PSI - Issue 60

Amardeepa KCS et al. / Procedia Structural Integrity 60 (2024) 60–74 Amardeepa KCS/ Structural Integrity Procedia 00 (2023) 000–000

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12.5 PSI as per design. Therefore, the L angle can safely carry the internal fuel pressure of 12.5 PSI without failure at any point around the stringer cut-out region. The strength of each composite layer is computed by the failure index values using modified Yamada-Sun's failure criterion given by Eq-(4). The strains are compared with the global model within appreciable differences.

174°

1.035 mm 38.547mm

162°

(b) stress location between layers 1-2 (25 th row)

(c) stress location between layers 1-2 (13 th row)

(a) stress location between layers 1-2 (25 th row)

12.880mm

12.880mm

12.41 mm

11.38 mm

(d) stress location between layers 1-2 (13 th row)

(e) stress location between layers 1-2 (13 th row)

Fig. 26. Stress location at zone 3 and 4

Fig. 27. Strain comparison of global wing/wing box and standalone L angle model

1 st layers FI

nd

2

layers FI