TY - JOUR

T1 - Mechanisms of rapid fracture in PA12 grades

AU - Messiha, Mario

AU - Frank, Andreas

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

PY - 2022/2

Y1 - 2022/2

N2 - 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**.

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

UR - http://www.scopus.com/inward/record.url?scp=85121113530&partnerID=8YFLogxK

U2 - 10.1016/j.tafmec.2021.103145

DO - 10.1016/j.tafmec.2021.103145

M3 - Article

AN - SCOPUS:85121113530

VL - 117.2022

JO - Theoretical and Applied Fracture Mechanics

JF - Theoretical and Applied Fracture Mechanics

SN - 0167-8442

IS - February

M1 - 103145

ER -