Characterising the mode-I and mixed-mode I/II delamination behavior of Zr/Ti/steel trimetallic clad plate by experiment and finite element method

Autor: B.J. Zhang, Bin-Bin Zhou, C. Ye, Xiao-Hua He, Chang-Yu Zhou, Le Chang
Rok vydání: 2018
Předmět:
Zdroj: Theoretical and Applied Fracture Mechanics. 95:59-72
ISSN: 0167-8442
Popis: This paper presents the results of mode-I and mixed-mode I/II delamination of Zirconium-Titanium-Steel clad plate by experiment and CZM (cohesive zone model) method. DIC (Digital Image Correlation) method was also used to make comparisons with CZM method in characterizing the strain field on specimen surface. Systematic parametric studies were carried out to investigate the efforts of various material and geometrical parameters. It is founded that the results of strain by DIC and CZM simulations show the same trend, but the value by DIC is sometimes lower or higher than the numerically obtained one. The results show that under different loading conditions, the interfacial resistance of the metal clad plate is of great difference, the interface loading capacity of mode-I is much smaller than that of mixed-mode I/II and Tn (strength perpendicular to the interface) of mode-I is much lower than that of mixed-mode I/II in cohesive model. The different parameters of the CZM affect the trend of the load-displacement curve at different stages for two modes. Fractographic examination shows that the shear force acts vertical to the direction of the wave, and the main morphologies of interfacial fracture are characterized by partial slip bands and dimples, which is attributed to the wave bonding characteristics of the interface of the metal clad plate. The work provides a fundamental mechanistic understanding of the fracture mechanisms in Zirconium-Titanium-Steel clad plate.
Databáze: OpenAIRE
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