Abstract
Fracture toughness of an engineering material is an essential parameter for the damage and the safety assessment of a structure exposed to different loading conditions in applications like defense, automotive, and aircraft structure. In this article, an effort is made to evaluate the fracture toughness of AA7475-T7351 alloy under different loading rates. Single edge three-point bend experiments are conducted at four different loading rates 1 mm/min, 10 mm/min, 100 mm/min, and 1000 mm/min. Quasi-static experiments are conducted using two different electromechanical universal testing machines (Zwick-Roll/Z-50 and MTS). Quasi-static initiation and propagation fracture toughness are evaluated from the load vs. crack mouth opening displacement (CMOD) diagram. It is observed that the fracture toughness of the material increases with the increase of loading rates. The fracture propagation toughness of the material also shows a positive sensitivity towards the loading rates.
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Chakraborty, P., Pandouria, A.K., Kumar, S., Singha, M.K., Tiwari, V. (2022). Initiation and Propagation Fracture Toughness of AA7475-T7651 Under Different Loading Conditions. In: Chalivendra, V., Beese, A.M., Berke, R.B. (eds) Mechanics of Composite, Hybrid and Multifunctional Materials, Fracture, Fatigue, Failure and Damage Evolution, Volume 3. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-030-86741-6_2
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DOI: https://doi.org/10.1007/978-3-030-86741-6_2
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