Abstract
In the case of high density polyethylene (HDPE), the fatigue crack propagates in a discontinuous manner, which can be observed by distinct striations. In this article, fatigue crack growth (FCG) experiments were conducted on two grades of HDPE pipe with compact-tension (CT) and cracked round bar (CRB) specimens. The effects of the stress ratio (R-ratio) which is defined as the ratio of minimum stress and maximum stress of fatigue loadings and the frequency on FCG behavior were experimentally studied. Although FCG rates showed a great dependence on the R-ratio in terms of the range of the stress-intensity factor, the effect of the frequency may be considered to be significant in the low crack growth region. In addition, these experimental data were employed for predicting the lifetime on the basis of the crack layer (CL) theory. Only a few steps of FCG are needed to determine all necessary parameters for CL theory, and the FCG behavior can be reconstructed based on a computer program that has been developed for the application of CL theory. The predictions from this program accord with experimental data.
| Original language | English |
|---|---|
| Pages (from-to) | 1421-1428 |
| Number of pages | 8 |
| Journal | Polymer Engineering and Science |
| Volume | 49 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2009 Jul 1 |
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ASJC Scopus subject areas
- Polymers and Plastics
- Materials Chemistry
- Chemistry(all)
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The use of crack layer theory to predict the lifetime of the fatigue crack growth of high density polyethylene. / Choi, Byoung-Ho; Balika, Werner; Chudnovsky, Alexander; Pinter, Gerald; Lang, Reinhold W.
In: Polymer Engineering and Science, Vol. 49, No. 7, 01.07.2009, p. 1421-1428.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The use of crack layer theory to predict the lifetime of the fatigue crack growth of high density polyethylene
AU - Choi, Byoung-Ho
AU - Balika, Werner
AU - Chudnovsky, Alexander
AU - Pinter, Gerald
AU - Lang, Reinhold W.
PY - 2009/7/1
Y1 - 2009/7/1
N2 - In the case of high density polyethylene (HDPE), the fatigue crack propagates in a discontinuous manner, which can be observed by distinct striations. In this article, fatigue crack growth (FCG) experiments were conducted on two grades of HDPE pipe with compact-tension (CT) and cracked round bar (CRB) specimens. The effects of the stress ratio (R-ratio) which is defined as the ratio of minimum stress and maximum stress of fatigue loadings and the frequency on FCG behavior were experimentally studied. Although FCG rates showed a great dependence on the R-ratio in terms of the range of the stress-intensity factor, the effect of the frequency may be considered to be significant in the low crack growth region. In addition, these experimental data were employed for predicting the lifetime on the basis of the crack layer (CL) theory. Only a few steps of FCG are needed to determine all necessary parameters for CL theory, and the FCG behavior can be reconstructed based on a computer program that has been developed for the application of CL theory. The predictions from this program accord with experimental data.
AB - In the case of high density polyethylene (HDPE), the fatigue crack propagates in a discontinuous manner, which can be observed by distinct striations. In this article, fatigue crack growth (FCG) experiments were conducted on two grades of HDPE pipe with compact-tension (CT) and cracked round bar (CRB) specimens. The effects of the stress ratio (R-ratio) which is defined as the ratio of minimum stress and maximum stress of fatigue loadings and the frequency on FCG behavior were experimentally studied. Although FCG rates showed a great dependence on the R-ratio in terms of the range of the stress-intensity factor, the effect of the frequency may be considered to be significant in the low crack growth region. In addition, these experimental data were employed for predicting the lifetime on the basis of the crack layer (CL) theory. Only a few steps of FCG are needed to determine all necessary parameters for CL theory, and the FCG behavior can be reconstructed based on a computer program that has been developed for the application of CL theory. The predictions from this program accord with experimental data.
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U2 - 10.1002/pen.21436
DO - 10.1002/pen.21436
M3 - Article
VL - 49
SP - 1421
EP - 1428
JO - Polymer Engineering and Science
JF - Polymer Engineering and Science
SN - 0032-3888
IS - 7
ER -