Prediction of the Lifetime of the Chlorinated PVC Thermoplastic Material Subjected to Thermomechanical Tests - Tensile Test under the Influence of Temperature

CPVC is an increasingly popular material for plumbing pipes and other applications that require strong and temperature-resistant material. This resin is created using a chlorination process, giving it Chlorine levels that range from 63 to 69% and thus a unique set of characteristics that make it ideal for certain applications. CPVC's combination of corrosion-resistance and low installation costs make it a great substitute for copper in environments with non-ambient conditions such as higher temperatures. This makes it an economic choice for many projects that require smaller budgets. With a variety of applications, CPVC provides a great alternative requiring strong and durable material. The aim of this paper is to characterize the mechanical characteristics of chlorinated PVC (CPVC). Tensile tests were carried on the compounds at different temperatures ranging from -20 to 90°C and crosshead speeds from 5 to 500 mm/min. The results were analyzed to determine how crosshead speed and temperature affected on the mechanical characteristics of CPVC specimens. Two damage models are then developed, one model obtained through by adapting the unified theory version and the other quasi-experimental static model based on ultimate stress. These models allow us to evaluate the damage evolution of CPVC samples and to determine the safety and maintenance intervals of this material.

Section: Experimental Damagementioning

confidence: 99%

Predicting the lifetime of CPVC under increasing temperature and crosshead speed

Khtibari,

En-Naji,

Kartouni

et al. 2023

“…According to the results obtained, it can be seen that the uncertainties related to the applied load and to the length of the crack lead to an increase in the probability of rupture of the pipe and to a reduction in the durability of the structure. Moreover, several works on the mechanical reliability and behavior of polymers have been carried out [18][19][20][21][22][23][24] paying attention to rupture and failure of polymer structures to keep away from accidents causing production loose plus life damage of both human and material, besides saving money. Necar [25] studied the effect of temperatures ranging from -10 to 70 ° C on the mechanical properties of CPVC.…”

Section: Introductionmentioning

confidence: 99%

Fracture analysis of defect Chlorinated Poly Vinyl Chloride pipes based on burst pressure and prediction their fraction of life

Gugouch

Wahid²,

Bassir

et al. 2023

Most Chlorinated Poly Vinyl Chloride (CPVC) resins contain 63-69 % chlorine, in particular those used for the extrusion of plumbing tubes, due to this chlorination of basic PVC, CPVC offers a mixture of corrosion resistance and low installation costs for its main applications requiring service in non-ambient conditions. CPVC replaces copper owing to its economic gain and by virtue of its pressure resistance characteristics. In this article, we have been interested in fracture analysis and damage modeling of CPVC tubes by subject CPVC samples to burst pressure tests. We performed a set of burst tests on virgin and artificially damaged CPVC pipe at different notch lengths, then submitted the specimens to burst pressure tests, in addition to recording the pressure and time during these tests for use in conducting the study. The results of the burst tests were exploited to estimate the damage and reliability of the material, these two parameters allow us to follow the degradation of the pipes used; subsequently, we determined a new relationship between these two parameters through the fraction life. This makes it possible to predict the moment of damage acceleration and to intervene at the right time for engaging predictive maintenance.

“…Al-Qahtani [9] studied the temperature effect and crosshead speed on the CPVC tensile properties. Previous experiments works have been performed for the mechanical characterization of different polymer tubes through static and burst tests [10,11]. The results of the static tests performed on specimens extracted from an exploded tube showed that aging has the effect of reducing the elongation from 275 mm to 26 mm [12].…”

Section: Introductionmentioning

confidence: 99%

Study of defects influence on chlorinated polyvinyl chloride pipes damage and analysis of their fracture

Gugouch,

Meknassi,

Elghorba

et al. 2023

In several industrial applications, plastic, composites and ceramics replace a number of metallic structures such as copper, aluminum and steel. Most recently installed piping water and gas systems in the world are made of thermoplastic due to its advantages, for example, low cost, ease of fabrication and corrosion resistance. In this work, the chosen material is chlorinated polyvinyl chloride (CPVC); the best one used to transport cold and hot water beside simplicity of installation. Notwithstanding, the pipes in service are submitted to different loads, related to environmental, thermal and mechanical effects which procure to mechanisms of degradation. The aim of this article is to assess the effect of the defect on CPVC pipes, through a study of the defect criticality in the form of semi-elliptical, then the ability to predict defected pipes residual life. Therefore unexpected and sudden failure caused by pipes accelerated damage. Therefore, we performed burst tests on both pre-damaged CPVC pipes and virgin ones. To lead our work in this paper, interested in the damage modeling and the failure analysis of CPVC pipes, we adapted the model of unified theory static damage, originally developed in fatigue. We used burst pressure tests to identify the limits of three damage progression phases and, in turn, to calculate the critical life fraction at which these flaws become harmful. Furthermore, we identify the critical depth for the studied defect. These results and techniques enable industrialist s to anticipate this structures service life under these conditions after that set up a robust system of maintenance to ensure a reliable and safe functioning of the structure.