Effect of interlayer dry area extent and interlaminar delamination on the tensile strength of composite plates manufactured by vacuum infusionprocess

If the infusion strategy in Vacuum infusion process (VIP) is not followed according to the recommendedprocedures, the resin might not be able to reach some fibers of the composite plate leading to development of patches ofdry regions in the composite plate. In this research, six types of ۴-ply glass/epoxy composite plates were manufactured.In the first type, no dry region was created in the whole composite plate. In the second type, parts of the first ply, in thethird type, parts of the first and second plies, in the fourth type, parts of the first, second, and third plies, and in thefifth type, parts of all the plies were kept dry. In the sixth type of composite plate, a delamination between the secondand first layers was induced. The results showed that the presence of dry areas decreases the tensile strength for ۱۲-۳۴%, while the induced delamination decreases the tensile strength for ۱۳%.