Article
Polymer Science
Fuhua Lin, Mi Zhang, Xiangyang Li, Shuangdan Mao, Yinghui Wei
Summary: This study aims to enhance the flame retardancy performance of high impact polystyrene (HIPS) by incorporating intumescent flame retardant (IFR) and diatoms into the HIPS matrix. The results show that the IFR/diatoms system exhibits high flame retardant efficiency and catalytic carbonization effect, reducing heat release and smoke generation while improving tensile and impact strength.
Article
Polymer Science
Zheng Yang, Xueting Chen, Shike Lu, Zhenhua Wang, Jiantong Li, Baoying Liu, Xiaomin Fang, Tao Ding, Yuanqing Xu
Summary: The ammonium polyphosphate (APP) was modified by a titanate coupling agent to form a new type of intumescent flame retardant (Ti-IFR) when compounded with benzoxazine (BOZ) and melamine (ME). CaCO3 was used as a synergist with Ti-IFR to modify polyoxymethylene (POM). The flame-retardant properties and mechanism of the composites were analyzed, and it was found that Ti-IFR enhanced the gas phase flame retardant effect, while CaCO3 strengthened the barrier effect in the condensed phase. When used together, they exhibited excellent synergistic effect.
Article
Polymer Science
Yan Zhang, Fenglong Lin, Yincai Wu, Shenglong Wang, Ziteng Liu, Lijun Song
Summary: In this study, cerium based DOPO derivative (Ce@DDP) was synthesized by hydrothermal method and its effects on flame retardancy, thermal stability, and mechanical properties of intumescent flame retardant polypropylene (PP) were investigated. The results showed that when adding 17 wt% of intumescent flame retardants (IFR) and 1 wt% of Ce@DDP, the peak heat release rate (PHRR) and peak smoke production rate (PSPR) of the resulting PP composite were reduced by 62.0% and 42.3%, respectively. Furthermore, Ce@DDP significantly improved the thermal stability and char formation ability of PP/IFR.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Seung Hun Lee, Seul Gi Lee, Jun Seo Lee, Byung Chol Ma
Summary: Combinations of multiple inorganic fillers can enhance the flame retardancy of rigid polyurethane foam, improving thermal stability and fire resistance.
Review
Construction & Building Technology
Shazzuan Shahari, M. Fathullah, Mohd Mustafa Al Bakri Abdullah, Z. Shayfull, Mozammel Mia, Vertic Eridani Budi Darmawan
Summary: Glass fibre reinforced epoxy composites are widely used in various industries due to their excellent properties, but the flammability of epoxy poses a fire risk. The incorporation of fire retardants and protective coatings can effectively enhance the fire performance of the composites.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Polymer Science
Yajie Li, Haicun Yang, Azita Ahmadi, Aziz Omari, Hongting Pu
Summary: In this study, multilayer separators with high thermal stability and flame retardancy are efficiently prepared by blending heat resistant reinforcing component with PP and PE. The prepared separators exhibit good dimensional stability, flame retardancy, and a wide shutdown temperature window, making them suitable for high-power batteries.
Article
Green & Sustainable Science & Technology
Xingguo Wang, Wenjia Wang, Shuheng Wang, Yufan Yang, Hongfei Li, Jun Sun, Xiaoyu Gu, Sheng Zhang
Summary: A novel halogen-free self-intumescent polyelectrolyte was synthesized and used to improve the flame retardancy of PLA nonwovens, showing significant results with potential to produce cleaner commercialized flame-retardant materials.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Applied
Akos Pomazi, Andrea Toldy
Summary: The research focuses on developing multifunctional, flame retarded epoxy gelcoat formulations using phosphorus-containing intumescent flame retardant. The study found that epoxy resin-based gelcoats with ammonium polyphosphate (APP) exhibited superior thermal stability, especially with increased APP concentration leading to enhanced thermal stability and limiting oxygen index.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Polymer Science
Kexin Chen, Dong Yang, Yongqian Shi, Yuezhan Feng, Libi Fu, Chuan Liu, Ming Chen, Fuqiang Yang
Summary: The design of high-performance compounded flame retardants based on multielement is crucial for reducing the flammability of polymer materials. The introduction of a new N-P-Cu containing supermolecular assembly network (MPCSN) flame retardant into TPU/SiAPP composites significantly improved their thermal and flame retardant performances. The synergistic effect of SiAPP and MPCSN resulted in strong flame suppression and reduced FIGRA and Av-EHC values.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2021)
Article
Agricultural Engineering
Yurou Xia, Weihong Chai, Yuhang Liu, Xinying Su, Chenchen Liao, Meihuan Gao, Yingge Li, Zaihang Zheng
Summary: A starch-based and expandable graphite flame retardant system has been developed to improve the efficiency of bio-based flame retardants in polypropylene. The system exhibits high flame retardancy and anti-dripping ability.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Engineering, Manufacturing
Yansong Liu, Xi Yu, Yingbin Guo, Yuanlin Ren, Xiaohui Liu
Summary: A green and environmentally friendly biomass intumescent flame retardant and smoke suppressed PAN fibers were developed by blending with PA@SE and VB2. The tensile strength and elongation at break of PAN-10%PA@SE/5%VB2 increased significantly, while the peak heat release rate (PHRR) and total smoke production (TSP) were significantly reduced. Additionally, a flame retardant PAN (PANC) was prepared and showed excellent compatibility with cellulose and PVA, greatly improving fire safety for these polymers.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Engineering, Chemical
Jingjing Mu, Ru Zhou, Chang Liu, Teng Su
Summary: A series of novel intumescent flame retardants (IFR) based on melamine, neopentyl glycol, and aluminum diethylphosphinate were prepared and tested in LLDPE composites, showing improved flame retardancy properties. The addition of IFR/ZB led to an increased LOI value of 27%, achieving a V-0 rating in UL-94 tests. Thermogravimetric analysis showed that the char residue amount increased, reducing the pyrolysis rate and fire hazard of the composites.
POLYMER ENGINEERING AND SCIENCE
(2021)
Article
Materials Science, Composites
Fatih Demiryuguran, Nazim Usta
Summary: In this study, fly ash was used as an additive to improve the effectiveness of an intumescent flame retardant system in high density polyethylene. The results showed that fly ash addition increased residual mass and thermal conductivity coefficient, and met higher fire resistance standards. In addition, the addition of flame retardant and fly ash reduced heat release rates and emissions.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2023)
Article
Polymer Science
Xin Li, Dong Liang, Zhiyong Hu, Jilai He, Xiangcheng Bian, Jianlan Cui
Summary: A polyoxometalate-based ionic liquid-doped sepiolite was successfully prepared and applied in constructing a new intumescent flame-retardant system for enhancing the flame retardancy of high-density polyethylene. The addition of SEP-PIL into HDPE/IFR composites significantly improved the flame retardant properties, resulting in the composite achieving a UL-94V-0 rating.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2021)
Article
Construction & Building Technology
Wenqing Yang, Wanyi Zhang, Dong Xie, Yi Wang, Xiaoyan Sun, Ru Zhou, Juncheng Jiang
Summary: A novel composite based on DICY and AHP was integrated into PE, showing improved flame retardant properties compared to pure PE. The UL-94 flame retardant grade reached V-0 and the LOI index increased from 18.8% to 26.3% when the ratio of AHP and DICY was 4:1. The carbon residue and heat release rate were also improved in the composite.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Mechanics
Junlei Chen, Jihui Wang, Xiaoyang Li, Liangliang Sun, Shuxin Li, Anxin Ding
COMPOSITE STRUCTURES
(2020)
Review
Mechanics
Xiaoyang Li, Jihui Wang, Shuxin Li, Anxin Ding
COMPOSITE STRUCTURES
(2020)
Article
Mechanics
Anxin Ding, Shirui Fang, Xu Li, Liangliang Sun, Jihui Wang, Hongda Chen
Summary: Experimental tool-part interaction was conducted with FBG sensors adhesively bonded to the thin tool, quantifying interfacial properties parameters theoretically. The results showed that sliding friction dominates after a critical value of interfacial shear stress is reached at a certain time in the cool-down stage.
COMPOSITE STRUCTURES
(2022)
Review
Engineering, Multidisciplinary
Hongda Chen, Shuxin Li, Jihui Wang, Anxin Ding
Summary: This focused review highlights the key features and corresponding simulation methods of the global and local processes in the development of thermo-stamping, aiming to identify gaps in current research and challenges to achieve practical engineering applications.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Geochemistry & Geophysics
Anxin Ding, Shunlin Liang, Ziti Jiao, Han Ma, Alexander A. Kokhanovsky, Jouni Peltoniemi
Summary: This study proposes an improved model, ARTF, by multiplying by a correction term in the asymptotic radiative transfer (ART) model to enhance the accuracy in characterizing snow bidirectional reflectance. Compared to the ART and ARTS models, the ARTF model exhibits higher accuracy and is more effective in representing snow hyperspectral reflectance.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Geochemistry & Geophysics
Yaxuan Chang, Ziti Jiao, Xiaoning Zhang, Linlu Mei, Yadong Dong, Siyang Yin, Lei Cui, Anxin Ding, Jing Guo, Rui Xie, Zidong Zhu, Sijie Li
Summary: This study assessed a series of hotspot-corrected Ross-Li models in fitting POLDER data sets and estimating albedo, especially at large solar zenith angles. The results indicate that BRDF models with appropriately selected kernels are likely to retrieve albedo more accurately at large SZAs, providing guidance for selecting suitable combinations of multiple kernels.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2021)
Article
Geochemistry & Geophysics
Yichuan Ma, Tao He, Shunlin Liang, Jianguang Wen, Jean-Philippe Gastellu-Etchegorry, Jiang Chen, Anxin Ding, Siqi Feng
Summary: Surface albedo estimation is challenging in rugged terrains, but this study successfully retrieved albedo on sloping terrain using satellite data and artificial neural networks. The accuracy of the method was verified and different albedo results were evaluated, advancing our understanding of energy budget in mountains.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Environmental Sciences
Anxin Ding, Han Ma, Shunlin Liang, Tao He
Summary: The study developed a tangible parametric model of soil hyperspectral bidirectional reflectance by evaluating and extending the Hapke model. The Hapke-HSR model effectively captured the characteristics of soil hyperspectral reflectance and showed high prediction accuracy.
REMOTE SENSING OF ENVIRONMENT
(2022)
Article
Engineering, Civil
Junlei Chen, Jihui Wang, Shuxin Li, Changzeng Wang, Anxin Ding
Summary: This study proposes analytical solutions for predicting spring-in angles of U-shaped composite parts, which can quantitatively analyze the correlation between spring-in angles of different parts of the parts and material properties and geometric parameters, and its reliability is verified by comparing theoretical calculations and experimental measurements.
THIN-WALLED STRUCTURES
(2021)
Article
Materials Science, Ceramics
Yunfa Si, Huihui Jin, Qiong Zhang, Dewen Xu, Renxin Xu, Anxin Ding, Dan Liu
Summary: Large-area, high-performance, and compact nacre-like MXene-based composite films have been engineered through cooperative co-assembly of Ti3C2TX MXene, reduced graphene oxide (rGO), and polyvinyl alcohol (PVA). These composite films exhibit high strength, toughness, conductivity, and electromagnetic interference (EMI) shielding effectiveness, while maintaining stable performance in harsh environments.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Composites
Mi Xu, Rui Zhou, Aiqing Ni, Anxin Ding
Summary: A simple methodology for predicting the spring-in of curved composite parts is proposed in this paper, which only requires inputting the properties of constituent materials in rubbery and glassy states. The methodology includes the homogenization of lamina and laminate properties as well as the improved analytical calculation of spring-in for C-section and L-section composite parts. The results show that the methodology can accurately predict the properties and spring-in angles of composite parts.
COMPOSITES COMMUNICATIONS
(2022)
Article
Polymer Science
Weiping He, Xu Li, Piao Li, Shirui Fang, Anxin Ding
Summary: This study examines the hygroscopic behavior of vinylester resin and high strength glass fiber reinforced vinylester resin composites. The results show that the embedment of glass fiber effectively inhibits the moisture absorption and hydrolysis of the resin matrix. The mechanical properties test reveals a decrease in tensile and compressive strength with increasing immersion time.
Article
Materials Science, Multidisciplinary
Fan Yang, Jihui Wang, Changzeng Wang, Junlei Chen, Anxin Ding
Summary: This study successfully synthesized a high-efficiency flame retardant HOMP with heterocyclic groups by removing the obstacle of insoluble triazines, and fully characterized its structure, thermal and flame retardant properties. The mechanism and effects on mechanical properties were also investigated. The results showed that HOMP effectively extinguished the combustion of specimens, achieving an LOI value of 29.2% and V0 level in the UL-94 test with only 0.6wt% phosphorus content. However, the addition of HOMP increased the compressibility while significantly decreasing the tensile strength.
MULTIDISCIPLINE MODELING IN MATERIALS AND STRUCTURES
(2023)
Article
Environmental Sciences
Anxin Ding, Ziti Jiao, Xiaoning Zhang, Yadong Dong, Alexander A. Kokhanovsky, Jing Guo, Hailan Jiang
Summary: In this study, a practical approach using POLDER observations and random forest algorithm was proposed to improve the MCD43A products. The results showed that the proposed method performed well in correcting BRDF parameters and retrieving snow albedo, and it had higher accuracy compared to the MODIS albedo product.
JOURNAL OF REMOTE SENSING
(2023)
Article
Mechanics
Rawan Aqel, Patrick Severson, Rani Elhajjar
Summary: A novel core splice joint configuration for composite sandwich structures is studied and proposed to improve the strength and toughness. Experimental and numerical efforts show that this configuration can significantly increase the ultimate strength by 13% to 51% and the toughness by 2% to 35%.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xianheng Wang, Cong Chen, Jinsong Zhang, Xinming Qiu
Summary: In this paper, a new form-finding method based on spatial elastica model (FMSE) is proposed for elastic gridshells. The method integrates the deformations of elastic rods into the overall deformation of the gridshell, and solves a set of transcendental equations using the quasi-Newton method to ensure the deformation satisfies the given boundary conditions. The method is validated through experiments and expected to have potential applications in the investigations of elastic gridshells.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Hao Huang, Zitong Guo, Zhongde Shan, Zheng Sun, Jianhua Liu, Dong Wang, Wang Wang, Jiale Liu, Chenchen Tan
Summary: The conventional evaluation of 3D braided composites' mechanical properties through numerical and experimental methodologies hinders material application due to the expenses, time constraints, and laborious efforts involved. This study establishes a multi-scale finite element model and a surrogate model for predicting the elastic properties of 3D4D rotary braided composites with voids. By optimizing a neural network model, the results are validated and provide valuable insights into the microstructure and properties of these composites.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xinyu Li, Hao Zhang, Haiyang Yang, Junrong Luo, Zhongmin Xiao, Hongshuai Lei
Summary: Due to their excellent mechanical properties and design flexibility, fluted-core composite sandwich structures have gained significant attention in aerospace and rail transit applications. This study investigated the free-vibration characteristics and optimized design of composite fluted-core sandwich cylinders through theoretical models and experimental tests.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Chao Li, Chunzheng Duan, Xiaodong Tian, Chao Wang
Summary: A mechanistic model considering the bottom edge cutting effect and the anisotropic characteristics of the material is proposed in this paper to accurately predict cutting forces. The model was validated through a series of milling experiments and can be used to predict the cutting force of various parts of the cutter and any feed direction.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Camila Sanches Schimidt, Leopoldo Pisanelli Rodrigues de Oliveira, Carlos De Marqui Jr
Summary: This work investigates the vibro-acoustic performance of graded piezoelectric metamaterial plates. The study shows that piezoelectric metamaterial plates with reconfigurable properties can provide enhanced vibration and sound power attenuation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jun Ke, Li-jie Liu, Zhen-yu Wu, Zhong-ping Le, Luo Bao, Dong-wei Luo
Summary: Compared with other green natural fibers, ramie has higher mechanical properties and lower cost. In this study, ramie and glass fiber are made into composite circular tubes. The results show that the hybrid circular tube with ramie and glass fiber has improved torsional mechanical properties and reduced weight and cost. The failure mechanisms are affected by the loading direction and the content of each fiber.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Natalia Pingaro, Gabriele Milani
Summary: This paper proposes an enhanced analytical model for predicting the behavior of FRCM samples tested under standard tensile tests. The model takes into account the interaction between fibers and matrix through the interface, and assumes different material properties at different phases. By solving a second order linear differential equation, an analytical solution can be obtained. The model is validated with experimental data and shows good predictability.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jialiang Fan, Anastasios P. Vassilopoulos, Veronique Michaud
Summary: This article investigates the effects of voids, joint geometry, and test conditions on the fracture performance of thick adhesive Double Cantilever Beam (DCB) joints. It concludes that grooved DCB joints with low void content tested at low displacement rates showed stable crack propagation without significant crack path deviation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Auwalu I. Mohammed, Kaarthikeyan Raghupathy, Osvaldo De Victoria Garcia Baltazar, Lawson Onokpasah, Roger Carvalho, Anders Mogensen, Farzaneh Hassani, James Njuguna
Summary: This study investigates the performance of composite pressure vessels under damaged and undamaged conditions, providing insights into their reliability and residual strength capabilities. The results demonstrate that the damage profile and its effect on compressive strength are similar between damaged and non-damaged cylinders. When subjected to quasi-static compression, the polyethylene liner absorbs enough elastic strain energy to recover without plastic deformation. Additionally, quasi-static compression has little to no influence on the axial strength of the cylinders. The damage characterization reveals fiber breakage, delamination, local buckling, and brooming failure. This study has direct implications for the safety design tolerances, manufacturing strategies, and operational failure conditions of composite overwrapped pressure vessels (COPVs).
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Muhammad Irfan Shirazi, Samir Khatir, Djilali Boutchicha, Magd Abdel Wahab
Summary: Structural health monitoring is important to ensure the safety of components and structures. This study proposes a method using finite element models and 1D-CNN network to extract and classify vibration responses for crack detection. The results show that the proposed approach is effective in real-time damage detection.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Maryam Mirsalehi, Kiarash Kianpour, Sharif Shahbeyk, Mohammad Bakhshi
Summary: This study comprehensively investigates the one-way response of 3D-woven sandwich panels (3DWSPs) and their interfering parameters, providing interpretation of elastic and failure results, failure maps, and reliable theoretical models for linear elastic response and observed failure mechanisms.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Yiming Zhao, Zhonggang Wang, Zhigang Yang, Bin Qin
Summary: The paper proposes a Ritz and statistical energy analysis (Ritz SEA) hybrid method for calculating rectangular plate acoustic vibration coupling in the mid-frequency range. This method combines the fast convergence and ability to handle arbitrary boundary conditions of the Ritz method with the power flow equation of the statistical energy analysis method. The results show that this approach effectively filters out random fluctuations in mid-frequency domains while demonstrating exceptional stability and precision.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Joao Henrique Fonseca, Woojung Jang, Dosuck Han, Naksoo Kim, Hyungyil Lee
Summary: This study addresses the enhancement of an injection-molded fiber-reinforced plastic / metal hybrid automotive structure and its plastic injection molding process through the integration of the finite element method, artificial intelligence, and evolutionary search methods. Experimental validation of finite element models, the generation of a database through orthogonal array and Latin hypercube methods, and the training of artificial neural networks are conducted. The genetic optimization algorithm is then applied to identify optimal process parameters. The results show significant reduction in product warpage and manufacturing time while maintaining structural strength, contributing to the advancement of composite automotive structures with superior quality.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Alessandro Vescovini, Carina Xiaochen Li, Javier Paz Mendez, Bo Cheng Jin, Andrea Manes, Chiara Bisagni
Summary: This paper presents a study on six single-stringer specimens manufactured using the card-sliding technique with non-crimp fabrics and adopting a Double-Double (DD) stacking sequence. The specimens were tested under compression loading conditions to investigate post-buckling and failure in aerospace structures. Experimental results and numerical simulations were compared to analyze the behavior and failure modes of the specimens. The study found promising evidence of a viable solution to optimize aeronautical structures and enhance resistance to skin-stringer separation, particularly with the use of tapered flanges.
COMPOSITE STRUCTURES
(2024)
