Article
Nuclear Science & Technology
Vishnu Ganesh, Daniel Dorow-Gerspach, Christian Linsmeier
Summary: This study proposes a microstructural image based modeling technique to predict the macroscopic mechanical properties of graded tungsten/steel composites. Finite element simulations of the captured microstructures with scanning electron microscopy (SEM) were carried out, and the predicted mechanical properties showed better accuracy compared to traditional linear interpolation.
NUCLEAR MATERIALS AND ENERGY
(2023)
Article
Engineering, Aerospace
Junhao Liang, Xinhai He, Wenlong Tian
Summary: This paper introduces an MT-DI homogenization model with the secant formulation for predicting the Elasto-Plastic Behaviors (EPBs) of aligned inclusions reinforced composites. The model is validated to provide more accurate predictions with 2nd-order secant formulation, while the predictions may vary between those of MT and DI models with the secant formulation. However, the model has limitations in predicting the accurate EPBs for the phases of the composites.
CHINESE JOURNAL OF AERONAUTICS
(2021)
Article
Engineering, Multidisciplinary
Yang Chen, Zhenqiang Zhao, Zaoyang Guo, Yulong Li
Summary: A micromechanics-based constitutive model is proposed for linear viscoelastic particle-reinforced composites with interphase, showing good predictive capability for the viscoelastic behaviors of the composites. Comprehensive numerical simulations and experimental validations demonstrate the effectiveness and accuracy of the proposed model.
APPLIED MATHEMATICAL MODELLING
(2021)
Article
Materials Science, Composites
Yuan Fu, Ping Zheng, Yi Jian Qiu, Jin Liu, You Liang Zhang, Lei Lu, Hui Guo
Summary: In this work, a dual-scale homogenization procedure was used to predict the response of effective elastic properties in chopped fiber reinforced epoxy matrix structures. Two methods, representative volume element (RVE) and unit cell (UC), were introduced and implemented at different scales. The average strain and stress in the UC three-dimensional structure were extracted using a post-processing scheme based on Gauss theorem in the space direction-sensitive Hotelling expansion (SDSHE) model. X-ray computed tomography was used to determine the orientation angle and probability distribution information of chopped fiber length. The proposed models showed excellent correlations with experiments, proving their effectiveness.
POLYMER COMPOSITES
(2022)
Article
Mechanics
Ahmed Elmasry, Wiyao Azoti, Ahmed Elmarakbi
Summary: Light-weighting for energy efficiency without sacrificing safety and performance is a key focus in the automotive industry. This study develops a method to study the application of hierarchical fibres/graphene nanoplatelets-reinforced polymer matrix composites using both one-site and multi-site modelling. The applicability of these models is assessed for automotive crashworthiness under mechanical and rate-dependent plasticity or viscoplasticity behaviors.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Anant S. Bhatnagar, Ankit Gupta, Gaurav Arora, Srikant Padmanabhan, Ramesh G. Burela
Summary: The research aims to replace costly experimental methods with numerical approaches using CNT and BNNT nano-fillers in composite panels. Material properties of panels with varying nano-fillers concentration were determined both computationally and experimentally, followed by finite element analysis to simulate impact tests and compare dynamic responses for different fiber heterogeneities in CNT and BNNT composite plates.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Arkadiusz Denisiewicz, Mieczyslaw Kuczma, Krzysztof Kula, Tomasz Socha
Summary: This study focuses on the computational modeling and laboratory testing of high-performance concrete (HPC) to enhance its properties. Different boundary conditions were used to analyze the influence on HPC properties, and a comparison with experimental data was conducted. The research also considered the damage behavior and microstructure of HPC, using numerical simulations and comparing the results with experimental data to achieve good agreement.
Article
Materials Science, Multidisciplinary
Yang Sun, Yifeng Hu, Mabao Liu
Summary: The study investigates the influence of hard/soft interface effects on the macroscopic elastoplastic behavior of graphene reinforced nanocomposites. Theoretical framework, comparative analyses against experimental data, and detailed parametric analyses are used to expose the effects of major micromechanical variables.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Lucija Stepinac, Josip Galic, Marin Binicki
Summary: This study presents a design methodology for rapid estimation of composite sandwich structures using the TPMS core originally employed in tissue engineering. The stiffness matrix is calculated using RVE homogenization analysis, and the enhancement of bending stiffness through the incorporation of different material layers is analyzed. This design approach provides a time-saving alternative to extensive FEM analysis, particularly for large models.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
H. Ahmadi, M. Hajikazemi, W. Van Paepegem
Summary: In this paper, a computationally efficient multi-scale strategy is proposed to predict the anisotropic elasto-plastic behavior of short fiber reinforced composites (SFRCs) without reverse engineering. Different simple unit cells are examined to find one that can adequately describe the nonlinear mechanical response of SFRCs. The validity and robustness of the proposed strategy are extensively investigated based on RVE-generated results and experimental observations.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Automation & Control Systems
Fei Su, Chunjie Li, Guojun Dong, Lei Zheng, Bing Chen
Summary: This paper established cutting mechanics models and simulation models, deeply studied the cutting mechanism of carbon fiber-reinforced plastic, and revealed the fiber failure modes under different fiber orientations.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Mechanics
Paulo Teixeira Goncalves, Albertino Arteiro, Nuno Rocha, Fermin Otero
Summary: This work presents a novel formulation of a 3D smeared crack model for unidirectional fiber-reinforced polymer composites based on a stress invariant approach for transverse yielding and failure initiation. The performance of the model is evaluated using monotonic and non-monotonic damage evolution, verified with single element tests and compared with experimental results.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Engineering, Civil
Mohit Gupta, Harpreet Singh, Ashraf Nawaz Khan, Puneet Mahajan, R. T. Durai Prabhakaran, R. Alagirusamy
Summary: A novel ply based non-linear material constitutive model is proposed for mechanical characterization of plain woven composite, with the ability to decouple plasticity and progressive damage effects. The study on basalt plain woven composite plays a crucial role in understanding the material properties through mechanical characterization and experiments.
THIN-WALLED STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Subrat Kumar Maharana, Ganesh Soni, Mira Mitra
Summary: An artificial neural network (ANN) model is developed to predict the elasto-plastic response of short fiber-reinforced polymer (SFRP) composites. The ANN model is trained using datasets obtained from Mori-Tanaka mean-field homogenization using Digimat software. The predicted response is compared with experimental results and different homogenization schemes from literature, and the effect of important parameters on the SFRP response is extensively studied using the ANN model.
MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Fedotov Aleksandr
Summary: An experimental-analytical model of nonlinear homogenization of matrix composites is developed based on the Mori-Tanaka secant model. The analytical model is calibrated to the experimental results by fitting the calculated values. The fitting parameter, which is the ratio of constrained equivalent strains of the matrices, is identified using the experimental stress-strain curve for the base composite composition. A linear relationship between the fitting parameter and the volume fraction of particles is used for composites with arbitrary composition. The calculated results agree well with the experimental results.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Mechanics
Subrato Sarkar, I. V. Singh, B. K. Mishra
Summary: The paper introduces a computer implementation of the LGDM in the COMSOL software and highlights the advantages of using COMSOL for this purpose. The intuitive and informative user interface, along with customization options and equation-based modeling feature, make COMSOL a preferred choice for implementing new models and solving complex large-scale problems efficiently.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Materials Science, Multidisciplinary
Neha Duhan, R. U. Patil, B. K. Mishra, I. V. Singh, Y. E. Pak
Summary: In this work, the nonlinear thermo-elastic analysis of edge dislocations with internal heat generation in semiconductor materials is performed using the extended finite element method (XFEM). The study examines the nonlinearity caused by temperature dependent electrical conductivity, thermal conductivity, and thermal expansion coefficient. The presence of an electric field in the direction of the dislocation line leads to internal heat generation due to electrical resistivity. The results show that the Peach-Koehler force values are different depending on the amount of heat generation, and can be used to predict the velocity of the dislocations.
MECHANICS OF MATERIALS
(2022)
Article
Mathematics, Applied
Sandipan Baruah, Subrato Sarkar, I. Singh, B. K. Mishra
Summary: This work presents a computational framework based on finite element analysis, machine learning, and genetic algorithm to accurately estimate and minimize residual stresses in welding. By utilizing an optimization process, the framework can obtain an accurate phase-change model and a set of welding operating conditions that reduce residual stresses.
FINITE ELEMENTS IN ANALYSIS AND DESIGN
(2022)
Article
Engineering, Mechanical
Deepak Sharma, I. V. Singh, Jalaj Kumar
Summary: This work investigates the influence of microstructure on the low cycle fatigue (LCF) life of two-phase titanium alloys. It proposes a new strain-based damage evolution law and statistically analyzes the effect of various microstructural parameters on the LCF life.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Mechanics
J. Jena, I. V. Singh, V. Gaur
Summary: In this paper, an XFEM-based framework is proposed to model the semipermeable crack in magneto-electro-elastic material. The effects of various factors on the normalized magnetic induction intensity factor are studied through numerical simulations.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Mechanics
Alok Negi, I. V. Singh, Imad Barsoum
Summary: This article presents a nonlocal gradient-enhanced damage model that predicts transgranular and intergranular cracks in polycrystalline materials. The model considers the anisotropic linear elastic domains with random spatial orientation and cubic symmetries of the grains. Transgranular micro-cracks are described using a bulk damage variable, while intergranular fracture is incorporated through an interface damage variable and a cohesive law. The proposed computational framework utilizes an operator-split methodology for a robust and straightforward implementation.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Computer Science, Interdisciplinary Applications
Changkye Lee, Indra Vir Singh, Sundararajan Natarajan
Summary: In this paper, the cell-based smoothed finite-element method (CS-FEM) is proposed for solving boundary value problems of gradient elasticity in two and three dimensions. The method eliminates the need for explicit form of the shape functions and iso-parametric mapping. The results show that the proposed framework is accurate and robust.
ENGINEERING WITH COMPUTERS
(2023)
Article
Surgery
Madhubari Vathulya, Subrato Sarkar, Vaishali Verma, Indra Vir Singh, Pankaj Kandwal
Summary: Recurrent ear lobule deformity is a chronic condition that can be addressed through traditional lobuloplasty techniques. This study used finite element analysis to compare the tensile strength of free and attached ear lobules. Results showed that the yield max and corresponding load were lower in the free variety. While this experiment highlights the potential impact of surgical structural changes on the tensile strength of ear lobules, further clinical trials are needed to confirm these findings.
PLASTIC AND RECONSTRUCTIVE SURGERY-GLOBAL OPEN
(2023)
Article
Mechanics
J. Jena, I. V. Singh, V. Gaur
Summary: In this study, the extended finite element method (XFEM) is used to model semipermeable cracks in piezoelectric materials subjected to Maxwell stresses induced by an electric field. The crack tip is enriched with six-fold enrichment functions to accurately represent the semipermeable crack with Maxwell stress. The electro-mechanical interaction integral is modified and implemented for different crack configurations to calculate the stress intensity factor (SIF). The accuracy of the XFEM-based semipermeable crack model is demonstrated through validation with analytical solutions and the effects of various factors on the normalized SIF are investigated.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Engineering, Mechanical
Deepak Sharma, I. V. Singh, Jalaj Kumar
Summary: A computational framework is proposed to predict the microstructure sensitive mechanical behavior of polycrystalline materials, including fatigue crack initiation life and anisotropic deformation behavior. The framework generates 3D microstructural RVEs using Laguerre tessellation technique in Abaqus software. This methodology effectively models the complex geometry of grains and interfaces in 3D polycrystalline microstructures which is otherwise challenging. The predictions of fatigue crack initiation lives and anisotropic deformation behavior have shown good agreement with experimental data.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Multidisciplinary
Shyam Kishor Sharma, Subrato Sarkar, Indra Vir Singh, B. K. Mishra, Rishi K. Sharma
Summary: A numerical framework is developed to estimate the leak-tightness of tube to end-fitting rolled joint under thermal creep. The framework includes a finite element model to determine contact pressure and residual stresses, as well as the effects of thermal creep during the service life. The study examines different leak geometries and finds that an elliptical leak with a major axis in the radial direction increases leakage rate the most.
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2023)
Article
Computer Science, Interdisciplinary Applications
Shivam Saini, Nagaraj Manju Moger, Manish Kumar, Subrato Sarkar, Samarth Mittal, Syed Ifthekar, Kaustubh Ahuja, Indra Vir Singh, Pankaj Kandwal
Summary: Interbody fusions have become popular for achieving good fusion rates, and finite element studies have validated their clinical implications. The study found that interbody procedures significantly reduced the range of motion in extension and torsion, and bilateral screw fixation was biomechanically superior except in torsion.
MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING
(2023)
Article
Engineering, Multidisciplinary
Neha Duhan, B. K. Mishra, I. V. Singh
Summary: In this study, the eXtended finite element method (XFEM) is used to analyze the behavior of edge dislocations near a heterostructure interface with nonuniform misfit strain. A new enrichment method is introduced to account for the singular behavior of the electric potential. Nonlinear material properties due to temperature are considered for a thermo-electro-elastic analysis. The results show the effect of nonuniform misfit strain distribution on the dislocations near the interface and propose a new expression for the Peach-Koehler force considering the combined effect of multiple fields.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Engineering, Mechanical
V. K. Yadav, V. Gaur, I. V. Singh
Summary: The corrosion-fatigue behavior of friction stir welded AA2024-T3 in a 3.5% NaCl solution was investigated. Corrosion-damage analysis revealed that the heat-affected zone in the shoulder-affected region was more susceptible to corrosion attack due to microstructural coarsening. A mechanism was proposed for the microstructural evolution in the shoulder-affected zone. A significant reduction in the fatigue life of the welded component was observed in the 3.5% NaCl solution compared to laboratory air, attributed to pit formation caused by the dissolution of Al-matrix near intermetallic particles.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Civil
Anjali Jha, Neha Duhan, I. V. Singh, B. K. Mishra, Ritu Singh, R. N. Singh
Summary: A numerical model for hydride embrittlement in Zirconium alloy (Zr-2.5Nb) is developed utilizing the extended finite element method (XFEM). The model incorporates all the processes involved in hydride embrittlement and can predict hydrogen concentration and hydride fraction distribution under any externally applied stress field.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
