φ1000压力容器接管拐角疲劳裂纹扩展试验研究

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该文主要探索一种适用于压力容器高应变区裂纹疲劳扩展的工程计算方法。通过一台φ1000×4500mm带接管的实物压力容器进行疲劳试验。根据实测应变,在推导计算过程中,将接管拐角裂纹简化成无限板边裂纹问题,算出△J经系数F和V修正后得到的△Jeff能很好地描述压力容器接管高应变区的疲劳裂纹扩展速率。 This paper mainly explores a kind of engineering calculation method suitable for the fatigue expansion of crack in high strain region of pressure vessel. Fatigue test was performed by a φ1000 × 4500mm physical pressure vessel with a takeover. According to the measured strain, in the process of deducing and calculating, the corner crack of the takeover tube is simplified to the problem of infinite plate edge crack. The ΔJ calculated by △ J with the coefficients F and V can well describe the fatigue crack in the high strain zone of the pressure vessel Expansion rate.
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