Comparative study of axial and circumferential defects severity on the failure of polypropylene (PPR) pipes

Ouardi, Abderrazak; Mouhib, Nadia; Wahid, Achraf; Elghorba, Mohamed

doi:10.1016/j.engfailanal.2019.07.058

Cited by 10 publications

(3 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is due to the tendency of agglomeration becoming greater with the increase of hydrophobic nano‐SiO 2 . Later, the nanoparticles will become defects in the matrix and the advantages of the nanoparticles will not be exerted, resulting in a decrease in the tensile strength of the composite material 40,41 …”

Section: Resultsmentioning

confidence: 99%

“…Later, the nanoparticles will become defects in the matrix and the advantages of the nanoparticles will not be exerted, resulting in a decrease in the tensile strength of the composite material. 40,41 By analyzing the tensile strength data in Table 2, we find that when hydrophobic nano-SiO 2 with WBG-II was added, the tensile strength of the composites showed a trend of increasing and then decreasing with increase of the nano-SiO 2 content. When the equation is (0.5, 0.2), the tensile strength of the composite reaches a maximum value of 27.3 MPa, which may be due to the fact that, when the nano-SiO 2 content is small, it is uniformly dispersed on the PP-R matrix, so the applied stress is easily transferred from the matrix to the nano-SiO 2 and the formation of ⊎ crystals also plays a positive role in the tensile strength; thus the composite exhibits good tensile strength.…”

Section: Characterization Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Effect of hydrophobic nano‐silica/β‐nucleating agent on the crystallization behavior and mechanical properties of polypropylene random copolymers

Chen,

Bai,

Wang

et al. 2023

Polymer International

View full text Add to dashboard Cite

In this work, hydrophobic nano‐silica (SiO2) and β‐nucleating agent are incorporated into polypropylene random copolymer (PP‐R) matrix by melt blending. The effect of nano‐SiO2/β‐nucleating agents content on crystallization and mechanical behaviors of polypropylene random copolymer was investigated in detail. When the nano‐SiO2 was 0.5 wt% and the β‐nucleating agent content was 0.5 wt%, the tensile strength and impact strength of the composite were in a more balanced position. Regarding isothermal and non‐isothermal crystallization experiments, nano‐SiO2/β‐nucleating agent significantly accelerated the nucleation and growth of crystallites with a synergistic nucleation effect. Also, the crystallization kinetics of PP‐R/nano‐SiO2 /β‐nucleating agent, PP‐R/nano‐SiO2 and PP‐R/β‐nucleating agent composites were analyzed and compared by Avrami equation. The results showed that the PP‐R/nano‐SiO2/β‐nucleating agent composites have better crystallization rate and shorter semi‐crystallization time. This study shows that it has far‐reaching theoretical and practical implications for accelerating the development of new high‐performance PP‐R materials.This article is protected by copyright. All rights reserved.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Characterization Methodsmentioning

confidence: 99%

Effect of hydrophobic nano‐silica/β‐nucleating agent on the crystallization behavior and mechanical properties of polypropylene random copolymers

Chen,

Bai,

Wang

et al. 2023

Polymer International

View full text Add to dashboard Cite

show abstract

“…Majid et al [13] carried out a failure study and damage-reliability modeling of HDPE pipes. In addition, Ouardi et al [14] evaluated the severity of the defect on the Polypropylene Random (PPR) pipe failure. Comparison between two damage curves revealed that the circumferential notches are less severe than the axial notches.…”

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

Frattura Ed Integrità Strutturale

View full text Add to dashboard Cite

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.

show abstract

Experiment on frost heave failure mechanism of PPR water pipe

Zheng

Zhang

et al. 2020

Engineering Failure Analysis

View full text Add to dashboard Cite

Comparative study of axial and circumferential defects severity on the failure of polypropylene (PPR) pipes

Cited by 10 publications

References 24 publications

Effect of hydrophobic nano‐silica/β‐nucleating agent on the crystallization behavior and mechanical properties of polypropylene random copolymers

Effect of hydrophobic nano‐silica/β‐nucleating agent on the crystallization behavior and mechanical properties of polypropylene random copolymers

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

Experiment on frost heave failure mechanism of PPR water pipe

Contact Info

Product

Resources

About