Identification of the elastic and damping properties of jute and luffa fiber-reinforced biocomposites

2022 ◽  
pp. 447-473
Author(s):  
Hasan Koruk ◽  
Yusuf Saygili ◽  
Garip Genc ◽  
Kenan Y. Sanliturk
Keyword(s):  
Damping Properties ◽  
Fiber Reinforced

Rubber-Toughened Long Glass Fiber Reinforced Thermoplastic Composite

2012 ◽  
Vol 2 (4) ◽  
pp. 47-58
Author(s):  
Fabrizio Quadrini ◽  
Claudia Prosperi ◽  
Loredana Santo
Keyword(s):  
Glass Fiber ◽  
Thermoplastic Composite ◽  
Dissipated Energy ◽  
Powder Size ◽  
Damping Properties ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
Rubber Toughened ◽  
Long Glass Fiber ◽  
Rubber Particles

A rubber-toughened thermoplastic composite was produced by alternating long glass fiber reinforced polypropylene prepregs and rubber particles. Several composite laminates were obtained by changing the number of plies, the rubber powder size distribution, and the stacking sequence. Quasi-static mechanical tests (tensile and flexure) and time dependent tests (dynamic mechanical analysis and cyclic flexure) were carried out to evaluate strength and damping properties. As expected, 10 wt% rubber-filled laminates showed lower strengths than rubber-free laminates but the effect of the rubber on the composite damping properties was evident. At low rates, the rubber particles can also double the dissipated energy under cyclic loading, even if this effect disappears by increasing the test rate.

Damping properties of thermoplastic-elastomer interleaved carbon fiber-reinforced epoxy composites

2004 ◽  
Vol 64 (16) ◽  
pp. 2517-2523 ◽  
Author(s):  
Hajime Kishi ◽  
Manabu Kuwata ◽  
Satoshi Matsuda ◽  
Toshihiko Asami ◽  
Atsushi Murakami
Keyword(s):  
Carbon Fiber ◽  
Thermoplastic Elastomer ◽  
Epoxy Composites ◽  
Damping Properties ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced

Microwave Electromagnetic Field Influence on the Stability of Reinforced Carbon Plastics with Built-In Lightning Protective Coating during Dynamic Loads Action

2020 ◽  
Vol 992 ◽  
pp. 427-433
Author(s):  
I.V. Zlobina ◽  
N.V. Bekrenev
Keyword(s):  
Electromagnetic Field ◽  
Metal Structure ◽  
High Amplitude ◽  
Air Transport ◽  
Dynamic Loads ◽  
Damping Properties ◽  
Fiber Reinforced ◽  
Carbon Plastics ◽  
Cycle Loading ◽  
The Impact

Currently, significant part of advanced air transport structural elements is made of fiber-reinforced polymer composite materials (PCM), in particular, carbon plastics. In order to increase the resistance of these materials to static electricity and lightning discharges while air transport passes through lightning fronts, lightning protection coatings in the form of copper grids are incorporated into PCM structure . For load-bearing structures and aircraft shells, the influence of dynamic loads in the form of low-cycle high-amplitude loading and hitting by solid objects is typical. The presence of inbuilt metal structure introduces additional uncertainty into the anisotropic PCM perception of these loads. Studies of the strength of carbon-fiber-reinforced plastics with built-in LPC at low-cycle loading and their perception of shock load has been carried out. It is established that short-term processing in the microwave electromagnetic field leads to an increase in the strength of the samples under low-cycle loading by 210%. CFR with LPC absorbs a part of the shock impulse and does not transfer it completely to subsequent structures. The microwave electromagnetic field helps to improve the damping properties of materials by 19.5% in average with a low impact energy. With an increase in the impact force energy, the effect of the microwave electromagnetic field is manifested to a less extent; further improvement of the damping properties does not occur. It increases the elastic characteristics of the material and practically does not lead to cracking and exfoliation of the surface layer in the impact area. The results can be used in the development of technologies for final processing of the products made of PCM in order to increase their resistance to dynamic loads.

scholarly journals Effect of Hygrothermal Aging and Surface Treatment on the Dynamic Mechanical Behavior of Flax Fiber Reinforced Composites

Materials ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2376 ◽  
Author(s):  
Wang ◽  
Petrů
Keyword(s):  
Mechanical Behavior ◽  
Surface Treatment ◽  
Flax Fiber ◽  
Fiber Reinforced Polymer ◽  
Damping Properties ◽  
Fiber Reinforced ◽  
Hydrothermal Aging ◽  
Hygrothermal Aging ◽  
Dynamic Mechanical Behavior ◽  
Reinforced Polymer

The recent developments of FRP (fiber reinforced polymer) are towards the growth and usage of natural FRP in the field of engineering due to both environmental and economic benefits. Flax fiber is one of the most commonly used natural fibers. One of the critical factors affecting the mechanical behavior of FFRP (flax fiber reinforced polymer) is hygrothermal aging. Some experimental works have been conducted to investigate the effect of hydrothermal aging on static behavior of FFRP. However, fewer efforts have been made to study its damping properties after hydrothermal aging. In this paper, the effect of surface treatment (including alkalization, silanization, acetylation and alkali-silanization) on dynamic mechanical behavior of FFRP under hygrothermal aging is studied. The results show that water resistance and damping properties of FFRP are improved after surface treatment. The acetylation treated FFRP exhibits excellent damping performance among all treated specimens.

Lightweight Hybrid Composites of CFRP and Aluminum Foam

2015 ◽  
Vol 825-826 ◽  
pp. 482-489
Author(s):  
Christian Fiebig ◽  
Michael Koch
Keyword(s):  
Aluminum Foam ◽  
Volume Fraction ◽  
Hybrid Composites ◽  
Minimum Weight ◽  
Sandwich Composite ◽  
Sandwich Composites ◽  
Damping Properties ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic

The lightweight potential of components made of fiber-reinforced plastic can be enhanced by use of sandwich composites. So far, limited dynamic properties of plastic-based foams have prevented the use of sandwich composites in machine applications. The combination of closed-cell aluminum foam (ALF) and carbon fiber reinforced plastic (CFRP) provides a solution to this obstacle. Aluminum foam is characterized by favorable damping properties with minimum weight and CFRP provides high strength and stiffness at similarly low density. This paper deals with the design of a hybrid sandwich composite and its interpretation by using customized FEM simulations.Producing this kind of a sandwich composite in an economic production process presents a major challenge. Thus, a method has been developed that prevents excessive penetration of the resin into the pores of the aluminum foam. A high volume fraction of the resin in the foamed sandwich core would increase density and negatively influence damping properties. The implementation of a barrier layer will avoid this penetration. A DoE was developed and RTM process parameters were varied with the objective of achieving the highest specific bending stiffness. In preliminary experiments the appropriate range of injection pressure, mold temperature, and pressure force was determined. Tests with a nonwoven fabric could prevent the resin from infiltrating into the aluminum foam. Mechanical properties of the sandwich composite are only marginally affected.A model was developed to calculate the obtainable sandwich composite properties. The calculation method considers both the characteristics of the aluminum foam and the CFRP anisotropy. Based on this model a reliable calculation of the applied load could be accomplished. The design of the sandwich composite was targeting at high stiffness and determination of the natural frequency. Parallel to calculations, tests on specimen were performed and the obtained results were included into the calculation as part of the material model.

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