Abstract
It has been recognized that the threshold stress intensity factor range AKth of a short crack is lower than that of a long crack. The short crack behavior in plain specimen has been studied by many researchers. However, the behavior of a short crack at the root of a long notch is not yet clear. The crack closure behavior is considered to be affected by the constraint at notch root and it is dependent on the length and the root radius of notch. In this study, fatigue tests on specimens with short pre-crack at long notch were done and the difference in crack closure behavior was studied. As a result, short crack effect appeared in any notch root radius. In a sharp notch, the crack opening point easily reached its stable condition after a small amount of crack extension. On the contrary in a dull notch, the opening point was lower than the stable condition and consequently short crack effect lasted in relatively wide range of crack extension. The small crack effect of notched specimen was discussed based on crack closure behavior.
| Original language | English |
|---|---|
| Title of host publication | Materials Structure and Micromechanics of Fracture VI |
| Pages | 515-518 |
| Number of pages | 4 |
| DOIs | |
| Publication status | Published - Mar 25 2011 |
| Event | 6th International Conference "Materials Structure and Micromechanics of Fracture, MSMF-6" - Brno, Czech Republic Duration: Jun 28 2010 → Jun 30 2010 |
Publication series
| Name | Key Engineering Materials |
|---|---|
| Volume | 465 |
| ISSN (Print) | 1013-9826 |
Other
| Other | 6th International Conference "Materials Structure and Micromechanics of Fracture, MSMF-6" |
|---|---|
| Country | Czech Republic |
| City | Brno |
| Period | 6/28/10 → 6/30/10 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering
Cite this
Behavior of short fatigue crack at notch root. / Mizobe, Koshiro; Kubota, Masanobu; Kondo, Yoshiyuki.
Materials Structure and Micromechanics of Fracture VI. 2011. p. 515-518 (Key Engineering Materials; Vol. 465).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Behavior of short fatigue crack at notch root
AU - Mizobe, Koshiro
AU - Kubota, Masanobu
AU - Kondo, Yoshiyuki
PY - 2011/3/25
Y1 - 2011/3/25
N2 - It has been recognized that the threshold stress intensity factor range AKth of a short crack is lower than that of a long crack. The short crack behavior in plain specimen has been studied by many researchers. However, the behavior of a short crack at the root of a long notch is not yet clear. The crack closure behavior is considered to be affected by the constraint at notch root and it is dependent on the length and the root radius of notch. In this study, fatigue tests on specimens with short pre-crack at long notch were done and the difference in crack closure behavior was studied. As a result, short crack effect appeared in any notch root radius. In a sharp notch, the crack opening point easily reached its stable condition after a small amount of crack extension. On the contrary in a dull notch, the opening point was lower than the stable condition and consequently short crack effect lasted in relatively wide range of crack extension. The small crack effect of notched specimen was discussed based on crack closure behavior.
AB - It has been recognized that the threshold stress intensity factor range AKth of a short crack is lower than that of a long crack. The short crack behavior in plain specimen has been studied by many researchers. However, the behavior of a short crack at the root of a long notch is not yet clear. The crack closure behavior is considered to be affected by the constraint at notch root and it is dependent on the length and the root radius of notch. In this study, fatigue tests on specimens with short pre-crack at long notch were done and the difference in crack closure behavior was studied. As a result, short crack effect appeared in any notch root radius. In a sharp notch, the crack opening point easily reached its stable condition after a small amount of crack extension. On the contrary in a dull notch, the opening point was lower than the stable condition and consequently short crack effect lasted in relatively wide range of crack extension. The small crack effect of notched specimen was discussed based on crack closure behavior.
UR - http://www.scopus.com/inward/record.url?scp=79952836251&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79952836251&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/KEM.465.515
DO - 10.4028/www.scientific.net/KEM.465.515
M3 - Conference contribution
AN - SCOPUS:79952836251
SN - 9783037850060
T3 - Key Engineering Materials
SP - 515
EP - 518
BT - Materials Structure and Micromechanics of Fracture VI
ER -