All specimens′ fracture strain are less than 0.6%, it can not relax stress concentration at notch.
高温和室温的拉伸断裂应变小于0 .6 % ，不能有效地松弛材料切口处的应力集中。
A notch sensitivity factor was derived in order to judge the stress concentration sensitivity of al Li based alloys.
建立了评价铝锂合金应力集中敏感性的缺口敏感因子。
The stress intensity factor of crack can be calculated from the stress concentration factor of corresponding notch when the boundary condition and other geometric conditions are in the same.
在边界条件和其他几何条件相同时，可以通过切口的应力集中系 数求得相应裂纹问题的应力强度因子。
The high stress concentration effect of notch can accelerate the process of fatigue crack nucleation in the notch specimen.
缺口试样在缺口的高应力集中效应下，加快疲劳裂纹形核过程。
It is concluded that the local tensile stress created during quenching process and the stress concentration due to sharp V-shaped notch are the primary reasons of cracking.
认为，淬火过程中产生的局部拉应力加上尖锐V型槽口引起的应力集中是造成开裂的主要原因。
With the increase of notch root radius and the decrease of stress concentration coefficient, the tensile strength decreased.
材料的抗拉强度随着材料缺口半径的增加及应力集中系数的降低而降低。
With the increase of notch root radius and the decrease of stress concentration coefficient, the tensile strength decreased.
材料的抗拉强度随着材料缺口半径的增加及应力集中系数的降低而降低。
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