Fiber micro-buckling of continuous glass-fiber reinforced hollow-cored recycled plastic extrusions under long-term flexural loads

摘要

Exspeimental results on fiber micro-buckling of continuous glass-fiber reinforced hollow-cored recycled plastic extrusions under creep tests are introduced in the paper. the full size specimens with dimensions in 2.5 × 3.5×42 in. Were submerged in warm water at a temperature of 125°F when they were under a four-point bending creep test. The results show that the micro-buckling of the embedded glass-fiber roving occurs along 90/100 the length of the specimen on the upper inner surface (compressive side) and mainly during the time between 5 and 100 h from the initial loading moment.