Article
Chemistry, Physical
Joanna Pach, Ewa Kuterek
Summary: This study presents experimental results of quasi-static penetration tests on laminates reinforced with aramid and carbon fibers in hybrid and non-hybrid configurations. The study investigates the impact of fiber combinations and support span to punch diameter ratios on laminate properties and damage mechanisms.
Article
Materials Science, Composites
Mehmet Emin Cetin, Yusuf Bastosun, Ahmet Caner Tatar, M. Huseyin Cetin, Okan Demir, Gurol Onal, Ahmet Avci
Summary: In this study, carbon-aramid fiber reinforced hybrid composites were fabricated using halloysite nanotubes (HNTs) modified epoxy matrix, and the tribological effects of HNTs on the hybrid composites were analyzed through wear tests. The results indicated that the addition of HNTs reduced the friction coefficient, decreased the wear rate, improved thermal conductivity, and enhanced the overall tribological performance of the nanocomposites.
POLYMER COMPOSITES
(2022)
Article
Materials Science, Composites
Nahit Oztoprak, Okan Ozdemir, Halis Kandas
Summary: This study investigates the mechanical characterization of thermoplastic composites with additional fiber hybridization, specifically focusing on hybridization of long glass fiber-reinforced polypropylene composite with aramid and carbon fabrics. Results show that the hybrid configuration with aramid fabric reinforcements exhibits approximately 15.5% higher maximum penetration force at 60 degrees Celsius test temperature.
JOURNAL OF COMPOSITE MATERIALS
(2022)
Article
Mechanics
Sajid Abdullah Alam, Chee Kuang Kok, Saijod Tze Way Lau, Abdul Rahman Adenan, Md. Injamum Ul Haque, Sivakumar Dhar Malingam, Purwo Kadarno, Gooi Mee Chen
Summary: The failure modes and energy absorption of square and round carbon/aramid multiple-segment tubes under quasi-static axial crushing were studied. Cavity-shaped initiators were used to trigger inward crushing. The results showed that round tubes outperformed square tubes for the same material lay-up. The deformation modes of the tube were significantly influenced by the ability of the tube bottom segment to first crush symmetrically within the initiator. Among the tubes used in this study, those with graded stiffness crushed more uniformly within the initiator before folding progressively upward, exhibiting high energy absorption.
COMPOSITE STRUCTURES
(2023)
Article
Chemistry, Physical
S. P. Wang, C. Y. Li, J. L. Li, H. B. Wang, Y. Li, S. Z. Kou
Summary: The mechanical properties of the (ZrCuNiAl)Tm3 bulk amorphous alloy at cryogenic temperature are significantly dependent on temperature and strain rate, with strain rate softening phenomenon observed under dynamic loading. The compressive strength of the alloy increases significantly with the decrease of temperature under dynamic loading, attributed to the strong interatomic binding force between the alloy elements.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Mechanical
N. Rogkas, L. Vasilopoulos, V. Spitas
Summary: This work presents a comprehensive formulation of the equations governing the lubrication and the lock-up phases of an engaging wet clutch. A finite element model is established through the coupling of the Reynolds equation of the fluid film model with the dynamic force and torque equilibrium equations of the two-disc system. An efficient hybrid simulation technique is introduced to solve the problem and capture the rapidly evolving transient phenomena at the start of the engagement phase, which later settles into a quasi-static one.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Polymer Science
Sudhir Kumar Mishra, Dharmendra Kumar Shukla, Rabindra Kumar Patel
Summary: Alumina nanoparticles of two shapes (spherical and rod) were dispersed in epoxy resin using sonication technique to synthesize functionally graded polymer nanocomposites (FGPNC). The weight percentage of nanoparticles was varied in the thickness direction to achieve gradation in samples. The results showed that FGPNC samples with nanoparticles exhibited higher fracture toughness in different crack orientations.
Article
Mechanics
Ping Cheng, Yong Peng, Kui Wang, Antoine Le Duigou, Song Yao, Chao Chen
Summary: This study aimed to investigate the penetration behaviors of 3D printed biocomposites with continuous ramie yarn reinforcement. The results showed that the penetration property and energy absorption capability of the samples increased with decreasing support span to indenter diameter ratios (SIR) and with the addition of continuous ramie yarn. The structure-penetration property relationship of the 3D printed woven-like architectured biocomposite was revealed through the analysis of multiscale failure features and penetration damage mechanisms.
COMPOSITE STRUCTURES
(2023)
Article
Chemistry, Physical
Yeou-Fong Li, Hsin-Fu Wang, Jin-Yuan Syu, Gobinathan Kadagathur Ramanathan, Ying-Kuan Tsai, Man Hoi Lok
Summary: By incorporating aramid fiber and carbon fiber into concrete in a hybrid manner, this study aimed to enhance the static and impact mechanical properties of the material. The test results showed that the presence of a coupling agent on carbon fibers affected the mechanical strength of the reinforced concrete, with a 50-50% mix proportion of Kevlar/carbon fiber significantly improving compressive, flexural, and splitting tensile strengths. Additionally, the hybrid fiber-reinforced concrete exhibited better performance in mechanical strength and impact resistance compared to concrete with only Kevlar or carbon fibers.
Article
Engineering, Chemical
Bo Zhang, Tianze Lian, Xiaoming Shao, Ming Tian, Nanying Ning, Liqun Zhang, Wencai Wang
Summary: This study presented a novel approach to enhance the interfacial adhesion between fibers and rubber by constructing nanostructures on the surface of aramid fibers. The introduction of functional groups and the formation of 3D nanostructures improved the mechanical interlocking and stress transfer, leading to significant enhancement in pull-out force and interfacial adhesion. The interaction between graphene and aramid nanofibers played a crucial role in achieving excellent mechanical properties while maintaining the fiber's performance.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Mechanics
Farzad Ebrahimi, Ali Dabbagh, Abbas Rastgoo
Summary: This paper investigates the buckling problem of a multi-scale hybrid nanocomposite shell for the first time while the cylinder is supposed to be rested on an elastic substrate. The effects of nanofillers' agglomeration and the equivalent material properties of the carbon nanotube-reinforced (CNTR) nanocomposite are studied. The results provide insights into the failure behavior and propose strategies to enhance the buckling resistance of the nanocomposite structure.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Materials Science, Composites
Nurettin Furkan Dogan
Summary: This study investigated the effects of graphene nanoplatelets (GNPs) on the axial and lateral buckling behavior of carbon/aramid hybrid-woven epoxy nanocomposites. The addition of GNPs resulted in enhanced critical buckling loads, with the maximum enhancement observed at 0.1 wt% GNPs. However, further addition of GNPs led to a decrease in critical buckling loads due to agglomeration. Failure surfaces were examined with scanning electron microscopy to understand the relationship between buckling behavior and failure types of the composite samples.
POLYMER COMPOSITES
(2021)
Article
Chemistry, Physical
Hongyuan Zhao, Huina Ma, Xiaoguang Li, Binbin Liu, Runqiang Liu, Sridhar Komarneni
Summary: The electrode sensor prepared with halloysite/multi-walled carbon nanotubes nanocomposite showed excellent performance in detecting methyl parathion, with a low detection limit and good detection effect.
APPLIED CLAY SCIENCE
(2021)
Article
Engineering, Manufacturing
Baxter Barnes, Behzad Bahrami Babamiri, Gabriel Demeneghi, Arash Soltani-Tehrani, Nima Shamsaei, Kavan Hazeli
Summary: This study investigates the relationship between localized stress states and global behavior in hybrid additive manufactured lattice structures (AMLS) under different loading directions and strain rates. The findings indicate that loading direction influences mechanical behavior, with flow stress being lower in the stacking direction. Additionally, the order of topology stacking influences collapse mechanisms, with shear band formation being inhibited by certain topologies.
ADDITIVE MANUFACTURING
(2021)
Article
Multidisciplinary Sciences
Serkan Bati, Yahya Hisman Celik
Summary: This study conducted quasi-static punch shear tests on aramid fiber-reinforced composite laminates with different ratios of graphene nanoplatelets (GNP), carboxyl functionalized multi-walled carbon nanotubes, and their hybrid combinations. The results showed that the ogival punch geometry caused deformation at a higher load and reached the maximum load at a lower displacement compared to the conical punch. Incorporation of nanoparticles increased the energy required for complete penetration. The composite containing 0.2% GNP demonstrated the most significant increase in energy required for complete penetration with the conical punch configuration, while the 0.1% hybrid composite showed a substantial increase under the ogival punch configuration. The increase in support span-to-punch ratio did not significantly affect the energy required for complete penetration due to embrittlement caused by the nanoadditives.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Memduh Kara, Muhammed Kirici, Ahmet Caner Tatar, Ahmet Avci
COMPOSITES PART B-ENGINEERING
(2018)
Article
Materials Science, Multidisciplinary
K. Dincer, B. Waisi, G. Onal, N. Tugluoglu, J. McCutcheon, O. F. Yuksel
Article
Materials Science, Textiles
Okan Demir, Ahmet Caner Tatar, Volkan Eskizeybek, Ahmet Avci
Summary: The study proposed a novel hybrid composite design that successfully reduced the investment cost of offshore wind turbine blades while maintaining bending and impact resistance. Experimental results show that the introduction of multi-walled carbon nanotubes (MWCNTs) can significantly improve the bending and impact strength of the material.
FIBERS AND POLYMERS
(2022)
Article
Materials Science, Composites
Ferhat Yildirim, Ahmet Caner Tatar, Volkan Eskizeybek, Ahmet Avci, Mustafa Aydin
Summary: This study experimentally examined the low-velocity impact performance of 3D woven spacer glass-epoxy composite under cryogenic temperatures, revealing that the composite gradually absorbed higher impact energies at lower temperatures. Nanofiller modification was found to enhance impact resistance, but its efficiency decreased with decreasing temperature.
JOURNAL OF COMPOSITE MATERIALS
(2021)
Article
Engineering, Mechanical
Emine Feyza Sukur, Gurol Onal
Summary: The corrosion behavior and wear performance of basalt/epoxy composites exposed to salt-water were studied experimentally, as well as the impact of graphene nanoplatelet modification of the epoxy matrix on the composite's water absorption and wear performance. The results showed that the modification with GNPs reduced water absorption and coefficient of friction, while causing a smaller decrease in tensile strength and modulus of elasticity after the 6th month.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Materials Science, Composites
Mehmet Emin Cetin, Yusuf Bastosun, Ahmet Caner Tatar, M. Huseyin Cetin, Okan Demir, Gurol Onal, Ahmet Avci
Summary: In this study, carbon-aramid fiber reinforced hybrid composites were fabricated using halloysite nanotubes (HNTs) modified epoxy matrix, and the tribological effects of HNTs on the hybrid composites were analyzed through wear tests. The results indicated that the addition of HNTs reduced the friction coefficient, decreased the wear rate, improved thermal conductivity, and enhanced the overall tribological performance of the nanocomposites.
POLYMER COMPOSITES
(2022)
Article
Multidisciplinary Sciences
Esmael Adem Esleman, Gurol Onal, Mete Kalyoncu
Summary: This paper aims to improve the motion/position control of overhead cranes using a PID controller combined with optimization methods such as Genetic Algorithms and Bee Algorithms, as well as a Fuzzy Logic modified PID controller. The results show that the optimized PID parameters obtained using GA and BA reach the target values, and the fuzzy logic controller outperforms the conventional PID controller in terms of overshoot reduction.
SN APPLIED SCIENCES
(2021)
Article
Materials Science, Composites
Memduh Kara, Ahmet Caner Tatar, Muhammed Kirici, Yusuf Kepir, Alper Gunoz, Ahmet Avci
Summary: This study investigates the low-velocity impact response of boron nitride nanoparticles added carbon fiber reinforced pipes at different temperatures. The results show that the damage areas of carbon fiber reinforced tubes significantly increase in low-temperature environments regardless of the presence of boron nitride nanoparticles.
JOURNAL OF COMPOSITE MATERIALS
(2022)
Article
Engineering, Mechanical
Emine Feyza Sukur, Gurol Onal
Article
Multidisciplinary Sciences
Abdulkerim Mohammed Yibre, Baris Kocer, Esmael Adem Esleman, Gurol Onal
SN APPLIED SCIENCES
(2020)
Article
Nanoscience & Nanotechnology
Ali Serhat Ersoyoglu, Sadik Ata, Kevser Dincer, Gurol Onal, Yusuf Yilmaz
NANO HYBRIDS AND COMPOSITES
(2017)
Article
Nanoscience & Nanotechnology
Gurol Onal, Mehmet Okan Erdal, Kevser Dincer
NANO HYBRIDS AND COMPOSITES
(2017)
Article
Materials Science, Multidisciplinary
Baihong Chen, Changyue Liu, Zengting Xu, Zhijian Wang, Rui Xiao
Summary: In this study, both polydomain and monodomain liquid crystal elastomers (LCEs) were synthesized and their shape change with temperature under a certain stress level was characterized. A thermo-order-mechanical coupling model was developed to predict the shape change of LCEs, showing good consistency with experimental results.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Peng Wang, Fei Xu, Yiding Wang, Jun Song, Cheng Chen
Summary: This study investigates the interplay of super-screw dislocations and coherent twin boundary (CTB) in Ni3Al using molecular dynamics simulations and dislocation continuum theory. Various interaction mechanisms are observed depending on the stress and dislocation gliding pathways. A continuum model framework is developed to evaluate the critical shear stress required for CTB to accommodate dislocations along different pathways, considering the effects of anti-phase boundary (APB) and Complex Stacking Fault (CSF). The study suggests that the resistant force of CTB against all gliding dislocations is a more appropriate metric for quantifying its strength.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Chenyu Du, Haitao Cui, Hongjian Zhang, Zhibin Cai, Weikuo Zhai
Summary: A thermal-elastoplastic phase field model was developed to simulate thermal fatigue crack growth. The accuracy and availability of the model were verified through typical examples. The results indicate that the proposed model effectively simulates the process of thermal fatigue crack propagation in elastoplastic solids. The appropriate regularization length needs to be determined based on experimental results.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
J. Carlsson, A. Kuswoyo, A. Shaikeea, N. A. Fleck
Summary: The sensitivity of the compressive strength of a polymeric Kelvin lattice to the presence of an epoxy core is investigated both experimentally and numerically. The study shows that the epoxy core prevents the formation of crush bands in the lattice and changes its deformation mode. At finite strain, the strength of the lattice is degraded by bending failure and cracking of the struts and adjacent core, leading to the formation of vertical fissures.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Saptarshi Paul, Anurag Gupta
Summary: In this study, we investigate the geometry and mechanics of the buckled orthotropic von Karman elastic plate with free boundary condition, in the presence of an isolated positive or negative disclination. The shape of the buckled plate is cone-like for a positive disclination and saddle-like for a negative disclination. With increasing orthotropy, the shape of the buckled plate becomes more tent-like and the Gaussian curvature spreads along the ridge of the tent. The stress fields are focused in the neighborhood of the defect point and the ridge, indicating that most of the stretching energy is accommodated in these singular regions.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Antu Acharya, Vikram Muthkani, Anirvan DasGupta, Atul Jain
Summary: This study proposes filler-based and infill-based strategies for creating auxetic lattices with enhanced stiffness. The elastic properties of the sinusoidal re-entrant honeycomb lattice are developed and validated using finite element models. Parametric studies are conducted to find combinations leading to enhanced stiffness with minor loss in auxeticity. The results demonstrate the possibility of achieving a significant increment in stiffness while retaining significant auxeticity. The proposed approaches outperform existing approaches in terms of stiffness and auxeticity.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Biswajit Pal, Ananth Ramaswamy
Summary: This study presents a multi-scale approach to simulate the shrinkage and creep of concrete, addressing the limitations of existing macroscopic prediction models due to the heterogeneous nature of concrete. The model is validated with experimental data and compared to national codes and macroscopic models, demonstrating its effectiveness in overcoming the gaps in existing models.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Akash Kumar Behera, Mohammad Masiur Rahaman, Debasish Roy
Summary: Ceramics have attractive properties but low fracture toughness is a major drawback. There is interest in improving the mechanical performance of ceramics by tailoring residual stresses. However, there is a lack of computational models that can accurately predict crack paths and quantify the improved fracture toughness.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Bineet Kumar, Sandeep Kumar Dubey, Sonalisa Ray
Summary: This study aims to develop an energy-based theoretical formulation for predicting the evolution of the fracture process zone in concrete under fatigue loading. Experimental results and calibrations indicate that the specimen size and aggregate size affect the fracture behavior and process zone length of concrete.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Zheliang Wang, Hao Sheng, Xinyi Lin, Yifan Rao, Jia Liu, Nanshu Lu
Summary: In this study, an analytical framework is proposed for investigating the behavior of laminated beams with any number of layers under various bending conditions, and the theory is validated through finite element analysis. It was found that the number of layers, applied deformation, layer properties, and layer aspect ratio have an impact on the equivalent flexural rigidity.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Michael Schwaighofer, Markus Konigsberger, Luis Zelaya-Lainez, Markus Lukacevic, Sebastian Serna-Loaiza, Michael Harasek, Florian Zikeli, Anton Friedl, Josef Fussl
Summary: In this study, nanoindentation relaxation tests were re-evaluated on five industrial lignins extracted from different feedstocks. It was found that the viscoelastic properties of all tested lignins were practically identical and independent of the feedstock and the extraction processes.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Tian Han, Dandan Qi, Jia Ma, Chaoyang Sun
Summary: In this study, a generative design method was used to propose new modified lattice structures suitable for tensile and compressive loading conditions. By conducting experimental and finite element analyses, it was confirmed that the derived structures have improved load-bearing capacity and energy absorption compared to the original structures. The effects of shape parameters on mechanical properties were also discussed.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Wenbin Zheng, Jay Airao, Ramin Aghababaei
Summary: Spinodal decomposition of Ti1-xAlxN crystal structure significantly affects their physical properties. This study uses three-dimensional molecular dynamics simulations to investigate the phase transformation mechanism and surface finish during material removal in TiAlN. The simulations reveal that the aluminum content and cutting depth have a significant influence on the phase transformation process through spinodal decomposition.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Atasi Ghosh
Summary: The micro-mechanism of low cycle fatigue deformation behavior has been summarized and the recent development in the approach of numerical simulation of cyclic stress-strain behavior of polycrystalline metallic materials at multi-scale has been discussed.
MECHANICS OF MATERIALS
(2024)