Mechanics of Materials最新文献_第6页

Efficient prediction of strength and strain localisation in porous solids via microstructure-based limit analysis

IF 3.4 3区材料科学

Mechanics of Materials Pub Date : 2025-02-01 DOI: 10.1016/j.mechmat.2024.105208

Jonas Hund , Varvara Kouznetsova , Tito Andriollo

{"title":"Efficient prediction of strength and strain localisation in porous solids via microstructure-based limit analysis","authors":"Jonas Hund , Varvara Kouznetsova , Tito Andriollo","doi":"10.1016/j.mechmat.2024.105208","DOIUrl":"10.1016/j.mechmat.2024.105208","url":null,"abstract":"<div><div>A new method is presented to predict strength and strain localisation in solids containing voids or soft particles at reduced computational cost compared to traditional micro-mechanical approaches. The method leverages the fact that strain localisation in such materials occurs in the form of narrow shear bands connecting the voids. Accordingly, the model domain is discretised with rigid triangular blocks defined by the Delaunay triangulation of the void centroids. Deformation and energy dissipation are assumed to be confined to discontinuities of the velocity field introduced along the block edges, representing the narrow zones of strain localisation within the shear bands. The block velocities are computed within the framework of plastic limit analysis by minimising the total rate of internal work while ensuring compatible deformation across the solid. Accordingly, the predicted strength represents an upper bound. The adopted microstructure-based discretisation strategy effectively limits the number of potential discontinuities compared to similar methods proposed in the literature, thereby increasing the computational efficiency. To demonstrate the capabilities of the method, predicted macroscopic strength under uniaxial tension and strain localisation patterns in 2D porous microstructures with varying porosity fractions are compared to the finite element results.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"201 ","pages":"Article 105208"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The role of crystal orientation in cracking performance of HCP magnesium single crystals

IF 3.4 3区材料科学

Mechanics of Materials Pub Date : 2025-02-01 DOI: 10.1016/j.mechmat.2024.105235

Xin Lai , Siyan Ran , Xiaoyang Pei , Hao Zhang , Fang Wang

{"title":"The role of crystal orientation in cracking performance of HCP magnesium single crystals","authors":"Xin Lai , Siyan Ran , Xiaoyang Pei , Hao Zhang , Fang Wang","doi":"10.1016/j.mechmat.2024.105235","DOIUrl":"10.1016/j.mechmat.2024.105235","url":null,"abstract":"<div><div>This work was committed to conducting atomistic simulations for exploring the crystal orientation dependence of fracture behavior in hexagonal close-packed (HCP) magnesium single crystals. Combined with the traction–separation (T–S) law of the cohesive zone model, microstructure evolutions with various orientations during crack propagation were investigated to probe the anisotropy of crack pattern. We discovered that stress concentrations at the crack tip led to dislocation emission, which was strongly dependent upon the Schmid factor. It was also found that for the (1_210) [10_10] crack orientation, the stress-induced phase transition occurring at the crack tip delayed the crack extension, indicative of the coupling between phase transition and crack propagation. Interestingly, there were several deformation twin types produced at various orientations, which duly affected the crack pattern. Especially for the (0001) [1_210] crack orientation, the formation and growth of {11_21} twins promoted the brittle-to-ductile cracking, which was different from other two orientations. Furthermore, the resultant T–S parameters together with microstructural evolution information revealed the contribution of crystal orientation to intrinsic fracture behavior. This study is expected to offer in-depth insights on the crack-tip behavior induced by crystal orientation, promoting the development of magnesium.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"201 ","pages":"Article 105235"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150881","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

Mechanical effects of self-stress states in graphene membranes in multiscale modeling

IF 3.4 3区材料科学

Mechanics of Materials Pub Date : 2025-02-01 DOI: 10.1016/j.mechmat.2024.105226

Michele Curatolo , Ginevra Salerno

{"title":"Mechanical effects of self-stress states in graphene membranes in multiscale modeling","authors":"Michele Curatolo , Ginevra Salerno","doi":"10.1016/j.mechmat.2024.105226","DOIUrl":"10.1016/j.mechmat.2024.105226","url":null,"abstract":"<div><div>Graphene, an atomically thin material renowned for its exceptional properties, plays a pivotal role in several technological applications. This work elucidates critical aspects of graphene research, particularly focusing on the effects of its transfer onto suitable substrates. Indeed, from the mechanical point of view the transfer process induces self-stresses within the graphene layer. In addition, formidable applications in the field of biosensors, filtration membranes, and special electronic devices are based on precision perforated-graphene. However, perforation introduces localized stress concentrations, altering mechanical behavior and the strength of the graphene membrane.</div><div>In this paper, the effects of self-stress states on graphene membrane strength are studied through numerical models. Specifically, the mechanical strength of pristine and perforated graphene membranes subjected to different self-stress states is studied at the nanoscale, using a static molecular mechanics model. Then, a suitably calibrated hyper-elastic continuum model is formulated and correlated with the molecular mechanics model to study the mechanical strength at the micron scale, which is the actual scale of the membranes. Results give important insights on the effects of self-stress states in graphene membranes. We found out also that the interaction distance between holes is strongly influenced by the self-stress state.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"201 ","pages":"Article 105226"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150923","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

Criteria for mode shape tracking in Micropolar-Cosserat periodic panels

IF 3.4 3区材料科学

Mechanics of Materials Pub Date : 2025-02-01 DOI: 10.1016/j.mechmat.2024.105213

S.K. Singh , A. Banerjee , A.A. Baxy , R.K. Varma

{"title":"Criteria for mode shape tracking in Micropolar-Cosserat periodic panels","authors":"S.K. Singh , A. Banerjee , A.A. Baxy , R.K. Varma","doi":"10.1016/j.mechmat.2024.105213","DOIUrl":"10.1016/j.mechmat.2024.105213","url":null,"abstract":"<div><div>This study communicates the dispersion nature and motion of propagating waves on the periodic panels resulting from the variation of the Micropolar-Cosserat (MC) parameters such as characteristic length-scale and Cosserat shear modulus. The non-dimensionalization of the system determines the independent parameters for the MC beam model in order to examine the motion of the micro-rotational as well as flexural wave modes. A periodic boundary condition based on Bloch-Floquet’s theorem is employed on the unit cell to maintain the periodicity and assess the eigenvalue domain within the transfer matrix approach. A significant part of this enlightening theoretical comprehension regarding veering, locking, and coupling is elucidated by tracking the mode shapes within the Modal Assurance Criteria (MAC), which is the prime novelty of this research. Periodically pass-band and partial bandwidth are also examined to build up confidence concerning the complex and real wave modes, respectively. A slight variation of MC parameters can dramatically alter the emergence of veering, locking, and coupling phenomena, even 1% only. The band gap (BG) calculated through the two-dimensional (2-D) Finite Element Analysis (FEM) corroborates well with the reduced one-dimensional (1-D) MC periodic panels.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"201 ","pages":"Article 105213"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150924","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

Machine learning-boosted nonlinear homogenization

IF 3.4 3区材料科学

Mechanics of Materials Pub Date : 2025-02-01 DOI: 10.1016/j.mechmat.2024.105229

Mikhael Tannous , Chady Ghnatios , Olivier Castelnau , Pedro Ponte Castañeda , Francisco Chinesta

{"title":"Machine learning-boosted nonlinear homogenization","authors":"Mikhael Tannous , Chady Ghnatios , Olivier Castelnau , Pedro Ponte Castañeda , Francisco Chinesta","doi":"10.1016/j.mechmat.2024.105229","DOIUrl":"10.1016/j.mechmat.2024.105229","url":null,"abstract":"<div><div>Previous research has established nonlinear homogenization as an efficient technique for deriving macroscopic constitutive relations and field statistics in heterogeneous (i.e. composite) materials. This method involves optimal linearization of the nonlinear composite, resulting in a best linear comparison composite that shares identical microstructure and field statistics with the nonlinear material. However, the computational time associated with this method increases as the fidelity of the material representation improves, limiting its practical implementation in commercial finite element software for large-scale structural calculations in which a Representative Volume Element must be considered at each integration point. To overcome this limitation without sacrificing precision or efficiency, machine learning can be employed to develop a digital twin of the homogenization-based constitutive law. This approach enables real-time prediction of macroscopic material behavior while maintaining accuracy. The effectiveness of this approach has been demonstrated for two-phase composites with nonlinear power-law constitutive relations, and it has been successfully extended to model the complex three-dimensional behavior of viscoplastic polycrystals. In the latter case, a significant reduction in computational time has been achieved without compromising the precision of nonlinear homogenization method outputs.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"201 ","pages":"Article 105229"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

3D auxetic metamaterials with tunable multistable mechanical properties

IF 3.4 3区材料科学

Mechanics of Materials Pub Date : 2025-02-01 DOI: 10.1016/j.mechmat.2024.105217

Bojian Zhang , Zhiqiang Meng , Yifan Wang

{"title":"3D auxetic metamaterials with tunable multistable mechanical properties","authors":"Bojian Zhang , Zhiqiang Meng , Yifan Wang","doi":"10.1016/j.mechmat.2024.105217","DOIUrl":"10.1016/j.mechmat.2024.105217","url":null,"abstract":"<div><div>Multistable mechanical metamaterials have been extensively studied for their unique mechanical behaviors, including snap-through capability, variable stiffness, and recoverable cushioning properties. Similarly, auxetic metamaterials, known for their ability to uniformly distribute stress, absorb energy efficiently, and withstand complex loading conditions, offer significant potential for the development of safer, more durable, and efficient materials. Despite significant progress in the field, a key challenge remains unaddressed: the effective integration of both multistability and auxetic properties in 3-dimensional (3D) mechanical metamaterials. This integration has not been fully explored, particularly regarding the realization of programmable, directionally tunable behaviors that combine the advantages of a negative Poisson's ratio and multiple stable states. Here, we introduce a 3D mechanical metamaterial composed of isotropic bistable auxetic blocks (BABs) fabricated using bi-material 3D printing technology. Mechanical models are developed to assess the influence of geometrical parameters on the mechanical responses of BAB, which are validated through both numerical simulation and experimental results. By assembling these proposed BABs, we demonstrate that 3D mechanical metamaterials with multistable auxetic behavior can be designed and fabricated. Our results show that these metamaterials exhibit sequential deformation under applied loading and possess programmable mechanical properties. These findings open new avenues for the design and development of 3D multistable auxetic metamaterials with programmable mechanical behaviors, offering promising applications in areas such as energy absorption, deployable structures, soft robotics, and more.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"201 ","pages":"Article 105217"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150919","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

An FFT based chemo-mechanical framework with fracture: Application to mesoscopic electrode degradation

IF 3.4 3区材料科学

Mechanics of Materials Pub Date : 2025-02-01 DOI: 10.1016/j.mechmat.2024.105211

Gabriel Zarzoso , Eduardo Roque , Francisco Montero-Chacón , Javier Segurado

{"title":"An FFT based chemo-mechanical framework with fracture: Application to mesoscopic electrode degradation","authors":"Gabriel Zarzoso , Eduardo Roque , Francisco Montero-Chacón , Javier Segurado","doi":"10.1016/j.mechmat.2024.105211","DOIUrl":"10.1016/j.mechmat.2024.105211","url":null,"abstract":"<div><div>An FFT based method is proposed to simulate chemo-mechanical problems at the microscale including fracture, specially suited to predict crack formation during the intercalation process in batteries. The method involves three fields fully coupled, concentration, deformation gradient and damage. The mechanical problem is set in a finite strain framework and solved using Fourier Galerkin for non-linear problems in finite strains. The damage is modeled with Phase Field Fracture using a stress driving force. This problem is solved in Fourier space using conjugate gradient with an ad-hoc preconditioner. The chemical problem is modeled with the second Fick’s law and physically based chemical potentials, is integrated using backward Euler and is solved by Newton–Raphson combined with a conjugate gradient solver. Buffer layers are introduced to break the periodicity and emulate Neumann boundary conditions for incoming mass flux. The framework is validated against Finite Elements the results of both methods are very close in all the cases. Finally, the framework is used to simulate the fracture of active particles of graphite during ion intercalation. The method is able to solve large problems at a reduced computational cost and reproduces the shape of the cracks observed in real particles.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"201 ","pages":"Article 105211"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150921","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

Symmetry breaking and nonreciprocity in nonlinear phononic crystals: Inspiration from atomic interactions

IF 3.4 3区材料科学

Mechanics of Materials Pub Date : 2025-02-01 DOI: 10.1016/j.mechmat.2024.105231

Seyed Mohammad Hosein Abedy Nejad, Mir Masoud Seyyed Fakhrabadi

{"title":"Symmetry breaking and nonreciprocity in nonlinear phononic crystals: Inspiration from atomic interactions","authors":"Seyed Mohammad Hosein Abedy Nejad, Mir Masoud Seyyed Fakhrabadi","doi":"10.1016/j.mechmat.2024.105231","DOIUrl":"10.1016/j.mechmat.2024.105231","url":null,"abstract":"<div><div>Symmetry breaking is an emerging trend in metamaterial research. To date, studies have primarily focused on breaking spatial or temporal symmetries through active interactions, leading to promising applications in waveguiding and manipulation. In this paper, we explore symmetry-breaking mechanisms by implementing the Morse-type potential function, resulting in asymmetric stiffness with different behaviors in tension and compression. We further answer whether this type of asymmetric stiffness leads to nonreciprocal behavior. Hence, our research focuses on wave propagation in nonlinear one- and two-dimensional phononic crystals using the Morse potential function. Our methodology then involves extracting dispersion curves using the semi-analytic method of multiple scales and numerical Spectro-spatial analysis. Our findings reveal interesting characteristics, including the formation of a bandgap at lower wave numbers (low-frequency waves), asymmetric wave propagation, and wave amplification. These results hold substantial potential for the design of advanced waveguides and wave filters.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"201 ","pages":"Article 105231"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150926","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

Modeling stress evolution during fiber oxidation

IF 3.4 3区材料科学

Mechanics of Materials Pub Date : 2025-02-01 DOI: 10.1016/j.mechmat.2024.105225

Isaac Duan, Victoria L. Christensen, Matthew R. Begley, Frank W. Zok

{"title":"Modeling stress evolution during fiber oxidation","authors":"Isaac Duan, Victoria L. Christensen, Matthew R. Begley, Frank W. Zok","doi":"10.1016/j.mechmat.2024.105225","DOIUrl":"10.1016/j.mechmat.2024.105225","url":null,"abstract":"<div><div>The paper examines stress evolution in oxidizing ceramic fibers, specifically focusing on silica scales growing on silicon carbide (SiC) fibers. Oxidation leads to the formation of oxide scales that induce significant stresses due to the molar volume expansion during oxidation. These stresses can lead to cracking of the oxide scale and reduction in fiber strength. To model these phenomena, an analytical framework is developed to describe stress evolution in cylindrical fibers. The elastic-creep behavior of the oxide is represented by a viscoelastic Maxwell model. By solving the governing ordinary differential equations (ODEs) and applying material properties relevant to the oxidation of SiC fibers, the study provides insights into the interplay between oxide growth, stress relaxation, and fiber geometry. The findings show that a single material parameter—encompassing fiber radius, oxidation rate, and oxide viscosity—dominates the stress evolution. The study also reveals approximate closed-form solutions for hoop and axial stresses, which match well with results from finite element analyses. These stresses are found to depend strongly on environmental conditions, with higher stress developing in steam compared to dry air. The results provide new insights into potential stress-induced fracture in oxidizing SiC fibers, with implications for high-temperature applications of ceramic materials.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"201 ","pages":"Article 105225"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143151595","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 novel elastoplastic impact contact model for thin orthotropic layer

IF 3.4 3区材料科学

Mechanics of Materials Pub Date : 2025-02-01 DOI: 10.1016/j.mechmat.2024.105214

Si-Yu Wu, Xu-Hao Huang

{"title":"A novel elastoplastic impact contact model for thin orthotropic layer","authors":"Si-Yu Wu, Xu-Hao Huang","doi":"10.1016/j.mechmat.2024.105214","DOIUrl":"10.1016/j.mechmat.2024.105214","url":null,"abstract":"<div><div>A complex stress state is often an obstacle in obtaining analytical solutions to elastoplastic contact problems of orthotropic structural materials. In this study, an analytical model is presented for investigating the impact contact between a rigid body and a thin orthotropic layer situated on a rigid foundation. By assuming that the local indentation during impact contact is due to the elastoplastic deformation, a theoretical study is carried out to predict the contact response of the orthotropic layer, which obeys an elastic-perfectly plastic stress-strain law. A relationship between contact force and indentation is derived, and the coefficient governing the rebound response is determined. The presented results show generally good agreement with the experimental and numerical results available in the literature. The impact contact model can also be utilized in the impact response analysis of coated structures. Parametric analysis results indicate that the elastic model tends to overestimate the impact resistance of thin layers. The elastoplastic contact law can accurately account for the decrease in contact force due to plastic indentation and permanent deformation. Moreover, the yield strength significantly influences the impact contact time and the permanent indentation deformation of the thin-layer structure.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"201 ","pages":"Article 105214"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150917","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