Performance of glass fibre reinforced epoxy (GRE) composite pipes under various stress ratios, winding angles and ageing conditions

Glass Fibre Reinforced Epoxy (GRE) composite tubes have wider application in oil and gas industry due to their durability and strength. An extensive qualification program is required to determine the performance of the pipes concerning pressure, temperature, chemical resistance, fire performance, el...

Full description

Saved in:

Bibliographic Details
Format:	Thesis
Language:	English
Subjects:	Glass fibre reinforced epoxy (GRE) Composites Composite tubes
Online Access:	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/72283/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/72283/2/Full%20text.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-unimap-72283
record_format	uketd_dc
spelling	my-unimap-722832021-09-30T04:31:11Z Performance of glass fibre reinforced epoxy (GRE) composite pipes under various stress ratios, winding angles and ageing conditions Mohd Shukri, Abdul Majid, Assoc. Ir. Dr. Glass Fibre Reinforced Epoxy (GRE) composite tubes have wider application in oil and gas industry due to their durability and strength. An extensive qualification program is required to determine the performance of the pipes concerning pressure, temperature, chemical resistance, fire performance, electrostatic performance, impact, and compression. ISO 14692 qualifies GRE pipes based on regression analysis from a long term test. This conventional test procedure requires 14 months to estimate the remaining properties at the end of expected life (20-50 years). The composite pipe manufacturers certainly require a more efficient yet reliable short-term test. A new portable automated pressure test rig is developed to achieve the five multiaxial stress ratios: pure axial 0H:1A, hoop to axial 1H:1A, pure hydrostatic 2H:1A, quad hoop to axial 4H:1A, and pure hoop 1H: 0A loading. The test rig serves as an alternative to the existing short-term test procedure, specified in ASTM D2992. A test method is developed based on the ultimate elastic wall stress (UEWS) concept. UEWS test internally pressurises the pipes, holds and releases the pressure based on the set value one cycle. Ten such cycles form one cycle group at a constant pressure level. The procedure is continued at increased pressure levels until the pipe shows weepage. A LabVIEW program is developed to accomplish the UEWS test and runs on the Touch Panel Computer. NI compactRIO and NI modules read the pressure values, measure strain gauge readings and control the opening and closing of the solenoid valves. Hoop and axial strain measurements are acquired during the test. First ply failure points are estimated from the captured strain values. The failure envelope is constructed based on the first ply failure points. The effects of winding angles are studied by subjecting pipes with winding angles [±45°]4, [±55°]4, and [±63°]4. The results of the UEWS tests indicate that each winding angle dominate a certain optimum stress ratio namely, [±45°]4 for axial dominated loadings (1H:1A and 0H:1A); [±55°]4 excel at pure hydrostatic loading (2H:1A), while [±63°]4 show domination along the quad hoop to axial 4H:1A and 1H:0A stress ratios. To study the effects of ageing, the pipes are hydrothermally aged and are subjected to UEWS tests. The results show for the aged pipes show a considerable degradation of strength compared to the results of the virgin pipes due to moisture absorption. Several failure modes namely transverse matrix cracking, white striations, weepage, fibre breakage, ring formation were observed during the UEWS tests Universiti Malaysia Perlis (UniMAP) Thesis en http://dspace.unimap.edu.my:80/xmlui/handle/123456789/72283 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/72283/3/license.txt 8a4605be74aa9ea9d79846c1fba20a33 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/72283/1/Page%201-24.pdf 892062b273b44e092fef37460b2a43f6 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/72283/2/Full%20text.pdf 4d09f746dd90568957e2c6aafaff25d3 Universiti Malaysia Perlis (UniMAP) Glass fibre reinforced epoxy (GRE) Composites Composite tubes School of Mechatronic Engineering
institution	Universiti Malaysia Perlis
collection	UniMAP Institutional Repository
language	English
advisor	Mohd Shukri, Abdul Majid, Assoc. Ir. Dr.
topic	Glass fibre reinforced epoxy (GRE) Composites Composite tubes
spellingShingle	Glass fibre reinforced epoxy (GRE) Composites Composite tubes Performance of glass fibre reinforced epoxy (GRE) composite pipes under various stress ratios, winding angles and ageing conditions
description	Glass Fibre Reinforced Epoxy (GRE) composite tubes have wider application in oil and gas industry due to their durability and strength. An extensive qualification program is required to determine the performance of the pipes concerning pressure, temperature, chemical resistance, fire performance, electrostatic performance, impact, and compression. ISO 14692 qualifies GRE pipes based on regression analysis from a long term test. This conventional test procedure requires 14 months to estimate the remaining properties at the end of expected life (20-50 years). The composite pipe manufacturers certainly require a more efficient yet reliable short-term test. A new portable automated pressure test rig is developed to achieve the five multiaxial stress ratios: pure axial 0H:1A, hoop to axial 1H:1A, pure hydrostatic 2H:1A, quad hoop to axial 4H:1A, and pure hoop 1H: 0A loading. The test rig serves as an alternative to the existing short-term test procedure, specified in ASTM D2992. A test method is developed based on the ultimate elastic wall stress (UEWS) concept. UEWS test internally pressurises the pipes, holds and releases the pressure based on the set value one cycle. Ten such cycles form one cycle group at a constant pressure level. The procedure is continued at increased pressure levels until the pipe shows weepage. A LabVIEW program is developed to accomplish the UEWS test and runs on the Touch Panel Computer. NI compactRIO and NI modules read the pressure values, measure strain gauge readings and control the opening and closing of the solenoid valves. Hoop and axial strain measurements are acquired during the test. First ply failure points are estimated from the captured strain values. The failure envelope is constructed based on the first ply failure points. The effects of winding angles are studied by subjecting pipes with winding angles [±45°]4, [±55°]4, and [±63°]4. The results of the UEWS tests indicate that each winding angle dominate a certain optimum stress ratio namely, [±45°]4 for axial dominated loadings (1H:1A and 0H:1A); [±55°]4 excel at pure hydrostatic loading (2H:1A), while [±63°]4 show domination along the quad hoop to axial 4H:1A and 1H:0A stress ratios. To study the effects of ageing, the pipes are hydrothermally aged and are subjected to UEWS tests. The results show for the aged pipes show a considerable degradation of strength compared to the results of the virgin pipes due to moisture absorption. Several failure modes namely transverse matrix cracking, white striations, weepage, fibre breakage, ring formation were observed during the UEWS tests
format	Thesis
title	Performance of glass fibre reinforced epoxy (GRE) composite pipes under various stress ratios, winding angles and ageing conditions
title_short	Performance of glass fibre reinforced epoxy (GRE) composite pipes under various stress ratios, winding angles and ageing conditions
title_full	Performance of glass fibre reinforced epoxy (GRE) composite pipes under various stress ratios, winding angles and ageing conditions
title_fullStr	Performance of glass fibre reinforced epoxy (GRE) composite pipes under various stress ratios, winding angles and ageing conditions
title_full_unstemmed	Performance of glass fibre reinforced epoxy (GRE) composite pipes under various stress ratios, winding angles and ageing conditions
title_sort	performance of glass fibre reinforced epoxy (gre) composite pipes under various stress ratios, winding angles and ageing conditions
granting_institution	Universiti Malaysia Perlis (UniMAP)
granting_department	School of Mechatronic Engineering
url	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/72283/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/72283/2/Full%20text.pdf
_version_	1747836863409815552

Performance of glass fibre reinforced epoxy (GRE) composite pipes under various stress ratios, winding angles and ageing conditions

Similar Items