IRJET- Study on Effect of Microwave Irradiation on Tensile strength of Glass fiber and Hemp Reinforced Polymer Composites (original) (raw)
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Glass fiber and Hemp Reinforced polymer composites seem to be the best alternative composite material and having superior properties over natural fibers. The glass fiber and hemp incorporated composites were fabricated with Epoxy resin, Microwave Radiation were passed on them and the tensile strength of these composite samples were noted and analyzed. The specimen is prepared according to ASTM standards. The effect of combination of fibers before and after irradiation is investigated. The samples were tested by Digital UTM machine. It generates graphs between force and displacement has been obtained directly from machine by applying pull load on it. From observed reading Without Radiation at Room temperature the maximum tensile strength obtained was 49.73MPa. The best Microwave Radiation dosages for Glass fiber and Hemp Reinforced polymer composites is obtained when the samples were heated at 120 0 C for 8 minutes and 24seconds. The maximum Tensile strength obtained was 79.2MPa which is 1.6 times more than the specimen which was not irradiated. © 2020, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 1129
One of the problems with the use of carbon fiber-reinforced plastics (CFRP) is the difficulty of recycling or disposing of them. Hence, it is necessary to find processes to treat CFRP wastes faster and more effectively. Because carbon fibers are good microwave absorbers, there is significant potential for the use of microwave irradiation for the processing of CFRP wastes. In this study, the relationship of mechanical properties and radiation temperature during microwave irradiation of unidirectional and clothtype CFRP were studied. Experimental results indicate that microwave irradiation degrades CFRP's mechanical properties by breaking down the bond between the polymer matrix and the carbon fibers.
International Journal of Engineering Research and Technology (IJERT), 2013
https://www.ijert.org/investigation-on-mechanical-properties-of-various-microwave-cured-natural-fibre-reinforced-polymer-composites https://www.ijert.org/research/investigation-on-mechanical-properties-of-various-microwave-cured-natural-fibre-reinforced-polymer-composites-IJERTV2IS100663.pdf The development of natural fibre reinforced polymer composites has received widespread attention due to their environment friendly characteristics over the synthetic fibre based polymer composites. Although, different categories of natural fibre reinforced composites have been developed, their joining has not been explored extensively. In the present research initiative, natural fiber reinforced polypropylene composites have been prepared by microwave curing. The advantage of microwave processing is that it leads to significantly faster curing times compared to thermal processing. The fast heating rate encountered using microwave energy can thus lead to reduced processing time and consequent energy efficiency. In order to distinguish the effect of various fibres in the polymer matrix which is cured by microwave curing, a number of experiments were performed. Details of the experiments conducted along with the results were discussed in the paper and it concludes.
The development of natural fibre reinforced polymer composites has received widespread attention due to their environment friendly characteristics over the synthetic fibre based polymer composites. Although, different categories of natural fibre reinforced composites have been developed, their joining has not been explored extensively. In the present research initiative, natural fiber reinforced polypropylene composites have been prepared by microwave curing. The advantage of microwave processing is that it leads to significantly faster curing times compared to thermal processing. The fast heating rate encountered using microwave energy can thus lead to reduced processing time and consequent energy efficiency. In order to distinguish the effect of various fibres in the polymer matrix which is cured by microwave curing, a number of experiments were performed. Details of the experiments conducted along with the results were discussed in the paper and it concludes.
One important thing to be studied in the bonding of thermoplastic composite material using microwave irradiation is the effects of microwave energy on the matrix and fibre reinforcement of the composite. In this research, thirty three percent by weight random glass fibre reinforced polystyrene [PS/GF (33%)] is chosen for the study. Microscopy study is used to find out the microstructural characteristics along and around the interface of the welds. The separation distance of the reinforcing carbon filaments was varied and heat transfer in the material during joining was studied. The reasons why the thermoplastic matrix composite materials were weakened by prolonged microwave irradiation were also studied and analysed.
Degradation Behavior of Carbon Fiber Reinforced Plastic (CFRP) in Microwave Irradiation
ASEAN Journal of Chemical Engineering, 2007
Carbon fiber reinforced plastic (CFRP) composites are being used increasingly not only in strengthening structures of civil infrastructures and aerospace or automotive industries but also in many applications such as in medical fields or chemical plants. The present study relates to resin compositions having beneficial physical and mechanical properties, which may include improved resistance to delamination. This study focused on the different behaviors of CFRP composites when subjected to microwave irradiation. Based on the results of the 3-point bending test and SEM images, the delamination tendencies of breaking the CFRP under microwave were discussed. The results can be summarized as follows: (1) CFRP can be degraded under microwave irradiation; (2) two delamination tendency curves of CFRP by microwave irradiation were observed; (3) only the bending strength values of CFRP decreased with increasing microwave power and residence time; and, (4) the degradation of CFRP by microwave...
Fiber Reinforced Polyester Resins Polymerized by Microwave Source
Journal of Materials Engineering and Performance, 2007
Polyester resin based composite materials are widely used in the manufacture of fiberglass boats. Production time of fiberglass laminate components could be strongly reduced by using an intense energy source as well as microwaves. In this work a polyester resin was used with 2% by weight of catalyst and reinforced with chopped or woven glass fabric. Pure resin and composite samples were cured by microwaves exposition for different radiation times. A three point bending test was performed on all the cured samples by using an universal testing machine and the resulting fracture surfaces were observed by means of scanning electron microscopy (SEM). The results of mechanical and microscopy analyses evidenced that microwave activation lowers curing time of the composite while good mechanical properties were retained. Microwaves exposition time is crucial for mechanical performance of the composite. It was evidenced that short exposition times suffice for resin activation while long exposure times cause fast cross linking and premature matrix fracture. Furthermore high-radiation times induce bubbles growth or defects nucleation within the sample, decreasing composite performance. On the basis of such results microwave curing activation of polyester resin based composites could be proposed as a valid alternative method for faster processing of laminated materials employed for large-scale applications.
Studies on mechanical strengths of hemp-glass fibre reinforced epoxy composites
IOP Conference Series: Materials Science and Engineering, 2018
The objective of this study is to produce hemp and glass fiber incorporated composites with epoxy resin polymer matrix and to determine the mechanical strengths like, impact strength, tensile strength and flexural strength of the different samples. The hemp and glass fibres reinforced composite material components and products plays a major role in the field of automobile and construction sectors. By using hand layup process the different composite samples are fabricated as per the ASTM standards and the specimens were tested with aid of UTM tensile testing machine and charpy impact energy testing machine. The experimental reading of tested samples indicates that the untreated hemp and glass fibres composite exhibit the excellent tensile and flexural strengths. From the tested samples the SEM analysis was carried out to study the morphological properties
Defence Technology, 2018
The effect of microwave treatment on the tensile properties of treated sugar palm fibre with 6% NaOH reinforced thermoplastic polyurethane composites was investigated. Firstly, the sugar palm fibres were treated by 6% alkali solution. Then, microwave treatment was used to treat the alkali treated sugar palm fibres. Three types of temperatures (i.e. 70, 80 and 90 C) were applied in microwave treatment. The extruder and hot press machines were used to mixing the sugar palm fibres and polyurethane resin, and fabricate the composites. Tensile properties (i.e. tensile strength, tensile modulus and elongation at break) were studied by following the ASTM D-638 standard. The highest tensile strength was recorded 18.42 MPa with microwave temperature at 70 C and 6% alkali pre-treatment. Therefore, the temperature 70 C of microwave treatment may consider the best degree cent grate.
Advances in Materials, 2015
Polymer composites by and large found suitable for many specific applications in the field of electrical, electronics, marine, aerospace and microelectronics. Thus a new technique for processing polymer composites has been explored and one such is microwave curing. The roles of microwave in the post curing of polymer matrix composites cannot be under estimated, as it has the capacity to improve the mechanical properties of the composite produced. The aim of the study is to determine the effect of microwave post curing on the tensile property of aluminum reinforced and carbon black reinforced unsaturated polyester composites. This effect was compared with that post cured using conventional oven with the objective of investigating the significance of microwave curing on the tensile strength of the produced composites. A specific study comprising of aluminum filled polyester based composite and carbon black filled polyester based composite were investigated using two different composite curing methods (microwave and conventional thermal heating). The investigation, through experimentation was based on mechanical property (tensile strength) of the produced composites. Comparing the results of the post-curing of the composites using microwave and conventional methods, there is direct relationship between the tensile strength and the percentage weight fraction of the fillers with respect to the post curing methods. 30% aluminum filled, post cured in microwave has 0.01 MPa tensile strength, 20% aluminum filled (microwave) has 0.0076MPa while 30% aluminum filled (conventional oven curing) has 0.0092MPa and 20% aluminum filled (conventional oven curing) has 0.0068MPa.It was concluded that post-curing of the particulate composites through microwave is able to improve the tensile strength better as compared to thermal conventional method.