Mechanics of Materials最新文献_第6页

A grain boundary region model to capture grain size and misorientation effects on elasto-plastic response of polycrystals 一个晶界区域模型来捕捉晶粒尺寸和取向错误对多晶弹塑性响应的影响

IF 4.1 3区材料科学

Mechanics of Materials Pub Date : 2026-02-01 Epub Date: 2025-11-11 DOI: 10.1016/j.mechmat.2025.105541

Devesh Tiwari , Ayub Khan , Pierre-Antony Deschênes , Daniel Paquet , Pritam Chakraborty

{"title":"A grain boundary region model to capture grain size and misorientation effects on elasto-plastic response of polycrystals","authors":"Devesh Tiwari , Ayub Khan , Pierre-Antony Deschênes , Daniel Paquet , Pritam Chakraborty","doi":"10.1016/j.mechmat.2025.105541","DOIUrl":"10.1016/j.mechmat.2025.105541","url":null,"abstract":"<div><div>Grain Boundaries (GBs) disrupt the motion of dislocations and thereby affect the elasto-plastic deformation behavior of polycrystalline alloys. A majority of conventional polycrystal plasticity models represent GBs as sharp interfaces and do not incorporate GB micro-mechanics. In this work, a novel constitutive formulation for finitely thick GB region is developed which incorporates properties of all the adjoining grains. The GB model is based on penalizing the slip rate on the slip systems of single crystals in the GB region with an extra activation energy term. The energy penalty is based on minimizing the remnant dislocation line on GB for incoming and outgoing slip systems and evolves with slip accumulation. The size dependent elasto-plastic response of polycrystals is captured in this model by incorporating Geometrically Necessary Dislocations (GNDs) in addition to the Statistically Stored Dislocations (SSDs). The model has been implemented in a Crystal Plasticity Finite Element Method (CPFEM) code and applied to simulate the plane strain uni-axial tensile deformation of FCC polycrystals. The analyses show that the model is able to capture: (i) the single crystal response for a bicrystal with zero misorientation; and (ii) the dependence of Hall–Petch factor on misorientation. A normalized critical GB thickness value has also been derived which renders the macroscopic response insensitive to the GB region size. Polycrystal CPFEM simulations demonstrate that the model can capture the strain dependence of Hall–Petch factor reasonably well.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"213 ","pages":"Article 105541"},"PeriodicalIF":4.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145527971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of pore shape on steady plastic shockwaves and collapse dynamics in porous metals 多孔金属中孔隙形状对稳定塑性冲击波和坍塌动力学的影响

IF 4.1 3区材料科学

Mechanics of Materials Pub Date : 2026-02-01 Epub Date: 2025-11-21 DOI: 10.1016/j.mechmat.2025.105551

Alain Molinari , Eyass Massarwa , Christophe Czarnota

{"title":"Effect of pore shape on steady plastic shockwaves and collapse dynamics in porous metals","authors":"Alain Molinari , Eyass Massarwa , Christophe Czarnota","doi":"10.1016/j.mechmat.2025.105551","DOIUrl":"10.1016/j.mechmat.2025.105551","url":null,"abstract":"<div><div>Porous materials offer the possibility to optimize shock wave mitigation by monitoring, with additive manufacturing, the pore configuration (volume fraction, shape and spatial distribution of voids). Therefore, it is of interest to uncover the relationship between void configuration and shock wave response. In this paper we develop an analysis of planar plastic shock waves generated in porous aluminum by the impact of a projectile. Methodology and results can be easily extended to other materials. We focus specially on the relationship between shock-width and void-shape for given impact velocity and fixed initial volume fraction and spatial distribution of voids. We consider a Finite Element modeling of a periodic material with axisymmetric configuration. Each unit cell contains a spheroidal void with symmetry axis aligned along the impact direction. It is shown that the shock width is significantly affected by the process of void collapse. This process appears to be quite different for flat (oblate) and elongated (prolate) voids. For both types of voids, we analyze how the process and the speed of void closure are affected by the void aspect ratio, and we demonstrate that the shock width is increased by slowing down the speed of void collapse. Effects of the void aspect ratio on the void closure speed and on the shock-width are quantified. We explain why the slowest void closure and the largest shock width are obtained for spherical voids.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"213 ","pages":"Article 105551"},"PeriodicalIF":4.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145691126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A unified thermally activated viscoplastic framework for bitumen failure prediction across various loading paths 一个统一的热激活粘塑性框架，用于沥青在不同加载路径上的破坏预测

IF 4.1 3区材料科学

Mechanics of Materials Pub Date : 2026-02-01 Epub Date: 2025-12-03 DOI: 10.1016/j.mechmat.2025.105569

Yankai Wen, Lin Wang

{"title":"A unified thermally activated viscoplastic framework for bitumen failure prediction across various loading paths","authors":"Yankai Wen, Lin Wang","doi":"10.1016/j.mechmat.2025.105569","DOIUrl":"10.1016/j.mechmat.2025.105569","url":null,"abstract":"<div><div>Accurately characterizing bitumen failure under combined thermal and mechanical stresses is key to designing durable pavement systems. This study proposes a unified, physically based framework that incorporates two thermally activated models to characterize the degradation behavior of bitumen. Eyring's stress-assisted molecular flow theory is applied to capture the nonlinear viscoplastic flow behavior under sustained loading, while a modified Arrhenius formulation expressed as a function of stress and temperature is utilized to mechanistically predict failure time. All model parameters are calibrated exclusively using constant-stress creep tests and are subsequently applied without any additional fitting to predict both the evolution of viscoplastic strain and the failure time under strain- and stress-controlled monotonic shear loading tests. Validation across a broad temperature spectrum confirms the model's high accuracy and indicates that viscoplastic deformation and failure are controlled by a common thermally activated mechanism, largely unaffected by the loading path. Minor deviations observed at elevated temperatures indicate the presence of self-healing behavior, suggesting a potential direction for future model refinement. Overall, the proposed framework provides a scalable, mechanistically interpretable, and experimentally efficient approach for reliable binder performance evaluation and performance-based material design.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"213 ","pages":"Article 105569"},"PeriodicalIF":4.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145691124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterizing friction coefficients of soft materials via stick-slip data in static friction: Mechanism analysis and experimental validation 用静摩擦黏滑数据表征软质材料摩擦系数：机理分析与实验验证

IF 4.1 3区材料科学

Mechanics of Materials Pub Date : 2026-02-01 Epub Date: 2025-11-10 DOI: 10.1016/j.mechmat.2025.105545

Huixin Wei , Wei Fang , Shibin Wang , Zhiyong Wang , Zehui Lin , Baopeng Liao

{"title":"Characterizing friction coefficients of soft materials via stick-slip data in static friction: Mechanism analysis and experimental validation","authors":"Huixin Wei , Wei Fang , Shibin Wang , Zhiyong Wang , Zehui Lin , Baopeng Liao","doi":"10.1016/j.mechmat.2025.105545","DOIUrl":"10.1016/j.mechmat.2025.105545","url":null,"abstract":"<div><div>Understanding the friction behavior of soft materials critically depends on the precise characterization of the contact interface. The current characterization methods of friction behavior are limited by its predominant reliance on data from the sliding stage, which often neglects the static friction. In this study, a friction model describing the static friction stage of soft materials is proposed, considering contact deformation and stick slip phenomena. A tribometry platform is designed to investigate these interfacial phenomena during soft material friction. The platform integrates an optical visualization setup with high-resolution imaging components and mechanical loading systems, enabling real-time monitoring of contact evolution. An automated image processing algorithm with edge detection is developed to quantitatively extract displacement-dependent contact zone boundaries from the captured image sequences. Full-field displacement mapping within the contact zone is achieved through integration with two-dimensional digital image correlation (2D-DIC) analysis. The friction coefficient can be further determined by friction model and stick-slip data in static friction. The developed methodology provides new insights into interfacial mechanisms and a characterization framework for sliding friction of soft material, with the applicability in evaluating grip performance of robotics.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"213 ","pages":"Article 105545"},"PeriodicalIF":4.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145527970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A failure mode dependent damage model with analytical expressions of damage evolution for brittle fiber reinforced composites 基于破坏模式的脆性纤维增强复合材料损伤演化解析模型

IF 4.1 3区材料科学

Mechanics of Materials Pub Date : 2026-02-01 Epub Date: 2025-11-27 DOI: 10.1016/j.mechmat.2025.105562

Shubham Rai, Badri Prasad Patel

{"title":"A failure mode dependent damage model with analytical expressions of damage evolution for brittle fiber reinforced composites","authors":"Shubham Rai, Badri Prasad Patel","doi":"10.1016/j.mechmat.2025.105562","DOIUrl":"10.1016/j.mechmat.2025.105562","url":null,"abstract":"<div><div>A 3D failure mode dependent continuum damage model is proposed for brittle fiber-reinforced laminated composites with analytical expressions for coupled damage evolution equations. Two strategies are used to determine coupling vectors (responsible for coupling of damage evolution in different directions): (1) derived from potential functions, and (2) determined from uniaxial and shear experimental stress–strain data. The damage model parameters are determined by minimizing the difference between model predicted and available experimental uniaxial and shear stress–strain curves in the literature. The proposed model captures varying degree of non-linearity in available experimental uniaxial and shear stress–strain curves. The calibrated damage model is employed for progressive failure analysis of moderately thick laminated composite plates using higher-order shear deformation theory with thickness stretch and zig-zag terms. The governing equations are solved using finite element method coupled with Newton–Raphson iterative procedure. It is found that the damage variables based on coupling vectors derived from potential functions are physically consistent unlike coupling vectors obtained from uniaxial and shear stress–strain curves. The proposed model predicts different damage in tension and compression consistent with the strength properties of fiber reinforced composite material in different directions. A parametric study demonstrates the model’s flexibility to match failure loads predicted by existing models in the literature. The model predicted failure loads for notched laminated composite plates under uniaxial tension show good agreement with the experimental results available in the literature.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"213 ","pages":"Article 105562"},"PeriodicalIF":4.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145621503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A multi-layer model for residual stress relaxation aligned with microstructure evolution under thermal exposure and cyclic loading 基于热暴露和循环加载下微观结构演变的残余应力松弛多层模型

IF 4.1 3区材料科学

Mechanics of Materials Pub Date : 2026-02-01 Epub Date: 2025-11-07 DOI: 10.1016/j.mechmat.2025.105543

Dianyin Hu , Tao Wang , Hongyang Huang , Jianxing Mao , Jier Wang , Xin Wang , Yang Gao , Liucheng Zhou , Rongqiao Wang

{"title":"A multi-layer model for residual stress relaxation aligned with microstructure evolution under thermal exposure and cyclic loading","authors":"Dianyin Hu , Tao Wang , Hongyang Huang , Jianxing Mao , Jier Wang , Xin Wang , Yang Gao , Liucheng Zhou , Rongqiao Wang","doi":"10.1016/j.mechmat.2025.105543","DOIUrl":"10.1016/j.mechmat.2025.105543","url":null,"abstract":"<div><div>Residual stress relaxation phenomena under thermomechanical conditions, particularly thermal exposure and cyclic loading, constitute critical determinants of fatigue performance in surface-treated engineering components. This study systematically investigates the thermal and cyclic relaxation mechanisms in shot-peened Ni-based superalloy GH4720Li through integrated experimental characterization and computational modeling. Through systematic characterization via X-ray diffraction (XRD) and electron backscatter diffraction (EBSD), we establish quantitative correlations between residual stress relaxation kinetics and concurrent microstructure evolution, particularly dislocation annihilation and grain boundary restructuring. Building upon these observations, a novel multilayer constitutive framework is developed to decouple the synergistic effects of microstructural evolution on residual stress relaxation dynamics. The model demonstrates predictive accuracy within 6.3 % for residual stress magnitudes and 3.3 % for characteristic depth parameters when compared to stabilized thermal exposure data. Under cyclic loading conditions, corresponding errors remain constrained to 15.5 % and 4.8 %, respectively. Such precision validates the model's capability to isolate microstructure-driven relaxation mechanisms from purely mechanical contributions. This multi-physics framework provides an unprecedented quantitative tool for optimizing surface-engineered components operating in combined high-temperature and cyclic loading environments, effectively bridging the gap between microstructure-aware modeling and industrial fatigue life prediction.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"213 ","pages":"Article 105543"},"PeriodicalIF":4.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145499982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A unified treatment of two-dimensional adhesive contact on a power-law graded elastic half-plane 幂律梯度弹性半平面上二维粘着接触的统一处理

IF 4.1 3区材料科学

Mechanics of Materials Pub Date : 2026-02-01 Epub Date: 2025-11-25 DOI: 10.1016/j.mechmat.2025.105559

Fan Xia , Fan Jin

{"title":"A unified treatment of two-dimensional adhesive contact on a power-law graded elastic half-plane","authors":"Fan Xia , Fan Jin","doi":"10.1016/j.mechmat.2025.105559","DOIUrl":"10.1016/j.mechmat.2025.105559","url":null,"abstract":"<div><div>This study develops a unified theoretical solution for two-dimensional (2D) adhesive contact between a power-law graded elastic half-plane and symmetric rigid punches, covering both JKR-type adhesive and non-adhesive conditions. Based on the Betti reciprocal theorem and the generalized Abel transform, closed-form expressions are obtained for surface deformation, pressure distribution, load-displacement relations, and pull-off force. The solution is applied to analyze various punch profiles, such as power-law, cylindrical, optimal, and concave types, highlighting the coupled effects of punch geometry and material gradation on debonding behavior. Classical results for flat, parabolic, and wedge indenters are recovered as special cases. Notably, only the wedge punch exhibits a pull-off force independent of Young’s modulus and Poisson’s ratio in the 2D case, in contrast with the axisymmetric case where only the parabolic punch shows such behavior. For concave indenters, three debonding modes (from edge, center, or full-interface) can be controlled via geometric or gradation parameters. These results provide insights for designing interfacial adhesion through coordinated geometric and material tailoring.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"213 ","pages":"Article 105559"},"PeriodicalIF":4.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145621504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Semi-analytical method for frictional sliding contact of a piezoelectric layer-substrate 压电层-衬底摩擦滑动接触的半解析方法

IF 4.1 3区材料科学

Mechanics of Materials Pub Date : 2026-02-01 Epub Date: 2025-12-10 DOI: 10.1016/j.mechmat.2025.105572

Van Thuong Nguyen , Van Son Pham , Nguyen Dinh Duc , Tinh Quoc Bui

{"title":"Semi-analytical method for frictional sliding contact of a piezoelectric layer-substrate","authors":"Van Thuong Nguyen , Van Son Pham , Nguyen Dinh Duc , Tinh Quoc Bui","doi":"10.1016/j.mechmat.2025.105572","DOIUrl":"10.1016/j.mechmat.2025.105572","url":null,"abstract":"<div><div>Layer-substrate structures are commonly used in many high-tech devices and are often composed of anisotropic piezoelectric materials. Contact analysis of layer-substrate structures with accuracy and efficiency is vital in the design process to ensure the safety and performance of devices and systems. In this paper, we introduce a semi-analytical method (SAM) for fast and efficient analysis of frictional sliding contact in the piezoelectric layer-substrate structures. In this SAM setting, the surface Green function for a piezoelectric bimaterial is first derived. This Green’s function inherently satisfies the boundary conditions of the interfaces. Thus, SAM eliminates the need for meshing along the interface between the layer and substrate, which offers benefits in terms of meshing reduction, computational cost, and time. Using this Green’s function as a kernel, the SAM further benefits from analytically computable influence matrices, which boosts both accuracy and computational efficiency. The method is broadly applicable to systems in which the materials of the layer and substrate are generally anisotropic. The punch profile can be arbitrary and is either an insulator or a conductor. To verify the correctness of the proposed semi-analytical method, numerical results are compared to those obtained by the available methods, e.g., the analytical solutions and the boundary element method, and are verified through the mesh-sensitive analysis. With the numerical data, the parametric studies are implemented to demonstrate the versatility and explore the influences of the anisotropy, thickness of the layer, friction, and many other factors on the contact responses of the layer-substrate structures. These studies offer valuable insights for the design of smart layer-substrate structures that use anisotropic piezoelectric materials.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"213 ","pages":"Article 105572"},"PeriodicalIF":4.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145733022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Global existence and uniqueness of weak solutions for a Willis-type model of elastodynamics 一类willis型弹性动力学模型弱解的整体存在唯一性

IF 4.1 3区材料科学

Mechanics of Materials Pub Date : 2026-02-01 Epub Date: 2025-12-01 DOI: 10.1016/j.mechmat.2025.105561

Thomas Blesgen , Patrizio Neff

引用次数: 0

Computational investigations of graded density metallic foams subjected to blast type loads 爆炸载荷作用下梯度密度金属泡沫材料的计算研究

IF 4.1 3区材料科学

Mechanics of Materials Pub Date : 2026-02-01 Epub Date: 2025-12-09 DOI: 10.1016/j.mechmat.2025.105568

Bhanu Pratap Sharma, Abhijit Gogulapati, Viren Menezes

{"title":"Computational investigations of graded density metallic foams subjected to blast type loads","authors":"Bhanu Pratap Sharma, Abhijit Gogulapati, Viren Menezes","doi":"10.1016/j.mechmat.2025.105568","DOIUrl":"10.1016/j.mechmat.2025.105568","url":null,"abstract":"<div><div>Foam-like materials are highly compressible and are widely used for shock and impact mitigation. However, studies show that under extreme loading, uniform-density Aluminum foams can amplify the incoming blast wave instead of attenuating it. The present work investigates the reasons behind such amplification using finite element simulations. The mitigation performance of Aluminum based uniform-density foams (UDFs) and graded-density foams (GDFs) were analyzed. The effects of various parameters such as peak pressure, foam density, foam length, pulse duration, and density gradient are presented. The gradient in density is introduced by using a Gaussian function. The ability of a given foam to mitigate or amplify a given load is examined with the help of the standard xt-plots and two non-dimensional parameters, <span><math><msub><mrow><mover><mrow><mi>P</mi></mrow><mrow><mo>̄</mo></mrow></mover></mrow><mrow><mi>m</mi><mi>a</mi><mi>x</mi></mrow></msub></math></span> and <span><math><mover><mrow><mi>l</mi></mrow><mrow><mo>̄</mo></mrow></mover></math></span>. The results show that based on the relative magnitudes of these parameters, the foam response falls into three regimes—elastic amplification, plastic attenuation, and plastic amplification. In particular, critical thresholds in length, pulse duration, peak pressure, and density gradient define the transition between amplification and attenuation. Neither UDFs nor GDFs are consistently superior; their performance depends on the interplay of the input parameters.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"213 ","pages":"Article 105568"},"PeriodicalIF":4.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145733103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0