光弹性测定KⅠ,KⅡ和σox的γ-N曲线斜率法
来源期刊:中南大学学报(自然科学版)1985年第2期
论文作者:伍洪泽
文章页码:25 - 33
关键词:光弹性; 曲线斜率; 等色线图; 测定; 实验值; 关系式; 计算结果; 矩形板; 材料条纹值; 精度高
摘 要:为了了解双轴载荷效应对测定复合型应力强度因子KⅠ,KⅡ的影响,本文提出一个确定KⅠ,KⅡ和σox的γ-N曲线斜率法。即根据等色线图案作出α=±θ的γ-N曲线。采用(N)/(γ)—(K,σox)关系式及(N/γ)值计算KⅠ,KⅡ的实验值。计算结果表明,计及σox时可以提高测定KⅠ,KⅡ值的精度。
Abstract: In order to comprehend the effect of the biaxial-loading on determining the composite stress-intensity factors KⅠ and KⅡ, this paper provides a r-N curve-slope method to determine KⅠ KⅡ and σox, i.e. by describing r-N curve for α=±θ, and applying the relation of N/r-(K, σox) and the N/r values to calculating the experimental values of KⅠ and KⅡ. The result of the calculation shows that the accuracy of determining KⅠ and KⅡ could be raised as σox is also taken into consideration.