焊缝收缩诱发的局部应变时常达到屈服点应变的数倍，比荷载引起的应变大得多；
Weld shrinkage-induced local strain to yield point strain often several times, than the strain due to the load is much larger;
屈服点是在应变有可观增加，应力没有增加的应力极限，在这个极限下，如果应变继续增加，应力就也会增加。
The yield point is the stress at which there is an appreciable increase in strain with no increase in stress, with the limitation that, if straining is continued, the stress will again increase.
如该设计基于应变硬化性能，设计应力通常在HAZ实际屈服点以上。
If the design is based on the strain hardened properties, the allowable design stress will usually be above the actual yield point of the HAZ.
当应力达到屈服点，应变会急剧增大而应力保持不变。
When the stress reaches the yield point, a large increase in strain occurs with no increase in stress.
结果表明 ：其应力—应变曲线表现出屈服点低、连续屈服、没有明显的屈服点等特性 ；
The stress strain curves displayed the characteristics of low yield point, continuous yield and no obvious yield point.
结果表明 ：其应力—应变曲线表现出屈服点低、连续屈服、没有明显的屈服点等特性 ；
The stress strain curves displayed the characteristics of low yield point, continuous yield and no obvious yield point.
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