Determination of flow front velocity and optimal injection pressures for better impregnation of E-glass with polyester in resin transfer mold
Journal Title: INCAS BULLETIN - Year 2019, Vol 11, Issue 3
Abstract
Flow front velocity of resin plays a key role in yielding better impregnation of fiber reinforcement in resin transfer molding to fabricate quality composites. A video camera was used to capture the patterns of resin flowing below the grid lines drawn on the acrylic sheet of resin transfer mold and also to accurately measure the flow front velocity using an image conversion tool. The effect of flow front velocity, permeability, Reynolds number and void content at five different injection pressures on chopped strand E-glass/polyester composites consisting of 4, 5 and 6 layers has been studied. On the basis of Reynolds number of resin flow and void content present in the composite, optimal injection pressures are suggested for better impregnation of preform. Composites processed at these injection pressures gave superior properties in tension and flexure. Fractured parts of the specimens were examined on Scanning Electron Microscope to explain the causes of superior mechanical properties.
Authors and Affiliations
Phaneendra Kumar KOPPARTHI, Vengal Rao KUNDAVARAPU, Venkata Ravishankar DASARI, Bhaskara Rao PATHAKOKILA
Keywords
Related Articles
- EP ID EP631467
- DOI 10.13111/2066-8201.2019.11.3.8
- Views 77
- Downloads 0
Case Study regarding the test of the new screw compressor with high delivery pressure - 45 bara - on the test bench (with air)
Screw compressors, which are part of positive displacement compressors, can find an increasing use in gas industry and beyond due to their advantages. Maximal parameters of these devices, done by Comoti under GHH-Rand li...
The Multipoint Global Shape Optimization of Flying Configuration with Movable Leading Edges Flaps
The aerodynamical global optimized (GO) shape of flying configuration (FC), at two cruising Mach numbers, can be realized by morphing. Movable leading edge flaps are used for this purpose. The equations of the surfaces o...
Algorithm and code for analyzing hyperspectral images using the Hurst exponent
The main goal of this paper is to present the implementation of an algorithm developed to calculate the Hurst exponent (H), applied here to characterize the pixel spectrum from hyperspectral image. Because a hyperspectra...
Performance evaluation of propulsion systems as LEO deorbiting devices
This paper evaluates the possibility of deorbiting a launch vehicle upper-stage at end-of-mission from low Earth orbit, by using an additional propulsion system as a means of achieving deorbiting and complying with the “...
An important achievement of Professor Ion Stroescu: the wind tunnel of the Polytechnic School of Bucharest
This paper summarizes the contribution of Ion Stroescu to the experimental aerodynamics development in Romania through the design, in collaboration with Professor Elie Carafoli, of the subsonic wind tunnel of the Polytec...