Article
Materials Science, Ceramics
Khaled H. Khafagy, Christopher Sorini, Travis Skinner, Aditi Chattopadhyay
Summary: In this study, a three-dimensional viscoplasticity formulation with progressive damage is developed to investigate the time-dependent constituent load transfer and damage behavior in ceramic matrix composites subjected to creep. The formulation, based on Hill's orthotropic plastic potential and the Norton-Bailey creep power law, is used to simulate creep behavior in single fiber SiC/SiC microcomposites. Results show excellent agreement with experimental and numerical data.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Fei Chen, Ke Yan, Yongsheng Zhu, Jun Hong
Summary: In this study, a modeling approach based on Voronoi tessellation was developed for whisker-reinforced ceramics (WRC), and the mechanical properties of 0-6 wt% ss-Si3N4w-reinforced Si3N4 ceramics (SWRSC) were predicted. The results showed that the flexural strength of SWRSC increased significantly with the increasing content of ss-Si3N4w. The enhancement mechanisms, including crack deflection, intergranular fracture, and load-bearing effect of ss-Si3N4w, were successfully simulated. The predicted values were consistent with experimental conclusions, confirming the effectiveness of the modeling method.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Manufacturing
Tingya Jia, Yong Deng, Yi Hao, Xinran Gao, Chao Zhang, Tianbao Cheng, Weiguo Li, Gunjin Yun
Summary: In this study, a physics-based temperature dependent analytical model for predicting the fracture strength of SiC fiber reinforced ceramic matrix composites (SiCf/CMCS) under high temperature oxidation environment is developed. The effects of temperature, strength of constituent material, high temperature oxidation, and residual thermal stress on fracture strength are included in the model. The model is verified by experimental results and comparison with other models, showing better agreement. Furthermore, the study analyzes the influencing factors of fracture strength evolution with oxidation temperature and time, fiber content and Young's modulus, and residual thermal stress. The reliable theoretical model provided in this study contributes to the prediction of high temperature fracture strength of SiCf/CMCS, and is helpful for mechanical property evaluation and property optimization under extreme environments.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Review
Materials Science, Multidisciplinary
Jinxing Sun, Daorong Ye, Ji Zou, Xiaoteng Chen, Yue Wang, Jinsi Yuan, Haowen Liang, Hongqiao Qu, Jon Binner, Jiaming Bai
Summary: Additive manufacturing (AM) has facilitated the production of highly customized, geometrically complex and functionalized parts in ceramic matrix composites (CMCs), resulting in improved properties and functionality compared to single-phase ceramic components. This article provides a comprehensive review on the capabilities and limitations of various AM techniques for CMCs, with a focus on the reported properties and potentials of AM-manufactured ceramic matrix composites.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Tanglong Zhu, Zhen Wang
Summary: This paper reviews the wide range of applications of carbon fiber reinforced ceramic composites in various fields and introduces their advantages in terms of high temperature resistance, low expansion, low density, and excellent thermal stability. The paper also summarizes the research on homogenization techniques, mechanical properties, thermal properties, and frictional properties of short carbon fiber reinforced ceramic composites, and briefly discusses different processing routes and their advantages and drawbacks. The future development direction of low-cost manufacturing of short carbon fiber reinforced ceramic composites is also prospected.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Engineering, Manufacturing
Marco Riva, Alessandro Airoldi, Antonio Maria Caporale, Lorenzo Cavalli, Mario De Stefano Fumo
Summary: This study investigates the interlaminar properties of a C/SiC composite produced by Liquid Silicon Infiltration through experiments and numerical analysis. Experimental methods are introduced to obtain pre-cracks with sharp tips at precise locations, and specimens with different thicknesses are used to study the effects of bending stress states in the delamination process. Numerical techniques are utilized to identify the properties of tri-linear Cohesive Zone Models for simulating delamination, without additional assumptions or testing. The study also considers fiber bridging effects and evaluates process zone lengths using different experimental, analytical, and numerical methods. Overall, the study provides qualitative insights into the delamination process of cost-affordable long fiber reinforced C/SiC laminates, and proposes an experimental and numerical protocol that takes into account the scattering of material properties.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Materials Science, Ceramics
Minzhong Huang, Yangyang Wu, Jun Ou, Yao Huang, Junye Wang, Shanghua Wu
Summary: In this study, a DLP 3D-printing strategy was developed to fabricate SiCN ceramic matrix composites with improved mechanical properties. The introduction of fillers effectively reduced shrinkage and weight loss, while enhancing the bending strength of SiCN CMCs.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Kazuya Shimoda, Hideki Kakisawa
Summary: This study presents a new method of producing high-quality SiC/SiC ceramic-matrix composites. A SiC slurry with binders was used to impregnate SiC fibers and form green sheets without fibers, which were then sandwiched between two SiC green sheets and warm-pressed. The resulting composites exhibited excellent bending strength and tensile properties due to the controllable sheet thickness and smoother fiber bundles of the sandwich prepreg sheets.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Yong Deng, Weiguo Li, Jianzuo Ma, Ying Li
Summary: This research investigates the combined influence of residual thermal stress, interface debonding and oxidation, and temperature on the first matrix cracking stress of fiber reinforced ceramic-matrix composites. A thermal-mechanical-oxidation coupled first matrix cracking stress model is proposed and validated with experimental results, offering a quantitative tool for evaluating the matrix cracking behavior of FRCMCs.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Hedieh Farhandi, Md Nurul Karim, Renato S. M. Almeida, Kamen Tushtev, Kurosch Rezwan
Summary: This study investigated the applicability of two-step sintering method for the production of Ox-CMCs based on Nextel 610 fibers and porous alumina matrix. Results showed that TSS samples exhibited higher tensile strength and most densification occurred during the first phase of the process, with the matrix gradually strengthened in the second step.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Engineering, Manufacturing
Ningning Yan, Qiangang Fu, Running Wang, Jiaping Zhang, Ningkun Liu, Bo Li, Qingliang Shen, Jia Sun
Summary: The study indicates that the compressive strength of ZrC/C composites fluctuates with the increase in strain rate, and the electrical resistance increases; increasing the ZrC/PyC weight ratio can enhance the hardness and modulus of the composites.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Mechanics
A. G. Sheinerman
Summary: This article proposes a model to describe the combined effects of crack bridging and ceramic/graphene interface strength on the fracture toughness of fully dense ceramic/graphene composites. By considering the situation where ceramic/graphene interfaces are weaker than the matrix grain boundaries, the model calculates the effects of graphene content and interface strength on the fracture toughness of composites using fracture mechanics combined with percolation theory. The calculations reveal the transition from toughening to fracture toughness reduction due to crack percolation over ceramic/graphene interfaces, indicating that high toughness ceramic/graphene composites should have large graphene platelets and/or small grain size.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2023)
Article
Materials Science, Ceramics
Qi Wang, Qiaoying Shi, Yihuan Yuan, Lifu Chen, Ming Tang, Siwei Li
Summary: The preparation of polymer-derived-SiC ceramic fibers reinforced 7075 aluminum alloy composites and the effect of carbon coating on the fiber surface were investigated. The results showed that carbon coating can improve the interfacial bonding strength and mechanical properties of the composites.
CERAMICS INTERNATIONAL
(2023)
Article
Mechanics
Guoqiang Yu, Yunfa Jia, Chuyang Xie, Jinkang Du, Xiguang Gao, Yingdong Song, Fang Wang
Summary: This paper successfully conducted experiments on ceramic matrix mini-composites (CMMC) in transverse tensile mechanical testing. The difficulties in material preparation, specimen design, gripping method, loading strategy, deformation measurement, transverse tensile stress calculation were overcome. The obtained stress-strain responses showed a strong non-linear relationship and a positive correlation between the elastic modulus and matrix volume fraction. By utilizing digital image correlation (DIC), the staged transverse tensile strain field evolution process was analyzed, and crack initiation and propagation were clearly captured. Additionally, a novel DIC data analysis strategy was applied to investigate the uniformity variation of the transverse tensile strain field. The paper also discussed the relationship between local damage and overall mechanical responses, as well as the localization and non-uniformity characteristics of damage evolution. The impact of microstructure on transverse tensile elastic modulus was analyzed, and a model considering the microstructure was built for prediction.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Ceramics
Federico Smeacetto, Fabiana D'Isanto, Valentina Casalegno, Peter Tatarko, Milena Salvo
Summary: The ceramic matrix composites integration requires a reliable joining technique, with an ytterbium disilicate based glass-ceramic material showing promise for joining SiC/SiC and C/SiC composites. The material exhibits an apparent shear strength of 35 MPa and self-healing behavior at elevated temperatures, making it a potential joining material for CMCs.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Engineering, Multidisciplinary
Y. Gowayed, E. Abouzeida, I. Smyth, G. Ojard, J. Ahmad, U. Santhosh, G. Jefferson
COMPOSITES PART B-ENGINEERING
(2015)
Article
Engineering, Multidisciplinary
Unni Santhosh, Jalees Ahmad, Greg Ojard, Robert Miller, Yasser Gowayed
COMPOSITES PART B-ENGINEERING
(2016)
Article
Engineering, Aerospace
Unni Santhosh, Jalees Ahmad, Sujith Kalarikkal, Greg Ojard, Yasser Gowayed
JOURNAL OF AEROSPACE ENGINEERING
(2018)
Article
Materials Science, Characterization & Testing
Unni Santhosh, Yasser Gowayed, Greg Ojard, Imelda Smyth, Sujith Kalarikkal, George Jefferson
JOURNAL OF NONDESTRUCTIVE EVALUATION
(2018)
Article
Materials Science, Composites
Unni Santhosh, Jalees Ahmad
JOURNAL OF COMPOSITE MATERIALS
(2013)
Article
Materials Science, Composites
Unni Santhosh, Jalees Ahmad
JOURNAL OF COMPOSITE MATERIALS
(2014)
Article
Materials Science, Composites
Y. Gowayed, G. Ojard, U. Santhosh, G. Jefferson
JOURNAL OF COMPOSITE MATERIALS
(2015)
Article
Materials Science, Ceramics
Unni Santhosh, Jalees Ahmad, Greg Ojard, Yasser Gowayed
Summary: This study presents a micromechanics-based modeling approach that considers deformation, damage, and oxidation in each component of silicon carbide-based ceramic matrix composites. Chemical kinetics models are combined with a progressive damage model, and rupture predictions are compared with experimental measurements to assess the efficacy of the modeling approach. Various techniques for improving creep rupture life are explored using the model.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Unni Santhosh, Jalees Ahmad, Timothy Easler, Yasser Gowayed
Summary: This study presents a physics-based model to simulate the process of polymer infiltration and pyrolysis (PIP) manufacturing for ceramic matrix composites (CMCs). Through laboratory experiments and analytical modeling, the distribution of constituents and porosity inside the composite at different PIP stages were characterized and shown to agree with physical measurements.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Unni Santhosh, Jalees Ahmad, Greg Ojard, Yasser Gowayed
Summary: Results from fatigue experiments on a SiC/SiC composite are presented. A micromechanics-based model is used to study the observed behavior and the model considers progressive damage, creep, and oxidation. The deformation during fatigue in this material is primarily explained by damage in the form of matrix microcracking and interface debonding, along with creep. The stiffness of the material does not significantly change during fatigue, indicating limited contribution of fiber fracture to deformation.
CERAMICS INTERNATIONAL
(2022)
Review
Materials Science, Composites
Yasser Gowayed, Greg Ojard, Robert Miller, Unni Santhosh, Jalees Ahmad
Summary: This study aims to investigate the role of loading frequency in strain accumulation during time-dependent tests of Melt-infiltrated SiC/SiC CMCs. The test samples were subjected to different stress levels, load frequencies, and temperatures. The results showed that the average strain to failure during residual tests, combined with the strain accumulated during time-dependent tests, was 0.005 with a small standard deviation, suggesting that the material may have a finite strain capacity. Additionally, all time-dependent tests were successfully fitted using a single equation, indicating that loading frequency may have minimal or negligible effect on the strain-rate.
JOURNAL OF COMPOSITE MATERIALS
(2022)
Article
Engineering, Multidisciplinary
Unni Santhosh, Jalees Ahmad
Summary: A modeling methodology for ceramic matrix composites that considers the interaction between progressive damage and oxidation kinetics is discussed, with blind predictions of structural response compared to experimental data to assess model quality and limitations, leading to identification of areas for future work.
INTERNATIONAL JOURNAL FOR MULTISCALE COMPUTATIONAL ENGINEERING
(2021)
Article
Materials Science, Composites
Jalees Ahmad, Unni Santhosh, Swamy Chandu
JOURNAL OF COMPOSITES SCIENCE
(2020)
Article
Materials Science, Composites
Unni Santhosh, Jalees Ahmad
COMPOSITES PART C: OPEN ACCESS
(2020)
Proceedings Paper
Physics, Applied
Zhong Ouyang, Imelda Smyth, Greg Ojard, Unni Santhosh, Jalees Ahmad, Yasser Gowayed
40TH ANNUAL REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: INCORPORATING THE 10TH INTERNATIONAL CONFERENCE ON BARKHAUSEN NOISE AND MICROMAGNETIC TESTING, VOLS 33A & 33B
(2014)
Article
Engineering, Multidisciplinary
Keyu Zhu, Xitao Zheng, Jing Peng, Jiaming Sun, Ruilin Huang, Leilei Yan
Summary: This paper discusses the influence of multiple impacts on the compression strength of honeycomb sandwich structures with composite face sheets. It is found that the size of the impactor affects the turning point of the compression strength. Additionally, high impact energy leads to damage in the bottom face sheet and reduces the overall compression strength.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Danqian Wang, Yanfei Yue, Jueshi Qian
Summary: Magnesium Potassium Phosphate Cement (MKPC) as a binder for steel rebars shows improved corrosion resistance when subjected to carbonation, due to the increase in pH and the formation of a more protective oxide film.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Zhibin Li, Wenyu Wang, Pengcheng Xue, Xingyu Wei, Jian Xiong
Summary: This work proposes a design approach and manufacturing method for carbon fiber reinforced plastic (CFRP) corrugated sandwich truncated cones (CSTC) to improve their anti-debonding ability and ensure reliability. The study establishes theoretical models for CSTCs' stiffness and failure modes, which are verified through experiments and finite element analysis (FEA). The research reveals the effect of geometric parameters on failure modes and performs an optimal design for CSTC structures. The findings have significant implications for the design and application of lightweight CSTCs in constructions, such as launch vehicle adapters.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Mingyu Zhang, Lei Chu, Jiahua Chen, Fuxun Qi, Xiaoyan Li, Xinliang Chen, Deng-Guang Yu
Summary: This review summarizes the different structures and construction methods of fibrous membranes with asymmetric wettability. It also reviews the biological applications of these membranes and suggests future challenges.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
E. Mofakhami, L. Gervat, B. Fayolle, G. Miquelard-Garnier, C. Ovalle, L. Laiarinandrasana
Summary: This study investigates the effects of fibre concentration on the mechanical response of welded glass-fibre-reinforced polypropylene (GF-PP). Experimental observations reveal a significant reduction in weld ratio, up to 60%, indicating a decreased strength compared to the bulk material. Increasing fibre content in the welded material results in a decrease in stress at break and strain at the maximum stress. The use of DIC technique and X-ray microtomography further confirms the localized strain amplification in the welded zone due to the significant increase in fibre density.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Emad Pourahmadi, Farjad Shadmehri, Rajamohan Ganesan
Summary: This research compares the mechanical properties of laminates manufactured using automated fiber placement and conventional autoclave curing methods. The results show that laminates manufactured using automated fiber placement have a lower interlaminar shear strength compared to laminates reconsolidated using autoclave curing. A finite element simulation method is proposed to quantitatively analyze these differences.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Johnny Jakobsen, Benny Endelt, Fahimeh Shakibapour
Summary: This study proposes a new bolted/pinned joining method for composite applications, which improves load transfer by introducing a patch-type reinforcement. Experimental results demonstrate significant improvements in both static and fatigue load conditions compared to existing methods. Finite element simulations highlight the advantage of this method, as it creates a more efficient load-transferring mechanism through different stress distributions.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Gisele G. Cintra, Janine D. Vieira, Daniel C. T. Cardoso, Thomas Keller
Summary: This paper proposes a novel approach to assess multi-crack behavior in layered fiber-polymer composites. The generated Compliance and R-curves provide useful insights into understanding the multiple delamination process and allow for separate evaluation of strain energy release rate (SERR) for each crack. The developed cohesive zone model successfully simulates the failure process zone of three parallel cracks, showing good agreement between the numerical model and experimental results.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Renil Thomas Kidangan, Sreedhar Unnikrishnakurup, C. Krishnamurthy, Krishnan Balasubramaniam
Summary: The induction heating process can accurately identify fiber orientation and stacking order, making it a valuable tool for large-area inspection and quality control in manufacturing fiber-reinforced composites.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Sungjun Hwang, Yousoo Han, Douglas J. Gardner
Summary: Bleached Kraft pulp, unbleached Kraft pulp, and old corrugated cardboard pulp are suitable for producing cellulose nanofibril suspensions. Spray drying is a fast, simple, cost-effective, and scalable drying method. Spray-dried cellulose nanofibrils can be used as reinforcing materials in polypropylene matrices. The particle size of cellulose nanofibrils affects the material properties.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Mehdi Mahdavi, Abbas Zolfaghari
Summary: This study aims to improve the recovery forces of shape memory polymers (SMPs) through material extrusion additive manufacturing. By using glass fiber (GF) as reinforcement and manufacturing multi-layer composite specimens, it was found that PLA with 6.62% GF exhibited the best recovery force, which was further optimized through annealing heat treatment.
COMPOSITES PART B-ENGINEERING
(2024)
Review
Engineering, Multidisciplinary
Xiang Ao, Antonio Vazquez-Lopez, Davide Mocerino, Carlos Gonzalez, De-Yi Wang
Summary: The vulnerability of natural fibers to heat and fire poses a significant challenge for their substitution of traditional fiber reinforcements in composite materials. Natural fiber/polymer composites (NFCs) are regarded as potential candidates for engineering applications due to their environmental friendliness and low-impact sourcing. Thus, appropriate approaches need to be implemented to enhance the fire safety of NFCs. This review summarizes and discusses the latest understanding of flammability and thermal properties of natural fibers, with a special focus on their interaction with polymer matrix in fire behavior. Additionally, the latest developments in flame-retardant approaches for NFCs are reviewed, covering both flame retardancy and fire structural integrity. Finally, future prospects and perspectives on fire safety of NFCs are proposed, providing insights into further advancements of NFCs.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Cheng Wang, Siqi Huo, Guofeng Ye, Bingtao Wang, Zhenghong Guo, Qi Zhang, Pingan Song, Hao Wang, Zhitian Liu
Summary: The demand for multifunctional, transparent epoxy resin with superior dielectric, mechanical, and fire-safety performances is increasing in modern industries. Researchers have developed an epoxidized, phosphaphenanthrene-containing poly(styrene butadiene styrene) (ESD) for advanced fire-safe epoxy resin, which maintains high transparency and improves UV-blocking property. The addition of 10 wt% ESD results in improved mechanical properties, decreased dielectric constant and loss, and outperformance compared to other fire-safe epoxy resins. This research provides an effective method for developing multifunctional flame-retardant epoxy resin.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Bo Pang, Heping Zheng, Zuquan Jin, Dongshuai Hou, Yunsheng Zhang, Xiaoyun Song, Yanan Sun, Zhiyong Liu, Wei She, Lin Yang, Mengyuan Li
Summary: This study develops an internal superhydrophobic material (ISM) using waste denitrification fly ash, which maintains stable hydrophobicity under harsh conditions of use and does not rely on expensive fluor-based surface modifications. The synthesized ISM has excellent matrix strength, strong waterproof properties, and retains superhydrophobicity even at damaged or friction interfaces.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Meirbek Mussatayev, Qiuji Yi, Mark Fitzgerald, Vincent K. Maes, Paul Wilcox, Robert Hughes
Summary: Real-time monitoring of carbon fibre composites during Automated Fibre Placement (AFP) manufacturing remains a challenge for non-destructive evaluation (NDE) techniques. This study designed a directional eddy-current (EC) probe to evaluate the detectability of out-of-plane wrinkles. Experimental evaluations and finite element modeling were conducted to better understand the relationship between eddy-current density and defect detection. The findings suggest that the probe configuration with an asymmetric driver coil and differential pickup coils shows the best capability for wrinkle detection.
COMPOSITES PART B-ENGINEERING
(2024)
