A node release approach to estimate J‐R curve for single‐edge‐notched tension specimen under reversed loading. Issue 7 (5th March 2019)

• Record Type: Journal Article
• Authors: Liu, Tianyao; Qian, Xudong; Wang, Wei; Chen, Yiyi
• Other Names: Pantelakis Spiros guestEditor.; Berto Filippo guestEditor.
• Is Part Of: Fatigue & fracture of engineering materials & structures. Volume 42:Issue 7(2019)
• Page Start: 1595
• Page End: 1608
• Publication Date: 2019-03-05
• Subjects: constraint effect -- crack growth resistance of materials under cyclic loading -- cyclic response -- fracture resistance -- J‐R curve; Materials -- Fatigue -- Periodicals; Fracture mechanics -- Periodicals; 620.1123
• DOI: 10.1111/ffe.13002
• Languages: English
• ISSNs: 8756-758X

Abstract

Abstract: This paper proposes a node release approach to estimate the fracture resistance curve, often known as the J‐R curve, for monotonic and cyclic fracture tests. The node release approach simulates the crack extension by releasing the constraints imposed on the node at the crack tip and estimates the J‐R curve by coupling the domain integral value with the corresponding crack extension. This proposed node release approach estimates closely the J‐R curve for SE(B) and SE(T) specimens subjected to monotonic loading. For SE(T) specimen under cyclic loading, this study implements the node release analysis in two approaches: (1) an equivalent monotonic analysis corresponding to the envelope of the cyclic load‐CMOD response and (2) a direct cyclic simulation. Both approaches lead to close estimations of the experimentally measured J‐R curve. The numerical analysis also confirms the path independence of the domain integral values in the direct cyclic simulation.