Interlaminar stress calculation in composite and sandwich plates in NURBS Isogeometric finite element analysis

2013 ◽  
Vol 106 ◽  
pp. 537-548 ◽  
Author(s):  
Hitesh Kapoor ◽  
Rakesh K. Kapania ◽  
Som R. Soni
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Sandwich Plates ◽  
Element Analysis ◽  
Interlaminar Stress ◽  
Stress Calculation

scholarly journals Improvement of the coiling stress calculation model for a mandrel-sleeve-coil

2022 ◽  
Vol 14 (1) ◽  
pp. 168781402110704
Author(s):  
Yonghui Park ◽  
Kyutae Park ◽  
Changwoo Lee ◽  
Wei Shi
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Steel Sheet ◽  
Circumferential Stress ◽  
Rolling Process ◽  
Constant Thickness ◽  
Analysis Model ◽  
Element Analysis ◽  
Steel Rolling ◽  
Stress Calculation

The steel rolling process employs a coiling-uncoiling process in which a steel sheet is wound and unwound in a coil shape using a coiler to efficiently produce a long steel sheet with a constant thickness. As front and rear tension is required when the steel sheet enters and exits the rolling mill, the coiler introduces tension in the steel sheet through the control of the rotational speed. As the coil is produced, coiling tension accumulates, and pressure is applied to the inside of the coil. Finite element analysis and stress calculation analysis were derived from previous studies to prevent such pressure increases in the sleeves and coils. However, the radial and circumferential stresses at arbitrary positions inside the coil cannot be accurately determined by considering without the stresses’ difference in the thickness direction based on the assumption that the coil’s thickness is thin. In this study, an analytical model that can accurately calculate the sleeve and coil stress during elastic deformation was established by improving the internal circumferential stress generated when the steel sheet is bent into a coil and the radial stress equation associated with the beam bending theory. In addition, by comparing the finite element analysis model results reflecting the same coiling condition, this model’s validity was verified by confirming the consistency of the results.

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