Dependence of deformability and destruction of glass fiber pipes from initial torsion under the action of internal pressure

Karapetyan, K.A.; Valesyan, S.Sh.; Muradyan, N.S.

doi:10.33018/72.1.4

Cited by 2 publications

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“…During cyclic tests of fiberglass pipes for axial tension (average rate of change of axial tensile stress σ zz is approximately 16.2 MPa/min) and for internal hydrostatic pressure (average rate of change of internal pressure is about 26.7 atm/min, this corresponds to rate of stress change in the circumferential direction of the pipes σ θθ = 25.8 MPa/min) the value of the amplitude stress was applied equal to 0.6σ ult zz and 0.42σ ult θθ , respectively. Regarding the choice of the value of the amplitude stress σ θθ = 0.42σ ult θθ , it was noted, based on direct measurements, obeying the condition σ θθ ≤ 0.45σ ult θθ , fiberglass pipes with ϕ = 0 • during increasing internal pressure do not change the direction of deformation and experience only shortening [12].…”

Section: Methodsmentioning

confidence: 99%

The dependence of the deformation behavior of fiberglass pipes on the initial disorientation of reinforcement subjected to repeated-static internal hydrostatic pressure and axial tension

Karapetyan

Valesyan

Muradyan

2022

J. Phys.: Conf. Ser.

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The problems of influence of the technological reinforcement disorientation on the deformation behavior of composite tubular elements subjected to repeated-static internal hydrostatic pressure and axial tension, as well as the resistance to fracture of these elements subjected to the above-mentioned loading are discussed. The experimental part of research is carried out applying thin-walled tubular elements manufactured from the fiberglass fabric prepreg based on the modified epoxy resin. It is established that a possible deviation of the reinforcement angle from 60 to 80 taking place during the processing of material into goods has little effect on the fracture resistance both subjected to the internal hydrostatic pressure and axial tension of fiberglass pipes manufactured so that the directions of reinforcing fiberglass fabric warp and ones axis are coincided. Meanwhile, the following was stated that the accompanied shearing deformations are arising besides the basic cyclic deformations (noted in the direction of force application) for initially disorientation fiberglass pipes in difference from non-disoriented ones at the condition of pulsating (irregular) loading by the above-mentioned load-bearing factors. Calculations are proved that the reinforcement disorientation direction in the above-underlined limits is brought to the significant decrease of the energy dissipation coefficient of fiberglass pipes. The statement aiming the constructional solution of the problem is formulated in a sense of negative influence of the technological reinforcement disorientation on the composite tubular elements functioning at the conditions of cyclic axial tension and internal hydrostatic pressure.

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Section: Methodsmentioning

confidence: 99%

The dependence of the deformation behavior of fiberglass pipes on the initial disorientation of reinforcement subjected to repeated-static internal hydrostatic pressure and axial tension

Karapetyan

Valesyan

Muradyan

2022

J. Phys.: Conf. Ser.

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Deformation behavior and resistance to fracture of glass-fabric pipes subjected to complex loading with torque and internal hydrostatic pressure

Karapetyan

Valesyan

Muradyan

2020

J. Phys.: Conf. Ser.

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The results of fracture resistance and deformation behavior of thin-walled glass-plastics pipes subjected to internal hydrostatic pressure and torque at the conditions of complex and separate loading are considered. As a result of the obtained data comparative analysis, the practical guidelines are stated pointing to the optimal design of tubular constructional products made of reinforced plastics operating at the conditions of internal pressure and torque.

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Dependence of deformability and destruction of glass fiber pipes from initial torsion under the action of internal pressure

Abstract: Dependence of deformability and destruction of glass fiber pipes from initial torsion under the action of

Cited by 2 publications

References 1 publication

The dependence of the deformation behavior of fiberglass pipes on the initial disorientation of reinforcement subjected to repeated-static internal hydrostatic pressure and axial tension

The dependence of the deformation behavior of fiberglass pipes on the initial disorientation of reinforcement subjected to repeated-static internal hydrostatic pressure and axial tension

Deformation behavior and resistance to fracture of glass-fabric pipes subjected to complex loading with torque and internal hydrostatic pressure

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