A DAMAGE  MODEL OF LIFE PREDICTION UNDERCREEPFATIGUE INTERACTION

Acta Metallurgica Sinica (English Letters) ›› 1999, Vol. 12 ›› Issue (1): 31-35.

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A DAMAGE MODEL OF LIFE PREDICTION UNDERCREEPFATIGUE INTERACTION

Author N. Wang, B.S. Zhou, Z.D. Wang and D.D. Wu College of Mechanical Engineering, East China University of Science and Technology, Shanghai 200237, ChinaManuscript received 18 October 1998

Received:1999-02-25 Revised:1999-02-25 Online:1999-02-25 Published:2009-10-10

Abstract

Abstract: Based on the fundamental definition of damage and inelastic strain energy hypothesis, this paper presents an inelastic strain energy damage model under creepfatigue interaction condition, with the damage constitutional equations and life prediction formulae respectively described by strain and stress. Creepfatigue tests with notchedbar specimens were carried out at 550. The actual creepfatigue lives are in good agreement to the predicted lives according to inelastic strain energy damage model.

Key words: damage mechanics, inelastic strain energy, creepfatigue interaction, life prediction

Author N. Wang, B.S. Zhou, Z.D. Wang and D.D. Wu College of Mechanical Engineering, East China University of Science and Technology, Shanghai 200237, ChinaManuscript received 18 October 1998. A DAMAGE MODEL OF LIFE PREDICTION UNDERCREEPFATIGUE INTERACTION[J]. Acta Metallurgica Sinica (English Letters), 1999, 12(1): 31-35.

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A DAMAGE MODEL OF LIFE PREDICTION UNDERCREEPFATIGUE INTERACTION

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