International Journal of Solids and Structures最新文献_第8页

Mechanical skin pain and comfort evaluation model applied to skin-integrated electronics 机械皮肤疼痛与舒适评价模型在皮肤集成电子产品中的应用

IF 3.4 3区工程技术

International Journal of Solids and Structures Pub Date : 2025-05-08 DOI: 10.1016/j.ijsolstr.2025.113424

Yunfan Zhu , Dongcan Ji , Yang Wang , Yuhang Li , Min Li , Jiayun Chen , Yinji Ma

{"title":"Mechanical skin pain and comfort evaluation model applied to skin-integrated electronics","authors":"Yunfan Zhu , Dongcan Ji , Yang Wang , Yuhang Li , Min Li , Jiayun Chen , Yinji Ma","doi":"10.1016/j.ijsolstr.2025.113424","DOIUrl":"10.1016/j.ijsolstr.2025.113424","url":null,"abstract":"<div><div>Skin-integrated electronics have received significant attention in medical and health monitoring. Due to improper usage or design, skin pains and discomfort tend to occur in users of skin-integrated electronics, particularly in patients with nervous system damage. This paper presented a theoretical model for evaluating the skin pain and comfort of skin-integrated electronics, based on the physiological process of human pain perception. Additionally, the impact of glial cell reduction on pain caused by damage to the nervous system was analyzed. The simulations were carried out to analyze the skin pain sensation under three different mechanical stimuli from typical skin-integrated electronics, which included: mechanics model of multilayer skin, nerve signal transduction based on Hodgkin-Huxley model, transmission and perception rooted in gate control theory. The stress distribution demonstrated by finite element analysis on the multilayer skin was produced using the viscoelasticity theory. Among three different mechanical stimuli from typical skin-integrated electronics, the numerical experiments obtained the appropriate load for rapid pain response and comfort design, respectively. Furthermore, factors influence the skin pain perception were discussed including skin thickness and number of glial cells, which could contribute to the design of skin-integrated electronics in medical applications.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"318 ","pages":"Article 113424"},"PeriodicalIF":3.4,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143936775","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

Micromechanical modelling of the elastoplasticity and damage in ductile metals 塑性金属弹塑性与损伤的微观力学模拟

IF 3.4 3区工程技术

International Journal of Solids and Structures Pub Date : 2025-05-08 DOI: 10.1016/j.ijsolstr.2025.113437

Ignasi Mundó , Ferhun C. Caner , Antonio Mateo

{"title":"Micromechanical modelling of the elastoplasticity and damage in ductile metals","authors":"Ignasi Mundó , Ferhun C. Caner , Antonio Mateo","doi":"10.1016/j.ijsolstr.2025.113437","DOIUrl":"10.1016/j.ijsolstr.2025.113437","url":null,"abstract":"<div><div>Even though the computational constitutive modelling of the mechanical behavior of ductile metals at macroscopic scale has been studied extensively, the complexities in the mechanical behavior of ductile metals continue to challenge the existing models. Ideally the model must predict accurately the elastoplastic behavior of the material under both proportional and non-proportional loadings, its fracturing behavior under both uniaxial and multiaxial stress states as well as its behavior under cyclic loadings. Furthermore, the model must be tested against various test data obtained from specimens made of the same metal alloy. In this study, we present a constitutive model using the microplane approach in which the stress–strain relations are defined on various planes in terms of stress and strain vectors, which are independently activated depending on the strain tensor, effectively creating a multisurface plasticity model. The constitutive relations consist of two separate stress–strain boundaries applied on any given microplane: One for the shear behavior and another for the deviatoric behavior. Data fitting experience revealed that stress triaxiality must be considered only in the deviatoric boundary. Damage evolution is incorporated into both boundaries. The model is calibrated against experimental data obtained from specimens made of Aluminum alloys (6061-T6, 2024-T4 and 7075-T651) and the model predictions are compared against experimental data obtained from specimens made of the same alloy. Furthermore, the model predictions are compared to a different microplane model called the model MPJ2. In addition to test data at various stress triaxialities, test data on Vertex effect and Bauschinger effect are also taken into account.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"317 ","pages":"Article 113437"},"PeriodicalIF":3.4,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931390","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

Failure mechanism in stochastic network materials: The competition between fiber and crosslink failure 随机网络材料的失效机制：光纤和交联失效的竞争

IF 3.4 3区工程技术

International Journal of Solids and Structures Pub Date : 2025-05-07 DOI: 10.1016/j.ijsolstr.2025.113445

Nishan Parvez, Catalin R. Picu

{"title":"Failure mechanism in stochastic network materials: The competition between fiber and crosslink failure","authors":"Nishan Parvez, Catalin R. Picu","doi":"10.1016/j.ijsolstr.2025.113445","DOIUrl":"10.1016/j.ijsolstr.2025.113445","url":null,"abstract":"<div><div>Materials whose main structural component is a network of fibers are known collectively as network materials and are ubiquitous in engineering and biology. Their strength is critical in many biological applications and industrial processes. Failure in network materials without embedding matrix or with a fluidic matrix is controlled by the rupture of fibers and crosslinks. This work evaluates the competition between fiber and crosslink rupture mechanisms in defining the network strength. It is shown that a single parameter – the ratio of the crosslink to fiber strengths, <span><math><mrow><msup><mrow><mi>Γ</mi></mrow><mi>c</mi></msup></mrow></math></span> – is sufficient to describe this physics. The mechanism dominance transition takes place in the approximate range <span><math><mrow><mn>0.25</mn><mo><</mo><msup><mrow><mi>Γ</mi></mrow><mi>c</mi></msup><mo>≤</mo><mn>1</mn></mrow></math></span>, which is independent of other structural network parameters. The bias of <span><math><mrow><msup><mrow><mi>Γ</mi></mrow><mi>c</mi></msup></mrow></math></span> to values somewhat smaller than 1 is due to the fact that in an elastic network in which failure is prevented, fibers carry larger forces than the crosslinks. Network strength is proportional to the strength of the critical component (fibers or crosslinks) and, for the type of networks considered here, is proportional to the square of the network density. This relation applies equally in the parametric regimes in which one mechanism dominates, and in the transition regime. The present data provides insight into the failure mechanism of network materials and the scaling laws relevant in material design.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"318 ","pages":"Article 113445"},"PeriodicalIF":3.4,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144069519","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

Reflection and transmission of elastic waves from an immersed Willis slab at oblique incidence

IF 3.4 3区工程技术

International Journal of Solids and Structures Pub Date : 2025-05-07 DOI: 10.1016/j.ijsolstr.2025.113394

Max Gattin , Nicolas Bochud , Giuseppe Rosi , Philip A. Cotterill , William J. Parnell , Salah Naili

{"title":"Reflection and transmission of elastic waves from an immersed Willis slab at oblique incidence","authors":"Max Gattin , Nicolas Bochud , Giuseppe Rosi , Philip A. Cotterill , William J. Parnell , Salah Naili","doi":"10.1016/j.ijsolstr.2025.113394","DOIUrl":"10.1016/j.ijsolstr.2025.113394","url":null,"abstract":"<div><div>Elastic metamaterials allow for the control of wave propagation by exploiting local resonances in their internal structure, which leads to unconventional effective properties. However, complex phenomena like non-reciprocity and asymmetry require advanced homogenized models like the Willis model, which introduces additional coupling terms in the elastodynamics equations. The identification of the effective properties of the Willis medium has been predominantly restricted to 1D-wave propagation problems, and therefore here we extend its application to a heterogeneous, viscoelastic meta-slab under oblique wave incidence. In such a configuration, the key challenge in the parameter identification arises from the response of the medium, which is made more complex due to polarization coupling and a larger number of effective parameters. To address this, we adapt the stiffness matrix method to this configuration, enabling the analytical determination of reflection and transmission coefficients. We show how the partial inverse identification of some effective parameters can be analytically obtained by exploiting polarization decoupling at normal incidence. A numerical case study of a meta-slab with a resonant inclusion demonstrates how Willis coupling allows for the prescription of the asymmetric behavior of the meta-slab with a single set of effective parameters. Altogether, the reported methodology and results pave the way towards the complete identification of the effective properties of the Willis medium.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"318 ","pages":"Article 113394"},"PeriodicalIF":3.4,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143943453","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 exact small deformation model for a curved planar beam incorporating the bending warping 考虑弯曲翘曲的平面弯曲梁的精确小变形模型

IF 3.4 3区工程技术

International Journal of Solids and Structures Pub Date : 2025-05-06 DOI: 10.1016/j.ijsolstr.2025.113430

G.H. Ma , Y.L. Pei , L.X. Li

引用次数: 0

Nonlinear static analysis of metamaterial structures based on the Kagome lattice using beam finite elements and component-wise approach 基于Kagome点阵的超材料结构非线性静力分析

IF 3.4 3区工程技术

International Journal of Solids and Structures Pub Date : 2025-05-06 DOI: 10.1016/j.ijsolstr.2025.113387

R. Augello , E. Carrera , W.Q. Chen , B. Wu , Y.Z. Wang

{"title":"Nonlinear static analysis of metamaterial structures based on the Kagome lattice using beam finite elements and component-wise approach","authors":"R. Augello , E. Carrera , W.Q. Chen , B. Wu , Y.Z. Wang","doi":"10.1016/j.ijsolstr.2025.113387","DOIUrl":"10.1016/j.ijsolstr.2025.113387","url":null,"abstract":"<div><div>This work numerically investigates the mechanical behavior of metamaterial structures inspired by the Kagome lattice mechanism using the Carrera Unified Formulation (CUF). The proposed numerical model employs enhanced one-dimensional finite elements with three-dimensional capabilities, enabling precise predictions of deformation patterns and stress–strain responses under various loading conditions. With CUF, any three-dimensional effects can be captured, allowing for the analysis of the width direction of these metamaterial structures, potentially accounting for varying geometric properties. The model’s robustness is demonstrated through its ability to capture critical phenomena such as buckling, post-buckling behavior, and rigid-body rotations of lattice triangles, which are hallmarks of the Kagome lattice’s unique mechanical properties. The introduction of stiffer hinges highlights the potential for tailoring mechanical responses to meet specific design requirements, such as enhanced load-carrying capacity and optimized energy absorption. This study demonstrates the versatility of Kagome lattice-based metamaterials and lays the groundwork for future research, including the analysis of 3D Kagome-lattice metamaterials facilitated to the proposed numerical model.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"318 ","pages":"Article 113387"},"PeriodicalIF":3.4,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143936774","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

Numerical Modeling of Stress-State Dependent Damage Evolution and Ductile Fracture of Austenitic Stainless Steel 奥氏体不锈钢应力状态相关损伤演化与韧性断裂数值模拟

IF 3.4 3区工程技术

International Journal of Solids and Structures Pub Date : 2025-05-06 DOI: 10.1016/j.ijsolstr.2025.113439

Myung-Sung Kim , You-Hee Cho , Hwasup Jang

引用次数: 0

Predicting nanoscale stress-strain curves: A Gaussian processes within a Bayesian framework 预测纳米尺度应力-应变曲线：贝叶斯框架内的高斯过程

IF 3.4 3区工程技术

International Journal of Solids and Structures Pub Date : 2025-05-06 DOI: 10.1016/j.ijsolstr.2025.113438

Ahmad Altarabsheh , Ibrahim Altarabsheh , Xiang Chen

{"title":"Predicting nanoscale stress-strain curves: A Gaussian processes within a Bayesian framework","authors":"Ahmad Altarabsheh , Ibrahim Altarabsheh , Xiang Chen","doi":"10.1016/j.ijsolstr.2025.113438","DOIUrl":"10.1016/j.ijsolstr.2025.113438","url":null,"abstract":"<div><div>This study introduces an innovative method for probabilistically predicting the stress–strain curves of nanoscale materials, with a specific focus on material volume. To achieve this, molecular dynamics (MD) simulations were meticulously conducted across various material sizes to gather stress–strain data. Subsequently, a sophisticated approach was employed, integrating a Gaussian process (GP) within a Bayesian framework to comprehensively model the stress–strain behavior and forecast the complete stress–strain profiles for materials of different sizes. What sets this probabilistic machine learning algorithm apart is its capacity to not only offer precise predictions of material behavior but also to provide a detailed assessment of uncertainty. This feature ensures its effectiveness in generating accurate forecasts of stress–strain characteristics, surpassing the conventional limitations posed by material volume encountered in MD simulations. In doing so, it addresses the crucial challenge of size restrictions inherent to atomistic simulations. To rigorously validate the capabilities of this methodology, we conducted extensive testing using pure copper as our experimental material, benefitting from its comprehensive repository of stress–strain data. It is important to note that this methodology is not restricted to any specific material; instead, it serves as a robust and versatile tool for probabilistically predicting the mechanical properties of nanoscale materials. Consequently, this approach holds immense potential for diverse applications within the field of materials science and engineering, offering researchers an invaluable means to gain insights into the behavior of materials at the nanoscale.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"317 ","pages":"Article 113438"},"PeriodicalIF":3.4,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143924411","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 nonlinear unit cell for adaptive lattice structures with shape-memory-like behaviour

IF 3.4 3区工程技术

International Journal of Solids and Structures Pub Date : 2025-05-05 DOI: 10.1016/j.ijsolstr.2025.113411

Samuel P. Pickup , Isaac V. Chenchiah , Rainer M.J. Groh

{"title":"A nonlinear unit cell for adaptive lattice structures with shape-memory-like behaviour","authors":"Samuel P. Pickup , Isaac V. Chenchiah , Rainer M.J. Groh","doi":"10.1016/j.ijsolstr.2025.113411","DOIUrl":"10.1016/j.ijsolstr.2025.113411","url":null,"abstract":"<div><div>We present and classify a fundamental building block for constructing macro-scale lattice structures with shape-memory-like behaviour. Shape memory alloys (SMAs) are materials that undergo a reversible phase transition at the atomic scale from a high-symmetry crystal structure above a transition temperature to a lower-symmetry crystal structure below the transition temperature, thereby imbuing these alloys with superelastic properties and the ability to recover a previous shape when heated. We present a unit cell for creating latticed metamaterials at the macro- rather than the micro-scale that shows similar smart, adaptive behaviour in two and three spatial dimensions. Specifically, we study a square unit cell with rigid outer edges and two nonlinear springs on the diagonals that undergoes instabilities into planar, rhombic and/or non-planar, folded states. We identify two non-dimensional parameters that govern the planar multistable behaviour, and derive boundaries that split the domain into monostable (square cell), bistable (rhombic cell) and tristable (square and rhombic cells) regimes. Transitions between the square and rhombic configurations can be smooth/soft or sudden/hard. We illustrate how changes in the springs’ rest lengths and stiffness properties define the possible types of phase transitions, irrespective of the physical mechanisms (such as temperature, electromagnetic fields or swelling) driving those changes. In addition to planar multi-stability, we define the parameter regime wherein the initially planar unit cell can deform out of the plane.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"318 ","pages":"Article 113411"},"PeriodicalIF":3.4,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143943450","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

The tensile mechanics of creped fiber networks: Effects of interfacial-delamination, buckling, and damage 蠕变纤维网络的拉伸力学：界面分层、屈曲和损伤的影响

IF 3.4 3区工程技术

International Journal of Solids and Structures Pub Date : 2025-05-05 DOI: 10.1016/j.ijsolstr.2025.113408

Shubham Agarwal, Sheldon I. Green, A. Srikantha Phani

{"title":"The tensile mechanics of creped fiber networks: Effects of interfacial-delamination, buckling, and damage","authors":"Shubham Agarwal, Sheldon I. Green, A. Srikantha Phani","doi":"10.1016/j.ijsolstr.2025.113408","DOIUrl":"10.1016/j.ijsolstr.2025.113408","url":null,"abstract":"<div><div>Paper products, like tissue paper, are composed of bonded wood fiber networks. Dry creping is an industrial process used in tissue manufacturing. In this process, a wet paper sheet (web) is adhered to a high-speed metal dryer (substrate). The dried sheet is then scraped off against a stationary metal blade, leading to web–substrate debonding, sheet folding, and damage caused by the rupture of interfiber bonds. This process creates a microfolded structure, leading to a nonlinear tensile response and high failure strain, while sheet-damage results in sheet de-densification (through thickness explosion). Based on the visualized creped structures, creped sheets are classified as shaped-bulk (folding-dominated) or explosive-bulk (damage-dominated). While factors affecting sheet-folding have been studied extensively, the effects of sheet-damage on structural and tensile properties have not been previously studied. Using a Discrete Element Method (DEM) to model low grammage fiber networks, we simulate creping with a bilinear elastoplastic fiber model. We demonstrate that altering sheet–substrate bond (adhesive) properties relative to interfiber bonds shifts creping from shaped-bulk to explosive-bulk. Signatures of the above two creping modes are identified. Shaped-bulk sheets exhibit fewer interfiber bond ruptures, a higher degree-of-folding (waviness), and less through-thickness explosion, while explosive-bulk sheets show the opposite traits. During tensile deformation, bending dominates initially, followed by an increased axial deformation near failure as unfolding occurs. The transition from shaped-bulk to explosive-bulk creping shows an initial increase in stiffness followed by a decline, and a gradual then rapid, decrease in tensile strength.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"317 ","pages":"Article 113408"},"PeriodicalIF":3.4,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931391","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