14th WCCM-ECCOMAS Congress最新文献_第7页

Least-Squares Methods for Linear Elasticity: Refined Error Estimates 线性弹性的最小二乘方法:精确误差估计

14th WCCM-ECCOMAS Congress Pub Date : 1900-01-01 DOI: 10.23967/wccm-eccomas.2020.137

F. Bertrand, H. Schneider

引用次数: 1

Robust and Efficient Large Deformation Analysis of Kirchhoff–love Shells: Locking, Patch Coupling and Iterative Solution Kirchhoff-love壳的鲁棒高效大变形分析:锁定、补片耦合和迭代解

14th WCCM-ECCOMAS Congress Pub Date : 1900-01-01 DOI: 10.23967/WCCM-ECCOMAS.2020.292

D. Magisano, F. Liguori, L. Leonetti, A. Madeo, G. Garcea, J. Kiendl, A. Reali

{"title":"Robust and Efficient Large Deformation Analysis of Kirchhoff–love Shells: Locking, Patch Coupling and Iterative Solution","authors":"D. Magisano, F. Liguori, L. Leonetti, A. Madeo, G. Garcea, J. Kiendl, A. Reali","doi":"10.23967/WCCM-ECCOMAS.2020.292","DOIUrl":"https://doi.org/10.23967/WCCM-ECCOMAS.2020.292","url":null,"abstract":". Isogeometric Kirchhoff-Love elements have received an increasing attention in geometrically nonlinear analysis of thin walled structures. They make it possible to meet the C 1 requirement in the interior of surface patches, to avoid the use of ﬁnite rotations and to reduce the number of unknowns compared to shear ﬂexible models. Locking elimination, patch coupling and iterative solution are crucial points for a robust and efﬁcient nonlinear analysis and represent the main focus of this work. Patch-wise reduced integrations are investigated to deal with locking in large deformation problems discretized via a standard displacement-based formulation. An optimal integration scheme for third order C 2 NURBS, in terms of accuracy and efﬁciency, is identiﬁed, allowing to avoid locking without resorting to a mixed formulation. The Newton method with mixed integration points (MIP) is used for the solution of the discrete nonlinear equations with a great reduction of the iterative burden and a superior robustness with respect to the standard Newton scheme. A simple penalty approach for coupling adjacent patches, applicable to either smooth or non-smooth interfaces, is proposed. An accurate coupling, also for a non-matching discretization, is obtained using an interface-wise reduced integration while the MIP iterative scheme allows for a robust and efﬁcient","PeriodicalId":148883,"journal":{"name":"14th WCCM-ECCOMAS Congress","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129244597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Predictive Modeling of Holdup in Horizontal Wateroil Flow Using a Neural Network Approach 基于神经网络的水平水油流含率预测模型

14th WCCM-ECCOMAS Congress Pub Date : 1900-01-01 DOI: 10.23967/WCCM-ECCOMAS.2020.283

C. Díaz, O. González-Estrada, M. Cely

引用次数: 3

Techniques to Reduce The Computational Cost of Finite Element Models of the Lower Limb Muscles 降低下肢肌肉有限元模型计算成本的技术

14th WCCM-ECCOMAS Congress Pub Date : 1900-01-01 DOI: 10.23967/WCCM-ECCOMAS.2020.332

E. Elyasi, A. Perrier, M. Bailet, Y. Payan

{"title":"Techniques to Reduce The Computational Cost of Finite Element Models of the Lower Limb Muscles","authors":"E. Elyasi, A. Perrier, M. Bailet, Y. Payan","doi":"10.23967/WCCM-ECCOMAS.2020.332","DOIUrl":"https://doi.org/10.23967/WCCM-ECCOMAS.2020.332","url":null,"abstract":"Modeling the lower limb muscles using the Finite Element (FE) method is required for various applications including injury mechanisms or when stress/strain distribution in the muscle is of interest. When the muscles are represented with 3D FE models, the interaction between the muscles can be taken into account that has an effect on their force production. However, the computational cost of such a method is considerably high. Besides, in many cases, a major part of this computational cost is committed to gain unnecessary information. For instance, when having two FE muscles in contact, both muscles need to get finely meshed to conserve their surface details even if having the stress/strain distribution inside one of the two muscles is not required. As a result, the current study aims to explore a model reduction technique based on mesh embedding to decrease the computational cost of such models. A combination of Computerized Tomography and Magnetic Resonance Imaging (MRI) data obtained from a volunteer subject was used to generate a musculoskeletal model of the quadriceps muscle group. The modeling process was performed in ArtiSynth which is an opensource 3D modeling platform supporting combined simulation of multibody and finite element models. This platform allows the attachment of a passive embedded mesh to a FE body so that it deforms in accordance with the motion of the FE body. Considering that the external forces applied to the passive mesh can be propagated back to the FE body attached to it, contact can be defined between the embedded mesh and any other structure. A full and a reduced model are generated and are used to simulate a passive deep knee flexion to test the reliability of the method. The kinematic outcomes are compared against data points obtained from MRI at different flexion angles. The results show that the proposed methodology can be considered as a substitute to fully FE models without a substantial sacrifice on the outcomes despite having lower computational cost.","PeriodicalId":148883,"journal":{"name":"14th WCCM-ECCOMAS Congress","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128997205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulating Compressible and Nearly-Incompressible Linear Elasticity Using an Efficient Parallel Scalable Matrix-Free High-Order Finite Element Method 用一种高效的并行可伸缩无矩阵高阶有限元法模拟可压缩和近不可压缩线弹性

14th WCCM-ECCOMAS Congress Pub Date : 1900-01-01 DOI: 10.23967/WCCM-ECCOMAS.2020.302

A. Mehraban, Jeremy L. Thompson, Jed Brown, R. Regueiro, Valeria, Barra, H. Tufo

引用次数: 0

Approximate Bayesian Computation Applied to Model Selection and Parameter Calibration in Cell Proliferation 近似贝叶斯计算在细胞增殖模型选择和参数标定中的应用

14th WCCM-ECCOMAS Congress Pub Date : 1900-01-01 DOI: 10.23967/WCCM-ECCOMAS.2020.070

N. Silva, B. Loiola, J. Costa, H. Orlande

引用次数: 0