A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Numerical analysis and optimization of CFRP buckle arrestors in subsea pipelines
https://orcid.org/0000-0003-0259-9558
Abstract This research investigates the collapse mechanisms and crossover pressure capacity of carbon fiber-reinforced polymer (CFRP) buckle arrestors in subsea pipelines. A nonlinear three-dimensional finite element (FE) model was formulated using ANSYS framework, incorporating a nonlinear geometric algorithm to simulate the collapse and crossover failures. The study underscored a good agreement between the FE model predictions, experimental observations done by the author, and previous research outcomes. Two principal crossover modes; flattening and U-shape modes were identified, though initiated similarly, differ in progression, attributed to the arrestor's attributes. The arrestor thickness ratio (h/t) emerged as a significant determinant of arresting efficiency, particularly impactful when h/t ≥ 1.5. An inverse relationship between σ yp /σ uc and P X /P P was identified. Furthermore, specific geometric parameters, like h/t and L/D, delineate the predominant crossover mode. Finally, new empirical expressions including the geometric and material parameters are proposed to predict the crossover pressure (P X) for each crossover mode, separately. Also, the findings suggest that CFRP arrestors, especially those with configurations of L = 1.5D and h = 3t, can offer optimum resilience to external pressure.
Highlights Collapse mechanisms and crossover pressure in CFRP arrestors were investigated. Applied validated 3D FE model for parametric study and stress analysis. Optimized CFRP arrestor parameters and characteristics are presented. Validated expressions with prior experimental results and identified failure modes. Substantial enhancement in subsea pipeline crossover pressure with CFRP arrestors.
Numerical analysis and optimization of CFRP buckle arrestors in subsea pipelines
https://orcid.org/0000-0003-0259-9558
Abstract This research investigates the collapse mechanisms and crossover pressure capacity of carbon fiber-reinforced polymer (CFRP) buckle arrestors in subsea pipelines. A nonlinear three-dimensional finite element (FE) model was formulated using ANSYS framework, incorporating a nonlinear geometric algorithm to simulate the collapse and crossover failures. The study underscored a good agreement between the FE model predictions, experimental observations done by the author, and previous research outcomes. Two principal crossover modes; flattening and U-shape modes were identified, though initiated similarly, differ in progression, attributed to the arrestor's attributes. The arrestor thickness ratio (h/t) emerged as a significant determinant of arresting efficiency, particularly impactful when h/t ≥ 1.5. An inverse relationship between σ yp /σ uc and P X /P P was identified. Furthermore, specific geometric parameters, like h/t and L/D, delineate the predominant crossover mode. Finally, new empirical expressions including the geometric and material parameters are proposed to predict the crossover pressure (P X) for each crossover mode, separately. Also, the findings suggest that CFRP arrestors, especially those with configurations of L = 1.5D and h = 3t, can offer optimum resilience to external pressure.
Highlights Collapse mechanisms and crossover pressure in CFRP arrestors were investigated. Applied validated 3D FE model for parametric study and stress analysis. Optimized CFRP arrestor parameters and characteristics are presented. Validated expressions with prior experimental results and identified failure modes. Substantial enhancement in subsea pipeline crossover pressure with CFRP arrestors.
Numerical analysis and optimization of CFRP buckle arrestors in subsea pipelines
https://orcid.org/0000-0003-0259-9558
Abstract This research investigates the collapse mechanisms and crossover pressure capacity of carbon fiber-reinforced polymer (CFRP) buckle arrestors in subsea pipelines. A nonlinear three-dimensional finite element (FE) model was formulated using ANSYS framework, incorporating a nonlinear geometric algorithm to simulate the collapse and crossover failures. The study underscored a good agreement between the FE model predictions, experimental observations done by the author, and previous research outcomes. Two principal crossover modes; flattening and U-shape modes were identified, though initiated similarly, differ in progression, attributed to the arrestor's attributes. The arrestor thickness ratio (h/t) emerged as a significant determinant of arresting efficiency, particularly impactful when h/t ≥ 1.5. An inverse relationship between σ yp /σ uc and P X /P P was identified. Furthermore, specific geometric parameters, like h/t and L/D, delineate the predominant crossover mode. Finally, new empirical expressions including the geometric and material parameters are proposed to predict the crossover pressure (P X) for each crossover mode, separately. Also, the findings suggest that CFRP arrestors, especially those with configurations of L = 1.5D and h = 3t, can offer optimum resilience to external pressure.
Highlights Collapse mechanisms and crossover pressure in CFRP arrestors were investigated. Applied validated 3D FE model for parametric study and stress analysis. Optimized CFRP arrestor parameters and characteristics are presented. Validated expressions with prior experimental results and identified failure modes. Substantial enhancement in subsea pipeline crossover pressure with CFRP arrestors.
Numerical analysis and optimization of CFRP buckle arrestors in subsea pipelines
Alrsai, Mahmoud (author)
Marine Structures ; 94
2024-01-02
Article (Journal)
Electronic Resource
English
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