Azizul Mohamadhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/327992024-03-29T04:43:51Z2024-03-29T04:43:51ZThe interlaminar shear strength test of helical wound glass fibre reinforced epoxy laminates subjected to hydrothermal ageingMohd Shukry, Abdul Majid, Dr.Mohd Afendi, Rojan, Dr.Ruslizam, Daud, Dr.Nasrul Amri, Mohd Amin, Dr.Azizul, MohamadM. Hekmanhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/351202014-06-05T08:20:37Z2014-06-01T00:00:00ZThe interlaminar shear strength test of helical wound glass fibre reinforced epoxy laminates subjected to hydrothermal ageing
Mohd Shukry, Abdul Majid, Dr.; Mohd Afendi, Rojan, Dr.; Ruslizam, Daud, Dr.; Nasrul Amri, Mohd Amin, Dr.; Azizul, Mohamad; M. Hekman
This paper presents the experimental investigation of interlaminar shear strength (ILSS) tests of helical wound glass fibre reinforced epoxy (GRE) pipes subjected to hydrothermal ageing. Currently, the test is being used by composite pipes manufacturers as the alternative internal quality monitoring program for detection of manufacturing changes and reconfirmation of the design basis of composite pipes. The test specimens were cut in hoop direction from helically wound GRE composite pipes after exposure of 0, 250, 500, 1000-hour water at 80°C. The ILSS tests of the GRE samples were then conducted in accordance with ASTM D2344, and the results were analyzed to evaluate the durability performance of the laminates. The results show a clear degradation in the bonding strength between fibres and resin system interface after 500-1000-hour water exposure at 80°C. This findings show a good agreement in the trend observed with the standard qualification procedure elucidated in ASTM D2992 standard. Hence, ILSS test shows a great potential to be used as the internal short-term mechanical test method to qualify a new resin, curing agent or glass fibre in accordance to the next approach.
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2014-06-01T00:00:00ZEffect of nano-clay and their dispersion techniques on compressive properties of unsaturated polyester resinFartini, Mohd SuhutMohd Shukry, Abdul Majid, Dr.Mohd Afendi, Rojan, Dr.Ruslizam, Daud, Dr.Azizul, Mohamadhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/351042014-06-05T03:39:53Z2014-06-01T00:00:00ZEffect of nano-clay and their dispersion techniques on compressive properties of unsaturated polyester resin
Fartini, Mohd Suhut; Mohd Shukry, Abdul Majid, Dr.; Mohd Afendi, Rojan, Dr.; Ruslizam, Daud, Dr.; Azizul, Mohamad
This paper aims to understand the relationship between processing parameters and compressive properties of nanoclay filled polyester resin (dispersion method and wt% of nanoclay particles). Unsaturated polyester resin with 0-5 wt% nanoclay content was prepared by hand mixing and through shears mixing of water bath shaker. Static uniaxial compression tests were conducted to investigate how the unsaturated polyester resins with nanoclay contents and processing will effect on the compressive stress-strain behaviour and compression properties. The experimental results show that the compressive strength and elastic modulus of nanomodified resin are significantly affected by type of mixing methods to prepare the specimens and the ratio of nanoparticles content during mixing. It was found out that the compressive strength and compressive modulus increase with the nanoclay content. The findings also indicate the dispersion of nanoclay by hand-mixed method yield higher compressive strength compared to that dispersed by water shaker bath.
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2014-06-01T00:00:00ZEffects of elevated temperatures on the compression strength of nanoclay filled unsaturated polyester resinFartini, Mohd SuhutMohd Shukry, Abdul Majid, Dr.Mohd Afendi, Rojan, Dr.Nasrul Amri, Mohd Amin, Dr.Azizul, Mohamadhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/351002014-06-05T03:08:10Z2014-06-01T00:00:00ZEffects of elevated temperatures on the compression strength of nanoclay filled unsaturated polyester resin
Fartini, Mohd Suhut; Mohd Shukry, Abdul Majid, Dr.; Mohd Afendi, Rojan, Dr.; Nasrul Amri, Mohd Amin, Dr.; Azizul, Mohamad
The paper describes the effects of the montmorillonite (MMT) fillers commonly known as nanoclay, on the compression properties of unsaturated polyester resins at different weight percentage of nanoclay. Modified resin specimens with 1, 3 and 5 wt. % of nanoclay contents were prepared and subjected to compressive tests according to ASTM D695. The static uniaxial compression testing were conducted at various temperatures ranging from room temperature (RT) to the temperature closer to its glass transition temperature Tg to study the effect of nanoclay fillers on the compressive stress-strain behaviour at high temperatures (room temperature, 35, 45, and 75°C). The mechanical properties of the nanomodified resin including the elastic modulus, maximum stress and failure strain were determined. The experimental results imply that adding these nanoclay fillers has enhanced the elastic modulus, compressive strength, and toughness without sacrificing the strain to failure and thermal stability of the unsaturated polyester. However it was found that generally, all specimens showed degradation in compressive strength with increases in temperatures.
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2014-06-01T00:00:00ZModelling of multi-axial ultimate elastic wall stress (UEWS) test for glass fibre reinforced epoxy (GRE) composite pipesMohd Shukry, Abdul Majid, Dr.Mohd Afendi, Rojan, Dr.Ruslizam, Daud, Dr.Nasrul Amri, Mohd Amin, Dr.Azizul, MohamadCheng, Ee Meng, Dr.Gibson, A. G.http://dspace.unimap.edu.my:80/xmlui/handle/123456789/340962014-04-27T04:44:33Z2013-01-01T00:00:00ZModelling of multi-axial ultimate elastic wall stress (UEWS) test for glass fibre reinforced epoxy (GRE) composite pipes
Mohd Shukry, Abdul Majid, Dr.; Mohd Afendi, Rojan, Dr.; Ruslizam, Daud, Dr.; Nasrul Amri, Mohd Amin, Dr.; Azizul, Mohamad; Cheng, Ee Meng, Dr.; Gibson, A. G.
This paper describes the modeling of multiaxial ultimate elastic wall stress (UEWS) at room temperature for glass fibre reinforced epoxy (GRE) composite pipes. The model developed, predicts the stress-strain response caused by the combined, static and cyclic of UEWS loading taking into effects of transverse matrix cracking within the laminates. The procedure, although not a standard method, seems to provide a good alternative to the current raw materials' re-qualification procedure delineated in ISO 14692 through ASTM D2992. The effective transverse and shear modulus of the lamina due to increasing presence of transverse matrix cracking were estimated. Classical laminate analysis was then applied to compute the corresponding ply properties as a function of increasing stress and strain. The model shows a good agreement with the experimental results of multiaxial UEWS tests on ±55o filament wound glass-reinforced epoxy pipes.
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2013-01-01T00:00:00Z