Abstract:
In this study, we focus on the hybrid composite design for the increased open hole performance and
to evaluate the inter-ply hybridization effects on open hole failure mechanisms. The purpose of this
project is to design a low-cost hybrid composite with the increased durability and performance
under tensile loadings. Hole is been introduced in the samples because there are holes in the
automotive industry and aerospace industry for the purpose of bolted joints and inspection. For this
purpose, vacuum bagging technique to manufacture the composite plates which are then cut out
with band saw machines according to the ASTM standard D5766 for the testing. Then samples are
been tested on the UTM along with the Digital Image Correlation performed for the contours of
deformation to evaluate the critical point for the stress concentration during the loading. In addition,
Optical Microscopy is performed to evaluate the fiber delamination (failure) during the loading.
Then critical portion of the fractured samples are evaluated through SEM (Scanning Electron
Microscopy) for the evaluation of crack propagation during the entire curve. Load deformation
curve through UTM reveals that hybrid sample HCBBC exhibit the ductile behavior which prevents
crack propagation and hence great performance and durability in comparison to other configurations
Pure carbon, Pure Basalt and HBCCB.
