Acta Mechanica最新文献_第4页

On the thermal bending behavior of porous cross-ply laminated plates using an improved first-order shear deformation theory 用改进的一阶剪切变形理论研究多孔交叉层合板的热弯曲行为

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-06-07 DOI: 10.1007/s00707-025-04369-8

Muayad A. Rajeh, Salah U. Al-Dulaijan, Fouad Bourada, Mohammed A. Al-Osta, Abdelouahed Tounsi, Murat Yaylacı, Abdeldjebbar Tounsi

{"title":"On the thermal bending behavior of porous cross-ply laminated plates using an improved first-order shear deformation theory","authors":"Muayad A. Rajeh, Salah U. Al-Dulaijan, Fouad Bourada, Mohammed A. Al-Osta, Abdelouahed Tounsi, Murat Yaylacı, Abdeldjebbar Tounsi","doi":"10.1007/s00707-025-04369-8","DOIUrl":"10.1007/s00707-025-04369-8","url":null,"abstract":"<div><p>This article investigates the stresses and displacements of porous anti-symmetric cross-ply laminated plates under nonlinear thermal load applied along the thickness of the plate. Innovatively, this study considers three porosity distribution models and utilizes an improved first-order shear deformation theory (FSDT) with four variables, as opposed to five in conventional FSDT, to conduct the thermal flexural analysis of the plate. Furthermore, the present theory has a parabolic shear stresses distribution across the thickness, so the need for a shear correction factor is removed. The plate’s top and bottom boundary conditions are satisfied. The plate is simply supported on all its edges. The governing differential equations (GDEs) and the boundary conditions were obtained using the virtual work principle. Navier’s procedure was utilized to derive the analytical solutions. The present theory’s validity is attested by the comparison with classical, first-order, higher-order, quasi-3D, and exact elasticity plate theories’ results. The influence of certain parameters, such as porosity volume fraction and porosity distribution models, on the plate’s flexural response is investigated. The results show that the thermally induced laminated plate’s response is most affected by porosity model 1. While the effects of porosity model 3 are fairly negligible in comparison, except for planar normal stresses and transverse shear stresses. Moreover, the effect of porosity becomes more significant as the porosity volume fraction increases.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 7","pages":"4177 - 4195"},"PeriodicalIF":2.9,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162739","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

Optimized energy bounds on mixed-mode elastic constants of unidirectional transversely isotropic multicomponent materials 单向横向各向同性多组分材料混合模弹性常数的优化能量界

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-06-06 DOI: 10.1007/s00707-025-04388-5

Duc-Chinh Pham, Lam-Dong Vu

引用次数: 0

Fractional photo-thermoelasticity of microelongated nanostructure semiconductors medium with hydrodynamic interactions 具有水动力相互作用的微细长纳米结构半导体介质的分数光热弹性

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-06-06 DOI: 10.1007/s00707-025-04393-8

M. Adel, Eman Ibrahim, Shreen El-Sapa, Alaa A. El-Bary, Khaled Lotfy

{"title":"Fractional photo-thermoelasticity of microelongated nanostructure semiconductors medium with hydrodynamic interactions","authors":"M. Adel, Eman Ibrahim, Shreen El-Sapa, Alaa A. El-Bary, Khaled Lotfy","doi":"10.1007/s00707-025-04393-8","DOIUrl":"10.1007/s00707-025-04393-8","url":null,"abstract":"<div><p>This study investigates the propagation of photo-thermoelastic waves in a hydrodynamic nonlocal semiconductor medium incorporating microelongation effects and governed by a fractional-order heat conduction model. The theoretical framework is based on coupled differential equations describing carrier density, thermal conduction, elastic deformation, and heat diffusion. The governing equations in one dimension (1D) include the fractional-order carrier density equation and the fractional heat conduction law, where the Caputo fractional derivative is used to model memory-dependent thermal behavior. By applying the normal mode analysis technique, we derive analytical solutions for various physical fields under prescribed boundary conditions. A comprehensive wave propagation analysis is conducted to assess the influence of the fractional order and nonlocal parameters. The results highlight the critical roles of fractional calculus and nonlocality in accurately describing semiconductor wave behavior, particularly in microstructured and thermally sensitive environments. </p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 7","pages":"4157 - 4175"},"PeriodicalIF":2.9,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162641","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

Internal resonance of axially moving functionally graded carbon nanotube-reinforced composite plates 轴向运动功能梯度碳纳米管增强复合材料板的内部共振

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-06-05 DOI: 10.1007/s00707-025-04367-w

Hong Ying Li, Ming Yao Zhang, Qin Jing Ji, Jian Li

引用次数: 0

A comparative study of continuum-mechanics-based and structural-mechanics-based absolute nodal coordinate formulations for quadrature shell elements 基于连续力学和基于结构力学的正交壳单元绝对节点坐标公式的比较研究

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-06-05 DOI: 10.1007/s00707-025-04379-6

Zixuan He, Huayi Li, Hongzhi Zhong

{"title":"A comparative study of continuum-mechanics-based and structural-mechanics-based absolute nodal coordinate formulations for quadrature shell elements","authors":"Zixuan He, Huayi Li, Hongzhi Zhong","doi":"10.1007/s00707-025-04379-6","DOIUrl":"10.1007/s00707-025-04379-6","url":null,"abstract":"<div><p>In this paper, a structural-mechanics-based shell element is developed by combining the absolute nodal coordinate formulation and the weak-form quadrature element method. Incorporating simplifying assumptions, the elastic strain energy formulation for shells based on three-dimensional continuum mechanics degenerates into the one based on structural mechanics approach. The plane stress assumption and the constant thickness stress assumption are introduced to modify the constitutive relations between in-plane and through-thickness stresses and strains, addressing the Poisson locking issue. A comprehensive comparison between the structural-mechanics-based and the continuum-mechanics-based formulations for quadrature shell elements is made. Examples including static, post-buckling, and dynamic analysis of conventional thin and moderately thick shell structures, as well as nonconventional shell structures, are presented. Elements of either formulation are capable of accurately modeling shear deformable shells undergoing large displacements and rotations. Nevertheless, quadrature elements of each formulation exhibit peculiar strengths and weaknesses in terms of computational efficiency and practical applicability.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 8","pages":"4249 - 4275"},"PeriodicalIF":2.9,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145142563","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 coupled algorithm for numerical analysis of an undermined rock massif stress–strain state 破坏岩体应力-应变状态数值分析的耦合算法

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-06-05 DOI: 10.1007/s00707-025-04394-7

Michael A. Zhuravkov, Mikhail A. Nikolaitchik, Nikita M. Klimkovich

{"title":"A coupled algorithm for numerical analysis of an undermined rock massif stress–strain state","authors":"Michael A. Zhuravkov, Mikhail A. Nikolaitchik, Nikita M. Klimkovich","doi":"10.1007/s00707-025-04394-7","DOIUrl":"10.1007/s00707-025-04394-7","url":null,"abstract":"<div><p>The purpose of the research is to develop a coupled algorithm of numerical modeling for solving practical problems of mechanics, in the case when there is a transition of a continuous medium part into a discrete one. As an example, the article considers the solution of the actual geo-mechanics problem on stress–strain state of the undermined rock massif from the mining depth to the earth's surface modeling. This problem is characterized by the fact that a part of the rock massif in the vicinity of the undermined space transforms into a discrete (block) state, while the rest of the rock massif remains solid. A special feature of the developed algorithm is the introduction of special type block elements in the form of elastic or viscoelastic bonds system into the numerical modeling procedure based on the finite element method. In the course of the study, it was shown that when mining depths are large, starting from a certain depth, their impact on the earth's surface decreases. This fact is confirmed by the results of field observations, but it is not confirmed by calculations according to engineering methodologies. The use of the developed approach of numerical modeling allows to model geo-mechanical processes throughout the entire depth of the rock massif during underground mining operations more correctly and adequately.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 7","pages":"4123 - 4137"},"PeriodicalIF":2.9,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161840","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

Coupling of bending and damping with axial motion for beams modeled with arbitrary Lagrangian–Eulerian formulation 用任意拉格朗日-欧拉公式建模的梁的弯曲和阻尼与轴向运动的耦合

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-06-04 DOI: 10.1007/s00707-025-04365-y

Konstantina Ntarladima, Michael Pieber, Johannes Gerstmayr

{"title":"Coupling of bending and damping with axial motion for beams modeled with arbitrary Lagrangian–Eulerian formulation","authors":"Konstantina Ntarladima, Michael Pieber, Johannes Gerstmayr","doi":"10.1007/s00707-025-04365-y","DOIUrl":"10.1007/s00707-025-04365-y","url":null,"abstract":"<div><p>This work investigates the influence of terms representing the coupling of bending stiffness and dissipative effects with axial motion for highly flexible beams modeled with an arbitrary Lagrangian–Eulerian (ALE) formulation. In the current work, axially moving beams undergoing large deformations are numerically modeled using an absolute nodal coordinate formulation (ANCF) and an ALE framework. In the resulting beam element model, an ANCF beam is extended by an independent axial (Eulerian) coordinate which models the axial motion. The influence of terms dependent on the axial coordinate appearing in the equations of motion is the focus of the present investigation. It is shown that the role of these terms is crucial in modeling problems involving large bending of axially moving beams. The consistency of the investigated ALE modeling with a conventional Lagrangian modeling is verified by comparisons of results obtained by reproducing numerical examples with the two modeling approaches. An exclusion of the axial-coordinate-dependent terms from the model highlights their significance in ALE modeling of beams with large bending deformations. Finally, obtained results show agreement to an analytical solution and a semi-analytical solution derived for the quasi-static and dynamic numerical example, respectively.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 7","pages":"4087 - 4105"},"PeriodicalIF":2.9,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00707-025-04365-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161815","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

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-06-04 DOI: 10.1007/s00707-025-04354-1

Hans Irschik, Michael Krommer

引用次数: 0

Nonlocal strain gradient model for thermoelastic damping in small-scale rectangular plate resonators with nonlocal dual-phase-lag heat conduction 非局部双相滞后热传导小尺度矩形板腔热弹性阻尼的非局部应变梯度模型

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-06-03 DOI: 10.1007/s00707-025-04358-x

Baraa Mohammed Yaseen, Rafid Jihad Albadr, Waam Mohammed Taher, Subhash Chandra, N. Beemkumar, P. Vijaya Kumar, Manoj Kumar, Parveen Kumar, Mariem Alwan, Mahmood Jasem Jawad, Hiba Mushtaq

{"title":"Nonlocal strain gradient model for thermoelastic damping in small-scale rectangular plate resonators with nonlocal dual-phase-lag heat conduction","authors":"Baraa Mohammed Yaseen, Rafid Jihad Albadr, Waam Mohammed Taher, Subhash Chandra, N. Beemkumar, P. Vijaya Kumar, Manoj Kumar, Parveen Kumar, Mariem Alwan, Mahmood Jasem Jawad, Hiba Mushtaq","doi":"10.1007/s00707-025-04358-x","DOIUrl":"10.1007/s00707-025-04358-x","url":null,"abstract":"<div><p>Given the critical role of thermoelastic damping (TED) in micro/nanoscale structures, precise modeling of this phenomenon can greatly enhance their operational efficiency. One of the main factors influencing the accurate modeling of thermomechanical behavior in tiny structures is accounting for the size effect in the constitutive and heat transfer equations. Based on the frequency approach, the present study seeks to offer an exhaustive formulation for determining TED value in tiny rectangular plates by integrating two robust scale-dependent models: nonlocal strain gradient theory (NSGT) and nonlocal dual-phase-lag (NDPL) heat equation. To achieve this, the motion and heat transfer equations are derived using NSGT and NDPL model. Subsequently, a one-term expression for TED is obtained by applying the definition of damping within the frequency approach framework. The numerical results section presents multiple examples to investigate how different factors, such as scale parameters in NSGT and NDPL model, geometry, boundary conditions, and material, affect TED. The outcomes reveal that the sensitivity of TED to the implementation of NSGT and NDPL model in dimensions comparable to the characteristic lengths of the material in the structural or thermal domains is meaningful and cannot be overlooked.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 7","pages":"4065 - 4086"},"PeriodicalIF":2.9,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161644","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

Inverse design of two-dimensional layered phononic crystal structures for vibration attenuation using the LightGBM algorithm 基于LightGBM算法的二维分层声子晶体结构减振逆设计

IF 2.9 3区工程技术

Acta Mechanica Pub Date : 2025-06-02 DOI: 10.1007/s00707-025-04368-9

Chunfeng Zhao, Tian Zhang, Fan Chu, Qiaoyun Wu, Liang Huang

{"title":"Inverse design of two-dimensional layered phononic crystal structures for vibration attenuation using the LightGBM algorithm","authors":"Chunfeng Zhao, Tian Zhang, Fan Chu, Qiaoyun Wu, Liang Huang","doi":"10.1007/s00707-025-04368-9","DOIUrl":"10.1007/s00707-025-04368-9","url":null,"abstract":"<div><p>Phononic crystals are periodic artificial composite structures that have gained significant attention for their potential to control wave propagation, offering solutions for vibration and noise reduction. This study proposes an innovative optimal design method for the two-dimensional layered phononic crystal structure, combining light gradient-boosting machine (LightGBM) and an improved genetic algorithm. Firstly, LightGBM is employed to predict the band gap of the phononic crystal, treating the structural arrangement vectors as categorical features. Hyperparameter tuning is performed using simulated annealing, achieving a prediction accuracy with an error of less than 2% and requiring only 1/3134 of the computational time compared to traditional finite element methods. Secondly, a genetic algorithm with an elite retention strategy is integrated into the design method. Taking the environmental vibration caused by subway operation as a case study, the fitness function is optimized based on the bandgap width. A dataset is generated with the corresponding structural bandgap covering the 30 ~ 40 Hz frequency range. Finally, finite element analysis is conducted on the optimized structure, confirming that the bandgap characteristics are consistent with expectations. This approach offers an efficient and intelligent solution for the optimization of multiple phononic crystal designs.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"236 7","pages":"4051 - 4064"},"PeriodicalIF":2.9,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161231","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