Article
Materials Science, Ceramics
E. Acar, M. Aydin
Summary: The study revealed that FGMs exhibited higher storage moduli and damping capacities compared to MMCs. Damping capacity decreased as the vibrating frequency increased, while storage moduli were more sensitive to frequency change at higher temperatures.
JOURNAL OF ASIAN CERAMIC SOCIETIES
(2021)
Article
Materials Science, Composites
Kabbala Basavarajappa Bommegowda, Nijagal Marulaiah Renukappa, Jagannathan Sundara Rajan
Summary: The study investigates the impact of different fillers on the dynamic-mechanical properties of epoxy composites, with silicon carbide filler exhibiting the highest storage modulus and composite with 5 wt% alumina showing the maximum loss modulus. The storage modulus only shows marginal differences between nanofillers and micron filler-based composites, but is higher by about 10-15% compared to micron fillers.
POLYMER COMPOSITES
(2021)
Article
Materials Science, Multidisciplinary
Gaofeng Zhou, Hongjie Jiang, Chongyu Liu, Hongfeng Huang, Lili Wei, Zhengbing Meng
Summary: The AlSi30p/5052Al composite with a porous particle layer was produced successfully by hot rolling, showing higher internal friction and storage modulus than the matrix. The presence of an intermediate particle layer increases dislocation and residual internal stress, improving the storage modulus of the composites. The comprehensive damping index of the composites is better, attributed to the synergistic damping effect caused by the porous structure and a large number of interfaces between particles in the particle layer.
Article
Materials Science, Ceramics
Ali Yazdani, Habib Danesh Manesh, Seyed Mojtaba Zebarjad
Summary: This study investigated the production of thermoplastic polyurethane elastomer (TPU) composites containing varying amounts of lead zirconate titanate (PZT) ferroelectric particles using a solution casting process. The effect of damping treatment on composites with high filler content was examined. The results showed that PZT particles were properly distributed in the PU matrix and that increasing PZT filler content resulted in a decrease in melting enthalpy. Furthermore, the dynamic mechanical thermal analysis (DMTA) revealed that the magnitude of the loss factor strongly depended on PZT content, with a decrease from 0.51 to 0.27 as PZT content increased.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Chemical
Venkatesh Chenrayan, Gangadhar Kanaginahal, Kiran Shahapurkar, Manzoore Elahi M. Soudagar, Yasser Fouad, M. A. Kalam
Summary: This study investigates the potential use of Caesalpinia decapetala (CD) as a reinforcement in epoxy matrix and its thermal stability. The results show that the addition of CD seed particles enhances the dynamic mechanical characteristics of the epoxy composite. The storage modulus, loss modulus, and damping are significantly improved with higher CD seed content.
POLYMER ENGINEERING AND SCIENCE
(2023)
Article
Polymer Science
N. Rasana, K. Jayanarayanan, Alessandro Pegoretti, G. Rammanoj, K. Arunkumar, T. Hariprasanth
Summary: This study investigates the morphology, mechanical, viscoelastic, and transport properties of ABS nanocomposites reinforced with nanosilica and multiwalled carbon nanotubes. Results show that MWCNTs at 5% content exhibit the highest tensile strength and Young's modulus, while the morphology and mechanical properties of NS composites are influenced by dispersion and stress transfer.
Article
Materials Science, Characterization & Testing
Syam Prasad Ammineni, Ch. Nagaraju, D. Linga Raju
Summary: This study focuses on estimating the degradation and reduced damping ability of NBR over time in an oxidative environment. Changes in the NBR material were detected using FTIR and compared to the original material through DMA tests. The experimental results indicate that the damping ability of NBR decreases with age.
Article
Chemistry, Multidisciplinary
Jiaqi Zheng, Shuang Sun, Xu Hu, Zhaohan Yu, Yue Fu, Dan Chen, Dong Wang, Weihao Cai, Huamin Zhou, Yunming Wang
Summary: High-performance damping materials are crucial in reducing vibration and ensuring stability in industrial applications. This study presents a yolk-shell piezoelectric damping mechanism that enhances mechanical energy dissipation and improves damping capability. By incorporating yolk-shell particles and carbon nanotube conductive network, the damping properties of different resin matrices are enhanced, allowing mechanical energy to be dissipated into electrical and heat energy. The results demonstrate the effectiveness of the yolk-shell piezoelectric damping mechanism, and the novel damping materials also exhibit excellent flexibility, stretchability, and resilience, making them promising for applications such as damping coatings, transportation, and sophisticated electronics.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Engineering, Multidisciplinary
Prabu Krishnasamy, Arvinda Pandian, G. Rajamurugan, T. Jayaraman, Akash Maniyambath, Kesav Chandran
Summary: This review discusses the influence of various factors, such as excitation frequency, temperature, fiber length, etc., on the dynamic behavior of fiber-based polymer composites. It emphasizes the importance of viscoelastic property in these composites and provides a detailed analysis of the factors affecting DMA performance.
ENGINEERING RESEARCH EXPRESS
(2022)
Article
Materials Science, Composites
Dinesh Kumar, Navin Kumar, Prashant Jindal
Summary: MWCNTs-reinforced PU composites were fabricated using solution mixing and compression molding techniques. The study found that the storage modulus of the composites was significantly enhanced at higher frequencies, and even a small amount of MWCNTs could improve the elasticity of the material, attributed to the uniform dispersion of MWCNTs and their adhesion with PU molecules.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xianfeng Chen, Satya K. Ammu, Kunal Masania, Peter G. Steeneken, Farbod Alijani
Summary: This study presents a method for achieving high-quality macroscopic levitating resonators by substantially reducing eddy current damping using graphite particle-based diamagnetic composites. The experimental results demonstrate that these composite resonators can stably levitate in high vacuum at room temperature and have a high-quality factor.
Proceedings Paper
Materials Science, Multidisciplinary
T. Venkategowda, L. H. Manjunatha, P. R. Anilkumar
Summary: This article discusses the use of natural fibers in polymer composites and highlights the importance of dynamic mechanical analysis in studying material properties.
MATERIALS TODAY-PROCEEDINGS
(2022)
Article
Materials Science, Composites
Rashmi Aradhya, J. Sundara Rajan
Summary: The effect of incorporating micron-sized aluminum trihydrate, multi-walled carbon nanotubes, and graphene nano platelets into a glass fiber reinforced epoxy matrix is investigated using dynamic mechanical analysis. The objective was to develop a high temperature low sag transmission conductor with a polymer central core. The study examines the viscoelastic properties of the epoxy composites with individual and hybrid carbon fillers. The addition of carbon nanofillers increases the storage modulus of the glass reinforced epoxy, with higher enhancement in the glass transition and rubbery regions.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Characterization & Testing
C. Rajesh, P. Divia, S. Dinooplal, G. Unnikrishnan, E. Purushothaman
Summary: The study investigates the dynamic mechanical properties of composites of short nylon 6 fiber with acrylonitrile butadiene rubber (NBR), analyzing the effects of fiber loading, curing systems, and bonding agents on the storage modulus, loss modulus, and damping factor. Results show that storage modulus increases with fiber loading, while loss modulus and damping factor decrease. The glass transition temperature shifts to higher temperature with increment in fiber loading. Dicumyl peroxide (DCP)-cured composites exhibit higher storage modulus and lower damping compared to sulfur-cured ones, and the addition of hexa-resorcinol and phthalic anhydride as bonding agents enhances the dynamic mechanical properties of the composites.
POLYMERS & POLYMER COMPOSITES
(2021)
Article
Construction & Building Technology
Qi Li, Weihua Jin, Abhishek Shetty, Nikhil Gupta
Summary: Dynamic mechanical analysis (DMA) applies oscillating force to a specimen to analyze its rheological and viscoelastic properties. It is mainly used for polymers due to their high sensitivity to loading frequency. Cementitious composites, being brittle, require special attention to specimen preparation and experimental settings for reliable results. This study develops a DMA test protocol for cementitious composites and proposes statistical analysis methods to obtain valid test results.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
