuator (TCPA) is a type of artificial muscle that can be driven by heating due to its structure. A key issue with TCPA performance is the low driven frequency due to slow heat transfer in heating and cooling cycles, especially during cooling. We developed a numerical model of coating heating and nitrogen gas cooling that can effectively improve the driven forces and frequencies of the TCPA. Results indicate that natural cooling and electric fan cooling modes used in many experiments cannot restore the TCPA to its initial configuration when driven frequencies are high. Nitrogen gas cooling, at high driven frequencies, can fully restore the TCPA to its initial configuration, which is crucial for maintaining artificial muscle flexibility. In addition, as driven frequency increases, the corresponding driven force decreases. Systematic parametric studies were carried out to provide inspirations for optimizing TCPA design. The integrative computational study presented here provides a fundamental mechanistic understanding of the driven response in TCPA and sheds light on the rational design of TCPA through changing cooling modes.","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141929723","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 and Vibration Analysis of Trigonometric Varying Functionally Graded Material via a Novel Third-Order Shear Deformation Theory 通过新的三阶剪切变形理论分析三角变化功能分级材料的弯曲和振动

IF 2.2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-08-05 DOI: 10.1007/s10338-024-00507-2

Fei Chen, Xiaofei Zhao, Zhifeng Huang, Jun Lei, Chi Zhang, Pin Wen

{"title":"Bending and Vibration Analysis of Trigonometric Varying Functionally Graded Material via a Novel Third-Order Shear Deformation Theory","authors":"Fei Chen, Xiaofei Zhao, Zhifeng Huang, Jun Lei, Chi Zhang, Pin Wen","doi":"10.1007/s10338-024-00507-2","DOIUrl":"https://doi.org/10.1007/s10338-024-00507-2","url":null,"abstract":"Given the significant potential of multi-directional functionally graded materials (MFGMs) for customizable performance, it is crucial to develop versatile material models to enhance design optimization in engineering applications. This paper introduces a material model for an MFGM plate described by trigonometric functions, equipped with four parameters to control diverse material distributions effectively. The bending and vibration analysis of MFGM rectangular and cutout plates is carried out utilizing isogeometric analysis, which is based on a novel third-order shear deformation theory (TSDT) to account for transverse shear deformation. The present TSDT, founded on rigorous kinematics of displacements, is demonstrated to surpass other preceding theories. It is derived from an elasticity formulation, rather than relying on the hypothesis of displacements. The effectiveness of the proposed method is verified by comparing its numerical results with those of other methods reported in the relevant literature. Numerical results indicate that the structure, boundary conditions, and gradient parameters of the MFGM plate significantly influence its deflection, stress, and vibration frequency. As the periodic parameter exceeds four, the model complexity increases, causing result fluctuations. Additionally, MFGM cutout plates, when clamped on all sides, display almost identical first four vibration frequencies.","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141929715","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

Applying the Infrared Self-heating Method to a Comprehensive Fatigue Analysis of NiTi Shape Memory Alloys 将红外自加热法应用于镍钛形状记忆合金的综合疲劳分析

IF 2.2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-08-05 DOI: 10.1007/s10338-024-00513-4

Yongdan Zhou, Zihong Liu, Yahui Zhang, Xiaojun Gu, Jihong Zhu, Weihong Zhang

{"title":"Applying the Infrared Self-heating Method to a Comprehensive Fatigue Analysis of NiTi Shape Memory Alloys","authors":"Yongdan Zhou, Zihong Liu, Yahui Zhang, Xiaojun Gu, Jihong Zhu, Weihong Zhang","doi":"10.1007/s10338-024-00513-4","DOIUrl":"https://doi.org/10.1007/s10338-024-00513-4","url":null,"abstract":"This paper aims to seek expedited fatigue analysis methods using the infrared self-heating technique. The fatigue analysis of NiTi shape memory alloys is obtained through a hybrid approach: fatigue tests to failure yield relatively shorter fatigue lives, while determining the fatigue limit, normally involving extremely high cycles approaching 107 cycles, is directly achieved via self-heating tests. This methodology significantly reduces testing cycles, costing only a fraction of the several-thousand-cycle tests typically required. The validity of this approach is successfully demonstrated through fatigue testing of 18Ni steel: the entire S–N curve is examined using the traditional fatigue test until a life of up to 107 cycles, and the indicated fatigue limit agrees well with the one directly determined through the self-heating method. Subsequently, this developed approach is applied to the fatigue analysis of shape memory alloys under complex loading, enabling the concurrent estimation of the limits of phase transformation-dominated low-cycle fatigue and high-cycle fatigue in the elastic regime on a single specimen. The results obtained align well with other supporting evidence.","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141929720","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

In-Plane Small-Deformation Equivalent Method for Kinematic Analysis of Tubular Miura-Ori 用于管状三浦-奥里运动学分析的平面内小变形等效法

IF 2.2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-07-30 DOI: 10.1007/s10338-024-00506-3

Xin Wang, Hui Chen, Xiuteng Ma, Lingyun Yao

{"title":"In-Plane Small-Deformation Equivalent Method for Kinematic Analysis of Tubular Miura-Ori","authors":"Xin Wang, Hui Chen, Xiuteng Ma, Lingyun Yao","doi":"10.1007/s10338-024-00506-3","DOIUrl":"https://doi.org/10.1007/s10338-024-00506-3","url":null,"abstract":"The tubular Miura-ori (TMO) structure has attracted much attention due to its excellent folding capability and rich application diversity. However, the existing theoretical research on origami structure is overly complex, and kinematic analysis rarely involves bending motion. In the present work, based on geometric kinematics, “equivalent deformation mechanism” is proposed to study the axial and bending motions of TMO under small in-plane deformations. Firstly, the geometric design is studied using the vector expression of creases. To simplify the kinematic analysis of axial motion, TMO deformation is equated to a change in angle. The proposed method is also applicable to bending motion, because both bending and axial motions can be described using similar deformation mechanisms. In addition, the accuracy of the proposed method is validated through numerical analysis, and the error between analytical and numerical solutions is sufficiently small for the folding angle (gamma in left[ {25^circ , 65^circ } right]). Finally, the numerical simulation is validated with mechanical experiments. Results show the effectiveness of the proposed method in describing the kinematic law of TMO structures in a simple way. This research sheds light on the kinematic analysis of other origami structures and establishes a theoretical framework for their applications in aerospace engineering, origami-based metamaterials, and robotics.","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141868903","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 Semi-analytical Model of Maximal First Principal Stress at Mode I Crack Tip 模式 I 裂纹尖端最大第一主应力的半分析模型

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-07-30 DOI: 10.1007/s10338-024-00494-4

Simiao Yu, Lixun Cai

引用次数: 0

Investigation on the Very High Cycle Fatigue Life of Titanium Alloys by Near-β Forging and Shot Peening 通过近β锻造和喷丸强化研究钛合金的超高循环疲劳寿命

IF 2.2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-07-30 DOI: 10.1007/s10338-024-00509-0

Qiangang Xu, Yonghui Chen, Kai Pan, Xingwei Xu, Fei Zhao, Kai Guo, Xiaotao Liu, Zhen Zhang

引用次数: 0

New Insight into the Flexoelectricity in the View of Mechanics of Materials: Prismatic Beams Subjected to Bending 材料力学视角下的柔电新见解：受弯曲影响的棱柱梁

IF 2 3区工程技术

Acta Mechanica Solida Sinica Pub Date : 2024-07-11 DOI: 10.1007/s10338-024-00495-3

Xu Yang, Lingling Chen, Shengyou Yang

{"title":"New Insight into the Flexoelectricity in the View of Mechanics of Materials: Prismatic Beams Subjected to Bending","authors":"Xu Yang, Lingling Chen, Shengyou Yang","doi":"10.1007/s10338-024-00495-3","DOIUrl":"10.1007/s10338-024-00495-3","url":null,"abstract":"<div>Flexoelectricity is a fascinating electromechanical phenomenon that occurs in non-homogeneously deformed dielectric materials. Unlike piezoelectricity, the flexoelectric effect is highly dependent on both the material scale and the deformation gradient. Although several theoretical models have been proposed to explain the mechanism of flexoelectricity, these models can be rather complicated for those who are interested in studying the topic. This paper aims to simplify the understanding of flexoelectricity by focusing on the bending behavior of a prismatic dielectric beam from a mechanics of material perspective. We avoid using complicated mathematical formulations based on continuum mechanics, including advanced tensor algebra and calculus of variations. Our formulation clearly explains how inhomogeneous deformations and material size affect the electromechanical coupling, changing the effective bending stiffness, deflection, and rotation angles of a bending beam. We hope this paper can help undergraduate students and researchers, who are unfamiliar with the electromechanical coupling in flexoelectricity, to develop an understanding of this phenomenon and encourage further research in this area.</div>","PeriodicalId":50892,"journal":{"name":"Acta Mechanica Solida Sinica","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141586825","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