To solve the problem of predicting the thermal fatigue
life of A356-T6 cast aluminum alloy cylinder heads, tensile performance tests,
low cycle fatigue tests, creep tests, and thermal fatigue tests were carried
out under the sampling of engine cylinder head body. The material parameters
required for the Sehitoglu model calculation were obtained, and the improved
Sehitoglu model for predicting thermal fatigue life was proposed by considering
the influence of average stress and temperature on material properties. By
comparing the predicted results with those of the Sehitoglu model, the improved
Sehitoglu model had a prediction life within three times the error band, making
it more suitable for predicting the thermal fatigue life of engine cylinder
heads.
FU Yafei, TAO Shuai, JING Guoxi, YU Huichao, DONG Changlong, HUANG Lirong
. Thermal-Mechanical Fatigue Life
Prediction of Cast Aluminum Alloy Based on Improved Sehitoglu Model[J]. Vehicle Engine, 2025
, 0(3)
: 74
-80
.
DOI: 10.3969/j.issn.1001-2222.2025.03.011
