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本文引入附加应力的概念,并考虑材料强化的影响,对小范围屈服理论进行探讨。导出了考虑材料强化时裂纹尖端的平移距离r_y和应力强度因子K_1的修正公式。按该公式计算的结果更接近Duffy公式计算结果。
This article introduces the concept of additional stress, and considers the influence of material reinforcement, and discusses the small-range yield theory. The correction formula for the translational distance r_y and the stress intensity factor K_1 at the crack tip when considering material strengthening is derived. The result calculated by this formula is closer to the Duffy formula calculation result.