Damping and vibration characteristics of basalt-aramid/epoxy hybrid composite laminates

2016 ◽  
Vol 36 (2) ◽  
pp. 173-180 ◽  
Author(s):  
Mehmet Bulut ◽  
Ömer Yavuz Bozkurt ◽  
Ahmet Erkliğ
Keyword(s):  
Composite Laminates ◽  
Hybrid Composites ◽  
Loss Modulus ◽  
Damping Ratio ◽  
Vibration Characteristics ◽  
Damping Properties ◽  
Aramid Fibers ◽  
Mixing Ratios ◽  
Twill Weave ◽  
Response Envelope

Abstract Damping and vibration characteristics of basalt-aramid/epoxy hybrid composites with different basalt/aramid fiber mixing ratios were investigated. Unidirectional basalt and twill weave aramid fibers were used as reinforcement. Non-hybrid basalt/epoxy and aramid/epoxy composite laminates were also fabricated for comparison. Dynamic characteristics of the composite laminates were determined experimentally using dynamic modal analysis. Damping properties were calculated with the logarithmic decrement method using a vibration response envelope curve. Loss modulus, storage modulus and damping ratio of the structures were also considered. It was observed that the results of hybrid configurations showed a distribution between non-hybrid basalt/epoxy and aramid/epoxy composites. Furthermore, the employment of aramid fibers in composite laminates enhances the damping properties of laminates, but reduces the strength values.

scholarly journals Vibration-damping characterization of the basalt/epoxy composite laminates containing graphene nanopellets

2019 ◽  
Vol 26 (1) ◽  
pp. 147-153 ◽  
Author(s):  
Mehmet Bulut ◽  
Ahmet Erkliğ ◽  
Peyami Kanmaz
Keyword(s):  
Composite Laminates ◽  
Natural Frequencies ◽  
Epoxy Composite ◽  
Dynamic Properties ◽  
Interfacial Strength ◽  
Vibration Characteristics ◽  
Damping Properties ◽  
Matrix Interactions ◽  
And Storage

AbstractThe present study investigates the influence of graphene nanopellets (GnPs) on the damping and vibration characteristics of fiber-reinforced basalt/epoxy composites for different weight contents of GnPs particles (0.1, 0.2 and 0.3 wt%). The variation of dynamic properties in terms of loss and storage modulus was explored by using the experimental modal analysis. The damping properties were determined by using logarithmic decrement method from the acceleration-time envelope curves. Results showed that the incorporation of GnPs at weight contents of 0.1% and 0.2% significantly affected the damping and vibration characteristics of the samples as a result of the interfacial strength between the GnPs particles-fiber-matrix interactions. The natural frequencies increased by 20.7% and 25% at GnPs contents of 0.1 and 0.2 wt%, whereas the damping ratios increased by 28.5% and 57.1%, respectively.

scholarly journals Experimental investigation on mechanical and vibration characteristics of Flax/CNSL composite laminates

2021 ◽  
Vol 1130 (1) ◽  
pp. 012004
Author(s):  
R Murugan ◽  
S Daniel Mc Arthur ◽  
G Bharath ◽  
S Abinesh ◽  
K Cibi Kumar ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Composite Laminates ◽  
Vibration Characteristics

Flexural Response of Inorganic Hybrid Composites With E-Glass and Carbon Fibers

2010 ◽  
Vol 132 (2) ◽  
Author(s):  
James W. Giancaspro ◽  
Christos G. Papakonstantinou ◽  
P. N. Balaguru
Keyword(s):  
Carbon Fibers ◽  
Hybrid Composite ◽  
Composite Laminates ◽  
Hybrid Composites ◽  
Glass Fibers ◽  
Composite Plates ◽  
Carbon Composite ◽  
Primary Objective ◽  
Flexural Capacity ◽  
Compression Failure

By far, carbon and glass fibers are the most popular fiber reinforcements for composites. Traditional carbon composites are relatively expensive since the manufacturing process requires significant heat and pressure, while the carbon fibers themselves are inherently expensive to produce. In addition, they are often flammable and their use is restricted when fire is a critical design parameter. Glass fabrics are approximately one order of magnitude less expensive than similar carbon fabrics. However, they lack the stiffness and the durability needed for many high performance applications. By combining these two types of fibers, hybrid composites can be fabricated that are strong, yet relatively inexpensive to produce. The primary objective of this study was to experimentally investigate the effects of bonding high strength carbon fibers to E-glass composite cores using a high temperature, inorganic matrix known as geopolymer. Carbon fibers were bonded to E-glass cores (i) on only the tension face, (ii) on both the tension and compression faces, or (iii) dispersed throughout the core in alternating layers to obtain a strong, yet economical, hybrid composite laminate. For each response measured (flexural capacity, stiffness, and ductility), at least one hybrid configuration displayed mechanical properties comparable to all carbon composite laminates. The results indicate that hybrid composite plates manufactured using 3k unidirectional carbon tape exhibit increases in flexural capacity of approximately 700% over those manufactured using E-glass fibers alone. In general, as the relative amount of carbon fibers increased, the likelihood of precipitating a compression failure also increased. For 92% of the specimens tested, the threshold for obtaining a compression failure was utilizing 30% carbon fibers. The results presented herein can dictate future studies to optimize hybrid performance and to achieve economical configurations for a given set of design requirements.

scholarly journals Dynamic Mechanical Properties of Hybrid Layered Silicates/Kaolin Geopolymer Filler in Epoxy Composites

2017 ◽  
Vol 54 (3) ◽  
pp. 543-545 ◽  
Author(s):  
Yusrina Mat Daud ◽  
Kamarudin Hussin ◽  
Azlin Fazlina Osman ◽  
Che Mohd Ruzaidi Ghazali ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Speed ◽  
Hybrid Composites ◽  
Loss Modulus ◽  
Dynamic Mechanical Properties ◽  
Mechanical Analysis ◽  
Layered Silicates ◽  
Epoxy Composites ◽  
Damping Factor ◽  
Dynamic Mechanical

Preparation epoxy based hybrid composites were involved kaolin geopolymer filler, organo-montmorillonite at 3phr by using high speed mechanical stirrer. A mechanical behaviour of neat epoxy, epoxy/organo-montmorillonite and its hybrid composites containing 1-8phr kaolin geopolymer filler was studied upon cyclic deformation (three-point flexion mode) as the temperature is varies. The analysis was determined by dynamic mechanical analysis (DMA) at frequency of 1.0Hz. The results then expressed in storage modulus (E�), loss modulus (E�) and damping factor (tan d) as function of temperature from 40 oC to 130oC. Overall results indicated that E�, E�� and Tg increased considerably by incorporating optimum 1phr kaolin geopolymer in epoxy organo-montmorillonite hybrid composites.

scholarly journals Evaluation of bearing capacity of reinforced concrete box ribbed arch bridge based on dynamic load test

2021 ◽  
Vol 233 ◽  
pp. 01047
Author(s):  
Mao He ◽  
Xin Fu ◽  
Shunchao Chen
Keyword(s):  
Reinforced Concrete ◽  
Dynamic Load ◽  
Damping Ratio ◽  
Vibration Characteristics ◽  
Load Test ◽  
Driving Safety ◽  
Original Material ◽  
Arch Bridge ◽  
Dynamic Load Test ◽  
And Function

Dynamic load test is to measure the natural vibration characteristics of the bridge structure or the forced vibration characteristics under dynamic load, and to evaluate the driving performance, driving safety and comfort of the bridge through dynamic load test. In order to evaluate the stress state and working performance of a reinforced concrete box-ribbed arch bridge, the load test of the bridge is carried out. Dynamic load test is used to test the inherent fundamental frequency, damping ratio and impact coefficient of the bridge through pulsation test and sports car test. Through the experiment with the key parts of the stress (strain) and displacement load and other important data, through analysis and study, the comprehensive analysis of the phenomenon of calculation and test, a comprehensive performance evaluation structure and function whether meet the design requirements, to provide technical basis for the safety of the bridge operation, and provide the original material for the bridge maintenance and management in the future.

Cutting Characteristics of Titanium Graphite Composite by Wire Electrical Discharge Machining

2012 ◽  
Vol 630 ◽  
pp. 114-120 ◽  
Author(s):  
Mamidala Ramulu ◽  
Mathew Spaulding ◽  
P. Laxminarayana
Keyword(s):  
Composite Laminates ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Hybrid Composites ◽  
Removal Rate ◽  
Wire Electrical Discharge Machining ◽  
Metal Composite ◽  
Workpiece Material ◽  
Graphite Composite ◽  
Wedm Process

To improve strength to weight ratios, the fiber reinforced polymer composite materials are often used in conjunction with another material, like metals, to form hybrid structure. This paper reports the feasibility of using wire electrical discharge machining (WEDM) for cutting Titanium/Graphite Hybrid Composites (TiGr). Slit and slot cuts with WEDM process has been performed. Cutting times and process parameters were recorded, and cut surface characteristics were evaluated both with an optical and scanning electron microscopy (SEM). The results in terms of cutting time, workpiece material removal rate, and damage were presented and discussed. It was found that use of WEDM is possible for machining advanced hybrid metal composite laminates with appropriate machine settings.

scholarly journals Mechanical Characterization and Impact Damage Assessment of Hybrid Three-Dimensional Five-Directional Composites

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1395 ◽  
Author(s):  
Liwei Wu ◽  
Wei Wang ◽  
Qian Jiang ◽  
Chunjie Xiang ◽  
Ching-Wen Lou
Keyword(s):  
Carbon Fiber ◽  
Impact Load ◽  
Hybrid Composites ◽  
Impact Damage ◽  
Three Dimensional ◽  
Low Velocity Impact ◽  
Aramid Fibers ◽  
Braided Composites ◽  
Low Velocity ◽  
Velocity Impact

The effects of braided architecture and co-braided hybrid structure on low-velocity response of carbon-aramid hybrid three-dimensional five-directional (3D5d) braided composites were experimentally investigated in this study. Low-velocity impact was conducted on two types of hybridization and one pure carbon fiber braided reinforced composites under three velocities. Damage morphologies after low-velocity impact were detected by microscopy and ultrasonic nondestructive testing. Interior damages of composites were highly dependent on yarn type and alignment. Impact damage tolerance was introduced to evaluate the ductility of hybrid composites. Maximum impact load and toughness changed with impact velocity and constituent materials of the composites. The composite with aramid fiber as axial yarn and carbon fiber as braiding yarn showed the best impact resistance due to the synergistic effect of both materials. Wavelet transform was applied in frequency and time domain analyses to reflect the failure mode and mechanism of hybrid 3D5d braided composites. Aramid fibers were used either as axial yarns or braiding yarns, aiding in the effective decrease in the level of initial damage. In particular, when used as axial yarns, aramid fibers effectively mitigate the level of damage during damage evolution.

Improvement of mechanical and thermal properties of hybrid composites through addition of halloysite nanoclay for light weight structural applications

2020 ◽  
pp. 152808372093662
Author(s):  
K C Nagaraja ◽  
S Rajanna ◽  
G S Prakash ◽  
G Rajeshkumar
Keyword(s):  
Thermal Properties ◽  
Composite Laminates ◽  
Morphological Analysis ◽  
Hybrid Composites ◽  
Mechanical And Thermal Properties ◽  
Light Weight ◽  
Building Structures ◽  
Suitable Alternative ◽  
Structural Applications ◽  
Infusion Technique

In this work the effect of stacking sequence of Carbon (C)/Glass (G) fibers and halloysites addition (1, 3 and 5 wt.%) on the mechanical and thermal properties of the hybrid composites were explored. The composite laminates were prepared by using Vacuum Assisted Resin Infusion Technique (VARIT). The outcomes disclosed that the hybrid composites having sequence of C2G3C2 (2-Carbon/3-Glass/2-Carbon layers) showed better overall properties. Moreover, the addition of halloysites enhanced the mechanical and thermal properties of the C2G3C2 hybrid composites. In particular, the hybrid composites added with 3 wt.% of halloysites showed higher overall properties among the other hybrid composites investigated. Finally, the morphological analysis was performed on the fractured surface of mechanical tested composites to study the failure mechanisms occurred. Based on the obtained results it can be concluded that the C2G3C2 hybrid composites added with 3 wt.% of halloysite could be a suitable alternative light weight material for automobile, aerospace and building structures.

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