Effect of load ratio on fatigue crack growth in the near-threshold regime: A literature review, and a combined crack closure and driving force approach

Autor:	Shan-Tung Tu, Fu-Zhen Xuan, Ming-Liang Zhu
Rok vydání:	2015
Předmět:	Near threshold Crack closure Materials science Mechanics of Materials business.industry Mechanical Engineering Crack tip opening displacement General Materials Science Structural engineering Paris' law business Crack growth resistance curve Load ratio
Zdroj:	Engineering Fracture Mechanics. 141:57-77
ISSN:	0013-7944
Popis:	The current state of influence of load ratio, R, on fatigue crack growth (FCG) behavior is thoroughly reviewed. Two main approaches, including crack closure concept and driving force parameter method, when used independently, are found to be short of accuracy during load-shedding procedure in the near-threshold regime. By combining an equivalent driving force model and crack closure approach, a new crack opening equation and a general FCG law is established for the load-shedding technique. This merging method does not involve crack closure measurement, and is capable to predict R dependence of FCG curves and fatigue thresholds fairly well.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::84c28871d31d717616594c17168972c2 https://doi.org/10.1016/j.engfracmech.2015.05.005 Zobrazit plný text záznamu Full Text from ScienceDirect