Effect of viscoelasticity on the hold pressure of plastic pipe reinforced by cross helically wound steel wires in leak test

Zheng, Jinyang; Hou, Dongsheng; Zhong, Sijia; Shi, Jianfeng; Li, Guangzhong

doi:10.1016/j.compstruct.2015.08.013

Cited by 7 publications

(3 citation statements)

References 12 publications

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“…Our research group, Zheng et al ., studied the short‐term burst pressure of PSPs under various temperatures by theoretical and experimental methods. Zheng et al . also studied the effect of the viscoelasticity on the hold pressure of PSPs in a leak test and proposed a theoretical model.…”

Section: Introductionmentioning

confidence: 99%

Investigation of interfacial debonding between steel wire and adhesive resin

Zhang

Shi

2017

J of Applied Polymer Sci

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Plastic pipes reinforced by cross helically wound steel wire (PSPs) have been widely used in the transportation of petroleum, natural gas, municipal water, and so on. With the applications of PSPs in high-temperature and high-pressure environments, the problem of PSP joints has begun to appear. The bulging failure of PSP joints is the main failure mode, and steel-polymer interfacial debonding is the major factor causing bulging failure. Thus, it is crucial to understand the failure criterion of steel-polymer interfacial debonding. In this study, pull-out tests were carried out at different temperatures and loading rates. A finite element (FE) model was developed on the basis of the cohesive element. We proposed that the key parameter for the bugling failure of PSPs was the shear stress of the steel-polymer interface. We assumed that when the shear stress exceeded the shear strength, this led to the degradation of the interface. By iteratively presetting the shear strength and calculation of the FE model, the FE results were verified with experimental results. We found that the shear stress of the front part of the FE model first reached its peak value; its interface began to degrade, and then, the shear stress decreased. The peak value of the shear stress moved toward the end part of the FE model, and the shear strength could be obtained. Finally, the effects of the temperature and failure time on the shear strength were investigated.

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Section: Introductionmentioning

confidence: 99%

Investigation of interfacial debonding between steel wire and adhesive resin

Zhang

Shi

2017

J of Applied Polymer Sci

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“…In the industrial fields, including hydraulic and pneumatic systems, water distribution systems, chemical industry, pharmaceutical industry and nuclear engineering, many different kinds of pipes have commonly been used (Gellin, 1980; Kyriakides and Ju, 1992; Li and Zhou, 2015; Sadowski and Rotter, 2013; Yuan and Kyriakides, 2014). All these fields contain harsh working conditions, which means that the pipes can easily be affected by many different factors such as variable loads, temperature and pressure parameters during different applications (Ye et al, 2016; Zheng et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Linear matrix inequality-based model matching H₂ output feedback control of a new leak tightness machine working based on hydrostatic pressure aging method

Yalçin

Koyun

2017

Transactions of the Institute of Measurement and Control

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Fluid leaks owing to broken pipes can be a serious problem for any hydraulic system. The main reasons for pipe breakage are spontaneously changing hydrostatic and hydrodynamic pressure values inside the pipe or faults occurring during the pipe manufacturing process. Therefore, different kinds of leak tightness tests are required in many standards for approval of the pipes used in both academic researches and industrial applications. Hydrostatic pressure aging is the most common method among leak tightness test procedures. However, conventional test machines cannot reach above 700 bar owing to their mechanical specifications. In this study, the design of a new leak tightness test machine that can reach above 1200 bar and its Linear matrix inequality-based model matching H2 output feedback control have been achieved. The efficacy of the test machine and proposed controller have been shown with both simulation and experimental results.

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“…The pipes are affected by many different parameters such as variable loads, temperature and pressure parameters during different operations. 7,8 For safety, environmental and financial reasons, new-generation pipes are expected to function over 100 years under normal working conditions. 9 In order to ensure such a great performance, the pipes have to be well tested before they start to be used in engineering applications.…”

Section: Introductionmentioning

confidence: 99%

Design and servo control of a leak tightness machine working based on hydrostatic pressure aging method

Yalçin

Torun

Balcilar

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part I:

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The leakage problem, which occurs due to the high hydrostatic pressure values of the fluid inside the pipes, is a serious issue in most of the pipeline systems. Therefore, the leak tightness test is required in different standards for verification of almost every kind of pipes used in both academic researches and industrial applications. The behavior of the hydrostatic pressure parameter in the test pipe has to be as smooth as possible during the leak tightness test. The conventional control loops of the servo mechanisms used for pumping the test fluid into the test pipe are weak to provide the minimum overshoot, the rise time and the steady-state error. In this situation, hydrostatic pressure tests are not capable of giving meaningful results. In this study, a leak tightness test machine working with a servo control loop to provide the optimum hydrostatic pressure pattern is designed. The efficacy of the designed leak tightness test machine and proposed optimized servo control loop have been shown with both simulation and experimental results.

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Effect of viscoelasticity on the hold pressure of plastic pipe reinforced by cross helically wound steel wires in leak test

Cited by 7 publications

References 12 publications

Investigation of interfacial debonding between steel wire and adhesive resin

Investigation of interfacial debonding between steel wire and adhesive resin

Linear matrix inequality-based model matching H₂ output feedback control of a new leak tightness machine working based on hydrostatic pressure aging method

Design and servo control of a leak tightness machine working based on hydrostatic pressure aging method

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Effect of viscoelasticity on the hold pressure of plastic pipe reinforced by cross helically wound steel wires in leak test

Cited by 7 publications

References 12 publications

Investigation of interfacial debonding between steel wire and adhesive resin

Investigation of interfacial debonding between steel wire and adhesive resin

Linear matrix inequality-based model matching H2 output feedback control of a new leak tightness machine working based on hydrostatic pressure aging method

Design and servo control of a leak tightness machine working based on hydrostatic pressure aging method

Contact Info

Product

Resources

About

Linear matrix inequality-based model matching H₂ output feedback control of a new leak tightness machine working based on hydrostatic pressure aging method