Article
Chemistry, Physical
Yousef Navidtehrani, Covadonga Betegon, Emilio Martinez-Paneda
Summary: This study presents a simple and robust implementation of the phase field fracture method in Abaqus, utilizing only the UMAT subroutine and showing potential and robustness in addressing various fracture scenarios. The new implementation is capable of reproducing numerical and experimental results, capturing complex crack trajectories, and solving contact problems efficiently, with the developed code freely available for use.
Article
Mechanics
Jose A. Gonilha, Nuno Silvestre, Joao R. Correia, Volnei Tita, David Martins
Summary: This study introduces a novel damage model for the 3D simulations of pultruded FRP structures, showing the ability to predict experimental behavior accurately.
COMPOSITE STRUCTURES
(2021)
Article
Acoustics
Per Kristian Bolstad, Martijn E. Frijlink, Tung Manh, Lars Hoff
Summary: This study presents a finite element method to estimate the effective medium parameters of 2D and 3D layers of arbitrary composition. The method can capture deviations occurring in coarser composites and demonstrates that void positions influence wave velocity.
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2022)
Article
Materials Science, Multidisciplinary
Soheil Satouri, Rabii Chekkour, George Chatzigeorgiou, Fodil Meraghni, Gilles Robert
Summary: This study aims to identify the behavior of PA66 under different RH conditions using a phenomenological model that accounts for viscoelastic and viscoplastic rheology coupled to ductile damage. Different loading conditions are considered, and the model parameters are determined using an optimization algorithm. The model captures the effect of RH and provides a better understanding of material properties and rate-dependent inelastic mechanisms under humidity exposure.
MECHANICS OF MATERIALS
(2023)
Article
Instruments & Instrumentation
Shuai Cong, Sau-Lon James Hu, Hua-Jun Li
Summary: In this study, a pole-zero finite element model updating method is proposed to determine complex material parameters of piezoceramic plates. By extracting poles and zeros from measured impedance functions and updating the parameters based on sensitivity, the method demonstrates excellent performance in both computer simulations and laboratory experiments.
SMART MATERIALS AND STRUCTURES
(2022)
Article
Engineering, Manufacturing
Mohammad A. Gharaibeh, Juergen Wilde
Summary: This article investigates the thermal fatigue life of sintered silver bonds using finite element analysis (FEA) and various mechanical creep constitutive models. The study shows that the solder behavior is highly influenced by the material parameters and creep modeling. The findings highlight the importance of accurate stress-strain relationship estimations for power electronics and provide valuable insights for predicting and evaluating the fatigue life of sintered silver die attachments.
IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Xiaowei Yue, Jinxiong Zhou
Summary: This paper presents the formulations for the viscoplasticity of metals based on the Chaboche and Delobelle model, and implements them using UMAT in ABAQUS. The viscoplastic behaviors of two typical metals, 316 Stainless Steel and Zircaloy-4, are captured and validated through numerical simulations and comparison with experimental data. The data and codes are made publicly available.
Article
Materials Science, Multidisciplinary
R. Roszak, D. Schob, I Sagradov, K. Kotecki, H. Sparr, Ph Maasch, R. Franke, M. Ziegenhorn
Summary: The study analyzed the temperature dependent material and damage behavior of additively manufactured polyamide 12, concluding that the Chaboche material model and Gurson-Tvergaard-Needleman damage model are suitable for simulating material and damage behavior.
MECHANICS OF MATERIALS
(2021)
Article
Engineering, Environmental
Jianing Wu, Xiaobin Yang, Yimin Song, Qiudi Sun, Yanyu Pei
Summary: This study proposes a new inversion method of non-uniform distribution of rock material parameters combining the digital speckle correlation method and the finite element model updating method, to investigate the characteristics and evolution of non-uniform distribution of rock material parameters during the loading process. The displacement field of the specimen during experimental loading is calculated using DSCM, and the loading process is simulated using FEMU. Non-uniform displacement field is calculated by assigning different material parameters to each element based on Weibull distribution. The objective function is constructed to optimize the difference between experimental and simulated displacement fields using genetic algorithm and particle swarm optimization algorithm to determine the elastic modulus and Poisson's ratio of the specimen. The inversion method is applied to the uniaxial compression experiment of sandstone and the non-uniform distribution of material parameters under different loading states is obtained.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Mathematics, Applied
John D. van Tonder, Martin P. Venter, Gerhard Venter
Summary: This research identifies hyperplanes in the design space that can be used to determine a unique set of material parameters, leading to accurate characterization of the material's mechanical behavior.
FINITE ELEMENTS IN ANALYSIS AND DESIGN
(2023)
Article
Engineering, Electrical & Electronic
Cam Key, Jake J. Harmon, Branislav M. Notaros
Summary: In this study, it was demonstrated that elementwise error contribution estimates remain highly correlated as material parameters change in scattering problems. The correlation between these estimates is shown to be stronger than that for quantities of interest or gradients of such quantities across the same range of dielectric parameters. Additionally, a correlation was found between the mean and standard deviation of elementwise error contribution estimate magnitudes.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Tao Zhou, Lin He, Zhiguo Feng, Pengfei Tian, Feilong Du, Zichuan Zou, Xiaorong Zhou
Summary: This paper proposes a reverse identification method of material constitutive parameters based on co-simulation. It analyzes the influence of factors such as mass scaling factor, mesh size, and Johnson-Cook (J-C) constitutive parameters on cutting force, and carries out orthogonal cutting experiments for difficult-to-machine materials. By combining genetic algorithm, the J-C constitutive parameters are directly optimized based on the minimum error between the finite element simulation value and the experimental value of the cutting force. The results show that the reasonable setting of mass scaling factor and mesh size can significantly improve the optimization efficiency of constitutive parameters.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Nejc Dvorsek, Iztok Stopeinig, Simon Klancnik
Summary: The main objective of this study is to develop a genetic algorithm (GA) for optimizing material model parameters based on 12 experiments. The GA uses a similarity measure algorithm to compare experimental and simulation data and minimize the objective function. The performance of the GA is evaluated with different parameters, and it shows improvement compared to the classic trial and error approach.
Article
Mechanics
Paulo Vicente de Cassia Lima Pimenta, Jose Rene de Sousa Rocha, Francisco Marcondes
Summary: A computational thermomechanical simulator using the Element-based Finite-Volume Method (EbFVM) has been developed to study the solidification process of continuous casting ingots. The simulator considers thermal behavior, plasticity, and viscoplasticity models, and has been validated successfully. A new spraying scheme has been proposed to enhance the cooling stage and prevent cracking during continuous casting.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2022)
Article
Engineering, Multidisciplinary
Shengwen Tu, Naoki Morita, Tsutomu Fukui, Kazuki Shibanuma
Summary: This study aimed to extend the finite element method to cope with elastic-plastic problems by introducing the s-version FEM. The s-version FEM, which overlays a set of local mesh with fine element size on the conventional FE mesh, simplifies domain discretisation and provides accurate numerical predictions. Previous applications of the s-version FEM were limited to elastic problems, lacking instructions for stress update in plasticity. This study presents detailed instructions and formulations for addressing plasticity problems with the s-version FEM and analyzes a stress concentration problem with linear/nonlinear material properties.
APPLIED MATHEMATICAL MODELLING
(2024)
Article
Materials Science, Multidisciplinary
Ewa Ura-Binczyk, Bartosz Moronczyk, Seiji Kuroda, Hiroshi Araki, Jakub Jaroszewicz, Rafal Maksymilian Molak
Article
Engineering, Multidisciplinary
Cyprian Suchocki, Stanislaw Jemiolo
INTERNATIONAL JOURNAL OF COMPUTATIONAL METHODS
(2020)
Article
Engineering, Mechanical
Cyprian Suchocki, Rafal Molak
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2019)
Article
Materials Science, Multidisciplinary
R. Sitek, R. Molak, J. Zdunek, P. Bazarnik, P. Wisniewski, K. Kubiak, J. Mizera
Summary: This study investigates the impact of an aluminizing process on the microstructure and tensile strength of nickel superalloy IN 718 produced through Selective Laser Melting (SLM). The results show that with appropriate technological parameters, the alloy can achieve a fine column microstructure and crystal dendrites. The aluminizing process by chemical vapor deposition method can lead to the formation of an intermetallic layer comprised mainly of AlNi phase with compressive residual stresses.
Article
Engineering, Mechanical
Cyprian Suchocki, Stanislaw Jemiolo
Summary: This work analyzes selected isotropic invariant-based hyperelastic models, identifying material parameters through curve fitting for eight experimental datasets. The Gent model may not always provide acceptable data approximation quality, and conditions proposed by Rivlin and Saunders often lead to best curve fitting results but are contradictory with polyconvexity requirements. The assumption of polyconvexity results in a slight decrease in curve fitting quality, with the power law model usually achieving the best approximation when energy polyconvexity is assumed. Among non-polyconvex models, the generalized Gent model frequently achieves the best curve fitting results, although both Gent and the generalized Gent models are problematic due to the locking effect.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2021)
Article
Chemistry, Physical
Wojciech Zorawski, Rafal Molak, Janusz Madry, Jaroslaw Sienicki, Anna Goral, Medard Makrenek, Mieczyslaw Scendo, Romuald Dobosz
Summary: In this study, the cold spray process was used to deposit thick titanium coatings onto 7075 aluminium alloy, and it was found that the standoff distance significantly affected the microstructure and adhesion of the coatings. Increasing the standoff distance can improve deposition efficiency and also impact the porosity and hardness of the coatings.
Article
Mechanics
Cyprian Suchocki
Summary: This work discusses the finite element implementation of small strain cyclic plasticity, considering elastoplastic constitutive models and utilizing the radial return mapping algorithm to discretize the constitutive equation. A relation for the consistent elastoplastic tangent operator is derived and a user subroutine is developed to implement the cyclic plasticity model. Several validation tests have been performed to verify the code's performance.
Article
Engineering, Civil
Cyprian Suchocki, Zbigniew Kowalewski
Summary: In this study, a new method for determining the material parameters of cyclic plasticity is proposed. The method can be applied to evaluate the model parameters from any experimentally measured loading histories with basic data processing. The results show that the Chaboche-Rousselier (Ch-R) model with two Voce terms for isotropic hardening and two backstress variables for kinematic hardening provides a very good description of the mechanical properties of copper.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Piotr Dlugosz, Wlodzimierz Bochniak, Pawel Ostachowski, Rafal Molak, Martin Duarte Guigou, Marek Hebda
Summary: Designers increasingly prefer lightweight magnesium alloys with excellent mechanical properties. Research shows that better strength properties can be achieved through plastic working processes without significant loss of plastic properties. The low-temperature KOBO method has advantages over conventional high-temperature deformation.
Article
Chemistry, Physical
Rafal Maksymilian Molak, Bartosz Moronczyk, Ewa Ura-Binczyk, Zbigniew Pakiela, Wojciech Zorawski, Krzysztof Jan Kurzydlowski, Seiji Kuroda
Summary: Aluminium (Al) and titanium (Ti) coatings were applied on AZ91E magnesium alloy using a low-pressure warm spray method with different nitrogen flow rates (NFR). The effects of NFR on coating microstructure and physical properties were systematically studied. The results showed that decreasing NFR resulted in denser and more compact coatings, but also increased powder oxidation. Al coatings exhibited lower hardness and wear resistance compared to Ti coatings, but were more suitable for corrosion protection due to their low porosity and high compactness.
Article
Mechanics
Cyprian Suchocki
Summary: This study discusses the potential of hyperelastic modeling for metallic materials, analyzing the performance of a four-parameter model and another elastic energy function. A general-purpose user subroutine is developed to implement hyperelastic models, and their accuracy in describing the mechanical response of metals is verified using experimental data. The study also highlights the superior convergence of hyperelastic models in finite element analysis.
Article
Nanoscience & Nanotechnology
E. Ura-Binczyk, A. Dobkowska, P. Bazarnik, J. Ciftci, A. Krawczynska, W. Chrominski, T. Wejrzanowski, R. Molak, R. Sitek, T. Plocinski, J. Jaroszewicz, J. Mizera
Summary: Annealing treatment has an impact on the mechanical properties and corrosion susceptibility of 316L stainless steel. It results in an increase in grain size, proportion of low-angle grain boundaries, and changes in the chemical composition and density of nano-inclusions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Izabela Zglobicka, Magdalena Joka-Yildiz, Rafal Molak, Michal Kawalec, Adrian Dubicki, Jakub Wroblewski, Kamil Dydek, Anna Boczkowska, Krzysztof J. Kurzydlowski
Summary: In this study, biodegradable composites were prepared by reinforcing commercial PLA with diatomaceous earth. The structure and properties of the composites were investigated using scanning electron microscopy and differential scanning calorimetry.
Article
Mechanics
Cyprian Suchocki
Summary: This paper considers a specific type of elasto-viscoplastic constitutive equations. The viscoplastic model proposed by Marquis is generalized to allow for multiple hardening terms. The presented model formulation also allows the use of arbitrary equivalent plastic strain functions. The modified backstress evolution equation is introduced to include any equivalent plastic strain function in the recovery term, and the derived general form of the constitutive model is implemented into the finite element method.
