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本文研究了一系列中低强度钢在裂缝扩展过程中的阻力值J_R与δ_R的关系。结果表明,只有通过对阻力值的塑性分量J_P与δ_P的分析,才能找出它们之间关系的合理规律。试验结果指出,在所研究的裂缝扩展范围内,J_R/σ_S—δ_P呈线性关系,这一关系可能受材料特性与试样几何的影响。本文还根据塑性铰链模型,对P-V与P-A曲线之间的相互换算进行了对比分析,结果表明这两种记录曲线实质上是等效的。因此,本文通过广泛的试验,从两个方面证明了J积分与COD的一致性。图9,表11,参考文献15。
In this paper, the relationship between the resistance value J_R and δ_R of a series of low and medium strength steels during crack propagation was studied. The results show that only by analyzing the plastic component of resistance value J_P and δ_P, we can find a reasonable law of the relationship between them. The experimental results show that there is a linear relationship of J_R / σ_S-δ_P within the range of fracture expansion studied, which may be affected by the material properties and the sample geometry. Based on the plastic hinge model, the paper also makes a contrastive analysis of the mutual conversion between P-V and P-A curves. The results show that these two kinds of recording curves are essentially equivalent. Therefore, this article through a wide range of experiments, from two aspects proved the J integral and COD consistency. Figure 9, Table 11, Ref.