Assessment of impact and hardness property of natural fiber and glass fiber hybrid polymer composite

2021 ◽  
Author(s):  
Smaranika Nayak ◽  
Dipak Kumar Jesthi ◽  
Subhrajyoti Saroj ◽  
Jatin Sadarang
Keyword(s):  
Glass Fiber ◽  
Polymer Composite ◽  
Natural Fiber ◽  
Hybrid Polymer ◽  
Hardness Property ◽  
Hybrid Polymer Composite

Investigation on the Mechanical Properties of Newly Formulated Hybrid Polymer Composite

2016 ◽  
Vol 852 ◽  
pp. 49-54
Author(s):  
G. Anand ◽  
R. Dhinakaran ◽  
R. Elansezhian ◽  
N. Alagumurthi
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Polymer Composite ◽  
Electroless Nickel ◽  
Nano Particles ◽  
Hybrid Polymer ◽  
Coated Glass ◽  
The Matrix ◽  
Nano Additives ◽  
Hybrid Polymer Composite

In this paper, synthesis characterization and testing of hybrid polymer composite reinforced with electroless coated glass fiber is reported. The poly vinyl ester based composite is prepared with Electroless nickel phosphorus (Ni-P) coated glass fiber as the reinforcement. The glass fiber is coated with Ni-P by electroless plating method. The electroless Ni-P coating increases coating uniformity which in turn significantly improves properties such as hardness, strength and wear resistance of the glass fiber. Nano additives (0.5 wt.%) such as iron oxide, titanium oxide, copper oxide, aluminum oxide and zinc oxide are added into the matrix as fillers. The influence of different Nano fillers and its effect on the mechanical properties are examined. The result showed that after adding different nano particles, TiO2 exhibited better properties when compared to composites with other nano additives. The experimental results showed that after Ni-P coating on the glass fiber, the ultimate tensile strength and compressive strength improved by 18% and 10% respectively and TiO2 added PMC with 63%, 25% and 5% respectively.

Post-Fatigue Creep and Stress Relaxation Response of a Hybrid Polymer Composite

2017 ◽  
Author(s):  
Raghu V. Prakash ◽  
Monalisha Maharana
Keyword(s):  
Stress Relaxation ◽  
Polymer Composites ◽  
Polymer Composite ◽  
Fatigue Loading ◽  
Synthetic Fiber ◽  
Relaxation Response ◽  
Hybrid Polymer ◽  
Fatigue Cycling ◽  
Creep And Stress Relaxation ◽  
Hybrid Polymer Composite

Polymer composites have a characteristic, composition specific visco-elastic property which influences the damage progression during fatigue cycling. While some researchers have studied the time dependent constitutive response of polymer composites during the first cycle of fatigue loading, very few have experimentally investigated the dependence of visco-elastic response of built-up polymer composite materials at various stages of fatigue cycling [1]. Our earlier studies on fatigue response of polymer composites focused primarily on the stiffness degradation as a function of applied cycles of loading, which represents the gross response of the material [2]. While doing such an experiment, complimentary experimental techniques to measure the temperature evolution was attempted through the use of infrared thermal imaging technique, which gave some insight into the change in temperature response as a function of fatigue cycling. However, there was no systematic measurement of creep and stress relaxation response of the composite material as a function of induced fatigue damage. The present paper describes the results of creep and stress-relaxation obtained during uni-axial fatigue loading of a hybrid polymer composite material. For this purpose, a woven carbon fiber mat was chosen as the synthetic fiber and Flax fiber in the unidirectional form was chosen as the natural fiber that is laid between the two layers of woven carbon fiber mat. Epoxy LY 556 and hardener Araldite® was used for building up of composite laminate by hand-lay-up technique. Dog-bone shaped tensile specimens with a gage width of 13 mm and gage length of 57 mm were extracted from the 250 × 250 mm sq. plate laminate of 2.1 mm thickness using a numerical controlled milling machine. The specimens were tested at 35% of their median tensile strengths under fatigue at a positive stress ratio (Pmin/Pmax) of 0.1 in tension-tension loading. Prior to start of fatigue loading, the specimens were held in load control and the strain in the gage length was measured for understanding the creep response over 2500 seconds. For stress-relaxation characterization, the specimens were held in extensometer control over a period of 2500 sec. The creep and stress relaxation tests were carried out after periodic intervals of fatigue cycling. It was observed that in the case of un-impacted specimens, the creep rate is consistent with the stiffness variation, which in turn, is dependent on the number of fatigue cycles - till it showed signs of de-lamination. Thereafter it was governed by the woven synthetic fiber response. Similarly, the stress relaxation response was found to decrease with increasing fatigue cycles. In case of impacted specimens, the local deformation had a prominent role in terms of creep and stress relaxation response.

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