International Journal of Applied Mechanics最新文献_第4页

An Investigation of Free Vibration Characteristics of a DFG-CNTRC Thin Laminated Shell in Thermal Environment 热环境下DFG-CNTRC薄层壳自由振动特性研究

3区工程技术

International Journal of Applied Mechanics Pub Date : 2023-10-27 DOI: 10.1142/s1758825124500200

Chaofeng Li, Xueyang Miao, Yuchen Pan, Kang Yang

引用次数: 0

Vibration investigation of circular graphene sheet with geometrical defect considering two-phase local/nonlocal theory exposed to the magnetic field 考虑两相局域/非局域理论的几何缺陷圆形石墨烯片在磁场下的振动研究

3区工程技术

International Journal of Applied Mechanics Pub Date : 2023-10-21 DOI: 10.1142/s175882512450008x

Pejman Ayoubi, Habib Ahmadi

{"title":"Vibration investigation of circular graphene sheet with geometrical defect considering two-phase local/nonlocal theory exposed to the magnetic field","authors":"Pejman Ayoubi, Habib Ahmadi","doi":"10.1142/s175882512450008x","DOIUrl":"https://doi.org/10.1142/s175882512450008x","url":null,"abstract":"In this work, the mixed local/nonlocal elasticity theory is developed for the investigation of the vibration of a circular graphene sheet with a structural defect located in a magnetic field. When graphene is placed in a magnetic field, the Lorentz force is applied to it, which is calculated using Maxwell’s equations. The insufficiency of Eringen’s nonlocal theory (ENT) caused some authors to employ the two-phase theory (TPT) to study nanostructures. Geometric imperfections can happen in the manufacturing process of graphene sheets. Lots of these imperfections can be modeled as a hole. So, in this work, an imperfection is considered as the centric hole. Governing equations, in Newtonian formulation, are extracted in the integrodifferential form. The boundary conditions are selected as clamped at inner and outer edges. To discretize the equation of motion we employ Galerkin’s approach. The solution is validated using a comparison study between the presented results and those that exist in the literature, and the accuracy of the suggested approach is verified. The effectiveness of the mixture parameter, magnetic field, radius of imperfection, and nonlocal parameter is examined on the natural frequency. The results exhibit that an increase in the mixture parameter and magnetic field increases the natural frequency of the graphene sheet.","PeriodicalId":49186,"journal":{"name":"International Journal of Applied Mechanics","volume":"129 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135463231","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 enhanced circumferential Winkler contact force model for cylindrical clearance joints 圆柱间隙连接的增强周向Winkler接触力模型

3区工程技术

International Journal of Applied Mechanics Pub Date : 2023-10-20 DOI: 10.1142/s1758825124500194

Huaibo Yao, Lei Liang, Wenlai Ma, Huibo Zhang, Yang Zhao

引用次数: 0

Thermodynamic constitutive model of the gas hydrate bearing sediments considering anisotropy 考虑各向异性的含气水合物沉积物热力学本构模型

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International Journal of Applied Mechanics Pub Date : 2023-10-20 DOI: 10.1142/s1758825124500170

Lei Liu, Bo Zhou, Xiuxing Zhu, Haijing Wang, Yun Huang

引用次数: 0

Acoustic characteristics of a plate silencer with a flexible back cavity under arbitrary boundary conditions 任意边界条件下柔性后腔板式消声器的声学特性

3区工程技术

International Journal of Applied Mechanics Pub Date : 2023-10-20 DOI: 10.1142/s1758825124500182

S. W. Yuan, J. X. Hou, H. C. Zhu, J. L. Liao

引用次数: 0

A Rate-temperature-dependent Visco-hyperelastic Constitutive Model for UD CF/PEEK Prepregs During a One-Step Hot Stamping Forming Process 一步热冲压成形过程中UD CF/PEEK预浸料的速率-温度相关粘-超弹性本构模型

3区工程技术

International Journal of Applied Mechanics Pub Date : 2023-10-19 DOI: 10.1142/s1758825124500078

Yan Lu, Yibo Li, Qiang Yue, Jingsong Liu, Yong Zhang, Lei Dong

{"title":"A Rate-temperature-dependent Visco-hyperelastic Constitutive Model for UD CF/PEEK Prepregs During a One-Step Hot Stamping Forming Process","authors":"Yan Lu, Yibo Li, Qiang Yue, Jingsong Liu, Yong Zhang, Lei Dong","doi":"10.1142/s1758825124500078","DOIUrl":"https://doi.org/10.1142/s1758825124500078","url":null,"abstract":"An anisotropic visco-hyperelastic constitutive model for rate-temperature-dependent deformation during one-step hot stamping forming simulation of unidirectional (UD) CF/PEEK prepregs is presented. This constitutive model is based on strain energy decomposition and a multiplicative decomposition of the deformation gradient. Two simple Maxwell models are used to characterize the viscoelastic behavior of the melted PEEK matrix and longitudinal shear deformation, respectively, and a shear invariant of [Formula: see text] is proposed to calculate the shear deformation. Moreover, the fiber stretching deformation is modeled by an anisotropic hyperelastic model. To obtain the model parameters, tensile tests at different strain rates and temperatures above the melt temperature of PEEK are performed on [Formula: see text], [Formula: see text], and [Formula: see text] CF/PEEK prepreg specimens, respectively. In parallel, the [0] 8 and [45] 8 curved beam specimens are experimentally fabricated to validate the constitutive model. The VUMAT subroutine is developed according to the proposed constitutive model and applied for a [Formula: see text] off-axis tensile simulation and hot-stamping forming simulation of CF/PEEK prepregs. The experimental and simulation results show that the materials flow, distribution of strain and stress, forming defects (wrinkles and overlap) of CF/PEEK curved beam can be captured by the proposed model.","PeriodicalId":49186,"journal":{"name":"International Journal of Applied Mechanics","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135667439","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

Peridynamics–FEM coupling for interfacial delamination effected by vertical crack density in thermal barrier coatings 垂直裂纹密度对热障涂层界面分层影响的周动力学-有限元耦合

3区工程技术

International Journal of Applied Mechanics Pub Date : 2023-10-14 DOI: 10.1142/s1758825124500054

Han Dong, Han Wang, Zhenwei Cai, Weizhe Wang, Yingzheng Liu

引用次数: 0

Vibration Instability of a Rotor in Axial-Field Permanent Magnet Motors with a Foundation Movement 具有基础运动的轴向磁场永磁电机转子的振动不稳定性

3区工程技术

International Journal of Applied Mechanics Pub Date : 2023-10-14 DOI: 10.1142/s1758825124500042

Chunhua Xia, Shiyu Wang, Jixiang Wang, Zhenhang Wei

{"title":"Vibration Instability of a Rotor in Axial-Field Permanent Magnet Motors with a Foundation Movement","authors":"Chunhua Xia, Shiyu Wang, Jixiang Wang, Zhenhang Wei","doi":"10.1142/s1758825124500042","DOIUrl":"https://doi.org/10.1142/s1758825124500042","url":null,"abstract":"This paper investigates the effects of a foundation movement on the vibration instability of axial-field permanent magnet motors (AFPMM). Different from previous studies focusing on the effects of the rotor’s rotation on its vibration instability, this paper introduces a revolution around a space axis as the foundation movement and investigates its effect on the vibration characteristics of the rotor. For an annular rotor with this foundation movement and a rotation around an axis passing through its own geometrical center, a dynamic model is established in this paper. Magnet-field-synchronous frame is introduced to describe the out-of-plane displacement. Hamilton’s principle and Galerkin method are involved to obtain dynamic mode. Closed-form expressions of eigenvalues and the boundaries of flutter and divergent instabilities are determined. The analytical results claim that the instabilities can be suppressed. Particularly, the divergent instabilities can even be eliminated by adjusting combinations of parameters. To verify the results, the stability analyses and numerical calculations regarding the revolution are given for a sample AFPMM revolving around a space axis at different speeds. Based on these analytical boundaries, the unstable regions of a sample motor with different parameter combinations are plotted in terms of foundation movement, which can be used to suppress the vibration instabilities with the design of parameters such as rotation speed, web thickness, magnetization thickness, air-gap length and remanence. Six states of instabilities are summarized as a guidance to determine the range of the stable operation of the motor.","PeriodicalId":49186,"journal":{"name":"International Journal of Applied Mechanics","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135767365","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

Fractional-Order Rate-Dependent Piezoelectric Thermoelasticity Theory Based on new Fractional Derivatives and its Application in Structural Transient Responses Analysis of Smart Piezoelectric Composite Laminates 基于新型分数阶导数的分数阶速率相关压电热弹性理论及其在智能压电复合材料层合板结构瞬态响应分析中的应用

3区工程技术

International Journal of Applied Mechanics Pub Date : 2023-10-13 DOI: 10.1142/s1758825124500169

Huili Guo, Fulin Shang, Tianhu He

引用次数: 0

Modeling and analysis of a thermo-electro-magneto-viscoelastic actuator 热-电磁-粘弹性作动器的建模与分析

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International Journal of Applied Mechanics Pub Date : 2023-10-13 DOI: 10.1142/s1758825124500157

Asesh Kumar Patra, Aman Khurana, Deepak Kumar

引用次数: 0