The effect of stress ratio on the fracture morphology of filament wound composite tubes

Martins, L.A.L.; Bastian, Fernando Luíz; Netto, Theodoro Antoun

doi:10.1016/j.matdes.2013.01.026

Cited by 40 publications

(19 citation statements)

References 15 publications

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“…The study to define the minimum length of the tubes was important to validate the hydrostatic tests performed in the experimental work [25,26]. The tubes in these hydrostatic tests had a length of 1100 mm (L/D = 11).…”

Section: Discussionmentioning

confidence: 99%

“…Modeled glass fiber reinforced polymer (GFRP) tubes were fabricated using the filament winding process and cured inside an oven according to the recommended cure schedule (2 h/ 80°C + 2 h/120°C) [25,26]. The length and internal radius of the tubes are given in Fig.…”

Section: Materials and Mechanical Propertiesmentioning

confidence: 99%

“…The numerical models used in these parametric studies were validated with burst tests of composite tubes performed in a pressurizing system according to previous works [25,26]. In the same way, convergence analysis was performed to select the meshes used and to decrease the computational costs.…”

Section: Finite Element Modelsmentioning

confidence: 99%

“…In this way the problem was reduced to an eighth of its original. Moreover, in order to induce progressive failure, the meshes had a gradual change in thickness near the plane of symmetry following the thickness mapping from previous studies [25,26]. Typical boundary conditions used in the analyses of the tubes are illustrated in Fig.…”

Section: Finite Element Modelsmentioning

confidence: 99%

“…With this technique the damage variables calculated from the aforementioned damage evolution equations are not used directly; instead, the damage variables are ''regularized'' via the following equations: [25,26]. For open-end condition, the viscosity value of 0.03 was assumed because no hydrostatic tests were made for calibration of the models and because of the similarity between restrained and open-end condition.…”

Section: User Subroutine (Umat)mentioning

confidence: 99%

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Reviewing some design issues for filament wound composite tubes

2014

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Section: Discussionmentioning

confidence: 99%

Section: Materials and Mechanical Propertiesmentioning

confidence: 99%

Section: Finite Element Modelsmentioning

confidence: 99%

Section: Finite Element Modelsmentioning

confidence: 99%

Section: User Subroutine (Umat)mentioning

confidence: 99%

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Reviewing some design issues for filament wound composite tubes

2014

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An analytical model for the progressive failure prediction of reinforced thermoplastic pipes under axial compression

Liu

Wang

et al. 2021

Polymer Composites

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An analytical model is presented to predict the progressive failure of reinforced thermoplastic pipes (RTPs) under axial compression, in which the existing homogenization method and a nonlinear stiffness degradation model are combined to predict the continuum damage mechanical response in an iterative and cyclic way. As the homogenization method ignores the effect of the cross‐sectional curvature on the damage sequence, a stress correction factor is defined to consider this effect. Once corrected stresses satisfy Hashin‐Yeh failure criteria, the nonlinear stiffness degradation model is adopted to update the constitutive relationship established by the homogenization method. The proposed model is capable of identifying the damage location and failure mode, analyzing damage accumulation and predicting the ultimate compression. Meanwhile, ABAQUS Explicit quasi‐static analyses calling a user‐defined subroutine were conducted to capture the progressive failure mechanisms in 3D composites and verify the proposed model. The proposed model was found to give accurate prediction on the elastic stiffness, first ply failure, the damaged stiffness, the ultimate compression, and stress distributions. Furthermore, the effects of fiber's winding angles and the thickness‐radius ratios have been discussed, which illustrate that tensile failure mode would appear even when RTPs are under axial compression.

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Experimental and numerical study on the dry/wet burst failure of reinforced thermoplastic pipes

et al. 2023

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This paper investigates the burst failure of reinforced thermoplastic pipes (RTPs) via combined experimental and numerical research. Two completely different burst forms appeared during the experiments. The dry burst form occurs with matrix cracks, fiber breakage and crack of liner and coating, which is a common burst morphology. A new burst morphology, which is never reported in open literature, is observed in the experiments. This burst morphology, defined as wet burst form, presents a long dent in the coating and invisible composite damage. In order to simulate the burst failure of RTPs, a numerical model was proposed, in which element removal criteria and the nonlinear stiffness degradation model based on Hashin‐Yeh failure criterion were employed to conduct progressive failure analysis on 3D composites. It was found that the wet burst form has lower burst pressure and causes larger damaged area, which is more dangerous in engineering. For the damage propagation, progressive failure occurs on middle composites and induces the final burst when the dry burst form occurs. As for the wet burst form, water flows into the middle of RTPs, which causes the delamination, matrix crack and bulge of coating. During the process, fibers play few roles in bearing loads.Highlights The wet burst form of reinforced thermoplastic pipes is firstly observed. Element removal criteria and nonlinear stiffness degradation model were used to simulate the burst failure. The numerical model has a good performance on predicting the burst pressure and damage propagation of composites. The wet burst form has lower burst pressure compared with the dry burst form. Fiber and matrix tensile failure mode are dominant.

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The effect of stress ratio on the fracture morphology of filament wound composite tubes

Cited by 40 publications

References 15 publications

Reviewing some design issues for filament wound composite tubes

Reviewing some design issues for filament wound composite tubes

An analytical model for the progressive failure prediction of reinforced thermoplastic pipes under axial compression

Experimental and numerical study on the dry/wet burst failure of reinforced thermoplastic pipes

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