Abstract
Abstract Fiber reinforced rubber pipes are widely used to transport fluid at locations requiring flexible connections in pipeline systems. The spherical self-balancing fiber reinforced rubber pipes with low stiffness are drawing attention because of their vibration suppression performance under high internal pressure. In this paper, a theoretical model is proposed to calculate the axial stiffness and lateral stiffness of spherical self-balancing fiber reinforced rubber pipes. The inhomogeneous anisotropy of the reinforced layer and the nonlinear stress-strain relationship of the reinforced fiber are considered in the model. The accuracy of the model is verified by experimental results. Theoretical calculation finds that both the axial and lateral stiffness are influenced significantly by the key structural parameters of the pipe (the axial length, the circumferential radius at the end, the meridional radius, and the initial winding angle). The stiffness can be reduced remarkably with optimal meridional radius and initial winding angle, without any side effect on the self-balance of the pipe. The investigation methods and results presented in this paper will provide guidance for design of fiber reinforced rubber pipes in the future.
Highlights
Fiber reinforced rubber pipes are widely used to transport fluid at locations requiring flexible connections in pipeline systems
The investigation methods and results presented in this paper will provide guidance for design of fiber reinforced rubber pipes in the future
The axial stiffness and lateral stiffness of spherical self-balancing fiber reinforced rubber pipes are investigated based on the anisotropic membrane theory and the composite Timoshenko beam theory, respectively
Summary
Abstract: Fiber reinforced rubber pipes are widely used to transport fluid at locations requiring flexible connections in pipeline systems. The spherical self-balancing fiber reinforced rubber pipes with low stiffness are drawing attention because of their vibration suppression performance under high internal pressure. A theoretical model is proposed to calculate the axial stiffness and lateral stiffness of spherical self-balancing fiber reinforced rubber pipes. The axial stiffness and lateral stiffness of spherical self-balancing fiber reinforced rubber pipes are investigated based on the anisotropic membrane theory and the composite Timoshenko beam theory, respectively. The key structural parameters of the spherical pipe are the axial length, the circumferential radius at the ends, the meridional radius and the initial winding angle Influences of these parameters on the distribution of winding angle, the anisotropy of the reinforced layer, the axial stiffness and the lateral stiffness are investigated in detail. The investigation methods and results presented in this paper will provide guidance for design of fiber reinforced rubber pipes in the future
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