Toughening of epoxies via craze‐like damage
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The fracture behavior of a core‐shell rubber (CSR) modified epoxy is investigated using both fracture mechanics and microscopy tools. The CSR‐modified epoxy is found to be toughened via numerous line‐array cavitations of the CSR particles, followed by plastic flow of the epoxy matrix. The toughening effect via the above craze‐like damage process is found to be as effective as that of the well‐known widespread rubber cavitation/matrix shear yielding mechanisms. The conditions for triggering the craze‐like damage appear to be both stress state and rubber concentration dependent. The type of rubber tougheners utilized also plays a critical role in triggering this rather unusual craze‐like damage in epoxy systems. © 1993 John Wiley & Sons, Inc. Copyright © 1993 John Wiley & Sons, Inc.
author list (cited authors)
Sue, H., Garcia‐Meitin, E. I., & Orchard, N. A.