Acta Mechanica最新文献

Enhancement of MITC3+ flat shell element using curvature corrections

IF 2.3 3区工程技术

Acta Mechanica Pub Date : 2025-04-02 DOI: 10.1007/s00707-025-04284-y

Son H. Nguyen, Thuan N.-T. Ho, Qui X. Lieu, Tiendung Vu, Trung Nguyen-Thoi

引用次数: 0

Wave packet propagation through a slab using the telegrapher’s equation

IF 2.3 3区工程技术

Acta Mechanica Pub Date : 2025-04-01 DOI: 10.1007/s00707-025-04286-w

Marco Nizama, Esteban E. Riquelme, Sergio E. Garrido, Fabian Braschi, Manuel O. Cáceres

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A natural requirement for objective corotational rates—on structure-preserving corotational rates

IF 2.3 3区工程技术

Acta Mechanica Pub Date : 2025-04-01 DOI: 10.1007/s00707-025-04249-1

Patrizio Neff, Sebastian Holthausen, Sergey N. Korobeynikov, Ionel-Dumitrel Ghiba, Robert J. Martin

{"title":"A natural requirement for objective corotational rates—on structure-preserving corotational rates","authors":"Patrizio Neff, Sebastian Holthausen, Sergey N. Korobeynikov, Ionel-Dumitrel Ghiba, Robert J. Martin","doi":"10.1007/s00707-025-04249-1","DOIUrl":"10.1007/s00707-025-04249-1","url":null,"abstract":"<div><p>We investigate objective corotational rates satisfying an additional, physically plausible assumption. More precisely, we require for </p><div><div><span>$$begin{aligned} frac{textrm{D}^{circ }}{textrm{D}t}[B] = mathbb {A}^{circ }(B).D end{aligned}$$</span></div></div><p>that the characteristic stiffness tensor <span>(mathbb {A}^{circ }(B))</span> is positive-definite. Here, <span>(B = F , F^T)</span> is the left Cauchy–Green tensor, <span>(frac{textrm{D}^{circ }}{textrm{D}t})</span> is a specific objective corotational rate, <span>(D = {{,textrm{sym},}}, D_xi v)</span> is the Eulerian stretching and <span>(mathbb {A}^{circ }(B))</span> is the corresponding induced characteristic fourth-order stiffness tensor. Well-known corotational rates like the Zaremba–Jaumann rate, the Green–Naghdi rate and the logarithmic rate belong to this family of “positive” corotational rates. For general objective corotational rates <span>(frac{textrm{D}^{circ }}{textrm{D}t})</span>, we determine several conditions characterizing positivity. Among them is an explicit condition on the material spin-functions of Xiao, Bruhns and Meyers [84]. We also give a geometrical motivation for invertibility and positivity of <span>( mathbb {A}^{circ }(B))</span> and highlight the structure-preserving properties of corotational rates that distinguish them from more general objective stress rates. Applications of this novel concept are indicated.\u0000</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 4","pages":"2657 - 2689"},"PeriodicalIF":2.3,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00707-025-04249-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809110","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

Thermoelectromechanical coupling of conical dielectric elastomer under polarization saturation

IF 2.3 3区工程技术

Acta Mechanica Pub Date : 2025-04-01 DOI: 10.1007/s00707-025-04308-7

Shun Li, Guanghong Miao, Xiangyu Chu, Cheng Yuan, Silu Zhao, Shiqiang Zhu

引用次数: 0

Neural network-based quasi-static modeling using Cosserat theory and proportional-integral control of ferromagnetic continuum robot

IF 2.3 3区工程技术

Acta Mechanica Pub Date : 2025-03-29 DOI: 10.1007/s00707-025-04304-x

Pouya Mallahi Kolahi, Moharam Habibnejad Korayem

{"title":"Neural network-based quasi-static modeling using Cosserat theory and proportional-integral control of ferromagnetic continuum robot","authors":"Pouya Mallahi Kolahi, Moharam Habibnejad Korayem","doi":"10.1007/s00707-025-04304-x","DOIUrl":"10.1007/s00707-025-04304-x","url":null,"abstract":"<div><p>Ferromagnetic continuum robots, characterized by their remarkable flexibility, offer significant potential for advanced medical applications. However, the nonlinear behavior of these robots requires complex modeling, which incurs high computational costs, and presents significant challenges in developing precise, real-time controllers. Ensuring accuracy and computational efficiency in critical procedures, such as minimally invasive surgery, is challenging, as precise control of the robot is essential. Overcoming these challenges requires innovative modeling and control strategies that leverage the unique properties of these robots while maintaining stability and responsiveness in medical environments. To address these challenges and considering the nature of the system, including its low inertia and slow system behavior, the system is treated as quasi-static. Additionally, an artificial neural network approach is employed for modeling the ferromagnetic continuum robot. The data required for training the neural network are collected using the Cosserat theory. Additionally, considering the quasi-static nature of the system, a proportional-integral controller will be used to control the tip position of the robot. To evaluate the performance of the Cosserat theory for calculating the deformation of the robot and the proposed controller, the results obtained from the simulations of trajectory tracking for various paths are compared with experimental data, showing an acceptable agreement with the experimental results.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 4","pages":"2615 - 2630"},"PeriodicalIF":2.3,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809185","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

Hygrothermoelastic fracture behavior of a nanocylinder with an edge circumferential crack via dual-phase-lag theory

IF 2.3 3区工程技术

Acta Mechanica Pub Date : 2025-03-29 DOI: 10.1007/s00707-025-04313-w

Nagesh Dhore, Lalsingh Khalsa, Vinod Varghese

引用次数: 0

Reflection and transmission of thermoelastic waves under an external magnetic field based on GN-II heat conduction and dipolar gradient elasticity 基于 GN-II 热传导和双极梯度弹性的热弹性波在外磁场下的反射和传输

IF 2.3 3区工程技术

Acta Mechanica Pub Date : 2025-03-28 DOI: 10.1007/s00707-025-04292-y

Ying Li, Yueqiu Li, Hong Wang, Changda Wang

引用次数: 0

Residual stress analysis in strain-hardened annular disks with arbitrary thickness and density under rotational autofrettage 任意厚度和密度的应变硬化环形盘在旋转自动刃磨条件下的残余应力分析

IF 2.3 3区工程技术

Acta Mechanica Pub Date : 2025-03-28 DOI: 10.1007/s00707-025-04307-8

Avinash Chetry

{"title":"Residual stress analysis in strain-hardened annular disks with arbitrary thickness and density under rotational autofrettage","authors":"Avinash Chetry","doi":"10.1007/s00707-025-04307-8","DOIUrl":"10.1007/s00707-025-04307-8","url":null,"abstract":"<div><p>Autofrettage is a cold metal forming process that aims to improve the load-bearing capacity and delay the crack initiation for thick-walled annular disks/cylinders. The current study presents numerical solution of stress distribution during the loading and unloading stage subjected to rotational autofrettage for uniform and non-uniform annular disks. The analysis assumed the plane stress condition, von Mises yield criterion, and polynomial strain hardening behavior. The stress distribution during loading and after unloading has been demonstrated for a typical SS304 uniform disk and later validated the results using a 2D FEM model in ABAQUS software. A comparative analysis has been conducted to understand the pressure-bearing capacity in second-stage loading between numerical solutions based on the von Mises yield criterion incorporating perfectly plastic hardening behavior and the proposed model. Furthermore, the stress distribution has been evaluated for non-uniform thickness and density rotating annular disks, and numerical experimentation has been conducted to underscore the importance of profile-specific strategies to induce desired beneficial compressive residual stress in the inner region of the disk.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 4","pages":"2599 - 2613"},"PeriodicalIF":2.3,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00707-025-04307-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809206","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

Dynamic analysis of geometrically imperfect sandwich beams subjected to moving load and a porosity-dependent GPLRC core

IF 2.3 3区工程技术

Acta Mechanica Pub Date : 2025-03-28 DOI: 10.1007/s00707-025-04245-5

Shiying Zhang, Shuna Zhang, Guotai Weng, Zhixin Wu

引用次数: 0

High-order stress theory for solids: a more generalized strain gradient theory

IF 2.3 3区工程技术

Acta Mechanica Pub Date : 2025-03-27 DOI: 10.1007/s00707-025-04290-0

Yunbiao Li, Deyi Fu, Lei Jin, Shiqiao Gao

{"title":"High-order stress theory for solids: a more generalized strain gradient theory","authors":"Yunbiao Li, Deyi Fu, Lei Jin, Shiqiao Gao","doi":"10.1007/s00707-025-04290-0","DOIUrl":"10.1007/s00707-025-04290-0","url":null,"abstract":"<div><p>This paper seeks to address the size dependence of microstructure by defining a characteristic scale vector to characterize the size effect in materials. It introduces high-order stress moments and high-order momentum moment as foundational concepts. Based on these ideas, we propose a high-order stress theory for solids that integrates a complete second-order displacement gradient, as opposed to solely incorporating a rotation gradient or a strain gradient. This methodology enhances the high-order stress theory, rendering it a more comprehensive and generalized framework. Under certain conditions, this theory can be degenerated into other models that elucidate the size effect, indicating that the high-order stress theory has a wider applicability and is not limited by its own ideal assumptions or prerequisites, unlike other existing theories. The high-order stress theory presented in this paper is applicable not only in the field of micromechanics but also in multi-field analyses. To exemplify its utility, we investigate the flexoelectric effect in dielectric materials using the proposed high-order theory. We compute parameters such as electric field intensity and structural response under various deformation conditions, including tension, bending, shearing, and torsion. Furthermore, we conduct electromechanical coupling experiments on PZT plates within these deformation scenarios. The analysis of the experimental results substantiates the efficacy of the high-order theory.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 4","pages":"2741 - 2763"},"PeriodicalIF":2.3,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809201","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