Title: THE EFFECT OF NANOCALCITE ON THE MECHANICAL PERFORMANCE OF FILAMENT-WOUND COMPOSITE OVERWRAPPED PRESSURE VESSELS
Abstract: A study was undertaken to investigate the effect of nanocalcite matrix modification on Composite Overwrapped Pressure Vessels (COPVs). Type III carbon fiber composite overwrapped pressure vessels were prepared via filament winding using a conventional unfilled epoxy matrix as a control material and an epoxy matrix resin modified with surface-treated nanocalcite particles at 35 % by weight. The COPVs were evaluated for burst pressure, burst pressure after impact damage, and cyclic fatigue life. The results show that the modification of the filament winding matrix resin with nanocalcite improved burst pressure relative to the unmodified control resin, and that an improvement was also measured for burst of COPVs after impact damage. In addition, significantly improved cyclic fatigue life was demonstrated for pressure vessels made using the nanocalcite-modified resin. The higher performance demonstrated for a given design suggests that use of nanocalcite-modified matrix resin could enable improved margins of safety, qualification at increased burst and lifetime ratings, or redesign to reduce COPV weight and cost.
Authors: Emily Goenner, Kris Thunhorst, Douglas Goetz, Amit Patel, James Nelson
Conference: CAMX 2017 –Orlando