Research Article
Experimental Observation on the Pure Torsional Ratchetting of Polycarbonate Polymer at Room Temperature
Table 2
Stress-controlled cyclic loading cases1.
| | Loading cases | Mean stress (MPa) | Stress amplitude (MPa) | Peak hold time (s) | Stress rate (MPa/s) |
| | Stre1 | 15 | 30 | 0 | 1 | | Stre2 | 25 | 30 | 0 | 1 | | Stre3 | 25 | 30 | 60 | 1 | | Stre4 | 35 | 30 | 0 | 1 | | Stre5 | 35 | 30 | 10 | 1 | | Stre6 | 35 | 30 | 60 | 1 | | Stre7 | 35 | 30 | 0 | 10 | | Stre8 | 30 | 15 | 0 | 1 | | Stre9 | 30 | 25 | 0 | 1 | | Stre10 | 30 | 35 | 0 | 1 | | Stre11 | 35 ⟶ 25 ⟶ 35 | 30 | 0 | 1 | | Stre12 | 25 ⟶ 35 ⟶ 25 | 30 | 0 | 1 | | Stre13 | 30 | 35 ⟶ 25 ⟶ 35 | 0 | 1 | | Stre14 | 30 | 25 ⟶ 35 ⟶ 25 | 0 | 1 |
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1Note: 50 cycles for every load case without stress history (i.e., Stre1–Stre10) and 90 cycles for that with stress history (i.e., Stre11–Stre14).
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