Article
Materials Science, Ceramics
Lei Su, Min Niu, Mingzhu Li, De Lu, Pengfei Guo, Lei Zhuang, Kang Peng, Hongjie Wang
Summary: Ceramic aerogels have attractive properties for applications in various fields due to their high porosity, low density, high specific surface area, low thermal conductivity, and thermal stability. However, the brittleness of conventional ceramic aerogels hinders their practical use. Resilient ceramic aerogels have overcome the brittleness issue but still exhibit brittleness under tensile stress and limited load-bearing ability. In this short review paper, strategies for modifying the mechanical properties of resilient ceramic aerogels are discussed, including the deformation and moving ability of nanowire building blocks and the deformation resistance provided by the aerogel architecture. Perspectives for further modification are also explored.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Composites
Pei Yang, Subrata Ghosh, Tian Xia, Jiacheng Wang, Mark A. Bissett, Ian A. Kinloch, Suelen Barg
Summary: Polymer composites are considered as a potential alternative for Joule heating materials, with the construction of a continuous conductive network of fillers remaining a challenge. A three-dimensional graphene-based aerogel infiltrated with epoxy demonstrated excellent Joule heating performance, showcasing high electrical and thermal conductivity along the parallel direction to the lamellar structure growth. The induced steady-state temperature was found to have a linear relationship with the electrical and thermal conductivities of the materials, indicating potential for thermal management applications.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Review
Polymer Science
Daniyar Syrlybayev, Beibit Zharylkassyn, Aidana Seisekulova, Mustakhim Akhmetov, Asma Perveen, Didier Talamona
Summary: Additive Manufacturing, particularly Fused Deposition Modeling (FDM), is rapidly growing with a focus on improving part strength and dimensional accuracy. While manipulating process parameters significantly impacts quality and mechanical properties, achieving the ideal parameter combination remains challenging. New research trends such as pre-processing of printed parts and vacuum-assisted FDM show promising improvements in part quality and mechanical properties.
Article
Engineering, Mechanical
Hasan Ismail Yavuz, Busra Eyri, Ridvan Yamanoglu, Erol Feyzullahoglu
Summary: This study investigated the tribological properties and other mechanical, physical, and microstructural properties of bearing materials. The results showed that the Cr alloy had the highest hardness, the Ni alloy had the lowest friction coefficient, and the alloy with Al additives had the highest friction coefficient. The alloy with Cr had the lowest wear rate, while the alloy with Al additives had the highest wear rate.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Neeraj Kumar, Ashutosh Sharma, M. K. Manoj, Byungmin Ahn
Summary: This study prepared self-lubricating aluminum matrix composites using powder metallurgy technique and evaluated their wear, coefficient of friction, and corrosion resistance under different conditions. The results demonstrated that the addition of MoS2 reduced wear and coefficient of friction while improving corrosion resistance. The effects of load and reinforcement concentration were more significant.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Fuxing Zhao, Jundong Zhu, Tangping Peng, Hao Liu, Shengzhuo Ge, Huasheng Xie, Le Xie, Chongwen Jiang
Summary: The novel polyimide composite aerogel synthesized using functionalized clay halloysite nanotubes showed excellent thermal stability, low density, and high mechanical property, making it a promising thermal management material for practical and complex insulation applications.
APPLIED CLAY SCIENCE
(2021)
Article
Chemistry, Physical
Justyna Ciemnicka, Karol Pralat, Artur Koper, Grzegorz Makomaski, Lukasz Majewski, Karolina Wojcicka, Katarzyna Ewa Buczkowska
Summary: The paper assesses the impact of additives on the strength of building gypsum, revealing that the additives significantly influenced its compressive and bending strength. Despite the decrease in strength, the modified gypsum materials remain environmentally friendly due to the reuse of wastes such as microspheres.
Article
Materials Science, Multidisciplinary
Praveenkumar Babu, Darius Gnanaraj Solomon, T. Ram Prabhu
Summary: Magnesium metal matrix composites, especially AZ31+(0.5 to 2 wt%) La2O3 composites, are used for wear-resistance applications. The addition of La2O3 increases the density and hardness of the composites, while maintaining a homogeneous distribution of elements. The AZ31 + 1.5 wt% La2O3 composite exhibits the lowest friction coefficient and wear rate, with a smoother worn surface compared to other composites.
Article
Polymer Science
Jihong Huang, Jingyang Gao, Liang Qi, Qunyu Gao, Ling Fan
Summary: In this study, aerogels were prepared using cellulose and starch as primary materials, with the addition of N,N'-methylenebisacrylamide (MBA) as a cross-linking agent. The proportions of cellulose, starch, and MBA significantly influenced the chemical, morphological, and textural characteristics of the aerogels. The study found that increasing the proportion of cellulose resulted in stronger adsorption forces and larger pores within the aerogel structure. When the mass fractions of starch and cellulose were 5 wt% and 1 wt% respectively, the aerogels exhibited the smallest pore size and largest porosity. The addition of 3 wt% of MBA resulted in the best internal structure of the aerogel. The study also showed that MBA improved the water absorption, expansion characteristics, and dye adsorption properties of the aerogel. Furthermore, the aerogels demonstrated a higher capacity for incorporating vitamin E compared to native starch.
Article
Materials Science, Composites
Pasa Yaman, Olcay Eksi, Sencer Suereyya Karabeyoglu, Kamil Feratoglu
Summary: In this study, FDM-printed specimens were made using polylactic acid filaments filled with copper, brass, bronze, tungsten, and carbon fiber. The results showed that on-edge oriented specimens had higher flexural strength, while flat orientation contributed to wear resistance. Abrasive wear was observed in the dry sliding condition, while adhesive, fatigue, and abrasive wear were observed in the wet sliding condition. The brass-filled specimens showed the highest flexural strength and flexural modulus, while tungsten was determined to be the most wear resistant filler.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2023)
Review
Engineering, Manufacturing
Ramkumar Yadav, Mayank Singh, Deepika Shekhawat, Seul-Yi Lee, Soo-Jin Park
Summary: This review paper examines the impact of reinforcements on various polymer composite characterizations and finds that fillers play a significant role in enhancing the properties of polymer composites.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Materials Science, Composites
Alper A. Cerit, Fehmi Nair, Hafiz M. N. Zafar, M. B. Karamis
Summary: This study compares the wear behavior of camshaft cams made from ceramic-reinforced MMC with unreinforced AA2124 and cast iron cams. It is found that increasing ceramic particle content and size leads to degraded wear resistance under wet conditions.
JOURNAL OF COMPOSITE MATERIALS
(2023)
Article
Construction & Building Technology
Syed Nasir Shah, Kim Hung Mo, Soon Poh Yap, Mohammed K. H. Radwan
Summary: This study assessed the influence of micro-sized silica aerogel fines on the properties of cement composite, finding that the addition of SA reduced consistency and slump, increased porosity, and resulted in decreased density, compressive strength, wettability, and softening coefficient in the LCC.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Chemical
Shuhua Liu, Peipei Fang, Hongling Wang, Yaning Kong, Liao Ouyang
Summary: By substituting local tuff for fly ash powder, costs for constructing RCC clams in Tibet can be reduced, while tuff powder shows good mineral admixture effects and the ability to improve early compressive strength.
Article
Materials Science, Ceramics
Huijiao Jia, Shan Liu, Zhiyong Mao, Dajian Wang
Summary: In this research, hierarchical structural composites were prepared by combining Al2O3-SiO2 aerogel with alumina frameworks. The introduction of Al2O3-SiO2 aerogel led to an increase in specific surface area and compression strength of the composite material. The proposed composite material exhibited a hierarchical porous structure and properties suitable for catalyst supporting applications at high reaction temperatures.
CERAMICS INTERNATIONAL
(2021)
Article
Polymer Science
Andrzej Komorek, Pawel Przybylek, Robert Szczepaniak, Jan Godzimirski, Marek Roskowicz, Szymon Imilowski
Summary: Composite materials, especially sandwich composites, are widely used in the construction of means of transport due to their low density and high stiffness. This study conducted static and dynamic tests to investigate the effect of density and core thickness on the mechanical properties of sandwich composites. The results showed that the core material significantly influenced the strength parameters of the composites, and different polymer foam cores had different adhesive properties. Thicker cores with higher density were found to improve the impact strength and puncture resistance of the sandwich composites.
Article
Engineering, Multidisciplinary
Aneta Krzyzak, Szymon Relich, Ewelina Kosicka, Robert Szczepaniak, Mateusz Mucha
Summary: The study found that the addition of alumina resulted in a decrease in the strength of polymer composites, while also impeding the oversaturation of carbon fabric, leading to discontinuities in the matrix material.
ADVANCES IN SCIENCE AND TECHNOLOGY-RESEARCH JOURNAL
(2022)
Article
Chemistry, Physical
Robert Szczepaniak
Summary: This paper investigates the influence of surface topography on thermal diffusivity measurements using the pulse method. Numerical tests and experimental investigations were conducted to develop a numerical model and determine the effects of surface non-uniformity on the measurement results.
Article
Chemistry, Physical
Janusz Terpilowski, Stanislaw Jozwiak, Grzegorz Woroniak, Robert Szczepaniak
Summary: This article presents the use of modified pulse method (MPM) to determine the temperature characteristics of thermal diffusivity of alloy 718. The experiment was conducted in the temperature range of 20-900 degrees C with double heating of the sample at a two-week interval. The research results showed good correlation between the recommended changes in thermal diffusivity by NPL & ASM and data from the MPDB database in the temperature range of 300-500 degrees C during the first heating of the sample. However, clear deviations occurred below 300 degrees C and above 700 degrees C, possibly due to the electron component of the alloy's conductivity and the precipitation phenomenon of the delta phase.
Article
Chemistry, Physical
Marta Kadela, Marcin Malek, Mateusz Jackowski, Mateusz Kunikowski, Agnieszka Klimek, Daniel Dudek, Marek Roskowicz
Summary: The increasing waste from the vulcanization industry poses a significant environmental challenge. Reusing the steel in tires as reinforcement in the production of new building materials can help reduce the industry's environmental impact and support sustainable development.
Article
Chemistry, Physical
Jan Godzimirski, Marek Roskowicz, Michal Jasztal, Iga Barca
Summary: The purpose of this study was to analyze the impact of different mechanical fastener types on the static strength and failure mechanism of lap joints in composite elements, as well as the effect of supplementing these joints with adhesive joints under fatigue load. Computed tomography technology was used to observe damage in the composite joints. The study found that partial damage to the hybrid joint does not increase the load on the fasteners or impair the joint's fatigue life, and the two-stage destruction of the hybrid joint enhances the safety of aircraft structures.
Article
Polymer Science
Andrzej Komorek, Robert Szczepaniak, Pawel Przybylek, Kacper Komorek, Zenon Komorek, Jan Godzimirski, Andrzej Zbrowski
Summary: The research modified the basic adhesive composition to estimate the effect of fatigue loading on the temperature of the adhesive material. The temperature of the materials was recorded using a thermal imaging camera and a thermoelectric thermometer. An increase in the number of load cycles corresponded to an increase in the temperature of most tested materials at 20 Hz, while a decrease in temperature was observed for modified samples at a frequency of 30 Hz after a certain value. Fatigue loading caused an increase in the temperature of all tested polymeric materials. The use of a thermal imaging camera allowed for simple identification of areas with the highest temperature during testing, providing more practical use compared to thermocouple thermometers.
Article
Engineering, Multidisciplinary
Aneta Krzyzak, Damian Racinowski, Robert Szczepaniak, Ewelina Kosicka
Summary: This article discusses the friction performance of carbon fiber reinforced epoxy composites under different environmental conditions. The results show that the wear resistance of the composites is improved after a two-month exposure to environmental effects, but there is also a risk of damage under certain conditions. Therefore, safe usage and limitations are needed under specific conditions.
EKSPLOATACJA I NIEZAWODNOSC-MAINTENANCE AND RELIABILITY
(2023)
Article
Thermodynamics
Andrzej J. Panas, Robert Szczepaniak, Wit Stryczniewicz, Lukasz Omen
Summary: This paper examines the problem of the thermophysical properties of pressure-sensitive paint (PSP), introducing a non-standard test procedure to obtain reliable data. The results indicate that PSP can be classified as an insulator.
THERMOCHIMICA ACTA
(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)
