Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 02, 2019 - November 04, 2019
In fatigue design for transport machinery with complex stress, it is important to consider non-proportional loading. In this paper, a method for prediction of fatigue life considering life degradation by non-proportional loading was applied to fatigue life prediction for welded joints. Fatigue tests were conducted on welded joint specimens under non-proportional loading with planar tri-axial fatigue testing machine. We found that the method recommended by the IIW made it possible to evaluate on the safety side. However, it was shown that the greater non-proportional loading intensity, the greater predicted fatigue live ratio (predicted / measured). On the other hand, we found that the predicted fatigue lives calculated with multi-axial stress were within a factor of 2 against the experimental results.
