Improvement of the mechanical and damping behavior of nylon by integration of nanoclay platelets

2021 ◽  
Vol 63 (12) ◽  
pp. 1124-1129
Author(s):  
Hari Bodipatti Subburamamurthy ◽  
Rajasekar Rathanasamy ◽  
Harikrishna Kumar Mohan Kumar ◽  
Moganapriya Chinnasamy ◽  
Gobinath Velu Kaliyannan ◽  
...  
Keyword(s):  
Free Vibration ◽  
Nylon 6 ◽  
Vibration Characteristics ◽  
Damping Factor ◽  
Melt Mixing ◽  
Weight Percentage ◽  
Specific Strength ◽  
Damping Behavior ◽  
Cloisite 30B ◽  
Fail Safe

Abstract Nylon is used as a gear material thanks to its beneficial characteristics, such as self-lubrication, noiseless and fail-safe operation. Poor resistance to heat, dimensional stability, shock and impact loads are major drawbacks of nylon when used in engineering applications. The addition of a nanofiller to a nylon matrix can enhance its mechanical and vibrational properties. Montmorillonite nanoclay (Cloisite 15 A, Cloisite 20 A and Cloisite 30B) modified with ammonium salt was incorporated into the Nylon 6 matrix by solution mixing and melt mixing. Nanoclay with 1, 2 and 3 wt.-% were added to the nylon matrix and the resulting mechanical and free vibration characteristics were determined. The experimental results of the mechanical and free vibration behavior were compared with the ANSYS results. Tensile strength, modulus of elasticity, specific strength, specific stiffness, natural frequency and damping factor were found to increase as the weight percentage of the nanoclay in the nylon matrix increased. Cloisite 30B nanocomposite shows better mechanical and free vibration characteristics when compared with pure Nylon 6, Cloisite 15 A and Cloisite 20 A nanocomposites. The Cloisite 30B nano-composite was prepared with 2 wt.-% shows maximum mechanical and free vibration performance.

Damping Influence of System Vibration

2011 ◽  
Vol 71-78 ◽  
pp. 1889-1892
Author(s):  
Min Yuan Huang
Keyword(s):  
Free Vibration ◽  
Low Frequency ◽  
Harmonic Excitation ◽  
External Condition ◽  
Vibration Characteristics ◽  
Parameter Determination ◽  
Damping Factor ◽  
Fundamental Vibration ◽  
Frequency Effects ◽  
System Vibration

Regarding the system vibration as the research object, we study vibration characteristics of the system vibration under the damping action. The primary coverage is as follows: under the external condition of undamped condition, damping condition, free vibration, and harmonic excitation, etc., the fundamental vibration form possesses vibration characteristics. In the project practice, the damping factor’s role to the vibrating system, as well as parameter determination is the damping factor. Low frequency effects on the structure system along with the effective of controlling resonance. In the damping treatment, we have characteristics demand for the damping. Through thorough analysis to damping action, we will obtain the best project fitting.

scholarly journals Self-Reinforced Nylon 6 Composite for Smart Vibration Damping

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1235
Author(s):  
Bidita Salahuddin ◽  
Rahim Mutlu ◽  
Tajwar A. Baigh ◽  
Mohammed N. Alghamdi ◽  
Shazed Aziz
Keyword(s):  
Matrix Material ◽  
Nylon 6 ◽  
Vibration Damping ◽  
Vibration Energy ◽  
Damping Factor ◽  
Passive Vibration Control ◽  
Reinforced Composite ◽  
Coiled Structure ◽  
The Matrix ◽  
3D Printed

Passive vibration control using polymer composites has been extensively investigated by the engineering community. In this paper, a new kind of vibration dampening polymer composite was developed where oriented nylon 6 fibres were used as the reinforcement, and 3D printed unoriented nylon 6 was used as the matrix material. The shape of the reinforcing fibres was modified to a coiled structure which transformed the fibres into a smart thermoresponsive actuator. This novel self-reinforced composite was of high mechanical robustness and its efficacy was demonstrated as an active dampening system for oscillatory vibration of a heated vibrating system. The blocking force generated within the reinforcing coiled actuator was responsible for dissipating vibration energy and increase the magnitude of the damping factor compared to samples made of non-reinforced nylon 6. Further study shows that the appropriate annealing of coiled actuators provides an enhanced dampening capability to the composite structure. The extent of crystallinity of the reinforcing actuators is found to directly influence the vibration dampening capacity.

Synergy of fiber length and content on free vibration and damping behavior of natural fiber reinforced polyester composite beams

2014 ◽  
Vol 56 ◽  
pp. 379-386 ◽  
Author(s):  
K. Senthil Kumar ◽  
I. Siva ◽  
P. Jeyaraj ◽  
J.T. Winowlin Jappes ◽  
S.C. Amico ◽  
...  
Keyword(s):  
Free Vibration ◽  
Fiber Length ◽  
Natural Fiber ◽  
Composite Beams ◽  
Fiber Reinforced ◽  
Damping Behavior ◽  
Polyester Composite

scholarly journals Free Vibration Analysis of Fiber Metal Laminated Straight Beam

2018 ◽  
Vol 16 (1) ◽  
pp. 944-948 ◽  
Author(s):  
Sinan Maraş ◽  
Mustafa Yaman ◽  
Mehmet Fatih Şansveren ◽  
Sina Karimpour Reyhan
Keyword(s):  
Free Vibration ◽  
Vibration Analysis ◽  
High Performance ◽  
Free Vibration Analysis ◽  
Vibration Characteristics ◽  
Numerical Results ◽  
Experimental Results ◽  
Hybrid Structures ◽  
Straight Beam ◽  
Fiber Metal

AbstractIn recent years, studies on the development of new and advanced composite materials have been increasing. Among these new technological products, Fiber Metal Laminates (FML), and hybrid structures made of aluminium, carbon, glass or aramid fiber, are preferred especially in the aircraft industry due to their high performance. Therefore, free vibration analysis is necessary for the design process of such structures. In this study, the vibration characteristics of FML for clamped-free boundary conditions were investigated experimentally and numerically. Firstly, numerical results were obtained using Finite Element Method (FEM) and then these results were compared with the experimental results. It was seen that the numerical results were in good agreement with the experimental results. As the theoretical model was justified, the effects of various parameters such as number of layers, fiber orientations, and aluminium layer thickness on the in-plane vibration characteristics of the FML straight beam were analysed using FEM. Thus, most important parameters affecting the vibration characteristics of the hybrid structures were determined.

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