SHEAR-OUT RESISTANCE IN MECHANICAL JOINTS OF GLASS FIBER-POLYESTER 3D WOVEN SANDWICH COMPOSITE

• Main Author: Baiquni Khawaritzmi, Ahmad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/69035
• Institution: Institut Teknologi Bandung

3D woven sandwich composite has been successfully applied as structural components in various fields, including rail transportation. The application of sandwich composite requires a mechanical joining process. There are two types of loading direction that occur in mechanical joints, called shear-out and pull-out. At the time of joining, optimum shear resistance is required. This research examined the shear resistance of mechanical joints of 3D woven glass-fiberpolyester sandwich composite. The stabilized single-lap shear-out method was used to determine the shear resistance of 3D woven sandwich composites. The testing method was done by varying edge distance-to-hole diameter ration (e/D), width-to- hole diameter ratio (W/D), and the use of inserts. The failure mode observations were made visually, and a stereo-microscope was used to observe the bearingout failure mode damage on specimens without and with inserts. Based on research that has been done, it was found that the offset load, initial peak load, and ultimate load values will increase along with the increase in e/D and W/D. However, the ultimate load value will be constant when e/D and W/D are 3, or the failure mode changes to bearing-out. Mechanical joint that used insert can increase the offset load and ultimate load by 80% and 51%, respectively. Bearing-out failures observed when joints with inserts result in larger damage areas than without inserts. The optimum mechanical joint configuration of the glass fiberpolyester 3D woven sandwich composite can be achieved when the e/D and W/D are minimum 3 using the insert