Mechanisms of rapid fracture in PA12 grades

Mario Messiha; Andreas Frank; Jan Heimink; Florian Arbeiter; Gerald Pinter

doi:10.1016/j.tafmec.2021.103145

Mechanisms of rapid fracture in PA12 grades

Mario Messiha, Andreas Frank, Jan Heimink, Florian Arbeiter, Gerald Pinter

Chair of Materials Science and Testing of Polymers (210)

Research output: Contribution to journal › Article › Research › peer-review

Abstract

Evidence is presented for an adiabatic decohesion mechanism of Rapid Crack Propagation (RCP) in polyamide (PA) 12. RCP was induced in pipe specimens using the Small–Scale Steady–State (S4) test. Fractography revealed a surface of “flakes” attached to the bulk through highly fibrillated regions. A temperature rise recorded ahead of the propagating crack tip in combination with the observed fracture appearance indicates a thermally activated disentanglement fracture mechanism for PA12 pipe grades. Using mathematical formulations of the adiabatic decohesion model proposed by Leevers, strong correlation was found between S4 test results and a newly defined analytical ranking parameter R**.

Original language	English
Article number	103145
Number of pages	11
Journal	Theoretical and Applied Fracture Mechanics
Volume	117.2022
Issue number	February
Early online date	30 Oct 2021
DOIs	https://doi.org/10.1016/j.tafmec.2021.103145
Publication status	Published - Feb 2022

Bibliographical note

Funding Information:
The research work of this paper was performed at the Polymer Competence Center Leoben GmbH (PCCL, Austria) within the framework of the COMET-program (Grant Nr.: 879785), which is funded by the Federal Ministry for Transport, Innovation and Technology (Austria) and Federal Ministry for Economy, Family and Youth (Austria) with contributions by Evonik Operations GmbH (Germany) and the Montanuniversitaet Leoben (Austria). The PCCL is funded by the Austrian Government and the State Governments of Styria and Upper Austria. Special thanks go to Jutta Geier for a thorough fractographic analysis via SEM.

Publisher Copyright:
© 2021

Keywords

Adiabatic decohesion
Dynamic fracture
Fracture mechanics
Rapid crack propagation
Time–dependent material behavior

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10.1016/j.tafmec.2021.103145

Cite this

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title = "Mechanisms of rapid fracture in PA12 grades",

abstract = "Evidence is presented for an adiabatic decohesion mechanism of Rapid Crack Propagation (RCP) in polyamide (PA) 12. RCP was induced in pipe specimens using the Small–Scale Steady–State (S4) test. Fractography revealed a surface of “flakes” attached to the bulk through highly fibrillated regions. A temperature rise recorded ahead of the propagating crack tip in combination with the observed fracture appearance indicates a thermally activated disentanglement fracture mechanism for PA12 pipe grades. Using mathematical formulations of the adiabatic decohesion model proposed by Leevers, strong correlation was found between S4 test results and a newly defined analytical ranking parameter R**.",

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author = "Mario Messiha and Andreas Frank and Jan Heimink and Florian Arbeiter and Gerald Pinter",

note = "Funding Information: The research work of this paper was performed at the Polymer Competence Center Leoben GmbH (PCCL, Austria) within the framework of the COMET-program (Grant Nr.: 879785), which is funded by the Federal Ministry for Transport, Innovation and Technology (Austria) and Federal Ministry for Economy, Family and Youth (Austria) with contributions by Evonik Operations GmbH (Germany) and the Montanuniversitaet Leoben (Austria). The PCCL is funded by the Austrian Government and the State Governments of Styria and Upper Austria. Special thanks go to Jutta Geier for a thorough fractographic analysis via SEM. Publisher Copyright: {\textcopyright} 2021",

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AU - Heimink, Jan

AU - Arbeiter, Florian

AU - Pinter, Gerald

N1 - Funding Information: The research work of this paper was performed at the Polymer Competence Center Leoben GmbH (PCCL, Austria) within the framework of the COMET-program (Grant Nr.: 879785), which is funded by the Federal Ministry for Transport, Innovation and Technology (Austria) and Federal Ministry for Economy, Family and Youth (Austria) with contributions by Evonik Operations GmbH (Germany) and the Montanuniversitaet Leoben (Austria). The PCCL is funded by the Austrian Government and the State Governments of Styria and Upper Austria. Special thanks go to Jutta Geier for a thorough fractographic analysis via SEM. Publisher Copyright: © 2021

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AB - Evidence is presented for an adiabatic decohesion mechanism of Rapid Crack Propagation (RCP) in polyamide (PA) 12. RCP was induced in pipe specimens using the Small–Scale Steady–State (S4) test. Fractography revealed a surface of “flakes” attached to the bulk through highly fibrillated regions. A temperature rise recorded ahead of the propagating crack tip in combination with the observed fracture appearance indicates a thermally activated disentanglement fracture mechanism for PA12 pipe grades. Using mathematical formulations of the adiabatic decohesion model proposed by Leevers, strong correlation was found between S4 test results and a newly defined analytical ranking parameter R**.

KW - Adiabatic decohesion

KW - Dynamic fracture

KW - Fracture mechanics

KW - Rapid crack propagation

KW - Time–dependent material behavior

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Mechanisms of rapid fracture in PA12 grades

Abstract

Bibliographical note

Keywords

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