2.2 Symbols

The basic symbols and their meanings used in this standard are as thefollowings.F applied forceM momentP pressureN powerm massq discharge quantityQ flow rateE modulus of elasticityG shear modulusσ normal stressτ shear stressσs yield strengthσb tensile str ......（本文共 500 字 ）     [阅读本文]>>