Gfrp Research Papers - Academia.edu (original) (raw)

Curing cycle has a strong impact on the thermal and mechanical behavior of thermosetting polymers. The extent of cross-linking which is a strong function of curing temperature and time is directly linked to the glass transition temperature (Tg) of the thermosetting polymer. This transition temperature speaks about the transformation of the polymer from glassy state to rubbery state, hence decides the applicability of the material at certain temperature with certain degree of safety and reliability. Hence assessment of Tg and its possible improvement is quite essential from material point of view. The present study is emphasized on the impact of post curing parameters on thermal as well as mechanical behavior of glass fiber reinforced polymer (GFRP) composite. Post curing was carried out at 3 different temperatures (80°C, 110°C and 140°C) for different time periods (2h, 4h, 6h, 8h and 12h). Short beam Shear (SBS) test was performed on each of the post cured samples to determine the a...

- by
- •
- Polymer Chemistry, Collagen Cross-linking, Multidisciplinary, Gfrp

The objective of the work was to investigate bi-axial characteristics of composite materials with cruciform geometry in both experimental and numerical techniques. The glass reinforced fibers with epoxy composites prepared by hand lay-up technique with various stacking sequences such as 0 0 /90 0 , 45 0 /45 0 , 15 0 /75 0 and 30 0 /60 0 . The fabricated composites were machined in cruciform shape, having dif erent notches namely circular, square and rhomboidal according to ASTM – D6856 standard by abrasive water jet machining to ensure dimensional accuracy of ± 0.1mm. The prepared cruciform specimens were tested using a biaxial fixture developed indigenously by taking the specifications of universal testing machine. The Young’s modulus, proof stress, ultimate tensile strength and fracture toughness were evaluated for 16 specimens of dif erent fibre orientations and notches using software. The response from the biaxial tensile testshowed highest stress developing in [0 0 /90 0] GFRP composites of 61.37 MPa with highest ultimate tensile strength of 71.93 MPa experimentally. Numerical simulation with ANSYS was showing maximum stresses developing in [0 0 /90 0] GFRP composites 65.37 MPa.

- by IAEME Publication
- •
- Numerical Analysis, Young's modulus, Gfrp, Iaeme Ijaret
- by Wit Derkowski
- •
- Composite Materials, Gfrp
- by Tom George and +1
- •
- Civil Engineering, Strengthening, Shear, Flexure
- by Domenico Asprone and +1
- •
- Mechanical Engineering, Civil Engineering, Aerospace Engineering, Finite Element

The paper and its study deals with the comparison in flexural strength of RC beams laminated with Carbon fibre reinforced polymer (CFRP) and/or Glass fibre reinforced polymer (GFRP). The main aim of this study to provide alternatives for CFRP as it is very costly material and made from non-renewable sources which are available in very few quantity. Various existing structures need changes in it due either end of its load bearing capacity or effects of corrosive chemicals, seepage, and other various defects in structure. Seismic retrofitting of constructions vulnerable to earthquakes is a current problem of great political and social relevance. The study is based on the behaviour and comparison of RC structures which were laminated and strengthened with CFRP and GFRP.

- by Ankita Singh
- •
- Taguchi method, Gfrp
- by Eman Abdallah
- •
- Materials Engineering, Seismic Design, Seismic, Cyclic Loading
- by Pietro Di Modica
- •
- Materials Science, Thermodynamics, Heat Transfer, CFRP

In this paper, we conducted a numerical analysis of the deformation behavior of Steel-reinforced concrete (RC) two-way slabs strengthened by glass fiber reinforced polymer (GFRP) with different widths and configurations. A total number of 36 RC slabs of 12 × 300 × 300 cm were used in this numerical study. Also, a column of 30 × 30 í µí±í µí± was considered in the center of the slab for applying static loading. The bonded GFRP strips had 5, 7.5 and 10 cm width (W) and configured in three models called PM1, PM2, and DM. In PM1 (strip length = 2.4 m) and PM2 (strip length =1.7 m) configurations, the strips were bonded in two directions parallel to the sides of the slab, while in DM configuration (strip length =1.7 m), strips were rotated with 45 degree angle around the central axis that is perpendicular to the surface of the slab. According to the comparison results, we found out that the 5-cm wide strips with PM1 configuration having a parallel space of 0.5 times the strip width (0.5í µí±) greatly reduced the deformation of RC two-way slab compared to other strip widths and configurations, while 10 í µí±í µí± strips under all configurations, highly increased the deformation when space between strips varied from 1.5í µí± to 2í µí±.

Adhesive bonding technology has played an essential role in the development and growth of the rehabilitation and repair of timber structures. The ability of a structural joint to maintain satisfactory long-term performance, often in... more

- by James Broughton
- •
- Engineering, Materials Engineering, Mechanical Engineering, Chemical Engineering

Fiber Reinforced Polymer (FRP) composite materials are finding increased
applications in a variety of engineering fields such as automotive, aeronautical, etc. and
subsequently, the accurate machining is needed for the composites has increased
enormously. The mechanism behind the machining of fiber reinforced polymer composite
is entirely different from the metals, and it brings about so many undesirable results, such
as sub-surface layer with cracks and delamination. Glass fiber reinforced polymer
(GFRP) composites have been steadily replacing metals as a better choice in place of
engineering materials for various applications. Drilling holes efficiently are vital to
minimize the waste and defects of GFRP. It is most essential to understanding the
machining behavior of GFRP. There is a need to turn to analytical and experimental
approaches to fully understand the machining process. This work aimed to make a
preliminary investigation on drilling behavior of the GFRP with the additional
reinforcement of silica and also to optimize process parameters.

- by IAEME Publication
- •
- Speed, Gfrp, Silica. Feed, Delamination Factor

Fibre reinforced polymer (FRP) composite system are used in many applications. This paper briefly reviews the history of FRP composite system and RCC beams and columns. The various applications of fibre reinforced polymer (FRP) are also reviewed. This review paper also deals with the various techniques of applying fibre reinforced polymer (FRP) composite system. Several recently published articles and technical papers dealing with fibre reinforced polymer (FRP) composites are critically reviewed. The purpose of this review paper is to study the retrofitting procedures technically and select the fibre reinforced polymer (FRP) composite material for experimental comparison of RCC beams and column with and without applying FRP composite system.

- by IJSTE - International Journal of Science Technology and Engineering
- •
- FRP, CFRP, Epoxy Resin, Gfrp
- by Thorsten Lemm
- •
- Molecular Biology, Kinetics, Regulation, Macromolecular X-Ray Crystallography

To prevent segregation and bleeding in concrete a some decade ago started practicing of fiber addition in concrete this gave a good result M30 mix is considered for work with 1% of fiber addition i.e 0.5% of Polypropylene + 0.5% of Hooked end Steel Fiber, with 0.45 w/c ratio and 1.5% of super plasticizer for workability of concrete. Conducted various tests like Slump cone test, compressive test, spilt tensile test, flexural test, and shear test for concrete. Then FRP product E-Glass fabric or GFRP used for lamination purpose of 900 gsm to specimens then laminated specimens are also tested above mentioned experiment expect slump test. Results are compared after 28 days of curing with normal concrete to hybrid concrete and with GFRP to without GFRP lamination. Result has shown increase in strength with normal to hybrid concrete and also increase in with GFRP lamination when compared to without GFRP lamination.

- by J4R - Journal for Research
- •
- Gfrp, Shear Test, Split Tensile Test, Hooked end Steel Fibre (HeSF)
- by Rautenstrauch Karl and +3
- •
- Civil Engineering, Reinforcement, Bautechnik, Polymer Concrete

Machining is one of the unavoidable operation after the processing of any type of
material. Because of the advancement in the technology and innovation in the materials
area, the composite materials are replacing and occupying the traditional materials
market rapidly. Among these composite materials, the Fiber Reinforced Polymer (FRP)
composite materials are found to be technically and structurally competitive and are
widely used in a number of engineering industrial applications. The machining of these
composites is found to be a complex phenomenon due to the influence of a number of
machining and material parameters related to machining. Since drilling is the most
frequently applied machining operation on composites, many research works were done
on the drilling of composites, which resulted in numerous parameters that have influence
on the drilling operation, impact on work material and cutting tool damage, cost of
machining, material removal rate etc. So, at the background, it was thought to have a
review on the issues related to drilling on the composite materials, which could help the
manufacturing sectors and researchers in order to enhance the productivity. Thus the aim
of this technical paper is to provide a detailed study of various issues related to drilling
of FRP composite materials. This paper also comprehensively addresses the success and
the failures of drilling operations, the factors associated with the drilling operation, their
impact on the various output parameters. In addition, this review paper also discusses
about the influences of a number of machining parameters and their influence on
machining.

- by IAEME Publication
- •
- ANOVA, CFRP, Delamination, Fiber Reinforced Polymer
- by luis ramos
- •
- Hybrid, Gfrp
- by Fernando Branco
- •
- Glass, FEM, Numerical Simulation, Gfrp
- by Ahmed Said
- •
- Materials Engineering, Seismic Design, Seismic, Cyclic Loading
- by Ehab El-Salakawy
- •
- Civil Engineering, Bridge Engineering, Planting, Fiber Reinforced Polymer

The objective of the work was to investigate bi-axial characteristics of composite materials with cruciform geometry in both experimental and numerical techniques. The glass reinforced fibers with epoxy composites prepared by hand lay-up technique with various stacking sequences such as 00 /900 , 450 /450 , 150 /750 and 300 /600 . The fabricated composites were machined in cruciform shape, having different notches namely circular, square and rhomboidal according to ASTM – D6856 standard by abrasive water jet machining to ensure dimensional accuracy of ± 0.1mm. The prepared cruciform specimens were tested using a biaxial fixture developed indigenously by taking the specifications of universal testing machine. The Young’s modulus, proof stress, ultimate tensile strength and fracture toughness were evaluated for 16 specimens of different fibre orientations and notches using software. The response from the biaxial tensile test showed highest stress developing in [00 /900 ] GFRP composites of 61.37 MPa with highest ultimate tensile strength of 71.93 MPa experimentally. Numerical simulation with ANSYS was showing maximum stresses developing in [00 /900 ] GFRP composites 65.37 MPa

- by IAEME Publication
- •
- Numerical Analysis, Young's modulus, Gfrp, Iaeme Ijaret
- by Fernando Branco
- •
- Hybrid, Gfrp
- by eslam soliman
- •
- Carbon Nanotubes, Fibers, Gfrp

This paper reports the architectural and engineering design, and construction, of The Faraday Pavilion, a GFRP elastic gridshell with an irregular grid topology. Gridshell structures are self-formed through an erection process in which they are elastically deformed, and the prediction and steering of this aspect becomes a central part of both architectural and engineering design processes. While there are existing architectural approaches to determining the geometry of other kinds of form-active structure, as well as new engineering approaches to the simulation of bending active structures, a fast and light-weight design approach to bending active structures is not currently developed. In this paper, we introduce an approach to the architectural design of a bending active structure whereby the shell form and grid topology are determined by simulation. Particular features are that the grid topology is not pre-described, but rather emerges as part of the simulation, and that different...

- by Christoph Gengnagel and +1
- •
- Bending, Gfrp
- by Danusa Tavares
- •
- FRP, Gfrp

An attempt has been made in this paper to evaluate the performance of internally confined concrete beams with externally bonded fibre reinforced polymer laminates using ANFIS software. Compressive strength, yield strength, thickness of FRP, spacing of stirrups, tensile strength of FRP have been considered as the input parameters. First crack load, deflection at first crack load, yield load, deflection at yield load, ultimate load, deflection at ultimate load, deflection ductility, energy ductility, crack width has been treated as the target parameters. All the performance parameters have been predicted using gaussmf membership function out of the eight membership functions available in the ANFIS software. The performance parameters such as first crack load, deflection at first crack load, yield load, deflection at yield load, ultimate load, deflection at ultimate load, deflection ductility, energy ductility, crack width predicted using the ANFIS tool correlated well with the performance parameters obtained through experiments.

- by IAEME Publication
- •
- Strength, Ductility, ANFIS, HSC

- by IAEME Publication
- •
- ANOVA, CFRP, Delamination, Fiber Reinforced Polymer

A FRP butt-joint was formed between two adherends of aluminium pipe of outside diameter of 25.40 mm and inside diameter of 22.20 mm. The joint was formed by winding a wetted roving of glass fiber / carbon fiber with controlled quantity of epoxy at Ã‚Â±45Ã‚Â° angle. It was cured to form the joint with a glass fiber reinforced polymer (GFRP) / carbon fiber reinforced polymer (CFRP) sleeve around the joint plane. For checking leakages in this joint dead weight pressure gauge tester was used. It can be inferred that pressure at which leakage takes place through FRP joint is directly proportional to the number of passes of glass / carbon fiber roving. It is because when number of passes of glass fiber increases, more compact FRP joint is formed which can undertake more pressure. Specimen with lesser number of passes of glass fiber / carbon fiber, leak through center of FRP joint while specimen of higher number of passes leak through either upper or lower side of FRP joint. During leak test, when the pressure inside the aluminium pipe increases, hoop stress also increase leading to expansion of aluminium pipe thereby forming the strong matrix of FRP. This formation of strong matrix increases the pressure at which leak occurs i.e. it enhances the results.

- by IJSRD Journal
- •
- CFRP, Gfrp, Frp Joint, Adherends

- by IAEME Publication
- •
- ANOVA, CFRP, Delamination, Fiber Reinforced Polymer

In the present scenario, the need for the natural fibre i
easy availability, low cost and eco
and carbon have more strength but the usage of these fibers had been restricted
because of the high cost involved in the specimen preparation. I
fibre was used as matrix and the natural fibers (coir and flax) were used as
reinforcement in two different
glass and flax) by using the binding agent epoxy resin. Specimens were fabr
according to the ASTM standards (ASTM D638
the mechanical properties such as tensile, impact and flexural were
the results it is found that the
6.54 KN compared to coir
coir which has 7.5 KN. GFRP reinforced with the
KN compared to coir which has 1.15 KN

- by IAEME Publication
- •
- Coir, Epoxy Resin, Flax, Gfrp

Nowadays composites became very popular due to its eminent physical and mechanical attributes. Composites are widely used in all the industries like the construction sector, ships, aerospace, automobile etc. One of the most indispensable attributes of the composites is a higher strength to weight ratio because of which it is widely used in aerospace parts. Further to ameliorate the properties of the composites microparticles could be added. In this thesis fabrication of glass fiber composites with microparticles in order to ameliorate the mechanical attributes such as tensile, flexural, impact strength and hardness by conducting tests such as tensile strength test, flexural strength, impact and micro Vickers hardness test, respectively. Machining of the composites has always been a complex problem in the case of glass fiber reinforced polymer matrix composites because of the laminar nature of the composites. In order to assemble the structural parts made by composites with the help of rivets and joints or nut-bolts, it is obligatory to drill the composites to make a hole. During the exit and the entry of the drill bit in the hole, composites undergo severe damages in the topmost layer and bottom-most layer which in turn results in the delamination of the layers. So in this thesis, the drilling process parameters cognate speed, feed and the weight percentage of alumina microparticles were optimized in order to optimize the output parameters like thrust force and delamination factor of the composites. The optimization of the parameters was done according to retaliation surface paradigm concept. The optimum values of input parameters are 1213 rpm speed, 0.16 mm/rev feed and 5.2 % wt. % of alumina microparticles. The corresponding optimal parameters for these parameters are 179.4 N thrust force, entry delamination factor 1.12 and exit delamination factor 1.17 with the desirability of 0.838.

- by Ijariit Journal
- •
- Mechanical Engineering, Civil Engineering, Drilling, Fabrication
- by Mohamed Sayed
- •
- Engineering, Recycling, Corrosion, Temperature
- by eslam soliman
- •
- Materials Science, Carbon Nanotubes, Fibers, Gfrp
- by Korin Holden
- •
- Civil Engineering, Case Studies, Finite element method, Bridge Engineering
- by Ashim paul
- •
- Sustainable Built Environment, Confinement, Gfrp
- by Francesco MICELLI
- •
- Civil Engineering, Ultraviolet, Building, Uv Radiation
- by Ananth Ramaswamy
- •
- Civil Engineering, Construction, Building, Building Materials
- by Israel Herszberg
- •
- Engineering, Glass, Mixed Mode, Delamination
- by Israel Herszberg
- •
- Engineering, Vibration, Measurement, Composite
- by Mohamed Sayed
- •
- Recycling, Corrosion, Temperature, Confinement

- by IAEME Publication
- •
- Strength, Ductility, ANFIS, HSC

This study represented the experimental results of FRP strengthened HSC beams with internal confinement. The first crack load, yield load, ultimate load, deflection at
first crack load, deflection at yield load, deflection at ultimate load and ductility indices were the study parameters. The test beams of cross section 150x250 and 3000 mm in length were cast and tested. The beams were subjected to two-point loading and tested up to failure. Deflections, crack width, spacing of cracks and number of cracks were measured at all stages of loading. The results revealed that the ductility
performance improved considerably through the introduction of internal confinement mechanism

- by IAEME Publication
- •
- Strength, Ductility, HSC, Gfrp

This work presents the design process, the analysis, and the performance of a cylindrical
hollow monopost, made entirely in composites. It is about a translucent structure of height 40m, external diameter 1.60m and the average wall-thickness 11mm. The material is a polymer made up of vinylster resin and reinforced by glass fiber (GFRP). The
manufactured processing used is filament winding. Moreover, due to geographical
emplacement where it is situated, the structure has to support wind velocity value above
180Km/h and its elastic modulus of the material does not exceed 25GPa. Eventually, we was able to achieve an optimum solution and strentgh structure, considering and developing differents types of approaches and analysis, such as linear, non-linear and buckling.

- by Ana Almerich-Chulia
- •
- Composites, Gfrp
- by Ueli Aebi and +3
- •
- Electron Microscopy, Molecular Biology, EM, Calcium
- by Andreas Engel
- •
- Electron Microscopy, Molecular Biology, EM, Calcium