介绍了金属延性动态损伤的微孔生长模型的研究方法和一般内容。
The studying method and the general contents of microvoids growth models for dynamic ductile damage of metals are introduced and the newest models are evaluated.
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.
在其他条件都相同而核心区配箍率不同的情况下，核心区配箍率越小其损伤值越大，其延性也越差。
If the rate of stirrup used in core area is smaller and the damage is larger, the ductility is worse.
在复杂应力状态下延性金属材料的塑性损伤依赖于加载路径。
Plastic damage of ductile metals under complex stress depends on loading path.
当损伤程度达到严重时，加固后的结构延性减小。
The ductility is less when the damaged degree of strengthened structure is critical.
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.
通过比较两种不同的损伤模型，建议采用一个基于延性系数的损伤模型。
Comparing two types of damage model, it is proposed to adopt the model based on the ductility coefficient.
经实测数据与所建模型对比验证，延性破坏、脆性破坏模式本构模型精度较高，可为岩石损伤评估提供依据。
Proved by the test data, the precision of constitutive model with brittle, ductile failure is higher, which can provide accurately the basis for rock damage assessment.
通过考虑材料微观塑性损伤，定量研究了焊接接头中强度匹配、试件几何形状对接头抗延性裂纹扩展行为的影响。
The effects of strength mis-matching and specimen geometry on the resistance behavior to ductile crack growth for welded joint were conducted by 3-D FE analysis considering the micro-plastic damage.
此外，基于延性系数和典型地震损伤评价方法，运用HRB400级钢筋混凝土柱的试验结果对柱进行损伤评价，并与试验结果做比较。
Moreover, experimental results of HRB400 grade reinforce concrete columns were used to value the damage of columns based on the method of ductility coefficient and classic damage evaluation.
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.
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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