TITLE:
Numerical Analysis of Stresses on Layer-by-Layer Basis in FML Composite Cylinder Subjected to External Hydrostatic Loading
AUTHORS:
B. G. Sumana, H. N. Vidya Sagar, K. V. Sharma, M. Krishna
KEYWORDS:
FML Cylinder, External Hydrostatic Loading, Residual Stress, Von-Mises Stress, Radial Stress
JOURNAL NAME:
Materials Sciences and Applications,
Vol.6 No.6,
June
4,
2015
ABSTRACT: The aim of the research work was to numerically investigate the residual stresses induced between
the layers of fiber metal laminate (FML) cylinder (glass/epoxy reinforced aluminum laminates)
under buckling hydrostatic loading. For the analysis of buckling behavior of FML cylinders,
various fiber orientations such as 0/90°, 60/30°, ±45° and ±55° and different FRP thickness of 1, 2,
and 3 mm were considered. The aluminum cylinder of inner diameter 80 mm, length 800 mm and
wall thickness 1 mm was modeled with SHELL281 element type and a total of 1033 elements were
used for computing the induced residual stresses between the layers. The results show that magnitude
of residual stresses between the layers decreased along the thickness from outer layer towards
the inner layer in sine wave form. The maximum residual Von-Mises stress was at inner
aluminum layer while the maximum residual radial stress was at the outermost layer of FML cylinder
due to the inward pressure. Among all types of FML cylinder 0/90° fiber oriented FML cylinder
exhibited the least radial stress and a maximum Von-Mises stress along the FRP thickness.