Shakedown and Ratcheting in Thermal Cycling Environments – Understanding with the Bree Diagram
In a thermal cycling environment, thermal stresses, which are secondary stresses, repeatedly increase and decrease with temperature changes. When thermal stresses are repeated in the presence of primary stress, plastic strain may accumulate in one direction with each cycle, and permanent deformation may gradually progress. This phenomenon is called ratcheting [...]
Electromagnetic Force Analysis of Fusion Reactor Vacuum Vessel (Case Study using ANSYS Maxwell)
Background: Plasma Disruption Phenomena and Electromagnetic Forces Acting on the Vacuum Vessel Within a fusion reactor (here, referring to the vacuum vessel in a magnetic confinement type tokamak fusion reactor), a high-current plasma is confined. In the case of ITER, this current reaches 17MA [...]
Acceptance of various tests and inspections
General inspection companies are limited in the tests and inspections they can perform depending on the testing machines they own. Fusion reactors, especially equipment within the vacuum vessel, require tests spanning multiple fields. In addition to mechanical property tests and inspections, non-destructive testing of welded parts, measurement of gas release [...]