Angular structure with improved fracture toughness and manufacturing method and pressure tank

摘要

The present invention relates to a rectangular structure, a manufacturing method and a rectangular pressure tank with improved fracture toughness that can disperse stress concentrated at the corners of the rectangular structure to improve stability and reliability, and includes a first wall having a first inner surface formed thereon; A second wall connected to the first wall and having a second inner surface connected to the first inner surface at a boundary of a first corner portion, and the first corner to disperse stress concentrated at the first corner portion; It may include a first stress dispersing portion formed in the portion.