Numerical Investigation into GFRP Composite Pipes under Hydrostatic Internal Pressure
Tamer Ali Sebeay1,2, Azzam Ahmed3,4
1Engineering Management Department, College of Engineering, Prince Sultan University, Riyadh 11586, Saudi Arabia.
Polymers
|March 11, 2023
Summary
Glass-fiber-reinforced plastic (GFRP) composite pipes exhibit excellent pressure resistance. Optimal winding angles between [±40] and [±55] degrees, along with appropriate thickness, significantly enhance the pipe
Area of Science:
- Materials Science
- Mechanical Engineering
- Composite Materials
Background:
- Glass-fiber-reinforced plastic (GFRP) composite pipes are valued for their stiffness, strength, and resistance to corrosion and chemicals.
- Their long service life makes them suitable for demanding piping applications.
Purpose of the Study:
- To investigate the pressure resistance capacity of GFRP composite pipes with varying fiber angles and wall thicknesses.
- To analyze stress, deformation, and failure modes under internal hydrostatic pressure.
- To validate a finite element model for composite pipe behavior.
Main Methods:
- GFRP composite pipes with fiber angles [±40] to [±70] degrees and varied thicknesses were subjected to internal hydrostatic pressure.
- Finite element analysis (FEA) using shell elements and Hashin damage criteria was employed.
- Simulations of pipes on the seabed were compared with existing data for model validation.
Main Results:
- Winding angles between [±40] and [±55] degrees, along with pipe thickness, critically influence pressure capacity.
- The highest pressure capacity was achieved at a [±55°] winding angle, attributed to the diameter-to-thickness ratio.
- Average total deformation across tested pipes was 0.37 mm.
Conclusions:
- Fiber winding angles and pipe thickness are key factors in optimizing the pressure performance of GFRP composite pipes.
- The study provides valuable insights for designing high-performance composite piping systems.
- FEA, incorporating progressive damage, accurately predicts the behavior of GFRP pipes under pressure.
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