Low-velocity impact performance of nanoflber-interlayered aramid/epoxy nanocomposites

摘要

Low-velocity impact response of aramid/epoxy laminates containing nano-interlayers with different amounts of the thickness (17.5, 35, and 70 mu m) and various stacking configuration (back-side, central, and two-sides interleaving) has been studied. A hand lay-up method was used for making composites. Instrumented impact tests were compared with quasi-static indentation tests by using the same specimen and test configurations. The results show that generally, quasi-static indentation analysis is sufficient to assess the impact response of interleaved composite only until a certain impact energy level. However, the optimum thickness of interleaves for obtaining the highest value of toughness for interleaved composites is 35 mu m. Moreover, the behavior of backside configuration was similar to static tests in impact tests, but other configurations almost did not follow this trend.