The results showed that with increasing the amount of the initial void damage, the ductile fracture initiation toughness of steel decreases.

研究结果表明，随钢组织在预加载荷中产生的微孔洞初始损伤量的增加，其延性起裂韧性降低。

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By using measurement of mechanical parameters and microscopic observation, the effect of initial damage on the ductile fracture initiation toughness of steel was investigated experimentally.

通过力学参数测量和微观观察研究了初始损伤对钢的延性起裂韧性影响。

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