Integral Hydro-Bulge Forming of Spherical Vessels: A Numerical and Experimental Study
محل انتشار: مجله شکل دهی مواد، دوره: 10، شماره: 2
سال انتشار: 1402
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 128
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شناسه ملی سند علمی:
JR_IJMF-10-2_002
تاریخ نمایه سازی: 14 شهریور 1402
چکیده مقاله:
The integral hydro-bulge forming (IHBF) process, also called shell hydroforming, is a die-less forming technique used to manufacture hollow parts from preforms made of sheet blanks cut and welded together. In this study, integral hydro-bulging of spherical vessels was investigated both numerically and experimentally. Numerical simulations were performed using Abaqus commercial software, and the numerical results were validated via comparison with those obtained from the experiments. The thickness distribution along the equatorial and meridian paths, sphericity of the formed vessel, and critical fluid pressure at which instability occurs were studied, and the effect of the number of lateral petals was investigated. For this study, an St۱۲ steel sheet with a thickness of ۰.۸ mm was used to make a spherical shell with ۱۲ lateral petals and a diameter of ۴۰۰ mm. The results showed that the use of preforms with more lateral petals leads to a more uniform thickness distribution and shape accuracy in the formation of spherical vessels. Furthermore, by increasing the number of petals from ۸ to ۱۶, the thickness decreased by ۴.۲%. The maximum thickness reduction occurs in the ۸-petal state, and the least thickness reduction occurs in the ۱۲-petal state. The results show that the increase in the number of lateral petals leads to the increase in the critical fluid pressure. By doubling the number of lateral petals, fracture pressure increased by ۷۴% consequently.
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نویسندگان
H. Deilami Azodi
Department of Mechanical Engineering, Arak University of Technology, Arak, Iran
J. Rezaei
Department of Mechanical Engineering, Arak University of Technology, Arak, Iran
A. Zeinolabedin-Beygi
Department of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran
H. Badparva
Department of Mechanical Engineering, Khajeh Nasir al-Din Tusi University of Technology, Tehran, Iran
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