International Journal for Numerical Methods in Engineering最新文献_第6页

Finite element approximation of stabilized mixed models in finite strain hyperelasticity involving displacements and stresses and/or pressure—An overview of alternatives 涉及位移、应力和/或压力的有限应变超弹性中稳定混合模型的有限元近似--替代方案概览

IF 2.7 3区工程技术

International Journal for Numerical Methods in Engineering Pub Date : 2024-06-10 DOI: 10.1002/nme.7540

Ramon Codina, Inocencio Castañar, Joan Baiges

引用次数: 0

Generalized particle domain method: An extension of material point method generates particles from the CAD files 广义粒子域法：材料点法的扩展，从 CAD 文件中生成粒子

IF 2.7 3区工程技术

International Journal for Numerical Methods in Engineering Pub Date : 2024-06-06 DOI: 10.1002/nme.7537

Changsheng Wang, Genwei Dong, Zhigong Zhang, Haiyang Li, Zhangming Wu

{"title":"Generalized particle domain method: An extension of material point method generates particles from the CAD files","authors":"Changsheng Wang, Genwei Dong, Zhigong Zhang, Haiyang Li, Zhangming Wu","doi":"10.1002/nme.7537","DOIUrl":"10.1002/nme.7537","url":null,"abstract":"<div>\u0000 \u0000 <p>In this paper, a generalized particle domain method (GPDM) is proposed and developed within the framework of the convected particle domain interpolation method. This new method generates particles directly from non-uniform rational B-spline (NURBS)-based CAD file of a continuum body. The particle domain corresponds to a NURBS element even for trimmed elements of solids with complex geometries. The shape functions and the gradient of shape functions are evaluated using NURBS basis functions to map material properties between particles and grid nodes. It approves that this proposed GPDM can track the domain of particles accurately and avoid the issue of cell-crossing instability. Several numerical examples are presented to demonstrate the high performance of this proposed new particle domain method. It is shown that the results obtained using the proposed GPDM are consistent with the experimental data reported in the literature. Further development of the generalized particle domain method can provide a link to the material point method and isogeometric analysis.</p>\u0000 </div>","PeriodicalId":13699,"journal":{"name":"International Journal for Numerical Methods in Engineering","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141376558","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

3-D impulse-based level-set method for granular flow modeling 用于颗粒流建模的基于脉冲的三维水平集方法

IF 2.7 3区工程技术

International Journal for Numerical Methods in Engineering Pub Date : 2024-06-06 DOI: 10.1002/nme.7546

Peng Tan, Hasitha S. Wijesuriya, Nicholas Sitar

引用次数: 0

Domain decomposition methods and acceleration techniques for the phase field fracture staggered solver 相场断裂交错求解器的域分解方法和加速技术

IF 2.7 3区工程技术

International Journal for Numerical Methods in Engineering Pub Date : 2024-06-05 DOI: 10.1002/nme.7544

Johann Rannou, Christophe Bovet

{"title":"Domain decomposition methods and acceleration techniques for the phase field fracture staggered solver","authors":"Johann Rannou, Christophe Bovet","doi":"10.1002/nme.7544","DOIUrl":"10.1002/nme.7544","url":null,"abstract":"<p>The phase field modeling of fracture is able to simulate the nucleation and the propagation of complex crack patterns. However, the relatively small internal lengths that are required usually lead to very fine meshes and high computational costs, especially for three-dimensional applications. In the present work, additional cost also comes from the implicit dynamics regularization of unstable crack propagations which potentially leads to a large variation of time steps when switching from quasi-static to dynamic regimes. To reduce the time to solution in this context, this study proposes a domain decomposition framework and acceleration techniques for the phase field fracture staggered solver. The displacement subproblem and the phase field one are solved with parallel domain decomposition solvers. Dual domain decomposition methods provide low cost preconditioner well adapted to the phase field subproblem. For displacement subproblems undergoing unstable crack propagations, primal domain decomposition methods are preferred to be less sensitive to the treatment of floating substructures. Preconditioners performances are assessed and scalability studies over academic test cases, up to 324 subdomains, are presented. Finally, the robustness of the approach is illustrated on two semi-industrial simulations.</p>","PeriodicalId":13699,"journal":{"name":"International Journal for Numerical Methods in Engineering","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/nme.7544","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141382927","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}

引用次数: 0

Hybrid equilibrium formulation with adaptive element side orientation for cohesive crack prediction 用于内聚裂纹预测的自适应元素侧向混合平衡公式

IF 2.7 3区工程技术

International Journal for Numerical Methods in Engineering Pub Date : 2024-06-02 DOI: 10.1002/nme.7543

Francesco Parrinello

{"title":"Hybrid equilibrium formulation with adaptive element side orientation for cohesive crack prediction","authors":"Francesco Parrinello","doi":"10.1002/nme.7543","DOIUrl":"10.1002/nme.7543","url":null,"abstract":"<p>The present article proposes an hybrid equilibrium element (HEE) formulation for the prediction of cohesive fracture formation and propagation with the crack modelled by extrinsic interface embedded at element sides. The hybrid equilibrium element formulation can model high order (quadratic, cubic and quartic) stress fields which strongly satisfy homogeneous equilibrium equations, inter-element and boundary equilibrium equations. The HEE can implicitly model both the initially rigid behaviour of an extrinsic interface and its debonding condition with separation displacement and softening. The extrinsic interface is embedded at the element sides and its behaviour is governed by means of the same degrees of freedom of HEE (<i>generalized stresses</i>), without any additional degree of freedom. The proposed extrinsic cohesive model is developed in the thermodynamic framework of damage mechanics. The proposed crack propagation criterion states that crack grows when the maximum principal stress reaches the tensile strength value, in a direction orthogonal to the principal stress direction. The crack is embedded at an element side and the mesh around crack tip is adapted, by rotation of the element sides, in order to have the interface aligned to the crack growth direction. Three classic two-dimensional problems of fracture propagation are numerically reproduced and the results compared to the experimental data or to the other numerical results.</p>","PeriodicalId":13699,"journal":{"name":"International Journal for Numerical Methods in Engineering","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141273586","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

Caveats of three direct linear solvers for finite element analyses 用于有限元分析的三种直接线性求解器的注意事项

IF 2.7 3区工程技术

International Journal for Numerical Methods in Engineering Pub Date : 2024-05-30 DOI: 10.1002/nme.7545

Dorival M. Pedroso

引用次数: 0

A mixed nonlocal finite element model for thermo-poro-elasto-plastic simulation of porous media with multiphase fluid flow 多相流体流动多孔介质热孔弹性塑性模拟的混合非局部有限元模型

IF 2.7 3区工程技术

International Journal for Numerical Methods in Engineering Pub Date : 2024-05-30 DOI: 10.1002/nme.7466

M. Komijani

{"title":"A mixed nonlocal finite element model for thermo-poro-elasto-plastic simulation of porous media with multiphase fluid flow","authors":"M. Komijani","doi":"10.1002/nme.7466","DOIUrl":"10.1002/nme.7466","url":null,"abstract":"<div>\u0000 \u0000 <p>A new mixed nonlocal finite element framework is developed for nonlinear thermo-poro-elasto-plastic simulation of porous media with multiphase pore fluid flow and thermal coupling. The solid-fluid interaction is accounted for using the mixture theory of Biot based on the volume fractions concept. Different sources of nolinearities arising from the multiphase fluid flow effects, advective-diffusive heat transfer, inelastic deformation, fluid flux injection induced mechanical tractions, solid skeleton deformation permeability dependence, and temperature dependent viscosity are included in developing a robust numerical solver for the targeted coupled multiphysics problem. To address the effect of microstructure in inelastic localized deformation behaviour with dilational softening, a nonlocal plasticity model is proposed based on a characteristic length scale which rectifies the non-physical pathological mesh dependence problem encountered in conventional plasticity. The accuracy and strength of the developed model is shown with comparing the obtained numerical results of a benchmark bilateral compression test with existing published data in the literature. To show the versatility and robustness of the developed computational framework in modelling the geomechanics of real-case engineering practices, large scale thermo-hydro-mechanical (THM) subsurface stimulation processes with applications in enhanced oil recovery (EOR) are effectively simulated and the targeted enhanced recovery and performances are demonstrated. The current formulation does not include phase transformation modelling capability, and therefore, the developed models may not be applicable for simulation of the engineering processes that involve phase change behaviour (e.g., steam injection).</p>\u0000 </div>","PeriodicalId":13699,"journal":{"name":"International Journal for Numerical Methods in Engineering","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141198263","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

Dipole-based BEM formulation for three-dimensional cohesive crack propagation modelling 基于偶极子的 BEM 三维内聚裂纹扩展建模方法

IF 2.7 3区工程技术

International Journal for Numerical Methods in Engineering Pub Date : 2024-05-30 DOI: 10.1002/nme.7535

Luís Philipe Ribeiro Almeida, Edson Denner Leonel

引用次数: 0

A decoupled probabilistic constrained topology optimization method based on the constraint shift 基于约束移动的解耦概率约束拓扑优化方法

IF 2.7 3区工程技术

International Journal for Numerical Methods in Engineering Pub Date : 2024-05-27 DOI: 10.1002/nme.7541

Kangjie Li

{"title":"A decoupled probabilistic constrained topology optimization method based on the constraint shift","authors":"Kangjie Li","doi":"10.1002/nme.7541","DOIUrl":"10.1002/nme.7541","url":null,"abstract":"<p>Topology optimization (TO) has recently emerged as an advanced design method. To ensure practical reliability in the design process, it is imperative to incorporate considerations of uncertainty. Consequently, performing reliability analysis (RA) during the design phase becomes necessary. However, RA itself constitutes an optimization problem. Combining these two optimization problems can result in inefficiency. To address this challenge, we propose a decoupled approach that integrates deterministic topology optimization (DTO) and RA cycles. The reliability-based stress-constrained TO (RBSCTO) problem is considered in this paper. The DTO constraint is derived based on shifting vectors derived from the previous cycle's RA outcomes, enabling low-reliability constraint shift towards the feasible direction. The DTO is solved based on solid-isotropic-material-with-penalization (SIMP) and augmented Lagrangian method. Meanwhile, the optimization problem in RA is addressed using finite differences and the interior point method. To reduce the errors resulting from linear approximation and optimization in RA when the target reliability is very low, an outlier handling method is employed. Meantime, we utilize a probabilistic neural network to enhance the efficiency of reliability assessment. Comparative studies against traditional methods across four RBSCTO tasks are demonstrated to validate its effectiveness. Monte Carlo simulations are used to validate the reliability of results.</p>","PeriodicalId":13699,"journal":{"name":"International Journal for Numerical Methods in Engineering","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141166094","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

Quadrilateral surface mesh generation with improved quality by combination of triangles 通过三角形组合生成质量更高的四边形曲面网格

IF 2.7 3区工程技术

International Journal for Numerical Methods in Engineering Pub Date : 2024-05-27 DOI: 10.1002/nme.7539

Jingchen Gao, Zhoufang Xiao, Chenhao Xu, Shuwei Shen, Gang Xu

{"title":"Quadrilateral surface mesh generation with improved quality by combination of triangles","authors":"Jingchen Gao, Zhoufang Xiao, Chenhao Xu, Shuwei Shen, Gang Xu","doi":"10.1002/nme.7539","DOIUrl":"10.1002/nme.7539","url":null,"abstract":"<p>Quadrilateral mesh is preferred in numerical simulation compared with triangular mesh, but high-quality and robust quadrilateral mesh generation for complex geometries remains a challenging problem. In this study, an enhanced indirect method by the combination of triangles is proposed for the generation of high-quality quadrilateral mesh. It takes a triangular mesh as the input, and except that the number of elements needs to be even, the triangular mesh can be generated by the commonly used AFT method or Delaunay method. To ensure the quality of the combined quads, a local-global triangular remeshing procedure is conducted first, and size gradation and vertex valence are focused in this step. Then, the well-known Blossom algorithm is used to find the perfect matching triangles for combination. Finally, in order to reduce the number of unnecessary singularities, a connectivity optimization procedure is introduced to replace the irregular elements in local regions with regular elements and thus improve the overall quality of the combined quads. Numerical experiments on meshes in both 2D and 3D cases are presented to demonstrate the effectiveness of the proposed method.</p>","PeriodicalId":13699,"journal":{"name":"International Journal for Numerical Methods in Engineering","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141165802","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