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。

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.

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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。

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

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并进一步对初始损伤孔洞在后续加载中的演化行为的细观有限元力学进行模拟计算及微孔洞初始损伤对钢的延性起裂韧性影响的机理进行了研究。

The mechanism of this effect was further investigated by using finite element method to simulate the evolution of pre-damage voids during the subsequent loading process.

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