Fatigue crack growth prediction for small-scale yielding (SSY) and non-SSY conditions

Autor:	Nian-Zhong Chen, Jianxing Yu, Ankang Cheng, Yongchang Pu
Rok vydání:	2020
Předmět:	Global energy Materials science Scale (ratio) Mechanical Engineering Fracture mechanics Mechanics Paris' law Strain hardening exponent Governing equation Industrial and Manufacturing Engineering Stress (mechanics) Mechanics of Materials Modeling and Simulation General Materials Science Test data
Zdroj:	International Journal of Fatigue. 139:105768
ISSN:	0142-1123
Popis:	A model to predict fatigue crack growth (FCG) for small-scale yielding (SSY) and non-SSY conditions where J -integral applies is established. The Δ J -characterized elastic-plastic fracture mechanics (EPFM) analysis is performed based on a rearranged FCG process to achieve the crack-tip geometry and stress state. The root stress of blunted crack and the FCG rate are calculated from the cycle-wise local and global energy balance. To consider effects of geometry, load level and strain hardening, a correction factor is further developed in the governing equation of global energy balance. The model is validated using the test data of several types of metals.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9ab35314427879b1fc663a4818b3d4e4 https://doi.org/10.1016/j.ijfatigue.2020.105768 Zobrazit plný text záznamu Full Text from ScienceDirect