Critical length parameter of HDPE and its use in fatigue lifetime predictions

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F24%3APU155033" target="_blank" >RIV/00216305:26210/24:PU155033 - isvavai.cz</a>

Result on the web

<a href="https://www.fracturae.com/index.php/fis/article/view/5211" target="_blank" >https://www.fracturae.com/index.php/fis/article/view/5211</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3221/IGF-ESIS.71.15" target="_blank" >10.3221/IGF-ESIS.71.15</a>

Result language

angličtina

Original language name

Critical length parameter of HDPE and its use in fatigue lifetime predictions

Original language description

The contribution describes the fatigue lifetime predictions of polyethylene notched specimens based on the theory of critical distance. The approach uses the line method, which averages the axial stress over the critical distance. The critical distance is determined from experimental data of Cracked Round Bar (CRB) specimens and specimens with a model notch. From these two sets of experimental fatigue data and corresponding axial stress distributions, the critical distance is determined. The critical distance depends on the number of cycles to failure and notch radius. For this reason, the critical distance is modified by the ratio of stress concentration factors and the modified distance is used for fatigue lifetime predictions of notched specimens with various notch radii. Using this approach significant savings in testing time can be achieved. CRB fatigue tests are commonly used tests for ranking PE pipe grades and are easily available. Adding the fatigue tests of notched specimens with a model notch, the critical parameter can be found, and fatigue lifetime predictions of various notches can be calculated.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20500 - Materials engineering

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Frattura ed Integrita Strutturale

ISSN

1971-8993

e-ISSN

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Volume of the periodical

19

Issue of the periodical within the volume

January 2025

Country of publishing house

IT - ITALY

Number of pages

12

Pages from-to

211-222

UT code for WoS article

001358064200001

EID of the result in the Scopus database

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