通过对不同厚度耳片应力集中系数的计算及分析，得出了耳片最大周向应力集中系数及最大切向应力集中系数随厚度的变化规律曲线。
The curves of lugs' maximal circumferential and tangent stress concentration factors with different thickness are got by calculating and analyzing the corresponding concentration factors of lugs.
钢管周向和径向的应力值不大，而轴向应力值较大，最大轴向应力出现在钢管与芯模的接触部位。
The axial stress on the steel tube which appears on the contact region of the steel tube and mandril is larger than the radial and circumferential stress.
钢管周向和径向的应力值不大，而轴向应力值较大，最大轴向应力出现在钢管与芯模的接触部位。
The axial stress on the steel tube which appears on the contact region of the steel tube and mandril is larger than the radial and circumferential stress.
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