Application of fracture mechanics for the characterization of <scp>PVC</scp> pipes. I. Evaluation of the applicability of the <scp>EWF</scp> technique in specimens produced directly from pipes

Rodolfo, Antonio

doi:10.1002/vnl.21798

Cited by 8 publications

(1 citation statement)

References 31 publications

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“…12-(b),(c) and (d). The same ductile tearing was identified by Rodolfo et al [34] when using various fracture mechanics methodologies for the characterization of PVC pipes.…”

Section: Effect Of Notch and Notch Depthsupporting

confidence: 70%

Mechanical behavior and fracture characteristics of polymeric pipes under curved three point bending tests: Experimental and numerical approaches

Jemii

Bahri

Taktak

et al. 2022

Engineering Failure Analysis

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“…12-(b),(c) and (d). The same ductile tearing was identified by Rodolfo et al [34] when using various fracture mechanics methodologies for the characterization of PVC pipes.…”

Section: Effect Of Notch and Notch Depthsupporting

confidence: 70%

Mechanical behavior and fracture characteristics of polymeric pipes under curved three point bending tests: Experimental and numerical approaches

Jemii

Bahri

Taktak

et al. 2022

Engineering Failure Analysis

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Application of fracture mechanics for the characterization of poly(vinyl chloride) pipes. II. Evaluation of a ring‐type specimen for fracture mechanics testing

Rodolfo

John

2021

Vinyl Additive Technology

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An unplasticized poly(vinyl chloride) (U-PVC) pipe sample used in infrastructure applications in Brazil (nominal diameter DN 100, outside diameter 110 mm) was evaluated according to different fracture mechanics methodologies, including essential work of fracture (EWF) and other fracture toughness parameters such as the stress intensity factor K C and plane strain energy release rate G 1C . This pipe sample was also tested for the quality of processing (degree of gelation) via differential scanning calorimetry (DSC) and tensile strength. The comparative evaluation of different specimen configurationscurved specimens in three-point bending (CTPB) and full rings in tension (SNRT), in thicknesses varying from 5 to 30 mm, showed initial evidence of the suitability of ring-type specimens for the evaluation of EWF and K C . Results also indicate that the full ring geometry, at least in the present experimental setup, presents some drawbacks probably due to the storage of large amounts of elastic energy throughout the test. This fact leads to relevant deviations in both load-displacement behavior and results for strain energy release rate (J C ), and the results found here will guide future research using full and split rings in different loading modes and improved experimental setups. It

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Modification of ultrasonic transducers to study crack propagation in vinyl polymers, supported by SEM technique

Barakat

El-Wakil

Hasan

2022

Vinyl Additive Technology

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Detecting defects in various industrial products remains a challenging task in the industry. Researchers are constantly working to improve detection techniques and tools for various defects, particularly cracks. Many industrial structures suffer from cracks. The selection of a suitable technique and/or tool is based upon the tested structures and the accuracy of the technique and/or tool. The work's novelty is the development of a fully accurate, simple, and safe ultrasonic tool for precisely scanning cracks. A pen-shaped cone was added to the ultrasonic transducers to improve their performance. Different crosshead speeds and annealing techniques were used to cause cracks on medium density polyethylene (MDPE) and poly-methyl-methacrylate (PMMA) polymer plates with specific dimensions. Cone reduced the front diameter of the transducers from 12 to 2 mm (cone tip diameter). It improved the transducers by giving them new properties such as a small near field, a collimated beam, high sensitivity, and high wave reflection. The modified transducers tracked the cracks at discrete sequential sites, where the ultrasonic velocity was measured to determine the crack speed, critical crack speed, dynamic stress intensity factor, and crack branching phenomenon. Additionally, ultrasonic attenuation was measured in order to accurately determine crack growth behavior, the crack's neck zone, and the crack growth dependency on both plate thickness and annealing. Scanning electron microscope (SEM) images revealed crack propagation in polymer plates. The results of ultrasonic testing and SEM evaluations were consistent. This guaranteed that the modified transducers could scan cracks accurately.

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Application of fracture mechanics for the characterization of PVC pipes. I. Evaluation of the applicability of the EWF technique in specimens produced directly from pipes

Cited by 8 publications

References 31 publications

Mechanical behavior and fracture characteristics of polymeric pipes under curved three point bending tests: Experimental and numerical approaches

Mechanical behavior and fracture characteristics of polymeric pipes under curved three point bending tests: Experimental and numerical approaches

Application of fracture mechanics for the characterization of poly(vinyl chloride) pipes. II. Evaluation of a ring‐type specimen for fracture mechanics testing

Modification of ultrasonic transducers to study crack propagation in vinyl polymers, supported by SEM technique

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