Creep fracture parameter C* solutions for semi‐elliptical surface cracks in plates under tensile and bending loads. Issue 1 (4th October 2021)

• Record Type: Journal Article
• Authors: Wang, Kai; Wang, Guozhen; Tu, Shantung; Xuan, Fuzhen
• Is Part Of: Fatigue & fracture of engineering materials & structures. Volume 45:Issue 1(2022)
• Page Start: 3
• Page End: 21
• Publication Date: 2021-10-04
• Subjects: creep fracture parameter C* -- finite element analysis -- influence function -- plate -- surface crack; Materials -- Fatigue -- Periodicals; Fracture mechanics -- Periodicals; 620.1123
• DOI: 10.1111/ffe.13576
• Languages: English
• ISSNs: 8756-758X

Abstract

Abstract: In order to predict and assess creep life for plate structures with semi‐elliptic surface cracks under high temperature condition, the accurate calculation of the creep fracture mechanics parameter C* is a critical step. In this paper, the effects of crack sizes, plate geometries, and material creep properties on the parameter C* have been investigated under tensile and bending loads by extensive finite element analyses. Based on the results, the creep influence functions Hc for calculating C* values were obtained and fitted into equations for surface cracks in plates under both loads. The equations have been verified by finite element calculations. The C* solutions were obtained through these equations which are suitable for wide ranges of crack sizes, plate geometries, and materials.