Fracture of glass-reinforced plastic pipes of mixed wall construction under pressure loading

1997 ◽  
Vol 211 (4) ◽  
pp. 223-246 ◽  
Author(s):  
R Kitching ◽  
D R Hose ◽  
R Priestner ◽  
S H Hashemizadeh
Keyword(s):  
Polyester Resin ◽  
Resin Matrix ◽  
Hydraulic Pressure ◽  
Design Codes ◽  
Pressure Loading ◽  
Fracture Patterns ◽  
Reinforced Plastic ◽  
Wall Construction ◽  
Chopped Strand Mat ◽  
Glass Reinforcement

Hand laid-up straight pipes of 250 mm inside pipe diameter, constructed from polyester resin matrix and E-glass reinforcement supplied in two different combinations of chopped strand mat (CSM) and woven rovings (WR) have been tested to destruction under internal hydraulic pressure. Results are compared with those from a similar pipe constructed from CSM only and one constructed by wrapping CSM layers on a PVC (polyvinyl chloride) liner. Failure pressures for the different constructions are compared with each other and with design pressures associated with two design codes. Features of the fracture patterns are noted, following an extensive microscopic examination of the straight pipes.

The influence of the variation in wall thickness of glass fibre reinforced plastic pipe bends subjected to in-plane bending

1992 ◽  
Vol 27 (2) ◽  
pp. 113-121 ◽  
Author(s):  
R Kitching ◽  
D R Hose
Keyword(s):  
Constant Thickness ◽  
Reinforced Plastic ◽  
Process Plant ◽  
Glass Fibre Reinforced Plastic ◽  
Glass Fibre Reinforced ◽  
Plane Bending ◽  
Chopped Strand Mat ◽  
Thickness Variations ◽  
Glass Reinforcement ◽  
Fourier Series Analysis

Glass reinforced plastic (GRP) pipe bends as used in the process plant industry are often made by hand lay-up and, because of overlapping of layers in the construction, are prone to thickness variations sometimes approaching ± 50 percent of the mean thickness. An existing Fourier series analysis for calculating flexibility factors and strain distributions in such components with constant thickness subjected to in-plane bending moments is extended to include typical thickness variations. Results are expressed in closed form, and their practical implications are discussed. The theoretical results are also discussed in relation to experiments on two GRP pipe bends having nominal inside pipe diameters of 250mm and mean pipe radii of 250mm where the resin was polyester and the E-glass reinforcement consisted of three layers of 0.6 kg m−2 chopped strand mat and one layer of 0.6kg m−2 woven rovings.

scholarly journals Experimental Investigation on Vibration Responses of Fiberglass Reinforced Plastic

2021 ◽  
Vol 10 (4) ◽  
pp. 25316-25320
Author(s):  
Nanang Endriatno
Keyword(s):  
Fiber Orientation ◽  
Composite Beam ◽  
Polyester Resin ◽  
Composite Beams ◽  
Resin Matrix ◽  
Vibration Displacement ◽  
Maximum Value ◽  
Reinforced Plastic ◽  
Resin Matrix Composite ◽  
Vibration Responses

The purpose of this study is to analyze the vibration displacement on fiberglass reinforced plastic beams with variations a number of fibers in the resin matrix. Composite beams was made of fiberglass and polyester resin matrix with a number of fiberglass: 0, 24, and 48. Composite beams was manufactured by hand lay-up method with the unidirectional fiber orientation. The composite beams used have the dimension of length: 500 mm, height: 20 mm, and width: 20 mm. During the experimental test, the beam was vibrated using an exciter motor which was placed at the end of the cantilever support then using a vibration meter, the vibration displacement data (mm) was measured by placing the vibration transducer postions : 50 mm, 250 mm, and 450 mm from the cantilever support. During the vibration test, the vibration displacement data on the vibration meter screen were recorded using a camera recorder and the data was taken 6 times at each of measurement points. The experimental and analysis results show that the value of vibration displacement (mm) decreases when the fiberglass is added to the composite beam, or in other words, the addition of fiberglass provides an increase in the ability of the beam to withstand vibrations. The maximum vibration displacement value on composites with 0 fiberglass: 0.641 mm, then the vibration displacement decreased in composites with 24 fiberglass: 0.506 mm and the lowest displacement value for the composites with 48 fiberglass: 0.395 mm. Whereas for 3 measurement points at positions 5 cm, 25 cm, and 45 cm along the beam for three kind of the composites, the maximum value of vibration displacement value was obtained at the end of beam composites or at 45 cm from cantilever support: 0.735 mm on composite beam with 0 fiberglass and minimum at position 5 cm near the cantilever support with the value of vibration displacement: 0.323 mm on composite beam with 48 fiberglass.

Physical and mechanical properties of unsaturated polyester resin matrix from recycled PET (based PG ) with corn straw fiber

2021 ◽  
pp. 51305
Author(s):  
Nora Abigail Wilson García ◽  
Jorge Luis Almaral Sánchez ◽  
Ramón Álvaro Vargas Ortiz ◽  
Abel Hurtado Macías ◽  
Nelly Flores Ramírez ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Physical And Mechanical Properties ◽  
Unsaturated Polyester Resin ◽  
Resin Matrix ◽  
Corn Straw ◽  
Recycled Pet

Quasi-Static Indentation Behaviour of Glass Fibre Reinforced Polymer

2014 ◽  
Vol 970 ◽  
pp. 317-319 ◽  
Author(s):  
Syed Mohd Saiful Azwan ◽  
Yahya Mohd Yazid ◽  
Ayob Amran ◽  
Behzad Abdi
Keyword(s):  
Glass Fibre ◽  
Polyester Resin ◽  
Loading Rates ◽  
Reinforced Polymer ◽  
Glass Fibre Reinforced Polymer ◽  
Static Indentation ◽  
Indentation Tests ◽  
Fibre Reinforced Polymer ◽  
Glass Fibre Reinforced ◽  
Chopped Strand Mat

Fibre reinforced polymer (FRP) plates subject to quasi-static indentation loading were studied. The plates were fabricated from three layers of chopped strand mat glass fibre and polyester resin using vacuum infusion process. Indentation tests were conducted on the plates with loading rates of 1 mm/min, 10 mm/min, 100 mm/min and 500 mm/min using a hemispherical tip indenter with diameter 12.5 mm. The plates were clamped in a square fixture with an unsupported space of 100 mm × 100 mm. The loads and deflections at the indented location were measured to give energy absorption-deflection curves. The results showed that the loading rate has a large effect on the indentation behaviour and energy absorbed.

Analisa Kekuatan Bahan Komposit Yang Diperkuat Serat Bambu Menggunakan Resin Polyester Dengan Memvariasikan Susunan Serat Secara Acak Dan Lurus Memanjang

2020 ◽  
Vol 2 (1) ◽  
pp. 28-35
Author(s):  
Rokki Manurung ◽  
Sutan Simanjuntak ◽  
Jesayas Sembiring ◽  
Richard A.M. Napitupulu ◽  
Suriady Sihombing
Keyword(s):  
Polymer Composites ◽  
Polyester Resin ◽  
Natural Fibers ◽  
Resin Matrix ◽  
Strength Increase ◽  
Test Results ◽  
The Matrix ◽  
Bamboo Fibers ◽  
Reinforcing Material

Composites are materials which are mixed with one or more different and heterogeneous reinforcement. Matrix materials can generally be polymers, ceramics and metals. The matrix in the composite serves to distribute the load into all reinforcing material. Matrix properties are usually ductile. The reinforcing material in the composite has the role of holding the load received by the composite material. The nature of the reinforcing material is usually rigid and tough. Strengthening materials commonly used so far are carbon fiber, glass fiber, ceramics. The use of natural fibers as a type of fiber that has advantages began to be applied as a reinforcing material in polymer composites. This study seeks to see the effect of the use of bamboo natural fibers in polyester resin matrix on the strength of polymer composites with random and straight lengthwise fiber variations. From the tensile test results it can be seen that bamboo fibers can increase the strength of polymer composites made from polyester resin and the position of the longitudinal fibers gives a significantly more strength increase than random fibers.

Failure of GRP Pipe Bends Under Out-of-Plane Flexure with and Without Pressure

1993 ◽  
Vol 207 (2) ◽  
pp. 133-141
Author(s):  
R Kitching ◽  
P Myler
Keyword(s):  
Internal Pressure ◽  
Polyester Resin ◽  
Design Procedure ◽  
Out Of Plane ◽  
Failure Loads ◽  
Smooth Pipe ◽  
Plane Bending ◽  
Chopped Strand Mat ◽  
Plane Flexure

Tests to failure have been carried out on six smooth pipe bends constructed by hand lay-up from polyester resin and glass in the form of chopped strand mat. The failure loads under out-of-plane bending only are compared with those where this type of loading is combined with internal pressure. The results are discussed in relation to the design procedure adopted in BS 7159: 1989.

scholarly journals Composite materials reinforced with ceramic waste and matrix of unsaturated polyester for applications in the automotive industry

DYNA ◽  
2020 ◽  
Vol 87 (212) ◽  
pp. 251-258
Author(s):  
Jorge Antonio Velasco Parra ◽  
Bladimir A. Ramón Valencia ◽  
William Javier Mora Espinosa
Keyword(s):  
Composite Materials ◽  
Automotive Industry ◽  
Ceramic Industry ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Resin Matrix ◽  
The Finite Element Method ◽  
Bending Tests ◽  
Linear Behavior ◽  
Original Part

In the present investigation an alternative of recycling was evaluated for the residues derived from defective pieces of the ceramic industry, harnessing them as reinforcement in composite materials for the manufacture of parts used in the automotive sector. Sintered clay microparticles to 10% p/p were mixed in an unsaturated polyester resin matrix, through the cast molding technique. Bending tests were performed that showed an elastic-linear behavior, typical of a fragile material. The structure was analyzed through scanning electron microscopy, checking the fragile failure mechanism and a good dispersion of the microparticles. A simulation was carried out with the finite element method, for the design of a motorcycle brake lever, with results that demonstrate a better distribution of stresses and reduction in mass with respect to the original part. Finally, a prototype brake lever was manufactured using computationally validated geometry.

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