摘要
讨论了在小范围屈服条件下裂纹尖端塑性区的修正，指出了Ｉｒｗｉｎ经典模型的不足并对其进行了改进，给出了考 虑材料强化效应并采用裂纹尖端应力场精确解后的裂尖塑性区大小计算公式。通过改进后的结果与Ｉｒｗｉｎ经典模型结 果的比较，表明本工作使Ｉｒｗｉｎ模型更为合理和准确。
The correction of plastic zone ahead of crack tip in the case of small scale yielding is discussed. The deficiencies of Irwin classical model are pointed out and an improvement is suggested. Based on the exact solution of stress field ahead of crack tip and hardening of materials, the improved formula of plastic zone size is presented. The comparison between results of the improved formula and those of Irwin model indicates that the improved formula is more reasonable and accurate than Irwin classical model.
出处
《轻合金加工技术》
CAS
2001年第2期15-18,共4页
Light Alloy Fabrication Technology
