405 Effects of Stress Waveform and Water Absorption on Fatigue Strength of Unidirectionally Reinforced Aramid/Epoxy Composite

2000 ◽  
Vol 2000.75 (0) ◽  
pp. _4-13_-_4-14_
Author(s):  
Kenjiro KOMAI ◽  
Kohji MINOSHIMA ◽  
Kazuto TANAKA ◽  
Tomomi TOKURA
Keyword(s):  
Fatigue Strength ◽  
Water Absorption ◽  
Epoxy Composite ◽  
Effects Of Stress

The effect of clam shell powder on kinetics of water absorption of jute epoxy composite

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Hemalata Jena ◽  
Abinash Panigrahi
Keyword(s):  
Water Absorption ◽  
Environmental Conditions ◽  
Epoxy Composite ◽  
Jute Fibre ◽  
Content Type ◽  
Clam Shell ◽  
New Class ◽  
Kinetics Of ◽  
Shell Powder ◽  
Marine Waste

Purpose Here, attempts have been made to explore the possible use of Marine waste as filler materials into the bio-fibre composites. Clam shell is a type of marine waste which belongs to the class of Bivalvia. It is mainly made of aragonite crystalline polymorphs. This paper aims to develop a new class of natural fibre composite in which jute fibre as reinforcement, epoxy as matrix and clam shell, as particulate microsphere filler. The study investigates the effects of different amounts of clam shell powder on the kinetics of water absorption of jute fibre-reinforced epoxy composite. Two different environmental conditions at room temperature, i.e. distilled water and seawater, are collected for this purpose. Moisture absorption reduces when clam shell is added to the jute-epoxy composite. The curve of water absorption of jute-epoxy composites with filler loading at both environmental conditions follows as Fickian behaviour. Design/methodology/approach Hand lay-up technique to fabricate the composite – Experimental observation Findings The incorporation of Clam shell filler in jute epoxy composite modified the water absorption property of the composite. Hence the present marine waste is an potential filler in jute fibre reinforced polymer composite. Originality/value The paper demonstrates a new class hybrid composite material which uses a marine waste as important phase in the bio-fibre-reinforced composite. It is a new work submitted for original research paper.

Experimental Research on the Mechanical Behavior of the Cracked Aluminum Plate Bonded by the Graphite/Epoxy Composite Patch

2013 ◽  
Vol 744 ◽  
pp. 432-435
Author(s):  
Yi Shan Zhang ◽  
Zun Wang ◽  
Zhi Wang
Keyword(s):  
Fatigue Strength ◽  
Mechanical Behavior ◽  
Experimental Research ◽  
Epoxy Composite ◽  
Aluminum Plate ◽  
Composite Patch

The effect of the graphite/epoxy composite patch parameters on the static and fatigue strength of the cracked aluminum plate was investigated experimentally. A series of specimens repaired by six types of composite patches including four different patch lengths and two different patch thicknesses were tested on the material tester. Specimens single-sided repaired and double-sided repaired by the same composite patches were also tested. The experiment results show that composite patches can provide an improvement in static and fatigue strength of the cracked aluminum plate, double-sided repair is more effective than single-sided repair, if the thickness and the length were selected properly, the composite patches can significantly enhance the strength of the repaired specimens.

Evaluation of thermal stability and damping behavior of electrical insulator waste reinforced thermoset polymer composite

2019 ◽  
Vol 233 (10) ◽  
pp. 3603-3618 ◽  
Author(s):  
P Sabarinathan ◽  
VE Annamalai ◽  
K Rajkumar
Keyword(s):  
Thermal Stability ◽  
Water Absorption ◽  
Glass Fiber ◽  
Epoxy Composite ◽  
Low Cost ◽  
Dynamic Mechanical Properties ◽  
Particle Dispersion ◽  
Electrical Insulator ◽  
Glass Fiber Reinforced ◽  
Damping Behavior

This paper deals with the influence of inorganic electrical insulator waste filler on the properties of glass fiber reinforced epoxy composite. The electrical insulator waste fillers were uniformly mixed in the resin through ultrasonication technique. Composites were made up with different percentages of filler (0, 5, 10, 20 wt%) and 20 wt% glass fiber using the hand lay-up method. Physical, mechanical, water absorption, thermal, and dynamic mechanical properties were studied. The experimental results indicate an increase in water absorption and density of composites with increased electrical insulator waste filler in the polymer matrix. Furthermore, the filler addition reduces the tensile strength and increases the flexural strength to 402 MPa at 20% addition. The thermogravimetric analysis reveals that the incorporation of electrical insulator waste filler increases the thermal stability considerably. Dynamic property reveals the damping property of the materials, in which the incorporation of 20% filler leads to higher storage modulus. Particle dispersion and failure mode were analyzed using scanning electron microscope. This work highlights the possibility for reprocessing electrical insulator waste as low-cost reinforcement in polymer composites.

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