Peridynamics study on crack propagation and failure behavior in Ni/Ni3Al bi-material structure

• Published in: Composite structures Vol. 323; p. 117453
• Main Authors: Wu, Wen-Ping, Li, Ze-Zheng, Chu, Xihua
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.11.2023
• Subjects: Crack propagation; Failure; Interface; Ni/Ni3Al bi-material; Peridynamics; Peridynamics; Ni/Ni3Al bi-material; Failure; Interface; Crack propagation
• ISSN: 0263-8223; 1879-1085
• DOI: 10.1016/j.compstruct.2023.117453

In this paper, the crack propagation and failure behavior of Ni/Ni3Al bi-material structure are investigated under the framework of peridynamics (PD). The effects of the location of the pre-crack, the loading rate, and the interface setting of the bi-material structure on the crack propagation path and propagation rate are discussed. The numerical results show that PD method can effectively simulate the whole process of crack propagation and failure characteristics in Ni/Ni3Al bi-material with an interface, and the accuracy of the results is verified by the finite element method. The crack propagation path and failure characteristics strongly depend on the initial location of the pre-crack. Three different crack propagation paths and failure characteristics are found when pre-crack in the Ni phase, Ni3Al phase, and the Ni/Ni3Al interface, respectively. The numerical results also find the interface setting has a significant impact on the crack propagation, when the interface setting with harmonic mean is more capable of hindering crack propagation and reducing crack propagation rate. The present work provides an important reference for the crack propagation and failure of Ni/Ni3Al idealized superalloy and other composites containing complex interfaces.