期刊
ENGINEERING FRACTURE MECHANICS
卷 136, 期 -, 页码 131-141出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2015.01.021
关键词
Fracture; Aluminum alloys; Plasticity; Cracks; Stress-intensity factor; Finite elements; CTOA
类别
Elastic-plastic finite-element analyses employing the critical crack-tip-opening-angle (CTOA) fracture criterion were used to simulate fracture on thin-sheet middle-crack-tension, M(T), specimens made of several aluminum alloys over an extremely large range of widths (18-5700-mm) for a wide range in crack-length-to-width ratios. A linear relation between elastic stress-intensity factor (K-Ie) and net-section stress (S-n) at failure was observed for Sn less than yield stress of the material. Test data on two aluminum alloys (2024-T3 and 2219-T87) over a wide range of M(T) specimen widths (76-600-mm and 76-1200-mm, respectively) supported the linear relationship that validated the Two-Parameter Fracture Criterion. (C) 2015 Elsevier Ltd. All rights reserved.
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