PSI - Issue 41

Ilham Widiyanto et al. / Procedia Structural Integrity 41 (2022) 274–281 Widiyanto et al. / Structural Integrity Procedia 00 (2022) 000 – 000

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Fig. 2 View of benchmarking linear buckling mode shape and nonlinear buckling equilibrium of LR 1.0 cylindrical shell .

3. Finite Element Configuration for Parametric Study 3.1. Idealized Geometry and Material

In this study, the basic model used is a cylindrical shell. The shell cylinder is varied into three geometric models, namely unstiffened cylinder shell (S1), stringer-stiffened cylinder shell (S2), and ring-stiffened cylinder shell (S3). The shell cylinder model is detailed in Fig 3. Each variation of the shell cylinder with different geometries has the same structural weight. That way, each geometry has a different thickness. The cylinder shell has the same length ( l ), which is 2235.2 mm. At the top and bottom of the cylinder shell, mounted shell caps. The size of the cap ( D = 891.2 mm) is larger than the diameter of the shell cylinder, while its thickness is 10 times the diameter of the shell. The shell cylinder that uses stiffener is stringer-stiffened and ring-stiffened. Each model has 4 stiffeners with a stiffener width of w = 90 mm. In the shell stringer-stiffened cylinder shell, the location of the stiffener is along with the shell cylinder. The distance between stiffeners forms an angle. Meanwhile, in the shell cylinder with ring stiffener, the stiffener is located around the shell cylinder. The distance between the ring stiffeners is l 1 = 558.8 mm.

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Fig. 3 Cylinder shell models (a) Unstiffened cylinder shell, (b) Stringer-stiffened cylinder shell, (c) Ring-stiffened cylinder shell.