Article
Materials Science, Multidisciplinary
E. Espinosa, A. Sardar, C. H. M. Simha, A. Bardelcik
Summary: The study presents a framework for digitizing Dual-Phase (DP) steel microstructures into three-dimensional Representative Volume Elements (RVEs), using microscopy images and finite element models. A comprehensive mean-field model is employed to obtain material performance curves, and the relationship between plastic strain and martensite islands at the onset of necking is demonstrated. The iso-work assumption in one-dimensional mean-field models for DP steel as a two-phase composite is also discussed.
MECHANICS OF MATERIALS
(2021)
Article
Metallurgy & Metallurgical Engineering
Mohammad Rezayat, Reyhaneh Rahron, Afagh Allafi
Summary: In this study, a mathematical model is developed to investigate the influence of microstructural parameters on the flow stress and strain-hardening behavior of dual-phase microstructure. The model takes into account the volume fraction and average particle size of martensite, as well as other factors such as martensite carbon content, geometrically necessary dislocations, and strain accommodation at the ferrite-martensite interface. The proposed model shows good predictive capabilities and can identify strain-hardening stages and estimate the inverse of the strain-hardening exponent.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Multidisciplinary Sciences
Keiya Sugiura, Toshio Ogawa, Yoshitaka Adachi
Summary: SliceGAN is a method used to generate 3D microstructure images of ferrite-martensite dual phase steels from one or three 2D images. It accelerates the 3D visualization of microstructure and shows a good agreement with experimentally reconstructed 3D images.
ADVANCED THEORY AND SIMULATIONS
(2022)
Article
Materials Science, Composites
D. Kempesis, L. Iannucci, K. T. Ramesh, S. Del Rosso, P. T. Curtis, D. Pope, P. W. Duke
Summary: This research develops RVE-based finite element models to investigate the influence of microstructure on the overall mechanical behavior of UHMWPE composites. The models consider the randomness of fiber packing sequence and variations in fiber cross-sectional shape, and analyze the effects of interface properties uncertainties on the mechanical response. By calibrating the constituent properties and validating the models with experimental results, the shear and compression responses of UHMWPE laminates are studied.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Huixing Liang, Ziming Wang, Junsong Wu, Xiang Li, D. T. Semirumi
Summary: This study focuses on using PVA and gelatin as biocompatible and biodegradable polymers, along with Arabian gum-HA, to create porous biological tissue with improved mechanical properties. The addition of gum reduced the percentage of porosity, increased tensile strength, and improved the tissue's resistance to destruction.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Nanoscience & Nanotechnology
Shaojing Dong, Minhui Zhou, Kun Gao, Xiuli Shen
Summary: It is widely recognized that the microstructure heterogeneity of welded joints significantly affects their mechanical performance. This study focused on the characterization of microstructure using electron backscatter diffraction and established a statistical distribution model for three-dimensional grain geometric parameters. The accuracy of the modeling method for complex polycrystalline materials was verified through the restoration of statistical characteristics of grains in different areas. The consistency between uniaxial tensile simulation and experiment results demonstrated the value of the model for mechanical analysis.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Metallurgy & Metallurgical Engineering
Diego Fernando Avendano-Rodriguez, Rodolfo Rodriguez-Baracaldo, Sebastian Weber, Lais Mujica-Roncery
Summary: The research focuses on analyzing the damage evolution and microstructural fracture mechanisms of dual-phase steels under quasi-static uniaxial and cyclic tensile tests, considering the influence of martensite volume fraction and distribution. Intercritically annealed samples at different temperatures are used to obtain varying martensite volume fractions. Damage evolution is evaluated based on stiffness loss, revealing lower ductility and strength under cyclic loading conditions. The presence of higher martensite volume fractions results in a faster rate of damage evolution. The primary void nucleation mechanisms observed are ferrite-martensite and ferrite-ferrite decohesion, while martensite fracture is activated based on martensite volume fraction and distribution along the ferrite grain boundary. The high dislocation density on grain boundaries is attributed to the austenite-martensite transformation during quenching and subsequent plastic deformations, and is related to stored strain energy, stress concentration, and fracture mechanisms near martensite grains. Nanoindentation is conducted to evaluate the hardness of ferrite and martensite, which is influenced by their carbon content. The martensite/ferrite hardness ratio is found to affect the uniform elongation of the material.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Multidisciplinary Sciences
Yuechuan Lin, Nichaluk Leartprapun, Justin C. Luo, Steven G. Adie
Summary: Quantitative characterization of micro-scale mechanical properties of the extracellular matrix (ECM) and dynamic cell-ECM interactions can significantly enhance fundamental discoveries and their translational potential in the rapidly growing field of mechanobiology. The authors introduce photonic force optical coherence elastography that uses a light-sheet for parallelised and localised mechanical loading. They demonstrate the combination of 3D imaging of extracellular matrix mechanics with cellular-scale resolution and dynamic monitoring of cell-mediated changes.
NATURE COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
D. Frometa, N. Cuadrado, J. Rehrl, C. Suppan, T. Dieudonne, P. Dietsch, J. Calvo, D. Casellas
Summary: The influence of microstructure on fracture toughness of two industrially processed 1000 MPa dual-phase (DP) steel grades was investigated. Results showed that the strain-induced transformation of retained austenite to martensite may be detrimental to cracking resistance, while the connectivity of hard secondary phases and proportion of soft phase play a major role in fracture toughness. Microstructural tailoring can balance global formability and cracking resistance of high strength DP steels.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Mahdieh Shahmardani, Ruslan Logvinov, Tomas Babinsky, Stefan Guth, Shubhadip Paul, Abhishek Biswas, Napat Vajragupta, Alexander Hartmaier
Summary: This work investigates the cyclic deformation behavior of additively manufactured 316L austenitic stainless steel. Specimens of 316L steel are produced using powder bed fusion of metals with laser beams (PBF-LB/M) with different parameters, and cyclic strain tests are conducted to assess their deformation behavior under cyclic loads at room temperature. Additionally, a micromechanical model based on representative volume elements (RVE) is developed to simulate the deformation-dependent internal stresses within the microstructure. The study reveals significant effects of specimen orientation and crystallographic texture on cyclic behavior, with a minor influence of grain shape.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Energy & Fuels
Wei Liu, Dongyang Han, Gang Wang, Xiangyu Chu
Summary: CT scanning is an essential tool for evaluating coal microstructure, providing non-destructive quantization and visualization. By analyzing the representative elementary volume (REV) of coal samples, a relationship between model sizes and pore structure properties has been established. The comprehensive evaluation of REV improves the rationality and reliability of coal microstructure reconstruction.
Article
Materials Science, Multidisciplinary
Samaneh Isavand, Ahmad Assempour
Summary: This paper utilized finite element simulations and experimental validations to predict the deformation behavior and formability of ferrite-pearlite steels at room temperature, demonstrating that microstructural features play a crucial role in the strain partitioning, strain localization, and formability of ferritic-pearlitic steels.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Mechanics
Ali Cheloee Darabi, Javad Kadkhodapour, Ali Pourkamali Anaraki, Mohammadreza Khoshbin, Amir Alaie, Siegfried Schmauder
Summary: In this paper, the fracture behavior and micro-damage evolution in DP600 and DP980 steels were investigated using experimental and numerical methods. The study found that the damage initiation mechanism in DP steels is dependent on the size of ferrite phases, while damage occurs through void formation, initiation of micro-cracks, and the propagation and coalescence of these micro-cracks. The proposed micromechanical FE model can accurately predict the same damage mechanisms as the in-situ tensile test.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Materials Science, Multidisciplinary
Farzad Badkoobeh, Hossein Mostaan, Mahdi Rafiei, Hamid Reza Bakhsheshi-Rad, Filippo Berto
Summary: This paper reviews the microstructural characteristics and strengthening mechanisms of ferritic-martensitic dual-phase (DP) steels, which are widely used in the automotive industry. The paper discusses the important factors that affect the mechanical properties of DP steels and addresses the improvement techniques and effects of hardening factors. It can provide valuable assistance to researchers and automotive engineers in the manufacturing and design of DP steels with excellent properties.
Article
Nanoscience & Nanotechnology
Alexandre Mathevon, Damien Fabregue, Veronique Massardier, Sophie Cazottes, Philippe Rocabois, Michel Perez
Summary: The Hy-MFC model was developed to predict the tensile properties of dual-phase steels based on microstructure parameters. It can be used for a wide range of steels and allows for alloy design and production-line monitoring. By considering the prior austenitic grain size and martensite composition, the model showed good agreement with experimental data, particularly for steels with various martensite fractions. Additionally, electron backscatter diffraction monitoring during tensile tests helped understand the interactions necessary for macroscopic hardening in dual-phase steels, with a proposed hybrid scaling transition law for small deformations.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Baihong Chen, Changyue Liu, Zengting Xu, Zhijian Wang, Rui Xiao
Summary: In this study, both polydomain and monodomain liquid crystal elastomers (LCEs) were synthesized and their shape change with temperature under a certain stress level was characterized. A thermo-order-mechanical coupling model was developed to predict the shape change of LCEs, showing good consistency with experimental results.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Peng Wang, Fei Xu, Yiding Wang, Jun Song, Cheng Chen
Summary: This study investigates the interplay of super-screw dislocations and coherent twin boundary (CTB) in Ni3Al using molecular dynamics simulations and dislocation continuum theory. Various interaction mechanisms are observed depending on the stress and dislocation gliding pathways. A continuum model framework is developed to evaluate the critical shear stress required for CTB to accommodate dislocations along different pathways, considering the effects of anti-phase boundary (APB) and Complex Stacking Fault (CSF). The study suggests that the resistant force of CTB against all gliding dislocations is a more appropriate metric for quantifying its strength.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Chenyu Du, Haitao Cui, Hongjian Zhang, Zhibin Cai, Weikuo Zhai
Summary: A thermal-elastoplastic phase field model was developed to simulate thermal fatigue crack growth. The accuracy and availability of the model were verified through typical examples. The results indicate that the proposed model effectively simulates the process of thermal fatigue crack propagation in elastoplastic solids. The appropriate regularization length needs to be determined based on experimental results.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
J. Carlsson, A. Kuswoyo, A. Shaikeea, N. A. Fleck
Summary: The sensitivity of the compressive strength of a polymeric Kelvin lattice to the presence of an epoxy core is investigated both experimentally and numerically. The study shows that the epoxy core prevents the formation of crush bands in the lattice and changes its deformation mode. At finite strain, the strength of the lattice is degraded by bending failure and cracking of the struts and adjacent core, leading to the formation of vertical fissures.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Saptarshi Paul, Anurag Gupta
Summary: In this study, we investigate the geometry and mechanics of the buckled orthotropic von Karman elastic plate with free boundary condition, in the presence of an isolated positive or negative disclination. The shape of the buckled plate is cone-like for a positive disclination and saddle-like for a negative disclination. With increasing orthotropy, the shape of the buckled plate becomes more tent-like and the Gaussian curvature spreads along the ridge of the tent. The stress fields are focused in the neighborhood of the defect point and the ridge, indicating that most of the stretching energy is accommodated in these singular regions.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Antu Acharya, Vikram Muthkani, Anirvan DasGupta, Atul Jain
Summary: This study proposes filler-based and infill-based strategies for creating auxetic lattices with enhanced stiffness. The elastic properties of the sinusoidal re-entrant honeycomb lattice are developed and validated using finite element models. Parametric studies are conducted to find combinations leading to enhanced stiffness with minor loss in auxeticity. The results demonstrate the possibility of achieving a significant increment in stiffness while retaining significant auxeticity. The proposed approaches outperform existing approaches in terms of stiffness and auxeticity.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Biswajit Pal, Ananth Ramaswamy
Summary: This study presents a multi-scale approach to simulate the shrinkage and creep of concrete, addressing the limitations of existing macroscopic prediction models due to the heterogeneous nature of concrete. The model is validated with experimental data and compared to national codes and macroscopic models, demonstrating its effectiveness in overcoming the gaps in existing models.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Akash Kumar Behera, Mohammad Masiur Rahaman, Debasish Roy
Summary: Ceramics have attractive properties but low fracture toughness is a major drawback. There is interest in improving the mechanical performance of ceramics by tailoring residual stresses. However, there is a lack of computational models that can accurately predict crack paths and quantify the improved fracture toughness.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Bineet Kumar, Sandeep Kumar Dubey, Sonalisa Ray
Summary: This study aims to develop an energy-based theoretical formulation for predicting the evolution of the fracture process zone in concrete under fatigue loading. Experimental results and calibrations indicate that the specimen size and aggregate size affect the fracture behavior and process zone length of concrete.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Zheliang Wang, Hao Sheng, Xinyi Lin, Yifan Rao, Jia Liu, Nanshu Lu
Summary: In this study, an analytical framework is proposed for investigating the behavior of laminated beams with any number of layers under various bending conditions, and the theory is validated through finite element analysis. It was found that the number of layers, applied deformation, layer properties, and layer aspect ratio have an impact on the equivalent flexural rigidity.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Michael Schwaighofer, Markus Konigsberger, Luis Zelaya-Lainez, Markus Lukacevic, Sebastian Serna-Loaiza, Michael Harasek, Florian Zikeli, Anton Friedl, Josef Fussl
Summary: In this study, nanoindentation relaxation tests were re-evaluated on five industrial lignins extracted from different feedstocks. It was found that the viscoelastic properties of all tested lignins were practically identical and independent of the feedstock and the extraction processes.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Tian Han, Dandan Qi, Jia Ma, Chaoyang Sun
Summary: In this study, a generative design method was used to propose new modified lattice structures suitable for tensile and compressive loading conditions. By conducting experimental and finite element analyses, it was confirmed that the derived structures have improved load-bearing capacity and energy absorption compared to the original structures. The effects of shape parameters on mechanical properties were also discussed.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Wenbin Zheng, Jay Airao, Ramin Aghababaei
Summary: Spinodal decomposition of Ti1-xAlxN crystal structure significantly affects their physical properties. This study uses three-dimensional molecular dynamics simulations to investigate the phase transformation mechanism and surface finish during material removal in TiAlN. The simulations reveal that the aluminum content and cutting depth have a significant influence on the phase transformation process through spinodal decomposition.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Atasi Ghosh
Summary: The micro-mechanism of low cycle fatigue deformation behavior has been summarized and the recent development in the approach of numerical simulation of cyclic stress-strain behavior of polycrystalline metallic materials at multi-scale has been discussed.
MECHANICS OF MATERIALS
(2024)