Abstract
The fatigue crack growth behavior and its mechanism have been investigated for the particulate filled polyvinyl chlorides (PVC). The results obtained are as follows;
(1) The fatigue crack growth rate of PVC filled with CCR or MBS particles is much influenced by the kind of stabilizers at the same quantity of particles and the same stress intensity factor range, comparing with the effect of the kind of particles on the crack growth rate.
(2) The fatigue crack initiates due to the debonding between matrix and CCR particles or from voids which occurred among aggregate particles of CCR in PVC filled with CCR particles. In PVC filled with MBS particles, it initiates due to the separation of aggregate particles of MBS.
(3) The micromechanism of fatigue crack growth in the materials can be guessed from micromorphology of the fracture surfaces.
