2018 Volume 74 Issue 2 Pages I_337-I_347
In order to improve the fatigue life of welded joint, additional weliding, glinder and peening technologies have been used, and also the effeciancy of the techniques have been provened by experiment evidences. However, great concerns are remained for the experimental verification that it is not enough because of time and cost limit. It's not fully understood for the influence on fatigue life of welding process conditions like heat input, welding position and target, because welding bead is sensitive to them. The purpose of present study is to evalate the influence of additional welding condition on fatigue life of welded joint, by using weld pool analysis which can simulate welding process and FE analysis which can describe the cyclic plasticity under fatigue loading. In particular, we conducted the cyclic plasticity analysis considering bead shape and thermal history obtained by weld pool analysis, and then discussed thier influence on the fatigue carack initiation life.
