Article
Engineering, Manufacturing
M. Gljuscic, M. Franulovic, D. Lanc, A. Zerovnik
Summary: The development of additive manufacturing technologies has led to an increase in material variety, particularly by introducing various reinforcements to enhance the mechanical performance of polymers. This study proposes a microscale analysis method based on representative volume element (RVE) models and statistically significant data acquired from microscopic analysis, in order to optimize the microstructure parameters before experimental validation. The results of experimental and numerical tests on carbon fiber reinforced composites were systematically compared with published data, providing guidance for protocol applicability and the need for further improvements.
ADDITIVE MANUFACTURING
(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
Chemistry, Physical
Krystyna Mika, Ewelina Wiercigroch, Marcin Pisarek, Marcin Koziel, Dorota Majda, Anton S. Lytvynenko, Grzegorz D. Sulka, Leszek Zaraska
Summary: This study demonstrates the electrochemical generation of nanowire arrays via one-step anodic oxidation of Zn in carbonate-based electrolytes with different pH values. The morphology of the anodic films was characterized, and the composition of the nanomaterials was analyzed using various techniques. The formation of a previously unknown phase of zinc carbonate and the generation of ZnO were observed during the anodization process. The changes occurring during thermal treatment and the photoelectrochemical performance of the ZnO nanostructures were also investigated.
APPLIED SURFACE SCIENCE
(2023)
Article
Construction & Building Technology
Juan Wang, Xun Li, Cuixia Wang, Chao Zhang, Hongyuan Fang, Yu Deng
Summary: This study explored the impact of microstructure of two-component foaming polyurethane on its macroscopic performance and proposed a method to quantitatively determine the size of polymer RVE. The results showed that the density of the polymer had an influence on the geometric RVE size, with cell content being the main factor determining the RVE size.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Indrajit V. Bagal, Pratik Mane, Maheshwari Arunachalam, Hyojung Bae, Mandar A. Kulkarni, Fawad Tariq, Soon Hyung Kang, Jun-Seok Ha, Sang-Wan Ryu
Summary: By constructing a type-II heterostructure of N-doped ZnO nanowires with an ultra-thin ZnS layer, a core-shell structure is formed which can accelerate the charge transfer process and significantly enhance the resistance to photo-corrosion of N-doped ZnO NWs. The optimal ZnS/N:ZnO core-shell nanowires exhibited a photocurrent density of 0.85 mA cm(-2) at 1.23 Vs RHE, which was 3-fold higher than ZnO nanowires. The reported approach provides possibilities for the construction of efficient and highly stable PEC water-splitting devices.
MATERIALS TODAY PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Jiangyang Liu, Kazuki Nagashima, Yuki Nagamatsu, Takuro Hosomi, Hikaru Saito, Chen Wang, Wataru Mizukami, Guozhu Zhang, Benjarong Samransuksamer, Tsunaki Takahashi, Masaki Kanai, Takao Yasui, Yoshinobu Baba, Takeshi Yanagida
Summary: The surface cation composition of nanoscale metal oxides plays a critical role in determining the properties of various chemical processes, such as catalysts and molecular sensors. This study focused on the modulation of cation composition on the surface of ZnO/(Cu1-xZnx)O heterostructured nanowires and found that an increase in surface copper content suppresses the adsorption of nonanal and the aldol condensation reaction. Spectroscopic analysis and theoretical simulations revealed that surface Cu2+ sites were inactive, explaining the observed weak molecular adsorption behaviors and suppressed reactions. This tailored cation composition surface also showed improvements in electrical molecular sensing of nonanal.
Article
Materials Science, Multidisciplinary
Chaocan Cai, Bo Wang, Weilong Yin, Zhonghai Xu, Rongguo Wang, Xiaodong He
Summary: This work proposes a novel algorithm based on the bionic optimization technology of Cuckoo search algorithm to generate three-dimensional random spatial distribution representative volume elements (RVEs) of composite materials. The algorithm overcomes the limitations of previous approaches and is capable of generating nonuniformly dispersed microstructures with high fiber volume fractions and specified inter-fiber distances. Statistical analysis is conducted to evaluate the generated RVEs, and the results are validated against experimental data. The algorithm is further validated through finite element method and volume homogenization to predict the elastic properties of the RVEs.
MATERIALS & DESIGN
(2022)
Article
Construction & Building Technology
P. S. M. Thilakarathna, P. Mendis, H. Lee, E. R. K. Chandrathilaka, V. Vimonsatit, K. S. Kristombu Baduge
Summary: In this paper, a multiscale modelling method is proposed to predict the macroscopic elastic modulus of Ultra-High Strength Concrete (UHSC). By using techniques such as nanoindentation experiments, hydration simulations, scanning electron microscopy, and finite element modelling, the macroscopic and microstructural characteristics of UHSC are investigated. The analysis of material response at different scales provides a better understanding of the contribution to the macroscopic behavior of UHSC.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Multidisciplinary
Tongming Qu, Yuntian Feng, Min Wang
Summary: This work develops an adaptive RVE model combined with an EPB algorithm for hierarchical multiscale analysis of granular materials undergoing large deformation, addressing the issue of loss of representativeness in current RVE models.
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
(2021)
Article
Mathematics, Applied
Alexandre D. C. Amaro, A. Francisca Carvalho Alves, F. M. Andrade Pires
Summary: This study focuses on analyzing various deformation mechanisms that affect the behavior of PC/ABS blends using computational homogenization. By establishing a representative microstructural volume element, defining the constitutive description of the material phases, and modeling the interfaces and matrix damage, accurate predictions can be achieved. The findings have important implications for broader applications beyond PC/ABS blends.
FINITE ELEMENTS IN ANALYSIS AND DESIGN
(2024)
Article
Materials Science, Composites
Marco Petrolo, Alfonso Pagani, Mattia Trombini, Rebecca Masia, Erasmo Carrera
Summary: This study presents numerical simulations investigating the effects of different void percentages on the Coefficient of Thermal Expansion (CTE) and local stress fields of composite materials. The results demonstrate that voids significantly affect the local stress fields, with higher void fractions leading to greater variability of stress peaks.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2023)
Article
Chemistry, Multidisciplinary
Mingwei Li, Zhifang Zhou, Meng Chen, Jian Wu
Summary: Studying the topological characteristics of fractured rock mass can help estimate the topological representative element volume (TREV) and accurately calculate the permeability representative element volume (PREV), simplifying the seepage calculation process.
APPLIED SCIENCES-BASEL
(2022)
Article
Materials Science, Multidisciplinary
R. Hari Sankar, Harpreet Singh
Summary: Acknowledging the demand for composites in the engineering industry, this paper focuses on microscale failure of composites and the use of multiscale modelling techniques for improvement. The study proposes a technique to mitigate mesh sensitivity in representative volume element (RVE) modelling and formulates modified periodic boundary conditions (MPBCs) to attenuate size dependency. The ability of MPBCs to reduce the effect of RVE size on material response is verified through analysis of 1200 RVE samples.
MECHANICS OF MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Qingping Sun, Shahryar Asqardoust, Abhishek Sarmah, Mukesh K. Jain
Summary: This paper addresses the challenge of reconstructing the randomly distributed second-phase particle-strengthened microstructure of AA7075-O aluminum sheet material for computational analysis. A theoretical framework for analysis of elastic-plastic deformation of such 3D microstructures is developed. The results show that the real 3D microstructure-based models can accurately predict the plastic deformation and interfacial failure evolution in AA7075-O aluminum sheet.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
R. B. Vieira, H. Sehitoglu, J. Lambros
Summary: Homogenization techniques are widely used to predict the macroscopic response of materials based on microscale results. This study experimentally determined the RVE size for an austenitic stainless steel alloy under plasticity and creep loading conditions, and found that RVE sizes were considerably smaller when grain boundary sliding was the dominant deformation mechanism.
Article
Chemistry, Multidisciplinary
Siqi Wang, Jesse Echeverry, Luis Trevisi, Kiana Prather, Liangzhong Xiang, Yingtao Liu
APPLIED SCIENCES-BASEL
(2020)
Article
Engineering, Multidisciplinary
Blake Herren, Mrinal C. Saha, M. Cengiz Altan, Yingtao Liu
COMPOSITES PART B-ENGINEERING
(2020)
Article
Materials Science, Multidisciplinary
Sergio A. Pineda-Castillo, Jishan Luo, Hyowon Lee, Bradley N. Bohnstedt, Yingtao Liu, Chung-Hao Lee
Summary: This study investigates the infiltration of carbon nanotubes in polyurethane SMP foam to design electrically triggered embolic devices for intracranial aneurysms. The results show that CNTs can reduce the glass transition temperature of the SMP and alter its mechanical properties, providing a promising approach for individualized treatment of aneurysms. Furthermore, the study demonstrates the Joule-heating triggering for SMP shape recovery in endovascular therapy applications.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Parisa Marashizadeh, Mohammad Abshirini, Mrinal Saha, Liangliang Huang, Yingtao Liu
Summary: The study investigated the interfacial properties of ZnO nanowire/carbon fiber-reinforced epoxy composites using MD simulations. Results showed that the addition of ZnO nanowires increased the interfacial strength and adhesion energy of the hybrid system.
Article
Polymer Science
Christopher Billings, Changjie Cai, Yingtao Liu
Summary: This study focuses on additive manufacturing and characterization of nanoparticle-reinforced photocurable resin-based nanocomposites with potential antimicrobial properties. By using digital light processing, these nanocomposites exhibit outstanding mechanical properties, surface quality, and water resistance capability, showing promise for long-term usage in improving public health.
Article
Chemistry, Multidisciplinary
Blake Herren, Vincent Webster, Eric Davidson, Mrinal C. Saha, M. Cengiz Altan, Yingtao Liu
Summary: Porous piezoresistive sensors were developed using a microwave-based rapid porogen removal technique, allowing for customization of electrical properties by varying porogen amounts and CNT loadings. Sensors with 3 wt% CNT loading demonstrated the highest piezoresistive sensitivity, while those with low porosity showed long-term durability.
Article
Nanoscience & Nanotechnology
Parisa Marashizadeh, Mohammad Abshirini, Mrinal Saha, Liangliang Huang, Yingtao Liu
Summary: This study investigated the interfacial properties of ZnO nanowire-enhanced carbon fiber polymer composites, showing that reducing the diameter of ZnO NW can improve interfacial properties, while increasing the loading temperature weakens the interface. The results also revealed the sensitivity of the interface to the twisting angle of ZnO with respect to graphene's crystal.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Jingyu Wang, Parisa Marashizadeh, Binbin Weng, Preston Larson, M. Cengiz Altan, Yingtao Liu
Summary: This paper presents the synthesis, characterization, and multiscale modeling of hybrid composites with enhanced interfacial properties consisting of aligned zinc oxide (ZnO) nanowires and continuous carbon fibers. Experimental results show that the nanowire-reinforced carbon fiber composites exhibit significant improvements in interfacial properties and mechanical performance.
Article
Polymer Science
Blake Herren, Mrinal C. Saha, M. Cengiz Altan, Yingtao Liu
Summary: Floating vessel-type oil collecting devices based on sorbent materials offer potential solutions to oil spill cleanup, allowing efficient and continuous extraction of various oils from the water surface using a novel funnel-shaped sorbent and vessel design.
Article
Chemistry, Multidisciplinary
Duncan A. Merchan-Breuer, Ethan Murphy, Benjamin Berka, Luis Carlos Mendoza Nova, Yingtao Liu, Wilson Merchan-Merchan
Summary: In this study, the effect of different fuel types, flame structures, and oxygen content on the formation of hydrophobic carbon layers was investigated. It was found that gaseous fuel (methane) and oxygen enrichment can lead to significant differences in the structure and morphology of the deposited soot layers. The formed hydrophobic carbon layers were tested for their water repellency and analyzed using scanning electron microscopy.
APPLIED SCIENCES-BASEL
(2022)
Article
Multidisciplinary Sciences
Parisa Marashizadeh, Mohammad Abshirini, Mrinal Saha, Liangliang Huang, Yingtao Liu
Summary: This study presents atomistic characterization of the interfacial properties of fiber matrix in hybrid functionalized carbon fiber reinforced polymer composites. By employing molecular dynamics simulation technique, the interfacial strength and cohesive energy of functionalized models are found to be significantly enhanced. The impact of carboxyl functional group on traction-separation response is the most significant. Comparing different structures, it is found that adding ZnO nanowire can compensate for the grafting effect. Combining the growth of ZnO nanowire and functionalization can greatly enhance the interfacial strength of carbon fiber composites in both opening and sliding modes.
ADVANCED THEORY AND SIMULATIONS
(2022)
Review
Polymer Science
Sergio A. Pineda-Castillo, Aryn M. Stiles, Bradley N. Bohnstedt, Hyowon Lee, Yingtao Liu, Chung-Hao Lee
Summary: Devices for endovascular embolization of intracranial aneurysms face limitations in achieving complete occlusion. Shape memory polymers have the potential to improve occlusion rates by tailoring to a patient's condition. However, there are still limitations that need to be addressed for effective treatment.
Article
Materials Science, Composites
Christopher Billings, Peter Kim, Tyler Shadid, Jimmy D. Ballard, Changjie Cai, Yingtao Liu
Summary: This article presents the creation of novel nanocomposites using a masked stereolithography additive machine and characterizes their mechanical and surface properties. The results demonstrate that the addition of zinc oxide enhances the mechanical strength and reduces wettability of the composites, while also providing antibacterial properties. This research is significant for improving public health options through low-cost additive manufacturing.
JOURNAL OF COMPOSITES SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Mohammad Abshirini, Parisa Marashizadeh, Mrinal C. Saha, M. Cengiz Altan, Yingtao Liu
Summary: This study demonstrates the 3D printing of highly flexible, ultralightweight, and conductive polymer nanocomposites (CPNCs) with dual-scale porosity and piezoresistive sensing functions. The CPNC structures are achieved by designing structural printing patterns and utilizing phase separation of the polymer ink solution. The mechanical and piezoresistive behavior of the CPNC structures are explored by controlling the macro- and microscale porosity. The developed porous CPNCs show enhanced flexibility and sensitivity, and can be applied as piezoresistive sensors for detecting human motion.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Biotechnology & Applied Microbiology
Nicholas Castle, Junfeng Liang, Matthew Smith, Brett Petersen, Cayman Matson, Tara Eldridge, Ke Zhang, Chung-Hao Lee, Yingtao Liu, Chenkai Dai
Summary: This paper presents a finite element model of the chinchilla inner ear, which is used to study the relationship between the insertion angle of a cochlear implant electrode and the mechanical function. The application of this model found minimal loss of residual hearing due to insertion angle, indicating its reliability and usefulness in future cochlear implant design, surgical planning, and stimuli setup.
BIOENGINEERING-BASEL
(2023)
