钢铰线应力松弛率试验计算表

,,钢铰线应力松弛120h外推1000h计算表GB/T21839-2008,,,,,,,,,

,使用说明：请在白格内输入数据即可！,时间t,,力(kN),松张率ρ,logρ,logt,,,,

,,分（min）,小时(h）,,,,,,,,

,,0,0,192.64,0,,,,,,

,,1,0.016666667,192.3074,0.172653654,-0.762824225,-1.77815125,,,,

,,2,0.033333333,192.2643,0.195026993,-0.709905275,-1.477121255,,,,

,,4,0.066666667,192.2121,0.222124169,-0.653404183,-1.176091259,,,,

,,8,0.133333333,192.1373,0.260953073,-0.583437584,-0.875061263,,,,

,,15,0.25,192.0552,0.303571429,-0.517739106,-0.602059991,,,,

,,30,0.5,191.9743,0.34556686,-0.461467913,-0.301029996,,,,

,,60,1,191.9052,0.381436877,-0.418577322,0,,,,

,,/,2,191.8118,0.429921096,-0.366611243,0.301029996,,,,

,,/,4,191.7125,0.481468023,-0.317432551,0.602059991,,,,

,,/,6,191.6989,0.488527824,-0.311110696,0.77815125,,,,

,,/,24,191.4777,0.603353405,-0.219428232,1.380211242,,,,

,,/,48,191.2935,0.698972176,-0.155540112,1.681241237,,,,

,,/,96,191.1495,0.773723007,-0.111414489,1.982271233,,,,

,,/,120,191.100,0.799418605,-0.097225749,2.079181246,,,,

,,,,,,,,,,,,

,,自动计算步骤,外推公式：logρ＝Alogt+B,,,,,,,,

,,,式中A＝,0.170059921,B＝,-0.437668675,回归方程相关系数R＝,,,0.997,

,,,外推时间t（h):,1000,logt=,3,则logρ＝,0.072511088,于是ρ＝,1.18,%

,,,,,,,,,,,,

,,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＝,,,,,,,0.997,

,,,,,,,,,,,,

,,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,,,,

,,,,,,,,,,,,

,,,,,,,,,,,,

,,,,,,,,,,,,

,,,,,,,,,,,,

,,,,,,,,,,,,

,,,,,,,,,,,,

,,,,,,,,,,,,

,,,,,,,,,,,,

,,,,,,,,,,,,