Mechanics Research Communications最新文献

The implementation of M-integral in cross-scale correlation analysis of porous materials 多孔材料跨尺度相关分析中 M 积分的应用

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2024-10-22 DOI: 10.1016/j.mechrescom.2024.104337

Junling Hou , Jiahui Hu , Xicheng Cao , Xingming Peng , Qun Li , Chunguang Wang

{"title":"The implementation of M-integral in cross-scale correlation analysis of porous materials","authors":"Junling Hou , Jiahui Hu , Xicheng Cao , Xingming Peng , Qun Li , Chunguang Wang","doi":"10.1016/j.mechrescom.2024.104337","DOIUrl":"10.1016/j.mechrescom.2024.104337","url":null,"abstract":"<div><div>The damage analysis caused by mesoscopic pores has attracted much attention in the development and application of porous materials. In this study, a novel application of <em>M</em>-integral is presented to establish a cross-scale correlation analysis of damaged porous materials. The multiscale damage analysis featured here can be proposed in two main steps. In detail, the first step is to construct a quantitative relationship between <em>M</em>-integral and porosity, where the values of <em>M</em>-integral for different porosity are calculated numerically. Subsequently, it applies the variation of <em>M</em>-integral with the material damage represented by a decrease in effective elastic modulus, and a cross-scale correlation between porosity and effective elastic modulus of porous material can be provided. In addition, an example is discussed to illustrate the specific application of this bridging parameter <em>M</em>-integral. The results confirm that <em>M</em>-integral can be an effective parameter bridging mesoscopic porosity and macroscopic damage, and is expected benefit to propose a convenient damage model of porous material. The findings should be of value in investigating the multiscale damage analysis of porous materials.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Development of a methodology for prediction and calibration of parameters of DEM simulations based on machine learning 开发基于机器学习的预测和校准 DEM 模拟参数的方法

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2024-10-01 DOI: 10.1016/j.mechrescom.2024.104336

Nasr-Eddine Bouassale, Mohamed Sallaou, Abdelmajid Aittaleb

{"title":"Development of a methodology for prediction and calibration of parameters of DEM simulations based on machine learning","authors":"Nasr-Eddine Bouassale, Mohamed Sallaou, Abdelmajid Aittaleb","doi":"10.1016/j.mechrescom.2024.104336","DOIUrl":"10.1016/j.mechrescom.2024.104336","url":null,"abstract":"<div><div>This research work aims to develop a robust methodology for the global estimation of interaction parameters based on machine learning, applicable to the discrete element method (DEM) in the study of granular materials. The specific objectives include establishing a theoretical framework that relates the interaction micro-parameters with the macro-parameters and the physical behaviour of the material; performing DEM simulations for different material parameters; developing a machine learning-based model for global parameter estimation; and consolidating the methodology for obtaining micro-parameters for a given material and behaviour. The methodology will be applied specifically to the case of dry copper ore, evaluating its limitations and the possibility of extension to materials with other characteristics. This approach does not consider direct experimental tests, but focuses on the characterisation of the relationship between the input parameters of the material and its response through simulations, validating the response and sensitivity of the model in its different stages. The methodology is expected to allow the systematic estimation of interaction properties for a DEM model, considering micro-parameter duplicities and their global selection, aspects little addressed in the literature. The final verification includes mechanisms and key questions that facilitate future modifications and improvements, allowing its application to materials of different characteristics beyond the specific case study.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142446261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Vibration response of sandwich plate reinforced by GPLs/GOAM 用 GPL/GOAM 加固的夹层板的振动响应

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2024-10-01 DOI: 10.1016/j.mechrescom.2024.104334

Vahid Motalebi, Mehdi Mohammadimehr, Fatemeh Bargozini

{"title":"Vibration response of sandwich plate reinforced by GPLs/GOAM","authors":"Vahid Motalebi, Mehdi Mohammadimehr, Fatemeh Bargozini","doi":"10.1016/j.mechrescom.2024.104334","DOIUrl":"10.1016/j.mechrescom.2024.104334","url":null,"abstract":"<div><div>Due to the improvement in the quality of life for people and the increase in the safety of structures, various industries, especially the transportation and construction industry, need to structures with lower lightweight and higher strength. Increasing the strength of structures with decreasing their weight is the motivation for studying composite sandwich structures reinforced with various types of reinforcements and different porous cores. Researchers' motivation is to try to improve the quality of these structures by integrating multiple materials in sandwich composite structures. This motivation has led to the vibration analysis of a rectangular sandwich plate with a porous core and composite face sheet reinforced by graphene platelets (GPLs) and graphene acoustic origami metamaterial (GOAM). This research hypothesizes that the structure is one fabric, and each layer is completely connected to the next and previous layers. On the other hands, it hypothesizes that the delamination phenomenon for each layer does not occur. Also, the reinforcements are completely uniformly distributed in the face sheet layer. Also, the effects of the shear deformation are considered based on the refined third-order shear deformation theory (RTSDT). There are only four unknown functions compared to other theories, while other shear deformation theories require five functions. In this study, three types of porosity distribution are hypothesized and investigated. It shows that the effect of the second type of porosity distribution on the natural frequency is more significant than the other two types. Also, the effect of a higher (<em>n</em> > 2) power index on the aspect ratio is negligible, while it is noticeable for a lower power index. Moreover, it is seen that by enhancing the weight fraction of GPL/GOAM, frequency increases because of increasing the stiffness of structures.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142358931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Ratcheting assessment of additively manufactured SS316 alloys at elevated temperatures within the dynamic strain aging domain 在动态应变老化域内对高温条件下添加制造的 SS316 合金进行梯度评估

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2024-10-01 DOI: 10.1016/j.mechrescom.2024.104335

M. Servatan , M. Karimi , S. M. Hashemi , A. Varvani-Farahani

{"title":"Ratcheting assessment of additively manufactured SS316 alloys at elevated temperatures within the dynamic strain aging domain","authors":"M. Servatan , M. Karimi , S. M. Hashemi , A. Varvani-Farahani","doi":"10.1016/j.mechrescom.2024.104335","DOIUrl":"10.1016/j.mechrescom.2024.104335","url":null,"abstract":"<div><div>The present study has evaluated the accumulation of plastic strain in additively manufactured (AM) stainless steel 316 samples undergoing asymmetric loading cycles at elevated temperature range where the dynamic strain aging (DSA) phenomenon occurred. The ratcheting response of AM steel samples were assessed through the use of the combined isotropic-kinematic hardening framework. The dynamic strain aging was introduced into the dynamic recovery term of the Ahmadzadeh-Varvani (A-V) kinematic hardening rule by an exponential function ψ(<em>p, T</em>). This function enabled the hardening framework to evaluate the ratcheting of AM steel samples at operating temperatures within the DSA domain. The DSA temperature range for AM SS316 samples fell between 700 K to 1140 K. Within this temperature domain, the interaction between solute atoms and dislocations led to an increase in material strength and suppressed the magnitude of ratcheting over the loading cycles. The influence of DSA on the backstress evolution and the yield surfaces translated in the deviatoric stress space and their subsequent influence on the ratcheting of samples using the A-V model were further discussed. The predicted ratcheting curves at the DSA temperature domain were found in close agreement with those of measured values.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142425225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Transformation of surface H-forces in high grade elasticity 高等级弹性中表面 H 力的变化

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2024-09-17 DOI: 10.1016/j.mechrescom.2024.104331

Roberto Fedele

{"title":"Transformation of surface H-forces in high grade elasticity","authors":"Roberto Fedele","doi":"10.1016/j.mechrescom.2024.104331","DOIUrl":"10.1016/j.mechrescom.2024.104331","url":null,"abstract":"<div><p>The expression of the elastic energy, postulated for a given material, specifies through the principle of virtual work which external loadings turn out to be admissible. For the elastic bodies, the energy of which depends on the gradients of the placement higher than <span><math><mrow><mo>(</mo><mi>H</mi><mo>+</mo><mn>1</mn><mo>)</mo></mrow></math></span> (or, equivalently, on the derivatives of the deformation gradient higher than <span><math><mi>H</mi></math></span>), external force densities can be prescribed over the boundary surface, which do work on the <span><math><mi>H</mi></math></span>-th derivative of the virtual displacements along the normal direction. Such generalized forces with <span><math><mrow><mi>H</mi><mo>=</mo><mn>1</mn><mo>,</mo><mn>2</mn><mspace></mspace></mrow></math></span> have been dealt with in the literature, referred to as <em>double</em> and <em>triple forces</em>: when <span><math><mi>H</mi></math></span> is increased, however, the analytical evaluation of these work terms may become prohibitive. Each Eulerian <span><math><mi>H</mi></math></span>-force density of this kind, acting on the current boundary surface, turns out to be equivalent to a set of diverse actions defined in the Lagrangian configuration. These actions include: (i) surface terms doing work on the virtual displacement vector; (ii) surface terms doing work on the higher order derivatives of the virtual displacement along the normal direction; (iii) edge terms, doing work on the virtual displacement or on its higher order gradients, which may be further reduced. In this study, a recursive algorithm is utilized to generate all these Lagrangian contributions for any <span><math><mi>H</mi></math></span>. Such an approach rests on the binomial expansion of the tensor products of complementary surface projectors, symmetrized in the work duality, and on the integration by parts combined with the generalized divergence theorem.</p></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0093641324000910/pdfft?md5=b956b1a0e91599b0aca7aa16be779ade&pid=1-s2.0-S0093641324000910-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142240970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Study of circumferential SH-wave interaction with a piezoelectric cylinder having pre-stressed viscoelastic imperfect coating 研究周向 SH 波与带有预应力粘弹性不完美涂层的压电圆柱体的相互作用

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2024-09-07 DOI: 10.1016/j.mechrescom.2024.104323

Mohammad Arif, Parvez Alam

引用次数: 0

Hybrid finite element theory in dynamic analysis of an imperfect plate 不完全板动态分析中的混合有限元理论

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2024-09-04 DOI: 10.1016/j.mechrescom.2024.104324

Hadia Yahiaoui, Aouni Lakis, Mohammad Toorani

{"title":"Hybrid finite element theory in dynamic analysis of an imperfect plate","authors":"Hadia Yahiaoui, Aouni Lakis, Mohammad Toorani","doi":"10.1016/j.mechrescom.2024.104324","DOIUrl":"10.1016/j.mechrescom.2024.104324","url":null,"abstract":"<div><p>This paper presents a comprehensive vibrational analysis of geometrically imperfect plate under various boundary conditions. To achieve this, an approach combining the finite element method and Sanders’ shell theory is adopted to develop a mathematical model the plate, considering the displacements in form of polynomial functions. The elementary mass and stiffness matrices required for the finite element method are obtained by analytical integration for a single element, thereby enabling the dynamic equations for an entire homogeneous flat plate without needing to determine all the matrices for each individual element of the plate. The modal study specifically focuses on a thin, isotropic, elastic, and homogeneous plate. This study includes the numerical examples to evaluate the accuracy and convergence characteristics of the proposed finite element model. The analysis examines the influence of various parameters such as mechanical properties, boundary conditions, and different imperfection amplitude on the free vibration characteristics of the plate. The comparison between the experimental and theoretical results reveals a significant agreement. Furthermore, the results highlight an increase in the natural frequencies of the structure due to the presence of initial imperfections. Additionally, the theory accurately describes the dynamic behavior of the plate when the imperfection amplitude is less than, equal to or greater than the thickness of the plate.</p></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0093641324000843/pdfft?md5=e9510ba2bc1fe0a0467ebe09de9c23db&pid=1-s2.0-S0093641324000843-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142158214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Evolutional behavior of viscoelastic materials: A formulation based on logarithmic approach 粘弹性材料的演变行为：基于对数方法的表述

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2024-09-01 DOI: 10.1016/j.mechrescom.2024.104322

Nasser Firouzi , Ahmed S.M. Alzaidi , Hamid Nezaminia

引用次数: 0

Flexoelectric anisotropy and shear contributions in lead-free piezocomposites 无铅压电复合材料中的柔电各向异性和剪切贡献

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2024-09-01 DOI: 10.1016/j.mechrescom.2024.104321

A.K. Jagdish , Federico C. Buroni , Roderick Melnik , Luis Rodriguez-Tembleque , Andrés Sáez

{"title":"Flexoelectric anisotropy and shear contributions in lead-free piezocomposites","authors":"A.K. Jagdish , Federico C. Buroni , Roderick Melnik , Luis Rodriguez-Tembleque , Andrés Sáez","doi":"10.1016/j.mechrescom.2024.104321","DOIUrl":"10.1016/j.mechrescom.2024.104321","url":null,"abstract":"<div><p>Flexoelectricity is the coupling between strain gradients and electric fields. This phenomenon can significantly enhance piezocomposite response in addition to linear piezoelectricity. This enhancement is especially important for lead-free piezocomposites, which generally underperform compared to lead-based counterparts. Flexoelectric enhancement is facilitated by structural anisotropy in piezocomposites. However, challenges in modeling flexoelectric effects arise from several unknowns. Firstly, the shear flexoelectric coefficient is not well-characterized experimentally. Secondly, significant discrepancies exist between theoretical predictions and experimental measurements of flexoelectric coefficients. Thirdly, the influence of matrix mechanical properties on flexoelectric behavior is poorly understood. To address these issues, we construct a parametric flexoelectric model of a lead-free piezocomposite with graded inclusion concentration. We then systematically analyze the impact of each parameter to identify which significantly influence flexoelectric behavior. This study is intended to provide direction to further experimental studies towards understanding and tailoring this subset of parameters.</p></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0093641324000818/pdfft?md5=2e7cbfe9a01c6ebc3b748b3153a80404&pid=1-s2.0-S0093641324000818-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142129992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Understanding and phenomenological modeling of the pinching effect of the load–deflection curve of reinforced concrete beams subjected to bending 受弯钢筋混凝土梁荷载-挠度曲线挤压效应的理解和现象建模

IF 1.9 4区工程技术

Mechanics Research Communications Pub Date : 2024-08-22 DOI: 10.1016/j.mechrescom.2024.104318

Thomas Heitz

{"title":"Understanding and phenomenological modeling of the pinching effect of the load–deflection curve of reinforced concrete beams subjected to bending","authors":"Thomas Heitz","doi":"10.1016/j.mechrescom.2024.104318","DOIUrl":"10.1016/j.mechrescom.2024.104318","url":null,"abstract":"<div><p>The reliable prediction of the seismic response of reinforced concrete (RC) structures hinges on accurate modeling of the cyclic behavior of their constituent elements. The load–deflection curve in RC beams exhibits a pinched hysteresis pattern corresponding to energy dissipations. This pinching effect, often observed under seismic loading conditions, reflects a reduction in stiffness and energy dissipation capacity at certain loading stages. Despite its significance, the detailed mechanisms underlying this phenomenon remain underexplored in existing literature. This paper aims to address this gap by presenting simplified models that directly represents the pinching effect at the crack scale. The model is grounded in a comprehensive analysis of shear stress interactions and crack closure dynamics, hypothesized as primary contributors to the pinching phenomenon. Our approach involves a meticulous examination of the hysteresis loops’ area and shape, facilitating the estimation of an equivalent viscous damping ratio to represent energy dissipation in seismic simulations, irrespective of changes in the structure’s damage or ductility levels. The paper unfolds in three key sections: The first section underscores the significance of a nuanced understanding of the pinching effect in seismic analysis. The second section presents an extensive literature review, consolidating crucial insights into the nature of the pinching phenomenon. The third section details the development and application of the proposed mesoscopic model, highlighting the impact of various geometrical and material parameters on the pinching effect.</p></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142044328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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