Latin American Journal of Solids and Structures最新文献

Coupling Modal Analysis with the BEM for the Transient Response of Bar Structures Interacting with Three-Dimensional Soil Profiles 三维土体剖面作用下杆结构瞬态响应的边界元耦合模态分析

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2023-08-28 DOI: 10.1590/1679-78257571

Amauri Coelho Ferraz, Lucas Agatti Pacheco, R. Carrion, E. Mesquita

{"title":"Coupling Modal Analysis with the BEM for the Transient Response of Bar Structures Interacting with Three-Dimensional Soil Profiles","authors":"Amauri Coelho Ferraz, Lucas Agatti Pacheco, R. Carrion, E. Mesquita","doi":"10.1590/1679-78257571","DOIUrl":"https://doi.org/10.1590/1679-78257571","url":null,"abstract":"This work investigates the transient response of bar structures interacting with three-dimensional soil profiles. The structures are modeled by the Finite Element Method (FEM) and the soil models are described by a three-dimensional Boundary Element Formulation (BEM) in the frequency domain. A classic modal analysis is performed on the structure in terms of the relative displacements with respect to the soil. The dynamic response of the structure is coupled to the soil response, aiming to obtain frequency response functions (FRFs) of the soil-structure system. A new set of modal parameters are extracted from the FRFs of the coupled system. These new parameters allow for the synthesis of a set of orthogonal differential equations in the time domain. These equations are integrated by a classical numerical scheme resulting in the transient response of the structure interacting with the supporting soil. It is shown that for soil profiles that present eigenfrequencies, the system modal basis must be expanded to properly include the soil dynamics. The cases of a structure interacting with a homogeneous half-space and with a horizontal layer over a rigid stratum are considered. The results presented for both soil models are consistent.","PeriodicalId":18192,"journal":{"name":"Latin American Journal of Solids and Structures","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67624363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Sequential method of topological optimization in multi-component systems 多部件系统拓扑优化的顺序方法

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2023-08-28 DOI: 10.1590/1679-78257576

R. Ferro, R. Pavanello

引用次数: 0

Reliability-based design of reinforced concrete pipes to satisfy the TEBT 基于可靠性的钢筋混凝土管道设计以满足TEBT要求

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2023-08-28 DOI: 10.1590/1679-78257510

A. Sousa, L. Prado, M. E. El Debs

引用次数: 0

Innovative Approach for Enhancing GLULAM Performance with Reinforcing Steel Bars: A BESO-based Study 用钢筋增强胶合木性能的创新方法:一项基于bess的研究

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2023-08-28 DOI: 10.1590/1679-78257558

Artur Fernando de Vito Junior, W. Vicente

引用次数: 1

Experimental and Numerical Study on Ballistic Impact Response of Vehicle Tires 汽车轮胎弹道冲击响应的实验与数值研究

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2023-08-21 DOI: 10.1590/1679-78257764

Yangziyi Ji, Xiangdong Li, Lanwei Zhou, Xingfeng Liu

引用次数: 0

Failure response of expanded metal meshes subject to transversal impact 横向冲击下膨胀金属网的失效响应

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2023-08-04 DOI: 10.1590/1679-78257585

G. Martínez, Euro Casanova, C. Graciano

引用次数: 0

Optimization of plates reinforced with different initial slope and variable number of carbon fibers 不同初始斜率和变碳纤维数加筋板的优化设计

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2023-08-04 DOI: 10.1590/1679-78257584

E. Vieira, D. M. Leon, R. Marczak

{"title":"Optimization of plates reinforced with different initial slope and variable number of carbon fibers","authors":"E. Vieira, D. M. Leon, R. Marczak","doi":"10.1590/1679-78257584","DOIUrl":"https://doi.org/10.1590/1679-78257584","url":null,"abstract":"Optimization methods for curvilinear reinforcements placement aims to improve mechanical response of structure. Whenever a gradient-based method is used to optimization, it is necessary arbitrate an initial placement for the fibers. This initial guess has influence on the result. This work aims to observe the influence of the initial positioning of straight carbon fiber in epoxy resin plates, which had their compliance minimized by Sequential Linear Programming. The maximum displacement is observed too, even if it is not an objective function. The case studies were carried out on the same structure and the number of fibers and its slope were changed. Variation of the force slope was also evaluated. The results confirmed an influence of the initial slope in results. The addition of a greater number of fibers does not always cause a better performance in the design. To achieve the best results, it is essential that the initial arrangement be configured in such a way as to provide proximity of the ends of the fibers and the forces and supports. It's important to try to place the fibers with axial directions close to the axial direction of the force.","PeriodicalId":18192,"journal":{"name":"Latin American Journal of Solids and Structures","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67624493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Numerical investigations in non-watertight models based on a surface-independent discretization boundary element method 基于非表面独立离散边界元法的非水密模型数值研究

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2023-08-04 DOI: 10.1590/1679-78257573

S. Cordeiro, Guilherme Henrique Teixeira, G. D. O. Daumas, F. Monteiro

{"title":"Numerical investigations in non-watertight models based on a surface-independent discretization boundary element method","authors":"S. Cordeiro, Guilherme Henrique Teixeira, G. D. O. Daumas, F. Monteiro","doi":"10.1590/1679-78257573","DOIUrl":"https://doi.org/10.1590/1679-78257573","url":null,"abstract":"It is well known that boundary integral equations are exact mathematical representations of the governing differential equations of a boundary value problem when the integrals are written over a closed-shape boundary representation (B-representation) of the domain, usually reffered to as a watertight B-representation. However, practical geometric design technics (namely, NURBS surfaces) often do not render a watertight B-representation. Non-watertight geometric models with small gaps and overlaps are often generated in the design stage of projects. Based on a proposed surface-independent discretization approach, the present study investigates how unsought gaps affect the response of boundary element models of linear elasticity problems. The developed surface-independent discretization is applied to discretize multiple-patches NURBS B-representation geometries. Linear triangular and quadrilateral elements are adopted to discretize the independent surfaces. Generalized discontinuous elements at the edges of the visible areas of the NURBS parametric spaces are detected by a Level Set function. An offset collocation strategy is adopted for the nodes at the edges of the visible part of the parametric spaces. Thus, singularities and near singularities due to collocation are avoided in the BEM equations. The influence of gaps in the convergence of the L2-norm of boundary displacement error is verified in a 3D example with an available analytical solution. A second example with available numerical solution is analyzed with a non-watertight BEM discretization for qualitative boundary field validation. Finally, a non-watertight B-representation geometry of a crane hook is analyzed. The obtained results have pointed out that, as long as the gaps (and overlaps) are small enough, BEM models built up from non-watertight geometries may produce valuable solutions for practical purposes","PeriodicalId":18192,"journal":{"name":"Latin American Journal of Solids and Structures","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67624603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Experimental Study on The Effect of Fracture Strain on the Fragmentation Effect of PELE 断裂应变对PELE破片效果影响的实验研究

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2023-08-04 DOI: 10.1590/1679-78257496

Yuheng Liu, Lizhi Xu, Heling Zheng, Meng Xu, Wenzhe Lv, Z. Du

引用次数: 0

Efficient Crack Length Measurement Using A* Shortest Path Methodology for a Phase-Field Fracture Framework 基于A*最短路径方法的相场断裂框架有效裂纹长度测量

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2023-07-17 DOI: 10.1590/1679-78257559

Matheus Garcia do Vale, Julián Arnaldo Ávila Díaz, J. L. Boldrini, M. Bittencourt

{"title":"Efficient Crack Length Measurement Using A* Shortest Path Methodology for a Phase-Field Fracture Framework","authors":"Matheus Garcia do Vale, Julián Arnaldo Ávila Díaz, J. L. Boldrini, M. Bittencourt","doi":"10.1590/1679-78257559","DOIUrl":"https://doi.org/10.1590/1679-78257559","url":null,"abstract":"Accurately measuring a crack length is a crucial aspect of experimental fracture tests. In this work, we present an innovative application of the A* (A-star) shortest path methodology to track different shapes of cracks from numerical simulations. This approach is highly efficient, significantly improving the speed and accuracy of crack length measurements. Furthermore, we introduce a modified weight cost function that follows the crack path in the damage field, enhancing the accuracy of our method. The effectiveness of the proposed procedure is shown by fabricating damage fields with different geometry and good agreement when compared to the exact values. In addition, we evaluate a time-dependent crack propagation case, achieving high accuracy. We present all features and steps of the procedure to showcase its efficacy in accurately measuring the length of a crack path. Finally, we validate our method using a phase-field fracture framework and compare it with the compliance technique. The results show that the proposed method is applicable in finite element analyses with recovering accurate results.","PeriodicalId":18192,"journal":{"name":"Latin American Journal of Solids and Structures","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67624291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1