Ultimate elastic wall stress (UEWS) test of glass fibre reinforced epoxy (GRE) pipe

This paper presents the stress-strain response and general lifetime damage modelling of glass fibre reinforced epoxy (GRE) composite pipes subjected to multi-ratios stress loadings at room temperature (RT). This particular modelling work was developed to predict the non-linear stressstrain response caused by the fatigue static and cyclic loading in the multiaxial ultimate elastic wall stress (UEWS) tests by considering the effects of matrix cracking within the laminates. Although the UEWS procedure is not a standard protocol used for qualification of GRE pipes, it appears to offer an option to existing procedures delineated in ASTM D2992. The ply properties initially expressed as a function of crack density was computed as a function of increasing stress and strain using shear lag approximation. In general lifetime damage model, the effects of stress developed in each ply from ultimate elastic wall stress (UEWS) test were expressed in a single quadratic term of axial and hoop stress. The term then solved to produce limits with respect to axial and hoop stress, which represented in a graphical form of failure envelope. The predictions from both models are found to be in good agreement with the data from the multiaxial UEWS tests of ¡55u filament wound GRE pipes. These models thus enable for the long term performance prediction of the pipes under combined loadings.

show abstract

“…This is because; in this type of loading the load is very much dominated by the epoxy matrixes as reported by previous study. 5, 10, 26, 29, 30…”

Section: Resultsmentioning

confidence: 99%

“…This non-linearity in the stress–strain relationship is used to indicate the UEWS point which corresponds to first ply failure in the pipe. Further details on the UEWS test procedure and the calculations involved are given in recent paper by Abdul Majid et al 26, 9…”

Section: Ultimate Elastic Wall Stress (Uews) Testmentioning

confidence: 99%

Strain response and damage modelling of glass/epoxy pipes under various stress ratios

Majid

Gibson

Hekman

et al. 2014

Plastics, Rubber and Composites

Self Cite

View full text Add to dashboard Cite

show abstract

“…To date, the failure behaviour of filament-wound GRE composite pipes subjected to impact loading [9,10] and several uniaxial and biaxial loadings [11][12][13][14] have been the subject of research both numerically and experimentally by some authors. Among others, Wakayama et al [15] performed impact tests with impactor nose radii of 3, 10, and 20 mm and subsequent internal pressure tests on carbon fibre reinforced epoxy composite pipes.…”

Section: Introductionmentioning

confidence: 99%

Burst strength and impact behaviour of hydrothermally aged glass fibre/epoxy composite pipes

et al. 2016

Self Cite

View full text Add to dashboard Cite

“…[14] Yoon and Oh [15] evaluated experimentally the long-term behavior of filament wound composites pipes up to 10,000 h under internal pressure. The mechanical behavior of composites exposed to internal pressure at different temperatures up to 95 C was experimentally studied by Majid et al [16][17][18][19][20] As a substitute test method for the long-term test with duration of 10,000-h, a short-term test plan (10 one-minute tests) was developed which is known as ultimate elastic wall stress. Long-term creep test on industrial-scale filament wound composites pipes subjected to internal pressure was simulated by Rafiee and Mazhari.…”

mentioning

confidence: 99%

Investigating long‐term creep in a composite pipe subjected to transverse loading and aqueous condition

Rafiee,

Arabian

2023

Polymer Composites

View full text Add to dashboard Cite

Glass‐fiber reinforced‐polymer (GFRP) pipes are widely used in various applications under wet conditions. Despite the considerable efforts on characterizing the mechanical response of GFRP pipes from various viewpoints in dry condition, less attention has been given to the influence of moisture absorption on their performance. The main goal of this research is to investigate the influence of moisture absorption on the long‐term creep behavior of GFRP pipes experimentally and theoretically. As experimental program, a GFRP pipe is subjected to a constant compressive transverse loading while it is submerged in water. Thus, the interaction between creep and water absorption are studied up to 5000 h. A systematic modeling procedure is also developed to evaluate the long‐term wet‐creep response of the GFRP pipes. Two scales of micro and macro are linked through an explicit modeling procedure. An excellent agreement is observed between experimental observations and outputs of the developed modeling procedure. Highlights A process is developed to model long‐term creep in composites under wet condition. Long‐term creep is predicted based on short‐term creep behavior of pure resin. Long‐term creep on immersed pipe in water under the transverse loading is simulated. Updating constitutive equations, nonlinear viscoelastic behavior is estimated. The effect of moisture absorption on the long‐term creep behavior is investigated.

show abstract

Ultimate elastic wall stress (UEWS) test of glass fibre reinforced epoxy (GRE) pipe

Cited by 50 publications

References 12 publications

Strain response and damage modelling of glass/epoxy pipes under various stress ratios

Strain response and damage modelling of glass/epoxy pipes under various stress ratios

Burst strength and impact behaviour of hydrothermally aged glass fibre/epoxy composite pipes

Investigating long‐term creep in a composite pipe subjected to transverse loading and aqueous condition

Contact Info

Product

Resources

About