Fatigue and Creep Life Prediction Method for Plastic Materials

Abstract

Due to visco-elastic properties of plastic materials, fatigue and creep life depends on load history. This dependency leads to low accuracy of life estimation by Miner rule which well explains fatigue life of metal materials. New life estimation method, was proposed, which takes visco-elastic properties into consideration. It is found that this method is effective for both fatigue and creep life estimation and well explains the dependency of life on load history.