Computational Mechanics最新文献

Model and mesh selection from a mCRE functional in the context of parameter identification with full-field measurements. 模型和网格选择从mCRE函数的背景下参数识别与全场测量。

IF 3.7 2区工程技术

Computational Mechanics Pub Date : 2025-01-01 Epub Date: 2025-01-25 DOI: 10.1007/s00466-025-02598-1

Hai Nam Nguyen, Ludovic Chamoin

{"title":"Model and mesh selection from a mCRE functional in the context of parameter identification with full-field measurements.","authors":"Hai Nam Nguyen, Ludovic Chamoin","doi":"10.1007/s00466-025-02598-1","DOIUrl":"10.1007/s00466-025-02598-1","url":null,"abstract":"In this paper, we propose a general deterministic framework to question the relevance, assess the quality, and ultimately choose the features (in terms of model class and discretization mesh) of the employed computational mechanics model when performing parameter identification. The goal is to exploit both modeling and data at best, with optimized model accuracy and computational cost governed by the richness of available experimental information. Using the modified Constitutive Relation Error concept based on reliability of information and the construction of optimal admissible fields, we define rigorous quantitative error indicators that point out individual sources of error contained in the identified computational model with regards to (noisy) observations. An associated adaptive strategy is then proposed to automatically select, among a hierarchical list with increasing complexity, some parameterized mathematical model and finite element mesh which are consistent with the content of experimental data. In addition, the approach is computationally enhanced by the complementary use of model reduction techniques and specific nonlinear solvers. We focus here on experimental information given by full-field kinematic measurements, e.g. obtained by means of digital image correlation techniques, even though the proposed strategy would also apply to sparser data. The performance of the approach is analyzed and validated on several numerical experiments dealing with anisotropic linear elasticity or nonlinear elastoplastic models, and using synthetic or real observations.","PeriodicalId":55248,"journal":{"name":"Computational Mechanics","volume":"76 1","pages":"251-277"},"PeriodicalIF":3.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12241245/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144627725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

A theoretical analysis of mass scaling techniques. 质量标度技术的理论分析。

IF 3.8 2区工程技术

Computational Mechanics Pub Date : 2025-01-01 Epub Date: 2025-03-07 DOI: 10.1007/s00466-025-02611-7

Yannis Voet, Espen Sande, Annalisa Buffa

引用次数: 0

A comparison of formulations and non-linear solvers for computational modelling of semiconductor devices. 半导体器件计算模型的公式和非线性解算器的比较。

IF 3.7 2区工程技术

Computational Mechanics Pub Date : 2025-01-01 Epub Date: 2024-11-23 DOI: 10.1007/s00466-024-02578-x

Sergi Pérez-Escudero, David Codony, Irene Arias, Sonia Fernández-Méndez

引用次数: 0

Level set-based XFEM modelling of the multi-scale hygro-mechanical behaviour of oak wood using morphological input from μ CT. 基于水平集的基于μ CT形态输入的橡木多尺度水力学行为XFEM模型。

IF 3.8 2区工程技术

Computational Mechanics Pub Date : 2025-01-01 Epub Date: 2025-03-29 DOI: 10.1007/s00466-025-02618-0

M A Livani, A S J Suiker, M P F H L van Maris, E Bosco

{"title":"<ArticleTitle xmlns:ns0=\"http://www.w3.org/1998/Math/MathML\">Level set-based XFEM modelling of the multi-scale hygro-mechanical behaviour of oak wood using morphological input from <ns0:math><ns0:mi>μ</ns0:mi></ns0:math> CT.","authors":"M A Livani, A S J Suiker, M P F H L van Maris, E Bosco","doi":"10.1007/s00466-025-02618-0","DOIUrl":"10.1007/s00466-025-02618-0","url":null,"abstract":"A computational multi-scale model is presented to predict the macroscopic hygro-mechanical behaviour of oak wood, based on detailed three-dimensional mesoscopic representations of entire oak growth rings obtained by X-ray micro-computed tomography ( <math><mi>μ</mi></math> CT). The 3D meso-structural volumes acquired by <math><mi>μ</mi></math> CT scanning consist of arrays of voxels, with the grayscale intensity values of the voxels denoting the local material densities. A level set-based image segmentation method is applied to distinguish the individual meso-structural phases, including the cell walls and voids (lumen and vessels). A dedicated algorithm based on the spatial gradient of the level set function accurately identifies the local material directions in the cell walls. The individual phases in the meso-scale cellular structure are discretized using the extended finite element method. Here, a moment fitting scheme is applied for an efficient numerical integration in the elements intersected by cell wall boundaries. Finally, asymptotic homogenization is used for computing the effective macro-scale response of oak wood from the hygro-mechanical response of the underlying meso-structure. The macro-scale hygro-mechanical behaviour calculated by the multi-scale model for oak growth rings agrees well with experimental values from the literature. Further, the meso-scale response computed for oak growth rings subjected to a representative moisture content variation allows to identify local, critical sites in which mesoscopic hygro-mechanical damage may occur. The effective hygro-mechanical properties calculated by the multi-scale model may serve as an input for predicting the moisture-dependent mechanical response of oak wood structures and objects subjected to arbitrary hygro-mechanical loading paths.","PeriodicalId":55248,"journal":{"name":"Computational Mechanics","volume":"76 3","pages":"635-658"},"PeriodicalIF":3.8,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12457504/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145151784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

An improved thermomechanical model for the prediction of stress and strain evolution in proximity to the melt pool in powder bed fusion additive manufacturing 用于预测粉末床熔融快速成型制造过程中熔池附近应力和应变演变的改进型热力学模型

IF 4.1 2区工程技术

Computational Mechanics Pub Date : 2024-09-19 DOI: 10.1007/s00466-024-02545-6

Pegah Pourabdollah, Farzaneh Farhang-Mehr, Steve Cockcroft, Daan Maijer, Asmita Chakraborty

{"title":"An improved thermomechanical model for the prediction of stress and strain evolution in proximity to the melt pool in powder bed fusion additive manufacturing","authors":"Pegah Pourabdollah, Farzaneh Farhang-Mehr, Steve Cockcroft, Daan Maijer, Asmita Chakraborty","doi":"10.1007/s00466-024-02545-6","DOIUrl":"https://doi.org/10.1007/s00466-024-02545-6","url":null,"abstract":"An improved thermomechanical analysis of the evolution of the stress and plastic strain fields near the melt pool has been developed for the Electron Beam Powder Bed Fusion (PBF-EB) process. The analysis focuses on a sub-domain extracted from a larger component, which includes the sequential addition and melt/consolidation of 4 powder layers on a solid substrate. The material’s behavior was described as a function of temperature and material form (powder, semi-consolidated, bulk, and liquid). The yield stress was described as a function of temperature and strain rate to capture key phenomena related to plastic strain accumulation. The thermal component of the model has been validated using melt pool geometry. The importance of the strain rate-dependent yield stress and substrate temperature were identified. Yielding was predicted to occur in the solid directly below the melt pool in association with rapid heating and, to a lesser extent, during cooling in the wake of the melt pool as it solidifies. A linear regression model was proposed, linking the developed compressive plastic strain to substrate temperature for a single set of beam parameters. The model was validated by comparing the substrate temperatures needed to produce the same plastic strains used to predict the distortion in a component with a ledge-type feature fabricated in a commercial PBF-EB machine. It is proposed that the linear regression model may be used to estimate the strain variation in large components as a function of the varying thermal field in the newly consolidated material (the substrate) during component fabrication.","PeriodicalId":55248,"journal":{"name":"Computational Mechanics","volume":"212 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

A consistent discretization via the finite radon transform for FFT-based computational micromechanics 通过有限氡变换实现一致的离散化，用于基于 FFT 的计算微机械学

IF 4.1 2区工程技术

Computational Mechanics Pub Date : 2024-09-14 DOI: 10.1007/s00466-024-02542-9

Lukas Jabs, Matti Schneider

引用次数: 0

On the use of scaled boundary shape functions in adaptive phase field modeling of brittle fracture 在脆性断裂的自适应相场建模中使用比例边界形状函数

IF 4.1 2区工程技术

Computational Mechanics Pub Date : 2024-09-12 DOI: 10.1007/s00466-024-02529-6

Carolin Birk, Ajay Kumar Pasupuleti, Rama Assaf, Sundararajan Natarajan, Hauke Gravenkamp

引用次数: 0

Efficient and accurate analysis of locally resonant acoustic metamaterial plates using computational homogenization 利用计算均质化对局部共振超材料声学板进行高效准确的分析

IF 4.1 2区工程技术

Computational Mechanics Pub Date : 2024-09-12 DOI: 10.1007/s00466-024-02541-w

T. Lenders, L. Liu, V. G. Kouznetsova

{"title":"Efficient and accurate analysis of locally resonant acoustic metamaterial plates using computational homogenization","authors":"T. Lenders, L. Liu, V. G. Kouznetsova","doi":"10.1007/s00466-024-02541-w","DOIUrl":"https://doi.org/10.1007/s00466-024-02541-w","url":null,"abstract":"This paper introduces a computational homogenization framework for metamaterial plates consisting of locally resonant acoustic metamaterial (LRAM) unit cells. Based on the linearity assumption, the unit cell model is simplified through the superposition of long-wavelength (quasi-static) and local resonant eigenmode solutions. This method results in closed-form expressions describing the macroscale thin plate (shell) with enriched internal variable fields representing the amplitudes of the local resonant eigenmodes. The homogenized macroscopic shell model is implemented using isogeometric analysis, allowing for a straightforward handling of higher-order continuity requirements. Validation against fully-resolved direct numerical simulations (DNS) is conducted, showcasing the capability of the approach in computing the dispersion spectrum of an infinite LRAM plate, as well as performing frequency and time domain analyses of a finite LRAM plate. Results demonstrate that the homogenized enriched plate model accurately predicts wave attenuation within the frequency band-gaps, vibration modes, and wave propagation outside the band-gaps, achieving significantly reduced computational cost compared to DNS. The developed homogenization framework serves as a valuable computational tool for the analysis and design of LRAM panels of finite sizes and arbitrary shape under non-trivial excitations.","PeriodicalId":55248,"journal":{"name":"Computational Mechanics","volume":"18 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142211423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Modeling cellular self-organization in strain-stiffening hydrogels 应变刚性水凝胶中的细胞自组织建模

IF 4.1 2区工程技术

Computational Mechanics Pub Date : 2024-08-31 DOI: 10.1007/s00466-024-02536-7

A. H. Erhardt, D. Peschka, C. Dazzi, L. Schmeller, A. Petersen, S. Checa, A. Münch, B. Wagner

{"title":"Modeling cellular self-organization in strain-stiffening hydrogels","authors":"A. H. Erhardt, D. Peschka, C. Dazzi, L. Schmeller, A. Petersen, S. Checa, A. Münch, B. Wagner","doi":"10.1007/s00466-024-02536-7","DOIUrl":"https://doi.org/10.1007/s00466-024-02536-7","url":null,"abstract":"We derive a three-dimensional hydrogel model as a two-phase system of a fibre network and liquid solvent, where the nonlinear elastic network accounts for the strain-stiffening properties typically encountered in biological gels. We use this model to formulate free boundary value problems for a hydrogel layer that allows for swelling or contraction. We derive two-dimensional plain-strain and plain-stress approximations for thick and thin layers respectively, that are subject to external loads and serve as a minimal model for scaffolds for cell attachment and growth. For the collective evolution of the cells as they mechanically interact with the hydrogel layer, we couple it to an agent-based model that also accounts for the traction force exerted by each cell on the hydrogel sheet and other cells during migration. We develop a numerical algorithm for the coupled system and present results on the influence of strain-stiffening, layer geometry, external load and solvent in/outflux on the shape of the layers and on the cell patterns. In particular, we discuss alignment of cells and chain formation under varying conditions.","PeriodicalId":55248,"journal":{"name":"Computational Mechanics","volume":"102 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142211419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Deformation twinning as a displacive transformation: computational aspects of the phase-field model coupled with crystal plasticity 作为位移转变的变形孪晶：与晶体塑性耦合的相场模型的计算问题

IF 4.1 2区工程技术

Computational Mechanics Pub Date : 2024-08-23 DOI: 10.1007/s00466-024-02533-w

Przemysław Sadowski, Mohsen Rezaee-Hajidehi, Stanisław Stupkiewicz

引用次数: 0