PSI - Issue 66

Mohammad Jameel Ziedan et al. / Procedia Structural Integrity 66 (2024) 229–246 Author name / Structural Integrity Procedia 00 (2024) 000–000

238

10

angle with higher vacuum pressure and compaction force between diaphragms, which impacts deformation limits and wrinkling initiation during the forming process, as shown in Table 7.

Fig. 9. Diffusion time to achieve a void free laminate for 1-72 layer laminates (V v = void volume) (Zhang et al., 2022)

Fig. 10. Schematic DVB assembly (Hou & Jensen, 2018).

Name

Processing condition

Total compaction pressure during curing (bar)

VB

Vacuum bagged

1

VB3T VB5T VB8T

Vacuum bagged , 3 ton compaction Vacuum bagged, 5 ton compaction Vacuum bagged, 8 ton compaction

5.7 8.9

13.6

Table 6. Specimens nomenclature (Francucci et al., 2018).

Fig. 11. Micrographs of the samples: (a) VB, (b) BV3T, (c) VB5T, and (d) VB8T (Francucci et al., 2018).