Effect of Fiber Length and Content on the Mechanical Properties of Pineapple Leaf Fiber Reinforced-Epoxy Composites

2021 ◽  
Vol 106 ◽  
pp. 68-77
Author(s):  
Mohit Mittal ◽  
Rajiv Chaudhary
Keyword(s):  
Mechanical Properties ◽  
Fiber Length ◽  
Research Work ◽  
Total Content ◽  
Epoxy Composites ◽  
Fiber Volume ◽  
Pineapple Leaf Fiber ◽  
Geometrical Dimensions ◽  
Composite Samples ◽  
Leaf Fiber

The behavior of a composite material under mechanical loading condition is significantly influenced by the geometrical dimensions (length and diameter) and the total content of reinforcing fiber. Therefore, this research work focused the effect of fiber length and content on the mechanical behavior of pineapple leaf fiber (PALF) reinforced-epoxy composites. In this regard, the total of four composite samples for each fiber length (10, 15, 20, and 25 mm) and content (17, 23, 34, and 43 vol.%) were developed using a hand lay-up molding technique and characterized for mechanical properties according to ASTM standards. The tensile and flexural strength of a composite was increased with the increase of PALF length and content up to 15 mm and 34 vol.% respectively. However, the composite of 25 mm fiber length with 43% fiber volume content exhibits the maximum impact strength.

Monitoring of mechanical properties of prestressed glass fiber epoxy composites over 12 months after fabrication

2021 ◽  
pp. 002199832110047
Author(s):  
Mahmoud Mohamed ◽  
Siddhartha Brahma ◽  
Haibin Ning ◽  
Selvum Pillay
Keyword(s):  
Mechanical Properties ◽  
Residual Stress ◽  
Flexural Strength ◽  
Compressive Residual Stress ◽  
Fiber Volume Fraction ◽  
Volume Fraction ◽  
Epoxy Composites ◽  
Flexural Properties ◽  
Initial Increase ◽  
Fiber Volume

Fiber prestressing during matrix curing can significantly improve the mechanical properties of fiber-reinforced polymer composites. One primary reason behind this improvement is the generated compressive residual stress within the cured matrix, which impedes cracks initiation and propagation. However, the prestressing force might diminish progressively with time due to the creep of the compressed matrix and the relaxation of the tensioned fiber. As a result, the initial compressive residual stress and the acquired improvement in mechanical properties are prone to decline over time. Therefore, it is necessary to evaluate the mechanical properties of the prestressed composites as time proceeds. This study monitors the change in the tensile and flexural properties of unidirectional prestressed glass fiber reinforced epoxy composites over a period of 12 months after manufacturing. The composites were prepared using three different fiber volume fractions 25%, 30%, and 40%. The results of mechanical testing showed that the prestressed composites acquired an initial increase up to 29% in the tensile properties and up to 32% in the flexural properties compared to the non-prestressed counterparts. Throughout the 12 months of study, the initial increase in both tensile and flexural strength showed a progressive reduction. The loss ratio of the initial increase was observed to be inversely proportional to the fiber volume fraction. For the prestressed composites fabricated with 25%, 30%, and 40% fiber volume fraction, the initial increase in tensile and flexural strength dropped by 29%, 25%, and 17%, respectively and by 34%, 26%, and 21%, respectively at the end of the study. Approximately 50% of the total loss took place over the first month after the manufacture, while after the sixth month, the reduction in mechanical properties became insignificant. Tensile modulus started to show a very slight reduction after the fourth/sixth month, while the flexural modulus reduction was observed from the beginning. Although the prestressed composites displayed time-dependent losses, their long-term mechanical properties still outperformed the non-prestressed counterparts.

Influence of fiber volume fraction and curing temperature on mechanical properties of jute/PLA green composites

2019 ◽  
Vol 28 (4) ◽  
pp. 273-284
Author(s):  
Jai Inder Preet Singh ◽  
Sehijpal Singh ◽  
Vikas Dhawan
Keyword(s):  
Mechanical Properties ◽  
Flexural Strength ◽  
Fiber Volume Fraction ◽  
Natural Fiber ◽  
Volume Fraction ◽  
Matrix Material ◽  
Research Work ◽  
Curing Temperature ◽  
Green Composites ◽  
Fiber Volume

Rising environmental concerns and depletion of petrochemical resources have resulted in an increased interest in biodegradable natural fiber-reinforced polymer composites. In this research work, jute fiber has been used as a reinforcement and polylactic acid (PLA) as the matrix material to develop jute/PLA green composites with the help of compression molding technique. The effect of fiber volume fraction ranging from 25% to 50% and curing temperature ranging from 160°C to 180°C on different samples were investigated for mechanical properties and water absorption. Results obtained from various tests indicate that with an increase in the fiber volume fraction, tensile and flexural strength increases till 30% fiber fraction, thereafter decreases with further increase in fiber content. Maximum tensile and flexural strength of jute/PLA composites was obtained with 30% fiber volume fraction at 160°C curing temperature. The trend obtained from mechanical properties is further justified through the study of surface morphology using scanning electron microscopy.

Study on Degumming Technology and Properties of Pineapple Leaf Fiber

2014 ◽  
Vol 484-485 ◽  
pp. 70-74
Author(s):  
Yu Ling Zhao ◽  
Zhuo Zhang
Keyword(s):  
Mechanical Properties ◽  
Good Condition ◽  
Fiber Surface ◽  
Relative Strength ◽  
Good Effect ◽  
Gravimetric Analysis ◽  
Scanning Calorimetry ◽  
Advantages And Disadvantages ◽  
Pineapple Leaf Fiber ◽  
Leaf Fiber

This paper analyzes several existing pineapple leaf fiber degumming methods and their advantages and disadvantages and describes its relationship with the degumming from the structure characteristics and chemical properties of pineapple leaf fiber. The author puts forward the pineapple leaf fiber degumming technology should be to "high-quality, efficient, low consumption, low pollution" direction of development, and put forward a new method of degumming. By means of scanning electron microscope, infrared spectroscopy, mechanical properties, thermal gravimetric analysis, differential scanning calorimetry and other means, to study the structure, mechanical properties and thermal properties of pineapple leaf fiber biochemical degumming treatment. The results show that: biochemical degumming can take off the original fiber, fiber surface glue residue, single fiber are glial exist, but the fiber separation in good condition, the fiber surface is smooth; hemicellulose degradation in biochemical degumming process, but did not completely removed; no effect on biochemical degumming of pineapple leaf fiber structure has good effect, degumming the treated fiber; degumming relative strength; fiber still has relatively high heat resistance.

scholarly journals Experimental Analysis of Tensile Mechanical Properties of Sprayed FRP

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Zhao Yang ◽  
Kun Wu
Keyword(s):  
Mechanical Properties ◽  
Fiber Length ◽  
Fiber Type ◽  
Volume Ratio ◽  
Strain Curve ◽  
Uniaxial Tensile ◽  
Stress Strain Curve ◽  
Fiber Volume ◽  
Tensile Performance ◽  
Type Fiber

To study the tensile mechanical properties of sprayed FRP, 13 groups of specimens were tested through uniaxial tensile experiments, being analyzed about stress-strain curve, tensile strength, elastic modulus, breaking elongation, and other mechanical properties. Influencing factors on tensile mechanical properties of sprayed FRP such as fiber type, resin type, fiber volume ratio, fiber length, and composite thickness were studied in the paper too. The results show that both fiber type and resin type have an obvious influence on tensile mechanical properties of sprayed FRP. There will be a specific fiber volume ratio for sprayed FRP to obtain the best tensile mechanical property. The increase of fiber length can lead to better tensile performance, while that of composite thickness results in property degradation. The study can provide reference to popularization and application of sprayed FRP material used in structure reinforcement.

Improving the mechanical properties of short pineapple leaf fiber reinforced natural rubber by blending with acrylonitrile butadiene rubber

2017 ◽  
Vol 57 ◽  
pp. 94-100 ◽  
Author(s):  
Nuttapong Hariwongsanupab ◽  
Sombat Thanawan ◽  
Taweechai Amornsakchai ◽  
Marie-France Vallat ◽  
Karine Mougin
Keyword(s):  
Mechanical Properties ◽  
Natural Rubber ◽  
Butadiene Rubber ◽  
Fiber Reinforced ◽  
Acrylonitrile Butadiene Rubber ◽  
Pineapple Leaf Fiber ◽  
Leaf Fiber
Sign in / Sign up

Export Citation Format

Share Document