Role of particle size and filler–matrix adhesion on dynamic fracture of glass-filled epoxy. I. Macromeasurements

Effects of fillers on the fracture behaviour of particulate polyester composites

“…This could be due to the difference in the sizes of the wood flakes used in this study. It has been reported that there is an optimum particulate size to obtain the highest fracture toughness [11]. An increase or decrease in the particulate size decreases the fracture toughness.…”

“…As the volume fraction increases, there could be considerable breakdown of the particulate-matrix interface, i.e. causing pinning is more difficult [11]. Another fracture mechanism is crack tip blunting, where the crack growth is retarded because of particulate debonding (Fig.…”

“…the crack tip is being blunted at discrete locations along the crack front. The crack tip blunting is due to particle debonding, which retards the crack growth and lowers the stress intensification [11,12]; this takes place through localized shear yielding [36,37]. In addition, it is suggested that the high toughness is due to debonding of particles that act as voids, causing more localized energy-absorbing processes, such as plastic deformation [38].…”

“…In other research studies [9,10], it has been reported that increasing the particle size decreased the flexural strength improved the fracture toughness of polymeric composites [10]. Kitey and Tippur [11,12] have studied the effects of the particle size (7-200 mm) on the dynamic fracture of glass-bead-filled epoxy composites. In that research, the elastic properties were unaffected by the particle size and bonding strength.…”

Analysis of the effect of size, amount and surface treatment on the tensile strain of a brittle adhesive reinforced with micro cork particles

“…A good wetting between adhesive and the particles, favouring a strong bond, should be guaranteed [20]. Therefore, particles will act as crack stoppers and not as defects on the matrix.…”