Article
Mechanics
Zhangxi Feng, Miroslav Zecevic, Marko Knezevic, Ricardo A. Lebensohn
Summary: This article presents the use of a single crystal material subroutine to simulate impact experiments on single crystal Ta materials with different crystal orientations. The authors demonstrate the significant role played by crystal orientation-induced anisotropy, strain hardening, and adiabatic heating in the dynamic deformation response of crystalline materials.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Tetsuo Oya, Naoyuki Araki
Summary: This paper presents a novel computational procedure for numerical material testing based on a strain rate-independent crystal plasticity model and an optimization scheme. The proposed method utilizes a crystal plasticity-based finite element model and an optimization scheme based on genetic algorithm to simulate deformation of materials with mechanical anisotropy accurately and reduce the cost and time required for experiments.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
S. Reese, T. Brepols, M. Fassin, L. Poggenpohl, S. Wulfinghoff
Summary: The paper introduces a new anisotropic damage model derived using the structural tensors approach, aimed at modeling materials in the finite strain regime, particularly ductile materials like metals. It also discusses the coupling of this damage model with finite elasto-plasticity and the formulation of evolution equations for plastic deformation, damage tensor, plastic and damage hardening.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
K. E. N'souglo, K. Kowalczyk-Gajewska, M. Marvi-Mashhadi, J. A. Rodriguez-Martinez
Summary: In this paper, the effect of initial texture on multiple necking patterns in ductile metallic rings subjected to rapid radial expansion was investigated using finite element calculations. The material behavior was modeled using the elasto-viscoplastic single crystal constitutive model developed by Marin specialIntscript. The polycrystalline microstructure of the ring was generated using random Voronoi seeds. The results showed that the spatial distribution of grains, grain size, and initial texture have significant effects on the formation of necks.
MECHANICS OF MATERIALS
(2023)
Article
Engineering, Multidisciplinary
Christoph Boehm, Lukas Munk, Blaz Hudobivnik, Fadi Aldakheel, Joze Korelc, Peter Wriggers
Summary: In this paper, the Virtual Element Method (VEM) with a linear ansatz is utilized in a computational crystal plasticity framework in a micro-structural environment. The authors propose a simple anisotropic energetic contribution based on invariant formulations of tensorial deformation measures and structural tensors for the cubic elastic anisotropy of the underlying crystal structure. Additionally, a new stabilization degradation formulation purely based on the dissipative response of the problem is introduced. Representative examples demonstrate the robustness and performance of VEM in addressing locking phenomena and its limitations in heterogeneous microstructures within a crystal plasticity framework.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Crystallography
Giorgio Vago, Tetsuo Oya
Summary: The study aimed to develop a numerical material testing method for hexagonal close-packed (hcp) materials that can predict complex material behavior from simple uniaxial tests. The method used a finite element polycrystal model and a genetic algorithm to determine crystallographic parameters. The applicability of the method was verified through experiments on hcp materials.
Article
Engineering, Mechanical
Wei Jiang, Yinyin Li
Summary: This study investigates the effects of microstructure characteristics on the cumulative plastic slip (CPS) in the dominant slip system (DSS) at meso-scale and the J-integral at macro-scale using the combined crystal plasticity finite element method and variable-node finite element method. Experimental evidence shows that the grain size of the repaired layer is significantly smaller when an appropriate amount of nano tungsten carbide (WC) is added at the crack tip, leading to a greatly reduced J-integral in the repaired specimen. The addition of nano-WC during the laser repairing process serves to strengthen the material and refine the grain of the repaired layer, improving fracture properties.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Engineering, Mechanical
Hyuk Jong Bong, Jinwoo Lee, Myoung-Gyu Lee
Summary: In this study, a multiscale model was developed to predict the cyclic loading behaviors of a wrought magnesium alloy. The model accounted for temperature dependency and introduced the concept of variable residual twin fraction. The accuracy of the model was validated by comparing with experimental data.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Engineering, Mechanical
Seongyong Yoon, Frederic Barlat
Summary: A non-iterative stress update method is proposed to accelerate finite element simulations in plasticity. This method directly integrates the stress tensor based on elastoplastic constitutive law without needing a recursive root-finding process. The method ensures the positivity of the effective plastic strain increment and resolves the uncertainty of yield condition fulfillment through a stress projection technique. It significantly reduces computation time by approximately 50% while maintaining high accuracy in a variety of finite element simulation examples.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Mechanical
Akhil Vijay, Farshid Sadeghi
Summary: This paper presents a two-stage approach for modeling the initiation and propagation phases of rolling element bearing failures. By using crystal plasticity and cohesive elements, the method is able to simulate the initiation and growth of cracks, showing good correlation with experimental data.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Engineering, Mechanical
Umair Bin Asim, Zhiqiang Zhan, Miladin Radovic, Ankit Srivastava
Summary: This article presents a crystal plasticity constitutive relation for the description of non-Schmid crystallographic slip in MAX phases, and verifies the accuracy and reliability of the constitutive relation through finite element simulations.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Mechanics
E. Corona, M. Spletzer, B. T. Lester, C. J. Fietek
Summary: This study conducted numerous experiments and simulations on the puncture of 7075-T651 aluminum alloy plates, and the results show that the material models used in the simulations can accurately predict the puncture speed and failure mode.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Rui Wang, Cheng Lu, Jiaqing Li, Che Zhang, Hailiang Yu, Guillaume Michal
Summary: ASPR treatment can introduce heterogeneous structure in pure copper, significantly improving yield strength while maintaining high ductility. Experimental observations show that surface grains after ASPR treatment have larger misorientations and geometrically necessary dislocations (GNDs) compared to center grains.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Computer Science, Software Engineering
Prince Henry Serrao, Stefan Sandfeld, Aruna Prakash
Summary: Polycrystal microstructures are crucial in determining the effective properties of materials. The OPTIMIC software package allows for the generation of optimized microstructures with extensive user control. By using Voronoi tessellations and customizable cost functions, the software can reflect key features and statistics seen in real microstructures.
Article
Materials Science, Multidisciplinary
Seongyong Yoon, Frederic Barlat
Summary: This paper proposes a fully explicit non-iterative stress projection method for instant stress integration of advanced plasticity models considering history-dependent deformation. The stress increment is directly determined based on the elastoplastic constitutive law in this method. Generalized formulations of the elastoplastic tangent moduli for anisotropic hardening models are discussed, considering morphological changes in the yield surface. The precision integration of stress tensor, effective plastic strain, and other state variables are accomplished for kinematic and distortional hardening models. The implemented plasticity hardening models are validated through non-proportional loadings and sheet metal forming simulations, reducing the computational cost by up to 50%.
MECHANICS OF MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Adnan Eghtesad, Timothy J. Barrett, Marko Knezevic
Review
Materials Science, Multidisciplinary
Marko Knezevic, Irene J. Beyerlein
ADVANCED ENGINEERING MATERIALS
(2018)
Article
Computer Science, Interdisciplinary Applications
Adnan Eghtesad, Kai Germaschewski, Irene J. Beyerlein, Abigail Hunter, Marko Knezevic
ADVANCES IN ENGINEERING SOFTWARE
(2018)
Article
Materials Science, Multidisciplinary
Timothy J. Barrett, Daniel J. Savage, Milan Ardeljan, Marko Knezevic
COMPUTATIONAL MATERIALS SCIENCE
(2018)
Article
Engineering, Mechanical
Isaac Chelladurai, Devin Adams, David T. Fullwood, Michael P. Miles, Stephen Niezgoda, Irene J. Beyerlein, Marko Knezevic
INTERNATIONAL JOURNAL OF PLASTICITY
(2019)
Article
Engineering, Mechanical
Milovan Zecevic, Marko Knezevic
INTERNATIONAL JOURNAL OF PLASTICITY
(2018)
Article
Engineering, Mechanical
Miroslav Zecevic, Ricardo A. Lebensohn, Rodney J. McCabe, Marko Knezevic
INTERNATIONAL JOURNAL OF PLASTICITY
(2018)
Article
Engineering, Mechanical
Saeede Ghorbanpour, Brandon A. McWilliams, Marko Knezevic
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2019)
Article
Engineering, Mechanical
Saeede Ghorbanpour, Md Ershadul Alam, Nicholas C. Ferreri, Anil Kumar, Brandon A. McWilliams, Sven C. Vogel, Jonathan Bicknell, Irene J. Beyerlein, Marko Knezevic
INTERNATIONAL JOURNAL OF PLASTICITY
(2020)
Article
Materials Science, Multidisciplinary
C. M. Poulin, T. J. Barrett, M. Knezevic
EXPERIMENTAL MECHANICS
(2020)
Article
Engineering, Manufacturing
Camille M. Poulin, Sven C. Vogel, Yannis P. Korkolis, Brad L. Kinsey, Marko Knezevic
INTERNATIONAL JOURNAL OF MATERIAL FORMING
(2020)
Article
Materials Science, Multidisciplinary
Nicholas C. Ferreri, Reeju Pokharel, Veronica Livescu, Donald W. Brown, Marko Knezevic, Jun-Sang Park, Michael A. Torrez, George T. Gray
Article
Engineering, Mechanical
Timothy Barrett, Marko Knezevic
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2020)
Article
Materials Science, Multidisciplinary
Iftekhar A. Riyad, William G. Feather, Evgenii Vasilev, Ricardo A. Lebensohn, Brandon A. McWilliams, Adam L. Pilchak, Marko Knezevic
Summary: This paper presents a multi-level crystal plasticity-based simulation framework for modeling mechanical response and microstructure evolution of Ti-6A1-4V with alpha-lath/lamellar microstructures. The model successfully interprets the deformation behavior and texture evolution of the material, demonstrating the capability of predicting plastic anisotropy/asymmetry and the concomitant texture evolution.
Article
Materials Science, Multidisciplinary
Russell E. Marki, Kyle A. Brindley, Rodney J. McCabe, Marko Knezevic
Summary: This paper presents a mathematical procedure for invertible microstructure-property linkages for orthorhombic polycrystalline metals using the generalized spherical harmonics (GSH) spectral basis. The procedure allows for the computation of property closures and enables the simulation of microstructurally heterogeneous components under thermo-mechanical loadings in a computationally efficient manner. The developed framework has been demonstrated using alpha-uranium as a case study.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Engineering, Multidisciplinary
Akshay J. Thomas, Mateusz Jaszczuk, Eduardo Barocio, Gourab Ghosh, Ilias Bilionis, R. Byron Pipes
Summary: We propose a physics-guided transfer learning approach to predict the thermal conductivity of additively manufactured short-fiber reinforced polymers using micro-structural characteristics obtained from tensile tests. A Bayesian framework is developed to transfer the thermal conductivity properties across different extrusion deposition additive manufacturing systems. The experimental results demonstrate the effectiveness and reliability of our method in accounting for epistemic and aleatory uncertainties.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Zhen Zhang, Zongren Zou, Ellen Kuhl, George Em Karniadakis
Summary: In this study, deep learning and artificial intelligence were used to discover a mathematical model for the progression of Alzheimer's disease. By analyzing longitudinal tau positron emission tomography data, a reaction-diffusion type partial differential equation for tau protein misfolding and spreading was discovered. The results showed different misfolding models for Alzheimer's and healthy control groups, indicating faster misfolding in Alzheimer's group. The study provides a foundation for early diagnosis and treatment of Alzheimer's disease and other misfolding-protein based neurodegenerative disorders using image-based technologies.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Jonghyuk Baek, Jiun-Shyan Chen
Summary: This paper introduces an improved neural network-enhanced reproducing kernel particle method for modeling the localization of brittle fractures. By adding a neural network approximation to the background reproducing kernel approximation, the method allows for the automatic location and insertion of discontinuities in the function space, enhancing the modeling effectiveness. The proposed method uses an energy-based loss function for optimization and regularizes the approximation results through constraints on the spatial gradient of the parametric coordinates, ensuring convergence.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Bodhinanda Chandra, Ryota Hashimoto, Shinnosuke Matsumi, Ken Kamrin, Kenichi Soga
Summary: This paper proposes new and robust stabilization strategies for accurately modeling incompressible fluid flow problems in the material point method (MPM). The proposed approach adopts a monolithic displacement-pressure formulation and integrates two stabilization strategies to ensure stability. The effectiveness of the proposed method is validated through benchmark cases and real-world scenarios involving violent free-surface fluid motion.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Chao Peng, Alessandro Tasora, Dario Fusai, Dario Mangoni
Summary: This article discusses the importance of the tangent stiffness matrix of constraints in multibody systems and provides a general formulation based on quaternion parametrization. The article also presents the analytical expression of the tangent stiffness matrix derived through linearization. Examples demonstrate the positive effect of this additional stiffness term on static and eigenvalue analyses.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Thibaut Vadcard, Fabrice Thouverez, Alain Batailly
Summary: This contribution presents a methodology for detecting isolated branches of periodic solutions to nonlinear mechanical equations. The method combines harmonic balance method-based solving procedure with the Melnikov energy principle. It is able to predict the location of isolated branches of solutions near families of autonomous periodic solutions. The relevance and accuracy of this methodology are demonstrated through academic and industrial applications.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Weisheng Zhang, Yue Wang, Sung-Kie Youn, Xu Guo
Summary: This study proposes a sketch-guided topology optimization approach based on machine learning, which incorporates computer sketches as constraint functions to improve the efficiency of computer-aided structural design models and meet the design intention and requirements of designers.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Leilei Chen, Zhongwang Wang, Haojie Lian, Yujing Ma, Zhuxuan Meng, Pei Li, Chensen Ding, Stephane P. A. Bordas
Summary: This paper presents a model order reduction method for electromagnetic boundary element analysis and extends it to computer-aided design integrated shape optimization of multi-frequency electromagnetic scattering problems. The proposed method utilizes a series expansion technique and the second-order Arnoldi procedure to reduce the order of original systems. It also employs the isogeometric boundary element method to ensure geometric exactness and avoid re-meshing during shape optimization. The Grey Wolf Optimization-Artificial Neural Network is used as a surrogate model for shape optimization, with radar cross section as the objective function.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
C. Pilloton, P. N. Sun, X. Zhang, A. Colagrossi
Summary: This paper investigates the smoothed particle hydrodynamics (SPH) simulations of violent sloshing flows and discusses the impact of volume conservation errors on the simulation results. Different techniques are used to directly measure the particles' volumes and stabilization terms are introduced to control the errors. Experimental comparisons demonstrate the effectiveness of the numerical techniques.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Ye Lu, Weidong Zhu
Summary: This work presents a novel global digital image correlation (DIC) method based on a convolution finite element (C-FE) approximation. The C-FE based DIC provides highly smooth and accurate displacement and strain results with the same element size as the usual finite element (FE) based DIC. The proposed method's formulation and implementation, as well as the controlling parameters, have been discussed in detail. The C-FE method outperformed the FE method in all tested examples, demonstrating its potential for highly smooth, accurate, and robust DIC analysis.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Mojtaba Ghasemi, Mohsen Zare, Amir Zahedi, Pavel Trojovsky, Laith Abualigah, Eva Trojovska
Summary: This paper introduces Lung performance-based optimization (LPO), a novel algorithm that draws inspiration from the efficient oxygen exchange in the lungs. Through experiments and comparisons with contemporary algorithms, LPO demonstrates its effectiveness in solving complex optimization problems and shows potential for a wide range of applications.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Jingyu Hu, Yang Liu, Huixin Huang, Shutian Liu
Summary: In this study, a new topology optimization method is proposed for structures with embedded components, considering the tension/compression asymmetric interface stress constraint. The method optimizes the topology of the host structure and the layout of embedded components simultaneously, and a new interpolation model is developed to determine interface layers between the host structure and embedded components.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Qiang Liu, Wei Zhu, Xiyu Jia, Feng Ma, Jun Wen, Yixiong Wu, Kuangqi Chen, Zhenhai Zhang, Shuang Wang
Summary: In this study, a multiscale and nonlinear turbulence characteristic extraction model using a graph neural network was designed. This model can directly compute turbulence data without resorting to simplified formulas. Experimental results demonstrate that the model has high computational performance in turbulence calculation.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Jacinto Ulloa, Geert Degrande, Jose E. Andrade, Stijn Francois
Summary: This paper presents a multi-temporal formulation for simulating elastoplastic solids under cyclic loading. The proper generalized decomposition (PGD) is leveraged to decompose the displacements into multiple time scales, separating the spatial and intra-cyclic dependence from the inter-cyclic variation, thereby reducing computational burden.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Utkarsh Utkarsh, Valentin Churavy, Yingbo Ma, Tim Besard, Prakitr Srisuma, Tim Gymnich, Adam R. Gerlach, Alan Edelman, George Barbastathis, Richard D. Braatz, Christopher Rackauckas
Summary: This article presents a high-performance vendor-agnostic method for massively parallel solving of ordinary and stochastic differential equations on GPUs. The method integrates with a popular differential equation solver library and achieves state-of-the-art performance compared to hand-optimized kernels.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)