Effect of plastic zone size on fracture characteristics according to shape of specimens
| Autor: | Keon-Tae Park, Jaegu Choi, Soo Park, Chang-Sung Seok, Byungwoo Moon |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0209 industrial biotechnology
Materials science Mechanical Engineering 02 engineering and technology Free body diagram Crack stability Zone size 020303 mechanical engineering & transports 020901 industrial engineering & automation Fracture toughness 0203 mechanical engineering Mechanics of Materials Fracture (geology) General Materials Science Composite material Deformation (engineering) |
| Zdroj: | International Journal of Pressure Vessels and Piping. 172:227-232 |
| ISSN: | 0308-0161 |
| DOI: | 10.1016/j.ijpvp.2019.03.031 |
| Popis: | To apply the leak before break concept to nuclear pipes, obtaining the fracture characteristics of nuclear pipes from real pipes would be ideal. But, conducting such experiments is difficult due to its efficiency and cost. Therefore, many specimens and test methods or theories have been proposed and studied to obtain fracture properties similar to real pipes. However, the theoretical formulation and quantification of the difference between the constraint effect and the fracture resistance characteristic are insufficient, and the results of previous studies are insufficient, which is explained only under a specific case and special conditions. In this study, the sizes of the plastic zones were calculated according to the crack length of each specimen shape used in the test and the differences in the fracture resistance curves depending on the change in shape were evaluated. Furthermore, we compare the different crack stability assessment values depending on specimen deformation, and crack stability assessment was performed using a crack driving force diagram. Using crack stability assessment results, the relationship between the size of the plastic zone and fracture toughness was evaluated. |
| Databáze: | OpenAIRE |
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