Number of the records: 1
Constraint effect on the slow crack growth in polyethylene
- 1.
SYSNO ASEP 0385514 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Constraint effect on the slow crack growth in polyethylene Author(s) Hutař, Pavel (UFM-A) RID, ORCID
Zouhar, Michal (UFM-A)
Nezbedová, E. (CZ)
Sadílek, J. (CZ)
Žídek, J. (CZ)
Náhlík, Luboš (UFM-A) RID, ORCID
Knésl, Zdeněk (UFM-A)Number of authors 7 Source Title International Journal of Structural Integrity - ISSN 1757-9864
Roč. 2, č. 3 (2012), s. 118-126Number of pages 9 s. Language eng - English Country GB - United Kingdom Keywords slow crack growth ; polyethylene ; constraint Subject RIV JL - Materials Fatigue, Friction Mechanics R&D Projects GD106/09/H035 GA ČR - Czech Science Foundation (CSF) GA106/09/0279 GA ČR - Czech Science Foundation (CSF) GC101/09/J027 GA ČR - Czech Science Foundation (CSF) Institutional support UFM-A - RVO:68081723 Annotation From the practical point of view, most relevant damage to high density polyethylene (HDPE) structures is caused by slow crack growth. Therefore, detailed information about this type of damage is necessary. Experimental results transfer from specimens to real structure can be influenced by structure geometry (constraint). Therefore, the purpose of this paper is to investigate and discuss the effect of the constraint and relation between crack mouth opening displacement (CMOD) and crack length. The constraint effect is mainly effect of the structure geometry and can be quantified by T-stress. Two different test specimens with different constraint level (T-stress) were prepared: single edge notched specimen and modified single edge notch (SEN) specimen. The crack mouth opening displacement, crack tip opening displacement and crack length was measured. The main conclusions of this work can be summarized as: the slow crack growth rate in HDPE materials corresponds to velocity of CMOD; the influence of the presented specimen geometry on slow crack growth rate can be considered as negligible; and for transfer of the experimental results from specimens to real structure the influence of the structure geometry (constraint) is not critical. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2013
Number of the records: 1