Article
Engineering, Multidisciplinary
Imad Hanhan, Michael D. Sangid
Summary: This study combines in-situ X-ray micro tomography experiments with finite element simulation to investigate the microstructural behavior and damage propagation in short fiber composites. It reveals the role of shear stress in interfacial cracking, hydrostatic stress in conoidal cracking, and environmental damage in longitudinal fiber breakage. Insights into stress states resulting in non-linear damage propagation in thermoplastic fiber composites are provided.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Engineering, Manufacturing
Anastasios Danezis, David Williams, Michael Edwards, Alexandros A. Skordos
Summary: Flashlamp systems introduce versatile heating methods to automated tape placement, offering better control and optimization potential. Studies show that parameters such as pulse duration and frequency significantly influence temperature distribution. The versatility of flashlamp heating expands the processing envelope of automated tape placement.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Mechanics
Faisal H. Bhuiyan, Ray S. Fertig
Summary: The study developed a physics-based multiscale fatigue damage analysis methodology and applied it to fatigue damage prediction in composite materials, enabling damage analysis and prediction of laminates in different directions under tensile loading.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Multidisciplinary
Mingshen Li, Xuhai Xiong, Shude Ji, Wei Hu, Yumei Yue
Summary: The TT-FSLW technique, with low rotational speed, has successfully eliminated common FSLW defects and enhanced the maximum shear strength of the joint significantly, making it superior to other conventional welding methods in joining metals and PMCs.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Engineering, Civil
Jianfeng Shi, Sijia Zhong, Xinyu Nie, Jun Shi, Jinyang Zheng
Summary: This study investigated the bearing capacity of steel wire reinforced thermoplastic pipes (PSP) under varying temperatures, finding that the fracture of steel wires leads to pipe failure and higher temperatures negatively impact the bending capacity of the pipes. A finite element (FE) model was subsequently established to analyze the failure process and influence factors of PSP under combined loads.
THIN-WALLED STRUCTURES
(2021)
Article
Polymer Science
Martijn Wismans, Sten J. J. van den Broek, Lambert C. A. van Breemen, Leon E. Govaert, Tom A. P. Engels
Summary: This study demonstrates that the strength of a short-fiber reinforced polymer measured in uniaxial tension is not indicative of its strength under multiaxial loading conditions. Physical aging is found to decrease strength in multiaxial loading but increase strength in uniaxial loading. A micromechanical analysis using 3D representative volume elements and a constitutive model is performed to explain these observations. The results highlight the importance of considering complex loading conditions when predicting strength.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Materials Science, Composites
Zhe Yang, Kunkun Fu, Zhongsen Zhang, Junming Zhang, Yan Li
Summary: This study presents an orthogonal-element solid orthotropic material with penalization (SOMP) topology optimization method that incorporates the 3D printing manufacturability of continuous carbon fiber reinforced composites (CCFRCs) and a printing path planning strategy. The results demonstrate the effectiveness of this method in optimizing structural design and improving material stiffness.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Multidisciplinary
Marco Monti, Marta Palenzona, Francesca Fiorino, Felix Baudach, Andrea Onnis, Andrea Romeo
Summary: This paper reports a study on the design, manufacturing, and finite element analysis prediction of a thermoplastic matrix/carbon fiber reinforced composite component. The use of rapid heat cycle molding improved the surface quality, and the developed FEA model accurately predicted the flexural behavior of the component.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Engineering, Manufacturing
Jinchuan Yang, Dongqing Wang, Menglei Li, Chunming Ji, Bing Wang
Summary: This study investigates the one-sided flame heating thermal response and pyrolysis behavior of carbon fiber/phthalonitrile composite laminates. A numerical model is established to generate data and analyze the pyrolysis characteristics of the material. The findings provide potential engineering guidance for the application of phthalonitrile composite materials in thermal protection and load-bearing integrated structures.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Review
Polymer Science
Basheer A. Alshammari, Mohammed S. Alsuhybani, Alaa M. Almushaikeh, Bander M. Alotaibi, Asma M. Alenad, Naif B. Alqahtani, Abdullah G. Alharbi
Summary: Carbon fiber-reinforced thermoplastic polymers have various advantages such as high strength-to-weight ratio, high wear resistance, and recyclability, making them widely used in industrial applications. The focus of the study is on the superiority of carbon fiber-reinforced thermoplastic polymers over thermosetting and elastomer polymers, as well as the in-depth exploration of surface modification techniques.
Article
Mechanics
Lina Riano, Jean-Francois Chailan, Yoann Joliff
Summary: This study simulated the effects of humid tropical aging on a unidirectional composite by considering an interphase region, using micromechanical approach. Numerical micro-models were developed to predict the mechanical behavior of the composite, with results showing the importance of considering composite interphase in numerical models for mechanical behavior.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Manufacturing
Jeremy Brockmann, Marco Salviato
Summary: This paper explores the global Mode I fracture energy of a carbon fiber composite subject to a biaxial stress state at the crack tip, specifically in which one stress component is compressive and parallel to the crack. It is found that there is a monotonic decrease in the Mode I fracture energy as the crack parallel compressive stress increases. This weakening effect is attributed to splitting cracks that are induced at the crack tip due to the crack parallel compression. The importance of using a crack band model coupled with a fully tensorial damage law to accurately predict fracture in composites is emphasized in this study.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Engineering, Manufacturing
Sarah A. Elnekhaily, Ramesh Talreja
Summary: This study uses computational simulation to investigate the early stage of crack formation in unidirectional composites under transverse tension with micro voids in the matrix. The focus is on brittle cavitation leading to fiber/matrix debonding, followed by debond crack growth and kink-out into the matrix. The study considers nonuniform fiber distribution and a uniform hexagonal fiber pattern in the cross section of the composite with voids near the initiated cracks. The results show that debond growth and kink-out are affected by circular voids in close proximity, especially when their diameter is a significant fraction of the fiber diameter.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Materials Science, Composites
Pritam Kulkarni, Kiran D. Mali, Sandeep Singh
Summary: This study examined the performance of unidirectional and quasi-isotropic carbon fiber reinforced polymer composite laminate with uniform and non-uniform out-of-plane waviness defects. Experimental tests and numerical simulations were conducted to investigate failure loads and damage mechanisms for different waviness cases. The findings showed a good agreement between experimental observations and finite element simulation results.
POLYMER COMPOSITES
(2022)
Article
Materials Science, Composites
Qi-Kun Feng, Jia-Yao Pei, Yong-Xin Zhang, Dong-Li Zhang, Di-Fan Liu, Jiang-Bo Ping, Zhi-Min Dang
Summary: Dielectric polymers with high energy density have attracted widespread attention in modern electronics and power systems. Improving the energy density of dielectric materials requires thermal treatment to modify the surface roughness of films and reduce local electric field distortion and charge injection. The thermal treated NBR/P(VDF-HFP) films exhibit higher breakdown strength and dielectric permittivity.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Dug-Joong Kim, Jaeyoung Lim, Byeunggun Nam, Hee-June Kim, Hak-Sung Kim
Summary: By utilizing design optimization and impact analysis, a composite B-pillar made of carbon-fiber-reinforced plastic (CFRP) was designed to improve impact performance and reduce weight compared to conventional steel B-pillars.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Yong-Rae Jang, Chung-Hyeon Ryu, Yeon-Taek Hwang, Hak-Sung Kim
Summary: The study investigated the effect of intense pulsed light on the sintering of screen-printed copper nano/micro-paste patterns, revealing that the widths and intervals of patterns affect the sintering behavior. With the same IPL irradiation energy, wider patterns and narrower intervals generate more heat, and uniform sintering in all regions can be achieved by adding virtual patterns.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Dong-Hyun Kim, Yeon-Taek Hwang, Hak-Sung Kim
Summary: This study investigated the mechanical properties and moisture related hygroscopic characteristics of semi-crystalline polypropylene (PP) with varying degree of crystallinity using molecular dynamics simulations and experiments. It was found that the degree of crystallinity significantly affects the hygro-mechanical properties of semi-crystalline PP.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2021)
Review
Green & Sustainable Science & Technology
Yong-Rae Jang, Sung-Jun Joo, Ji-Hyeon Chu, Hui-Jin Uhm, Jong-Whi Park, Chung-Hyeon Ryu, Myeong-Hyeon Yu, Hak-Sung Kim
Summary: Intense pulsed light (IPL) technology allows for quick heating of materials to create conductive layers, without damage to low temperature substrates, in ambient conditions and room temperature.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2021)
Article
Optics
Gyung-Hwan Oh, Heon-Su Kim, Dong-Woon Park, Hak-Sung Kim
OPTICS AND LASERS IN ENGINEERING
(2020)
Article
Materials Science, Multidisciplinary
Chung-Hyeon Ryu, Hui-Jin Um, Hak-Sung Kim
Article
Nanoscience & Nanotechnology
Jong-Whi Park, Chang-Jin Moon, Young-Min Ju, Yong-Rae Jang, Simon S. Park, Hak-Sung Kim
Summary: This study demonstrates the use of IPL for reducing GO to form a flexible ReRAM with high electrical performance. Optimizing the irradiation conditions leads to high retention and switching characteristics, with a depth gradient reduced GO layer. The ReRAM shows WORM characteristics, high on/off ratio, long retention time, and excellent mechanical endurance when fabricated on a flexible substrate.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Engineering, Multidisciplinary
Hui-Jin Um, Yeon-Taek Hwang, Il-Joon Bae, Hak-Sung Kim
Summary: In this study, an underbody shield made of carbon fiber reinforced thermoplastic composites was designed and manufactured to protect the lithium batteries in electric vehicles from impact damage. Through finite element analysis and optimization, the designed underbody shield successfully protected the battery from deformation and leakage during a vehicle crash test with a concrete obstacle.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Engineering, Electrical & Electronic
Jeong-Hyeon Baek, Dong-Woon Park, Gyung-Hwan Oh, Dong -Ok Kawk, Simon S. Park, Hak-Sung Kim
Summary: In this study, the cure shrinkage, internal strain development, and viscoelastic properties of epoxy molding compound (EMC) for semiconductor packaging were investigated using fiber Bragg grating (FBG) and dielectric sensors. The warpage of EMC-aluminum bi-layer strip was measured using digital image correlation (DIC). The results confirmed the importance of considering the cure shrinkage of EMC in predicting the warpage behavior of semiconductors.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Engineering, Multidisciplinary
Myeong-Hyeon Yu, Ji-Seok Lee, Hak-Sung Kim
Summary: Addressable conducting network (ACN) was used for damage sensing and self-healing of continuous carbon fiber reinforced nylon composite (CFRP). Machine learning was employed to accurately sense damage and generate local heating for self-healing. Self-healing conditions were determined using artificial neural network (ANN) based machine learning, achieving a healing efficiency of 98%.
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2023)
Article
Engineering, Multidisciplinary
Heon-Su Kim, Dong-Woon Park, Sang-Il Kim, Gyung-Hwan Oh, Hak-Sung Kim
Summary: This study presents a non-destructive evaluation method using a CNN-based THz signal processing to distinguish overlapping signals from micro-defects in GFRP composites. Theoretical models were devised to describe the propagation of the THz signal and its interaction with the micro-defects. THz signals were transformed into 2D spectrograms and used to train a CNN deep learning model for classifying the size and thickness of the defects. The CNN model achieved a 95% accuracy in differentiating micro-defects thinner than 20 μm.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Mechanics
Dug-Joong Kim, Gyu-Won Kim, Jeong-hyeon Baek, Byeunggun Nam, Hak-Sung Kim
Summary: A novel deep neural network was proposed for predicting the mechanical behavior of plain carbon fabric reinforced woven composites. The network was trained using a pre-simulated stress-strain curve database based on yarn structures and material properties. Micro-mechanics-based multi-scale analyses were conducted for progressive damage analysis, and the network was optimized using the Hyperband algorithm. The predicted mechanical behavior of the composites was validated through mechanical tests.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Manufacturing
Yeon-Taek Hwang, Hui-Jin Um, Hak-Sung Kim
Summary: In this study, the in-plane shear deformation of woven fabric composites during the forming process was predicted using finite element analysis. A multi-scale modeling approach was used to predict mechanical properties and damage progression based on a micro-scale fiber/matrix failure criterion using the strain invariant failure theory.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Engineering, Electrical & Electronic
Yong-Rae Jang, Sang-Jun Park, Jeong-Hyeon Baek, Tae-Hwa Kim, Hak-Sung Kim
Summary: This study predicted the thermal shock life cycle of a wide bandgap power module using finite element analysis. The analysis considered the thermal fatigue/creep deformation of Ag sintered joints and the viscoelastic properties of epoxy molding compounds under periodic thermal shock conditions. Creep tests and stress relaxation tests were conducted to obtain the creep properties and viscoelastic properties of the materials. The failure life cycle of the Ag sintered joints was calculated and confirmed through thermal shock tests.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Wan-Ho Chung, Yong-Rae Jang, Yeon-Taek Hwang, Sang-Ho Kim, Hak-Sung Kim
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)
