Analysis of cylindrical shaped component using composite (GFRP) material (original) (raw)
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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...
Composite materials with high specific strength and specific modulus properties are mainly used in the automotive and aerospace industries. Currently, a lot of research is happening on advanced composite materials in order to improve these properties. The objective of the present work focused on, the studies related to the effect of laterally reinforced hypodermic steel tubes in Glass Fiber Reinforced Plastic (S-GFRP) composite by estimating strength to weight ratio. These specimens were prepared using hand layup process. From experimental data, mechanical properties like ultimate compressive ultimate strength, stiffness, strength to weight ratio determined. The experimental results show that a GFRP specimen with lateral reinforcement of hypodermic steel tubes (S-GFRP) give high stiffness and high strength to weight ratio compared to that of plane fiber reinforced plastic (GFRP).
A methodology for the investigation of stiffness and strength of cylindrical structures made of sandwich composite with facesheets made from glass fibre and polyvinylester resin and a core made from recycled paper hexagonal honeycomb impregnated with polyvinylester resin was deduced. Using this methodology, the finite element method and an experimentally validated model of an annular section of a hollow cylinder the optimal geometrical arrangement of stiffness elements which ensures the stiffness and strength properties with the largest efficiency of fibre reinforced plastic volume usage was determined.
Fibers and Polymers, 2019
The present study investigates the effect of fabrication techniques on the mechanical and thermo-mechanical behavior of bi-directional woven glass fiber epoxy composite for wind turbine blade application. The composites are fabricated by Vacuum Assisted Resin Transfer Molding (VARTM) and hand lay-up molding (HLM) techniques to identify the optimal performance output. The physical, mechanical and thermo-mechanical properties of the composites are evaluated for the samples fabricated by both the tecniques. It is observed that tensile strength, inter-laminar shear strength (ILSS) and flexural strength of the composites fabricated by VARTM technique are 405.62 MPa, 23.35 MPa and 239.3878 MPa respectively whereas composites fabricated by HLM technique shows slightly lower tensile strength (351.28 MPa), ILSS (16.75 MPa) and flexural strength (221.92 MPa). The intra-laminar mode-I fracture toughness test is also performed using compact tension specimen. The critical stress intensity factor (K I C) and critical strain energy release rate (G I C) are observed to be higher for VARTM composites. At the end, the dynamic mechanical analysis is performed to understand the material behavior and structural characteristics of these composites in high-temperature environment. This investigation purely governs the small-scale wind turbine blade structure in two different extreme climates from ambient to sustainable temperature.
IJTRET, 2022
Composite materials play an important role in many industrial applications. Researchers around the world are working to create new composites to improve the usefulness of these materials. GRP (Fiberglass Reinforced Polymer) is a composite material made from a fiberglass reinforced polymer matrix. They have better stiffness, strength, electrical conductivity, low coefficient of thermal expansion, excellent fatigue resistance, and the ability to produce materials of complex shapes. I am. In this study, different layers of different types of fiberglass cloth are used to manually manufacture fiberglass reinforced polymer hollow cylinder components and test the torsional and compressive strength of the sample. There are various fiberglass fabrics such as veil mats and textiles. Analysis is performed on the different types of samples generated to see if they are suitable for different applications. The results of the study show the effect of different layers of fiberglass on their strength and the possibility of replacing the weakly transmitting metal shaft with a composite shaft (GRP).
Analysis of Tubular Composite Cylindrical Shells
Fracture of Nano and Engineering Materials and Structures
In this paper, tubular composite cylindrical shells with different geometries are analyzed. The aim of this research is to investigate the behavior of the previously mentioned cylindrical shells, under different load ratio and different winding angles. The problem was solved using the classical theory of composite laminated shells and finite element methods. A fiber glass filament wounded thin composite cylindrical shell is used for study. Vessel is investigated under various meridians to axial load ratio. Also in each load condition filament winding angle is being varied. Based on classic theory of composite laminated shells, on-axis and off-axis stresses and strains of each ply is determined. A Tsai-Wu failure criterion is used as design limit. It is assumed that layers are completely bounded to each other and there is no sliding between two conjunction layers. Comparing the results of analytical method and finite element method shows the reliability of procedure. Based on the results, by increasing the ratio of (k), minimum of Tsai-Wu failure criterion leads to the small winding angles. So the fibers align according to maximum stress and make structures more efficient.
ijapm.org
A study on a Circular cylindrical thin-walled shell failure made of GRP composite subjected to static internal and external pressure was carried out. The results were acquired using analytical and FEM simulation approaches for various volumetric fiber fractions. Fiber breakage, matrix breakage, interlaminate shear deformation, delamination shear deformation and micro buckling failure were investigated employing maximum failure criteria against internal and external pressure. One-ply cylindrical shell with fiber angle orientation of 0 degree was modeled in ABAQUS finite element simulation and the result was varied using analytical approaches. Moreover, the pressure fluctuations for various volumetric fiber fraction were quadratic according to plotted graphs. Meanwhile, MATLAB software was used for theoretical analysis. The comparison of two approaches was proved to be accurate. Subsequently, failure strength of various laminated GFRP cylindrical shell with different fiber angle orientations at each ply was studied for diverse volumetric fiber fraction factors. Stacking sequence, fiber angle orientations were mainly effective on failure strength.
A Study on Effect of Filler on Mechanical Properties of GFRP Composites
2015
Fiber reinforced plastics are been used for this specific properties and advantages such as weight to strength ratio, tailoring design properties and ease of manufacturing. The complex material behaviour of GFRP composites depends on the properties of the building materials used for. Along with the fiber, reinforcement and voids the addition of the filler would affect the mechanical properties of the composite. The present study is focused on studying the effect of filler material on the mechanical properties of the GFRP composites. Glass/Polyester laminates with different size of fillers (in μmm) and with different weight proportions are prepared for the study. Glass particulates with 106 μmm and 125 μmm are prepared using a ball-mill. Compression molding technique is used to prepare the samples and where subjected to uniaxial tension and bending test. An attempt to study inter-laminar shear behaviour for the laminates with different filler size was also done. The test results show...
Strength Analysis of Various Kinds of Composite Material By Experimentation
— Composite materials are made of two or more constituent materials with significantly different physical or chemical properties, that when combined, produce a material with characteristics different from individual components. In this research a natural fiber and hybrid composite which has two or more than two different reinforcement fibers inside the matrix. The interest in natural fibers was generated due to the high material, processing cost, toxicity and specific gravity of the synthetic fibers. In this research the Areca nut coir, Coconut coir & Baggase fibers are extracted by water retting and mechanical method. The fibers are treated with alkali solution (NaOH). Then the glass mould of dimension 200×150×3mm is prepared. Fabrication is done by hand lay-up method. Fabrication is carried out for different composition of natural fiber and synthetic fiber (glass) by reinforcing in epoxy matrix. The tests were carried out according to the ASTM standards to determine mechanical properties of the fabricated specimens.
Stress Analysis of FRP Composite Cylinder with Closed Ends
IOSR Journal of Mechanical and Civil Engineering, 2013
Composite cylinders made of a polymer matrix such as epoxy reinforced with glass or carbon fibers possess extremely high strength. Proper modeling of FRP composite cylinder is very essential for many applications. FRP composite cylinders are commonly used in the aerospace, automotive, marine and construction industries. The present work is to study the variation of stressesat the top end, middle and bottom end portions of a composite cylinder by varying the diameter to thickness ratio(S) and fiber angle (θ).The four layered angle ply (θ 0 /-θ 0 /-θ 0 /θ 0) composite cylinder is considered forthe present work and behavior of each portion (Top end, middle and Bottom end) is studied.For the present work composite cylinder is modeled in ANSYS and analysis was carried out using numerical software. It isfound thatthe increment of stress takes place linearly with respect to D/t ratio due to reduction in thickness of the layer.The critical fiber angle is 45⁰ to 60⁰ as it offers high resistance against axial and circumferential deformation in middle and end portions.