钢铰线应力松弛率试验计算表

905275-1.47712125540.066666667192.21210.222124169-0.653404183-1.17609125980.133333333192.13730.260953073-0.583437584-0.875061263150.25192.05520.303571429-0.517739106-0.602059991300.5191.97430.34556686-0.461467913-0.301029996601191.90520.381436877-0.4185773220/2191.81180.429921096-0.3666112430.301029996/4191.71250.481468023-0.3174325510.602059991/6191.69890.488527824-0.3111106960.77815125/24191.47770.603353405-0.2194282321.380211242/48191.29350.698972176-0.1555401121.681241237/96191.14950.773723007-0.1114144891.982271233/120191.1000.799418605-0.0972257492.079181246自动计算步骤外推公式:logρ=Alogt+B式中A=0.170059921B=-0.437668675回归方程相关系数R=外推时间t(h):1000logt=3则logρ=0.072511088结果1000h应力松弛值:1.18%1000h应力松弛值用120h的松弛试验值按logρ=Alogt+B进行外推,相关系数R=说明:外推相关系数R宜大于0.96,才能说明相关性较好,可以使用该公式外推。四川正达检测技术有限公司0.997于是ρ=1.18%0.997