International Journal of Solids and Structures最新文献

{"title":"Ionization induced by fluid–solid interaction during hypervelocity impact","authors":"Shafquat T. Islam ,&nbsp;Aditya Narkhede ,&nbsp;Paul D. Asimow ,&nbsp;John G. Michopoulos ,&nbsp;Kevin Wang","doi":"10.1016/j.ijsolstr.2025.113278","DOIUrl":"10.1016/j.ijsolstr.2025.113278","url":null,"abstract":"<div><div>This paper presents a computational model to represent and investigate hypervelocity impacts that occur in an atmospheric environment, focusing on energy partitions and impact-induced ionization. The computational domain includes the projectile, the target, and the ambient gas. The physical model combines the compressible Navier–Stokes equations, a complete thermodynamic equation of state (EOS) for each material, and a non-ideal, multi-species Saha equation for ionization prediction. Material interfaces are tracked using an extended two-equation level set method, and the interfacial mass, momentum, and energy fluxes are computed by the FIVER (FInite Volume method with Exact multi-material Riemann problems) method. Using this model, the impact of tantalum on soda-lime glass (SLG) within argon gas is analyzed. Shock compression experiments are conducted to capture the thermodynamics of SLG under high pressure and temperature, yielding shock Hugoniot data up to <span><math><mrow><mn>112</mn><mspace></mspace><mi>GPa</mi></mrow></math></span> and 5300 K. This data is used to calibrate a Noble-Abel stiffened gas EOS. Impact simulations are performed with initial velocity ranging from <span><math><mrow><mn>3</mn><mspace></mspace><mtext>km</mtext><mo>/</mo><mtext>s</mtext></mrow></math></span> to <span><math><mrow><mn>7</mn><mspace></mspace><mtext>km</mtext><mo>/</mo><mtext>s</mtext></mrow></math></span>. Time histories of the pressure, temperature, and plasma density fields are compared across the three materials. Less than 1% of the total impact energy is transferred to the ambient gas, yet its specific internal energy is of the same order of magnitude as that of the projectile and target. Argon gas exhibits higher temperature and plasma density than SLG and tantalum. The ionization of SLG is found to be highly selective, with the metallic elements contributing over 99.9% of the plasma’s charged particles despite comprising less than 15% of the molar composition. In general, the results suggest that the plasma’s density and energy depend on both impact velocity and the material combination, including the ambient gas. The plasma’s composition further reflects the properties (e.g., ionization energies) of the chemical elements in each material.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"312 ","pages":"Article 113278"},"PeriodicalIF":3.4,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419817","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}

{"title":"A directional contraction method to model sand-based binder jet 3D printed materials","authors":"Elodie Donval ,&nbsp;Matti Schneider ,&nbsp;Hannes Grimm-Strele ,&nbsp;Michael Godehardt ,&nbsp;Raphael Burger ,&nbsp;Philipp Lechner ,&nbsp;Daniel Günther ,&nbsp;Heiko Andrä","doi":"10.1016/j.ijsolstr.2025.113260","DOIUrl":"10.1016/j.ijsolstr.2025.113260","url":null,"abstract":"<div><div>The development of binder-jet sand-based 3D printing allows a quick design of complex parts for foundry molds. To ensure a good quality of casting, the mold must feature some specific mechanical, thermal and transport properties. In that context, a reliable modeling approach for the sand-core material provides a less expensive alternative to extended experimental campaigns. In the present paper, we propose a physics-based microstructure generation approach that is able to capture the experimentally observed anisotropy of the sand-binder composite. The corresponding packing algorithm features a directional contraction of the unit cell that mimics the layer-by-layer deposition of the sand. We also introduce an improved, grid-free approach to add binder between the grains. After the microstructure generation process, we compute the apparent stiffness and permeability on the generated microstructure, and show that these apparent properties are transversely isotropic in the vertical direction. We provide a parametric study on some parameters of interest, such as the volume fraction of binder or the layer thickness. Finally, the results obtained through our modeling approach are compared to experimental results available in the literature. These comparisons show that the anisotropy induced by our microstructure generation approach is similar to the one experimentally observed.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"312 ","pages":"Article 113260"},"PeriodicalIF":3.4,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437434","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}

{"title":"Residual stretch-based model for describing fatigue life of aged elastomers","authors":"Moussa Naït Abdelaziz ,&nbsp;Andreas Hottin ,&nbsp;Reda Kadri ,&nbsp;Naima Rezig ,&nbsp;Abderrahim Talha ,&nbsp;Tassadit Bellahcene ,&nbsp;Georges Ayoub ,&nbsp;Méziane Aberkane","doi":"10.1016/j.ijsolstr.2025.113284","DOIUrl":"10.1016/j.ijsolstr.2025.113284","url":null,"abstract":"<div><div>This work presents a novel approach for assessing the impact of thermo-oxidative aging on the fatigue properties of elastomeric materials. Beginning at the microscale, where macromolecular chains undergo shortening through crosslinking, the approach postulates the existence of a residual stretch at the macroscale proportional to aging severity. The proposed approach suggests that aging increases the effective applied load, necessitating correction to accommodate the additional strain.</div><div>This hypothesized microscopic mechanism manifests as a residual stretch that depends on the density of elastically active chains. This framework enables the construction of a unified Wöhler curve that spans both low-cycle and high-cycle fatigue, based on the Bastenaire model. Further validation using data from the literature highlights the effectiveness of this novel empirical approach.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"312 ","pages":"Article 113284"},"PeriodicalIF":3.4,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143429985","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}

{"title":"A new constitutive model of concrete developed in the framework of damage and multi-surface plasticity: Theory and verification","authors":"Drago Žarković,&nbsp;Đorđe Jovanović","doi":"10.1016/j.ijsolstr.2025.113281","DOIUrl":"10.1016/j.ijsolstr.2025.113281","url":null,"abstract":"<div><div>Within this study, a new constitutive model of concrete for local analysis is formulated based on the uncoupled combination of the theory of plasticity and damage mechanics. The chosen yield function in the theory of plasticity part is uniquely adapted, with separate hardening variables corresponding to the compression and tension meridians in the principal stress space, aiming to describe independent material hardening under cyclic loading. An essential aspect of concrete behaviour, the closure and reopening of existing cracks under cyclic loading, is encompassed by introducing a secondary yield surface into the formulation. The damage mechanics part of the model is formulated by decomposing the stress tensor into positive and negative parts, introducing two damage variables for tension and compression. Introducing a specific exponential function for the damage evolution rule ensures an adequate model response on both the compression and tension sides of the softening response. This function is calibrated according to the concrete strength to simulate the more ductile behaviour of lower-grade concrete and the more brittle behaviour of higher-grade concrete without introducing additional model parameters. The model’s formulation ensures an objective response when modelling structures with different finite element mesh sizes.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"312 ","pages":"Article 113281"},"PeriodicalIF":3.4,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419851","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}

{"title":"A dimensionless study of Functionally Graded Material membranes wrinkling using the Asymptotic Numerical Method","authors":"Siham Khalil ,&nbsp;Oussama Elmhaia ,&nbsp;Abdellah Hamdaoui ,&nbsp;Bouazza Braikat ,&nbsp;Heng Hu ,&nbsp;Adnane Boukamel ,&nbsp;Noureddine Damil","doi":"10.1016/j.ijsolstr.2025.113259","DOIUrl":"10.1016/j.ijsolstr.2025.113259","url":null,"abstract":"<div><div>In this work, by making dimensionless the equations of the variational problem governing the wrinkling of Functionally Graded Material (FGM) membranes under tension, we highlight five dimensionless parameters that control the appearance and disappearance of wrinkles. These parameters are related to the aspect ratios, the properties of the FGM membrane, and the applied loading. The other two parameters are related to the properties of the FGM membrane which represent the ratio between the Young’s moduli of the upper and lower surfaces of the FGM membrane, and <span><math><mi>p</mi></math></span> describes the variation of Young’s modulus across the thickness of the FGM membrane. The fifth parameter is related to the imposed loading and the geometric and material characteristics of the membrane. For this purpose, we will use the full expression for thin-membrane deformation without approximating membrane effects, employing an extended Föppl von Kármán (eFvK) model. The nonlinear equations will be solved numerically using the Asymptotic Numerical Method (ANM). Several numerical simulations are presented to study the effects of these dimensionless parameters on the appearance and disappearance of wrinkles.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"311 ","pages":"Article 113259"},"PeriodicalIF":3.4,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143379105","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}

{"title":"Strong C1-coupling multi-patch isogeometric topology optimization of complex structures for strain gradient problems","authors":"Xing Chen ,&nbsp;Julien Yvonnet ,&nbsp;Song Yao ,&nbsp;Jie Hu ,&nbsp;Yupeng Huang","doi":"10.1016/j.ijsolstr.2025.113256","DOIUrl":"10.1016/j.ijsolstr.2025.113256","url":null,"abstract":"<div><div>This paper presents a novel framework for strong <span><math><msup><mrow><mi>C</mi></mrow><mrow><mn>1</mn></mrow></msup></math></span>-coupling multi-patch isogeometric topology optimization, tailored for addressing strain gradient problems governed by fourth-order partial differential equations (PDEs), including strain gradient elasticity and flexoelectric effects. The proposed method achieves <span><math><msup><mrow><mi>C</mi></mrow><mrow><mn>1</mn></mrow></msup></math></span>-continuity across multi-patch domains by reconstructing basis functions at patch interfaces, ensuring seamlessly matching first derivatives. We validated this method through structural analyses and optimizations on single and multi-patch domains with and without strain gradient elasticity. The <span><math><msup><mrow><mi>C</mi></mrow><mrow><mn>1</mn></mrow></msup></math></span>-locking phenomenon, attributed to over-constrained solution spaces at patch interfaces, are systematically investigated. Order elevation of basis functions effectively mitigates <span><math><msup><mrow><mi>C</mi></mrow><mrow><mn>1</mn></mrow></msup></math></span>-locking by providing sufficient degrees of freedom. Additionally, the optimization framework incorporates advanced filtering techniques to handle unstructured grids in multi-patch configurations. Neighbor domain filtering demonstrates stability but incurs high computational costs, whereas Helmholtz PDE filtering offers greater efficiency but requires careful tuning to mitigate oscillatory behavior. The practical utility of the framework is demonstrated through case studies involving the optimization of a connecting rod under strain gradient elasticity and a flexoelectric beam with circular voids. These examples highlight the framework’s potential in addressing complex engineering challenges, offering smoother solutions, reducing stress concentrations in strain gradient elasticity, and enhancing electromechanical coupling in flexoelectric materials. This work significantly broadens the scope of structural optimization for complex systems governed by high-order PDEs, paving the way for more efficient and accurate design methods in advanced engineering applications.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"311 ","pages":"Article 113256"},"PeriodicalIF":3.4,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143369759","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}

{"title":"Dislocation dipoles in a square hollow prismatic nanowire embedded in an infinite-size matrix","authors":"Jérôme Colin","doi":"10.1016/j.ijsolstr.2025.113258","DOIUrl":"10.1016/j.ijsolstr.2025.113258","url":null,"abstract":"<div><div>The introduction of dipoles of edge dislocations symmetrically displayed with respect to the center of a composite structure made of a square hollow prismatic nanowire embedded in an infinite-size matrix has been theoretical investigated when misfit strain is present in both phases. When the dipole is composed of dislocations of Burgers vectors such that the misfit strain cannot be screened by the dislocations lying into the interfaces, the gliding and climbing components of the Peach–Koehler force applied on the dislocations have been calculated and the unstable equilibrium positions of the dipole have been determined versus the misfit strain and nanowire geometric parameters. When the Burgers vectors are such that the misfit strain can be released when the dislocations have reached the interfaces, the formation of the dipole from the matrix center to the inner matrix-nanowire interfaces has been analyzed from an energy variation calculation. A critical size of the nanowire for which the dislocation formation in the inner interfaces is favorable at a stable position has been finally determined versus the misfit parameter.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"311 ","pages":"Article 113258"},"PeriodicalIF":3.4,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143369760","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}

{"title":"Deformation and stability of initially stressed hyperelastic plates","authors":"Soumya Mukherjee ,&nbsp;Prashant Saxena","doi":"10.1016/j.ijsolstr.2025.113253","DOIUrl":"10.1016/j.ijsolstr.2025.113253","url":null,"abstract":"<div><div>Initial/residual stress is inherent in nearly all natural and engineered structures. This paper presents a comprehensive theory for modelling residually stressed, growing plates. By constructing a two-dimensional representation of three-dimensional solid mechanics, we avoid any need for prior assumptions about deformation fields. This approach reformulates both the initial stress fields and deformation gradients in three-dimensional space through planar quantities, yielding a set of plate equations that govern their interactions. This framework enables modelling of various naturally and artificially generated planar structures with residual stress and growth, such as plant leaves and additively manufactured plates.</div><div>To explore the wrinkling instabilities that often arise in such structures, we derive a principal solution for an initially stressed, growing plate supported by Winkler foundations. We then apply linear perturbation to examine bifurcation phenomena, solving the resulting governing equations analytically and computationally. The numerical scheme is validated with analytical results and shows promise for solving more geometrically complex instability problems.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"311 ","pages":"Article 113253"},"PeriodicalIF":3.4,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143379104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Free vibration and buckling analysis of simply supported rectangular nano-plates: A closed-form solution based on nonlocal 3D elasticity theory","authors":"Parvaneh Nateghi-Babagi ,&nbsp;Bahram Navayi-Neya ,&nbsp;Morteza Eskandari-Ghadi","doi":"10.1016/j.ijsolstr.2025.113261","DOIUrl":"10.1016/j.ijsolstr.2025.113261","url":null,"abstract":"<div><div>Free vibration and stability analysis of simply supported rectangular nano-plates is presented based on Eringen’s nonlocal elasticity theory, where an exact solution is proposed to determine natural frequencies and critical buckling loads of nonlocal plates. Accordingly, a set of new scalar potential functions is introduced to decouple either coupled equations of motion or buckling equations. Afterward, the method of separation of variables is utilized to solve PDEs governing potential functions in each case. Followingly, solutions of potential functions and displacements are expressed in the form of double Fourier series. However, the accuracy of the present method is confirmed by comparing the obtained results with the simpler case of molecular dynamic simulation, and other nonlocal methods. It is also noteworthy that this study presents a novel method with high accuracy and precision which facilitates analysis of nano systems. The developed scheme can be useful for vibration and stability analysis of two- and three-dimensional systems in nano dimensions. Small-scale, aspect ratio and thickness ratio effects in vibration and stability analysis are also investigated. Final results demonstrate that the thickness ratio has a significant effect on the vibrational and stability behavior of nanoplates, which is increased by considering non-local relationships in three dimensions.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"312 ","pages":"Article 113261"},"PeriodicalIF":3.4,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419997","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}

{"title":"Discussion of: “A numerical study on tensile strength of low-density Kagome networks made of brittle fibers” by S.M. Mane, K.M. Liechti, R. Huang [Int. J. Solids Struct. 302 (2024) 112987]","authors":"Michael Ryvkin","doi":"10.1016/j.ijsolstr.2025.113274","DOIUrl":"10.1016/j.ijsolstr.2025.113274","url":null,"abstract":"","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"311 ","pages":"Article 113274"},"PeriodicalIF":3.4,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471697","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}