Glass Reinforced Plastic.pptx

Mohammad Youssef, 2022

Retrofitting the technique of increasing the strength of existing concrete structure became a real concern in research. This report presents a study of an ongoing research on the use of new composites for enhancement of the performance of concrete beams. A cost efficient and effective way of retrofitting is used in this report where concrete beams were externally bonded with GFRP grid using one to five layers. The flexural, shear and compression performance of the beam specimens were compared with a control specimen. The test results show that the use of GFRP grid with epoxy binder is an efficient way to improve flexural strength, shear strength, compression, cracking behavior, and energy absorption capability. In comparison with different layers of GFRP grid, the use of 5 layers is the most efficient in flexural and shear strength and ductility.

2004

4 CHAPTER 4 EXPERIMENTAL TESTING 4.1 Overview Hot and humid environments can degrade some aspects of a material's performance particularly the compressive strength [58]. Water absorption by epoxy resins leads to a reduction in glass transition temperature and to a softening of the resin with loss of stiffness and strength which causes fibre micro-buckling and premature laminate failure [60].

Mechanics of Composite Materials, 2008

Keywords: re cy cling of plas tic scrap, dis in te gra tors, hy brid ge netic al go rithm, ar ti fi cial neu ral net works

Journal of Materials Science, 1986

The failure mechanisms in waisted tensile specimens of pultruded 60% volume fraction glass fibre-epoxide were investigated at atmospheric and superposed hydrostatic pressures extending to 350 MN m−2. The maximum principal stress at fracture decreased from ∼1.7 GN m−2 at atmospheric pressure to ∼1.3 GN m−2 at 250 MN m−2 superposed pressure and remained approximately constant at higher pressures, as had been observed with carbon fibre reinforced plastic (CFRP) and a nickel-matrix carbon fibre composite. In the high-pressure region the failure surfaces were fairly flat, consistent with the fracture process being solely controlled by fibre strength. Pre-failure damage, in particular debonding, was initiated at ∼0.95 GN m−2 at atmospheric pressure and this stress rose to ∼1.2 GN m−2 at 300 MN m−2 superposed pressure, i.e. by about 9% per 100 MN m−2. Unlike the pressure dependence in CFRP, this contrasts with the pressure dependence of the resin tensile strength, about 25% per 100 MN m−2, but can be associated with that of the fibre bundle/resin debonding stress, about 12% per 100 MN m−2 superposed pressure. Consistent with this interpretation, glass fibres of the failure surfaces were resin-free, again in contrast to CFRP.

Glass Reinforced Plastics, commonly known by various standards, as Fiber Reinforced Plastics (FRP), GRP, Glass Fiber Reinforced Plastic (GFRP), Reinforced Plastic Mortar Pipe (RPMP) or Reinforced Thermo-set Resin Plastic (RTRP) is an amalgamation of resin, glass fiber, manufactured using appropriate additives and treatment methods. It is a composite engineering material uniquely capable of meeting a wide variety of specific processes and end product requirements of various applications of fluid transport requirements. GRP piping system is often utilized in almost all applications to withstand aggressive service, ambient and environmental conditions. It has been successfully used in various piping systems and applications over the entire world. GRP piping industry in Libya has just started (i.e. since 2009), so such manufacturing plants are facing some difficulties during commissioning and production trails stage. GRP piping industry has wide variations both in designs and manufacturing techniques used. This paper will focuses and discuss the possible defects associated with the production of GRP pipes, from the point of view of human error, and or lower manufacturing skinless due to new technology introduction in the area. The survey will involve and demonstrate the usage of GRP for various aggressive fluids and its consequences. Finally, concluding remarks concerning defect types, causes, and the prevention of such defects will be presented.

— GFRP (Glass Fiber Reinforced Plastic) are the advanced materials for modern high technology products. The combination of different materials in manufacturing of GFRP composites like Glass fiber and Polymer matrix having different mechanical properties causes a problem in processing or cutting or making a hole due to their heterogeneous structures which are not common in metal components. Due to these varying properties, different defects are generated during processing of these materials. In this paper, various defects produced during cutting operations of GFRP composites are discussed.

2017

In this study prediction of the strength properties of composites made of polyester resin and continuous glass fiber reinforcement in established grades was performed. Structure modeling based on the numerical homogenization method was conducted using Digimat FE commercial code, taking into account the geometry and properties of all the composite components. In the first stage, analysis was performed for OCF M8610 mat. At the beginning the calculations were done for beam roving from S glass. Preliminary calculations were performed for the virtual composition of glass fibers-air, which allowed calculation of the yarn properties, directly used to build the glass mat model. The second stage of the calculation was carried out for glass mat saturated with polyester resin. For this purpose, roving bundle data and polymer matrix data were implemented. The volume fraction of the glass mat in the composite was also determined, and a random fiber orientation in the plane was defined. The prop...

Polymer Composites, 1998

The mechanical properties and the response to mechanical load of continuous glass fiber reinforced polyethylene terephthalate (GF/PET) laminates have been characterized. The laminates were manufactured by compression molding stacks of novel woven and warp knitted fabrics produced from commingled yarns. The laminate quality was examined by means of optical and scanning electron microscopy.

MATEC Web of Conferences

Composite materials for the most part depicted as the mixes of two or more materials that outcome in the unmistakable properties than that of guard materials. Fibre strengthened plastics have been all around utilized for get-together flying machine and transport key parts as a delayed consequence of their specific mechanical and physical properties, for example, high particular quality and high particular robustness. Another pertinent application for fibre maintained polymeric composites (particularly glass fibre strengthened plastics) is in the electronic business, in which they are utilized for passing on printed wiring sheets. The utilization of polymer composite materials is winding up being powerfully essential. The present work delineates the change and mechanical portrayal of new polymer composites including glass fibre fortress, epoxy and maple cellulose fibre. The starting late made composites are delineated for their mechanical properties. The composite spreads were set up by utilizing hand layup framework. The experiments were conducted on and studied the effect of post curing on hybrid composites. The result reveals that the samples only with natural fibre have more promising results compared with synthetic fibre. The synthetic fibres get wrinkled due to post curing were as no such visuals in the natural fibres.