| Autor: |
Andrej Likeb, Yury Matvienko, Nenad Gubeljak |
| Rok vydání: |
2014 |
| Předmět: |
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| Zdroj: |
Procedia Materials Science. 3:1934-1940 |
| ISSN: |
2211-8128 |
| DOI: |
10.1016/j.mspro.2014.06.312 |
| Popis: |
Fracture toughness Measurement of thin walled pipe-line with flaw or defect in most critical axial direction is difficult. In this paper the non-standard modified specimens has been proposed for simple fracture testing. The comparison between fracture behaviour of single edge notch bending (SENB), compact tension (CT) and pipe-ring specimens with notch and fatigue pre-crack were analysed. In order to determine CTOD-R curve the normalization method by using remote measurement CMOD has been used for all specimens. For non-standard pipe ring pre-cracked specimens the plastic correction eta factor is determined by using finite element method. The stable crack growth initiation was determined also as a crack tip surface strain-relaxation by using stereo-optical grading method. Comparison between CTOD-R curves of all three types of specimens shows quite similar fracture toughness in stable crack initiation range. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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