拉伸屈服极限 meaning in Chinese

tensile yield limit

After pretorsion the successor tensile yield limit and strength limit both improved very highly , but the trend of the increase of the strength limit was suspended till the pretorsional capacity reached 17 , when the pretorsional capacity was greater than17 ( prestrain value was 81 . 19 % of total strain ) , the successor strength limit rapid failed and approached the yield limit . this illustrate the a3 steel specimen translate from plasticity into friability after pretorsion strengthen . when the specimen was operated by tension - torsion action , the yield limit had very large improved , but the strength limit changed very little . furthermore , the trend of the increase of the strength limit was suspended till the pretension capacity reached 0 . 25 ( prestrain value was 66 . 93 % of total strain )
A3钢试件在预扭转后，后继拉伸屈服极限和强度极限均有很大提高，但强度极限的增大趋势到预扭转量为17为止，预扭转量大于17 (预应变值为总应变的81 . 19 )后强度极限迅速下降，与其屈服极限接近，这说明a3钢试件经预扭转强化后逐渐由塑性转化为脆性。该预应变值为a3钢试件的韧脆转变点。 a3钢试件在拉伸-扭转作用下，屈服极限有很大提高，但强度极限没有多大改变，而且，屈服极限的增大趋势到预拉伸量为0 . 25应变(预应变量为总应变量的66 . 93 )后就不再增加。