Abstract:
In this paper, we have introduced the investigation of the test procedure of the plane strain fracture toughness K
1C of steel 15MnVN, which is the structure steel of the Jiu-Jiang Yangtze river bridge, using the three point bending method with large scale specimens.
The primary purpose of the present paper is to introduce the apparatus used and the special experimental techniques in our tests at cryogenic temperatures with large scale specimens.
These works will be conducive to solve the fracture problems in the cryogenic engineering, and to use the experimental technique for evaluating the fracture toughness at the subzero temperature.
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