| 要旨 |
The evolution of plasticity and fracture under constant, but different stress levels is investigated to study the time-dependent deformations of PVA-ECC under high-stress levels. The elastic deformation in cracked ECC is found to be a good indicator that reflects the rate of plasticity and fracturing. Creep rupture in tension and compression is predicted to occur at stress levels 75% and at the same order of time exposure in a log scale. From 75% to 90% stress levels, the deformations at rupture are predicted to be 1.1-1.4, and 1.6-3.5 times of those under static tension and compression |