Abstract
The effect of filler shape and filler volume fraction (micron sized rods, flakes and spheres) on dynamic fracture behavior of particulate polymer composites (PPC) is studied. The mode-I dynamic fracture experiments are carried out on pre-notched glass-filled epoxy specimens. An experimental set-up comprised of a long-bar apparatus to deliver one-point impact loading to an unconstrained specimen, is used in conjunction with a gas-gun. A controlled stress pulse is delivered to the specimen by impacting the long-bar by a striker launched using a gas-gun. A crack propagates into the specimen dynamically and is captured using high-speed photography (~300,000 frames per second). Using the Digital Image Correlation (DIC) method, in-plane displacement fields around the crack tip are determined from the speckle images recorded during the fracture event. With these, dynamic fracture toughness histories are evaluated to examine the filler shape effects. The results show pronounced improvement fracture toughness for all filler types with rod-shaped fillers producing ~145% increase in crack initiation toughness over unfilled epoxy at 15% V f with flakes and spheres showing ~97% and ~67% improvement, respectively.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
