Influence of Moisture and Low Temperature on Notched Izod Impact Toughness in a Pultruded Reinforced Composite

摘要

A preliminary assessment was made of the influence of low temperature on the impact-generated fracture of a commercial glass-reinforced polymer composite produced by the pultrusion process. Impact tests were performed using an Izod testing machine on the composite specimens with a V-notch resulting in a fracture surface parallel to the fiber direction. Tests were conducted at 25° -5° -25°, and -50°C on both dry (as received) and wet (submerged for 12 hours) specimens. This paper reviews the existing data in the literature on low temperature fracture behavior of composites and compares the data obtained from these tests. Special emphasis was given to the influence of subzero temperatures on fracture behavior.