Finite Elements in Analysis and Design最新文献_第3页

Feature-driven topology optimization of continuum structures with tailored octree meshing 基于定制八叉树网格的连续体结构特征驱动拓扑优化

IF 3.5 3区工程技术

Finite Elements in Analysis and Design Pub Date : 2025-02-01 DOI: 10.1016/j.finel.2024.104308

Zhen Liu, Liang Xia

{"title":"Feature-driven topology optimization of continuum structures with tailored octree meshing","authors":"Zhen Liu, Liang Xia","doi":"10.1016/j.finel.2024.104308","DOIUrl":"10.1016/j.finel.2024.104308","url":null,"abstract":"<div><div>To achieve accurate finite element (FE) analysis and to capture intricate geometric features in topology optimization using the feature mapping method, it is essential to apply extreme finely discretized background FE mesh. However, this necessity comes with increased time and memory overheads and may even lead to the failure of solving 3D problems. Consequently, this paper proposes a tailored 2:1 balanced octree meshing algorithm for topology optimization using the feature mapping method. In particular, two strategies are employed to achieve accurate mesh partitioning. The first strategy applies the exact max-min operator, rather than the smooth approximation operator used in the optimization phase, to define union, intersection, and subtraction operations between geometric components. The second strategy combines vertex function evaluation with revised affine arithmetic to rigorously check function transversality. To enhance efficiency in the latter, the function evaluation of the current mesh reuses the evaluation of the identical vertex from the sibling or parent mesh. Concurrently, only active components intersecting the parent mesh undergo checking for the current mesh, eliminating the need to checking all components. Subsequently, only meshes that intersect any one component and whose neighboring meshes share faces (edges in 2D) are balanced and numbered for structural analysis. This measure avoids numerical singularity arising from void elements and reduces extra time and memory requirements. Finally, algorithms for feature-driven topology optimization, including octree meshing, sensitivity analysis, multi-point constraint and the update of design variables using the method of moving asymptotes (MMA), are implemented on an in-house C++ framework. The feasibility and effectiveness of the proposed algorithms are demonstrated by means of benchmark 2D and 3D numerical designs.</div></div>","PeriodicalId":56133,"journal":{"name":"Finite Elements in Analysis and Design","volume":"244 ","pages":"Article 104308"},"PeriodicalIF":3.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142935957","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 arbitrary Lagrangian-Eulerian corotational formulation for nonlinear dynamic analysis of arbitrarily curved viscoelastic beams 任意弯曲粘弹性梁非线性动力分析的任意拉格朗日-欧拉公式

IF 3.5 3区工程技术

Finite Elements in Analysis and Design Pub Date : 2025-02-01 DOI: 10.1016/j.finel.2024.104303

Lanfeng Deng, Mu-Qing Niu, Xin Yang, Yimin Fan, Li-Qun Chen

{"title":"An arbitrary Lagrangian-Eulerian corotational formulation for nonlinear dynamic analysis of arbitrarily curved viscoelastic beams","authors":"Lanfeng Deng, Mu-Qing Niu, Xin Yang, Yimin Fan, Li-Qun Chen","doi":"10.1016/j.finel.2024.104303","DOIUrl":"10.1016/j.finel.2024.104303","url":null,"abstract":"<div><div>In this paper, a three-dimensional arbitrary Lagrangian-Eulerian (ALE) formulation based on the consistent corotational method for flexible structures' large deformation problems is proposed. In contrast with the Lagrangian formulations, the proposed formulation can accurately describe moving boundary and load problems using moving nodes. The ALE formulation for flexible structures with an arbitrarily curved initial geometry is derived for the first time. Moreover, internal and external dampings are integrated into the ALE formulation to consider the energy dissipation induced by the structures' deformation and spatial motion. In addition, the rigid-body motion energy dissipation of the internal damping can be avoided by measuring the element's deformation rate in a corotational frame. Kelvin-Voigt model and the interdependent interpolation element are embedded into the element-independent framework of the corotational method. Then, a general beam element model is established to account for the beam's rotary inertia, viscoelasticity, and shear, bending, torsional, and axial deformations in the ALE formulation. Four examples are provided to validate the proposed formulation. The numerical results obtained using the proposed method are compared with those from the commercial software ANSYS and previously published methods. This comparison illustrates the enhanced efficiency in computation time and computer memory.</div></div>","PeriodicalId":56133,"journal":{"name":"Finite Elements in Analysis and Design","volume":"244 ","pages":"Article 104303"},"PeriodicalIF":3.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142841387","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

Time-domain finite element model of level-dependent nonlinear filter earplug 随电平变化的非线性滤波器耳塞时域有限元模型

IF 3.5 3区工程技术

Finite Elements in Analysis and Design Pub Date : 2025-01-29 DOI: 10.1016/j.finel.2025.104313

Cyril Blondé-Weinmann , Christophe Ruzyla , Sébastien Roth , Pascal Hamery

{"title":"Time-domain finite element model of level-dependent nonlinear filter earplug","authors":"Cyril Blondé-Weinmann , Christophe Ruzyla , Sébastien Roth , Pascal Hamery","doi":"10.1016/j.finel.2025.104313","DOIUrl":"10.1016/j.finel.2025.104313","url":null,"abstract":"<div><div>Nonlinear filter earplugs are hearing protection devices that protect against high-level impulse noises while allowing communication and situational awareness. Unlike conventional passive protectors, these devices provide increasing attenuation with the impulse sound pressure level thanks to filters made of one or more small orifices. Their performances are usually assessed with experimental measurements requiring specific high-cost equipment. This study aims to develop a numerical model based on the time-domain finite element method to provide an alternative approach to evaluate these protectors’ performance. Thus, the modeled acoustic pressures in an acoustic test fixture’s ear canal occluded with a simplified nonlinear filter earplug were estimated. The simulations were performed using high-level impulse noises ranging from 116 to 171 dB-peak. The effects of equilibrium temperature and model limitations were also analyzed. The in-ear sound pressure levels and corresponding protector’s attenuation calculated with the numerical model were compared to previous experimental measurements, and good correspondence was found. Regarding the in-ear peak sound level, deviations comprised between 0.5 dB and 1.3 dB were computed. A change in equilibrium temperature did not induce significant variation in peak sound pressure levels. This study and its underlying observations pave the way for optimizing nonlinear filter characteristics and their integration into new hearing protection devices at lower costs.</div></div>","PeriodicalId":56133,"journal":{"name":"Finite Elements in Analysis and Design","volume":"245 ","pages":"Article 104313"},"PeriodicalIF":3.5,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143055383","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

Improving the computation of forced responses of periodic structures by the wave-based finite element method via a modified generalized Bloch mode synthesis

IF 3.5 3区工程技术

Finite Elements in Analysis and Design Pub Date : 2025-01-29 DOI: 10.1016/j.finel.2025.104314

Vinícius M. de S. Santos , Thiago de P. Sales , Morvan Ouisse

{"title":"Improving the computation of forced responses of periodic structures by the wave-based finite element method via a modified generalized Bloch mode synthesis","authors":"Vinícius M. de S. Santos , Thiago de P. Sales , Morvan Ouisse","doi":"10.1016/j.finel.2025.104314","DOIUrl":"10.1016/j.finel.2025.104314","url":null,"abstract":"<div><div>Periodic structures have attracted interest across various fields of science and engineering due to their unique ability to manipulate wave propagation. The Wave-based Finite Element Method (WFEM) is typically employed to model such systems by relying on the dynamic behavior of a single unit cell of the lattice. However, the WFEM can face challenges in handling unit cell finite element (FE) models with several degrees of freedom (DoFs), as it involves operating with large-sized matrices. Therefore, in this work, we combine the WFEM with the Generalized Bloch-Mode Synthesis (GBMS) to offer a highly efficient and accurate method for modeling periodic structures. Three different types of unit cells were investigated in this study, demonstrating that highly reduced unit cell models can be obtained using the Craig-Bampton (CB) and Local-level Characteristic Constraint (L-CC) model reduction methods. By leveraging the advantages of the WFEM and the reduced-order unit cell models, harmonic forced responses were rapidly and accurately computed. Additionally, we showed that combining the WFEM with the GBMS mitigates numerical issues when computing forced responses, as the boundary DoFs are reduced to a smaller number of equations, avoiding the computation of high-order evanescent modes, a task that can be difficult to perform accurately for some unit cells.</div></div>","PeriodicalId":56133,"journal":{"name":"Finite Elements in Analysis and Design","volume":"245 ","pages":"Article 104314"},"PeriodicalIF":3.5,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143055325","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

Chebyshev polynomials in moving Kriging meshfree method for laminated composite plates 复合材料层合板移动Kriging无网格法中的切比雪夫多项式

IF 3.5 3区工程技术

Finite Elements in Analysis and Design Pub Date : 2025-01-19 DOI: 10.1016/j.finel.2025.104312

Lieu B. Nguyen , P. Phung-Van , Chien H. Thai

{"title":"Chebyshev polynomials in moving Kriging meshfree method for laminated composite plates","authors":"Lieu B. Nguyen , P. Phung-Van , Chien H. Thai","doi":"10.1016/j.finel.2025.104312","DOIUrl":"10.1016/j.finel.2025.104312","url":null,"abstract":"<div><div>We propose a new shape function for a meshfree method by combining of moving Kriging (MK) and Chebyshev interpolations, referred to Chebyshev moving Kriging (CMK) interpolations. This approach improves the accuracy of the numerical solutions by using Chebyshev polynomials in place of traditional polynomials. Additionally, Chebyshev polynomials are utilized to represent a higher-order shear deformation theory (HSDT), called the Chebyshev shear deformation theory (CSDT). A key advantage of the CSDT is its ability to automatically satisfy the condition of zero shear stress at both the top and bottom of the plate. This study introduces an integration of the CMK meshfree method and the CSDT to investigate the static and free vibration characteristics of laminated composite plates. Furthermore, the virtual work principle is exploited to derive the weak forms of the governing equations for laminated composite plates. The CMK meshfree method is then used to compute the displacements and natural frequencies. Numerical simulations are conducted to assess the impacts of geometric parameters, boundary conditions, length-to-thickness ratios, and fibre orientation angles on the displacements and natural frequencies of laminated composite plates. The accuracy of the numerical solutions is assessed by comparing them with the results from 3D elasticity and other shear deformation theories.</div></div>","PeriodicalId":56133,"journal":{"name":"Finite Elements in Analysis and Design","volume":"245 ","pages":"Article 104312"},"PeriodicalIF":3.5,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143020131","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

Dynamic topology optimization incorporating the material anisotropy feature for 3D printed fiber composite structures 结合材料各向异性特征对 3D 打印纤维复合材料结构进行动态拓扑优化

IF 3.5 3区工程技术

Finite Elements in Analysis and Design Pub Date : 2024-11-26 DOI: 10.1016/j.finel.2024.104281

Kaiyuan Meng , Junyu Fu , Dianwei Qu , Lei Li , Jikai Liu

{"title":"Dynamic topology optimization incorporating the material anisotropy feature for 3D printed fiber composite structures","authors":"Kaiyuan Meng , Junyu Fu , Dianwei Qu , Lei Li , Jikai Liu","doi":"10.1016/j.finel.2024.104281","DOIUrl":"10.1016/j.finel.2024.104281","url":null,"abstract":"<div><div>For additive manufacturing of fiber-reinforced composites, integrated structural topology optimization and deposition path planning is critical in capturing the anisotropic material feature for designing dynamic performance-oriented structures. Hence, this paper proposes a concurrent optimization method for simultaneously optimizing the structural topology and the fiber deposition path. The Solid Orthotropic Materials with Penalization (SOMP) is adopted for interpolating the constitutive equation. Double layers of Smoothing and Projection (DSP) are performed to distinguish the contour-offset layer from the zigzag-infilled substrate. For optimization, the dynamic compliance is adopted as the objective function and three types of dynamic forces are involved: the harmonic excitation, the non-harmonic excitation and the frequency band excitation. A wide range of numerical examples are studied to demonstrate the optimization effect. And at the end, two sets of experiments are performed to test the dynamic responses of the topology optimized and 3D printed fiber composite structures. Enhanced dynamic stability through optimization has been proved by both the numerical calculation and physical tests.</div></div>","PeriodicalId":56133,"journal":{"name":"Finite Elements in Analysis and Design","volume":"243 ","pages":"Article 104281"},"PeriodicalIF":3.5,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142718616","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 adaptive mesh refinement algorithm for crack propagation with an enhanced thermal–mechanical local damage model 使用增强型热机械局部损伤模型进行裂纹扩展的自适应网格细化算法

IF 3.5 3区工程技术

Finite Elements in Analysis and Design Pub Date : 2024-11-22 DOI: 10.1016/j.finel.2024.104278

Manh Van Pham , Minh Ngoc Nguyen , Tinh Quoc Bui

{"title":"An adaptive mesh refinement algorithm for crack propagation with an enhanced thermal–mechanical local damage model","authors":"Manh Van Pham , Minh Ngoc Nguyen , Tinh Quoc Bui","doi":"10.1016/j.finel.2024.104278","DOIUrl":"10.1016/j.finel.2024.104278","url":null,"abstract":"<div><div>This paper presents a computationally effective approach for crack propagation under mechanical and thermal loads based on an adaptive mesh refinement (AMR) approach tailored for our recently developed enhanced local damage model. The mesh-dependent issue encountered in the classical local theories is effectively mitigated by incorporation of fracture energy and element characteristic length into the damage evolution function. Our previous research has demonstrated that being equipped by a novel equivalent strain derived from the bi-energy norm concept and a new damage criterion recently proposed by Mazars et al., the model provides results comparable to the reference experimental data as well as other numerical models based on non-local/gradient damage and phase field method. In the framework of computational efficiency using finite elements, we significantly enhance the performance of our enhanced local model by considering adaptive mesh refinement (AMR). The finite element mesh is locally refined in the damaged zone, and the mesh refinement is conducted on-the-fly during the analysis. For that purpose, the damage parameter whose information is stored at integration points is selected as an indicator to mark whether an element should be refined or not after every loading step. For quadrilateral element mesh, a quad-tree technique is utilized, meaning that each marked element is further divided into four smaller quadrilateral elements. The so-called hanging nodes appear during the process, and the elements are thus treated as <span><math><mi>n</mi></math></span>-gons and are constructed by the Laplace shape functions, instead of the usual Lagranges shape functions. To show the accuracy and effectiveness of the proposed scheme, several numerical examples involving homogeneous and heterogeneous materials are studied. In these examples, the damage is induced either by only mechanical loads or by both mechanical and thermal loads.</div></div>","PeriodicalId":56133,"journal":{"name":"Finite Elements in Analysis and Design","volume":"243 ","pages":"Article 104278"},"PeriodicalIF":3.5,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700553","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

Difference in dynamic direct tensile failure mechanism between homogeneous mortar and three-dimensional mesoscopic concrete based on the split Hopkinson tension bar 基于分体式霍普金森拉杆的匀质砂浆与三维中观混凝土动态直接拉伸破坏机理的差异

IF 3.5 3区工程技术

Finite Elements in Analysis and Design Pub Date : 2024-11-15 DOI: 10.1016/j.finel.2024.104277

Jing He , Dianah Mazlan , Badorul Hisham Abu Bakar , Li Chen

{"title":"Difference in dynamic direct tensile failure mechanism between homogeneous mortar and three-dimensional mesoscopic concrete based on the split Hopkinson tension bar","authors":"Jing He , Dianah Mazlan , Badorul Hisham Abu Bakar , Li Chen","doi":"10.1016/j.finel.2024.104277","DOIUrl":"10.1016/j.finel.2024.104277","url":null,"abstract":"<div><div>At the mesoscale, concrete is considered a three-phase composite material comprising stone, mortar, and the interfacial transition zone. Even though mortar is an important component of concrete, its material parameters have not been determined systematically, and they are often modeled by assuming that they are weaker versions of the concrete parameters. Therefore, accurately describing the role of mortar in concrete and the failure mechanism of concrete is difficult. The quasi-static and dynamic direct tensile tests were performed to obtain the stress–strain curves and failure modes of mortar specimens and to establish a formula describing the mortar strain-rate effect. Numerical simulations were then performed using the improved Karagozian and Case concrete models, and the obtained experimental data to clarify the differences in the failure mechanisms of mortar and concrete under dynamic tensile loads. Results showed that concrete had a higher tensile strength but a lower strain-rate effect than mortar. This paper provides an important contribution to study the failure analysis of concrete structures under dynamic loads.</div></div>","PeriodicalId":56133,"journal":{"name":"Finite Elements in Analysis and Design","volume":"242 ","pages":"Article 104277"},"PeriodicalIF":3.5,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655636","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

Fracture process zone modelling of a magnesia spinel refractory using phase field fracture model 利用相场断裂模型建立菱镁尖晶石耐火材料的断裂过程区模型

IF 3.5 3区工程技术

Finite Elements in Analysis and Design Pub Date : 2024-11-15 DOI: 10.1016/j.finel.2024.104279

Zain Ali , Shengli Jin , Dietmar Gruber

引用次数: 0

Concurrent multiscale modelling of woven fabrics: Using beam finite elements with contact at mesoscale 编织物的多尺度并行建模：使用带有中尺度接触的梁有限元

IF 3.5 3区工程技术

Finite Elements in Analysis and Design Pub Date : 2024-11-09 DOI: 10.1016/j.finel.2024.104274

Celso Jaco Faccio Júnior , Vijay Nandurdikar , Alfredo Gay Neto , Ajay B. Harish

{"title":"Concurrent multiscale modelling of woven fabrics: Using beam finite elements with contact at mesoscale","authors":"Celso Jaco Faccio Júnior , Vijay Nandurdikar , Alfredo Gay Neto , Ajay B. Harish","doi":"10.1016/j.finel.2024.104274","DOIUrl":"10.1016/j.finel.2024.104274","url":null,"abstract":"<div><div>The mechanical behaviour of textile materials, fundamental to textile composites, is critical for designing advanced material solutions. Mechanical modelling of textiles is highly complex due to the interactions between yarns, resulting in distinct nonlinear characteristics for different textile patterns. Therefore, engineering methods are essential for analysing loading scenarios and integrating decisions about textile patterns, their alignment, and other factors into the design process. One potential approach is the use of multiscale analysis. We present a novel approach for multiscale modelling in this context. Our approach models the mesoscale using beam elements and enhanced contact models to capture the interactions between yarns, while the macroscale employs solid elements with material non-linearity. This developed approach is verified by comparing pure mesoscale and multiscale results using uniaxial, biaxial, and picture frame tests. Additionally, the applicability of the multiscale method is demonstrated under more complex loading conditions. This proposal aims to model the overall mechanical response of textile patterns under complex loading conditions and can be used as a tool to evaluate the mechanical behaviour of textiles comprehensively.</div></div>","PeriodicalId":56133,"journal":{"name":"Finite Elements in Analysis and Design","volume":"242 ","pages":"Article 104274"},"PeriodicalIF":3.5,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655624","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