CAJ | 학술논문

通过对带有已知预制裂纹试块的检测曲线进行分析,提出了一种评定应力集中的方法——3σ方法。如果x服从正态分布,式μ=x±3σ具有概率含义:测定结果x落在(μ-3σ,μ+3σ)区间的概率为99.73%,概率不随σ的改变而改变。如果磁场强度变化曲线在(?μ-3σ?,+∞)内,就认为此部位有应力集中。3σ方法更加符合统计学规律,对缺陷的判断也更符合实际情况。
통과대대유이지예제렬문시괴적검측곡선진행분석,제출료일충평정응력집중적방법——3σ방법。여과x복종정태분포,식μ=x±3σ구유개솔함의:측정결과x락재(μ-3σ,μ+3σ)구간적개솔위99.73%,개솔불수σ적개변이개변。여과자장강도변화곡선재(?μ-3σ?,+∞)내,취인위차부위유응력집중。3σ방법경가부합통계학규률,대결함적판단야경부합실제정황。
This paper proposed a method to determine the stress concentration based on analysis of the testing curves of plates with prefabricated flaws.This method is based on the statistical theory.If x obeys the normal distribution,μ=x±3σ has probable meaning.It means that if x falls on interval(μ-3σ,(μ+3σ)),the probability is 99.73%.During the magnetic memory testing,if the strength of magnetic field is within(∣μ-3σ∣,+∞),it means there are stress concentration in this area.It is more accurate to find defects by th...