用红外热成像系统实时监测了高强度压力容器在工作压力下的疲劳打压过程．在疲劳循环初始由热图获得的ＩＲＣＥ效应，可以确定压力容器的应力集中区域。打压泄漏的位置证明，由热图测定应力集中区域是可行的。实验发现压力容器疲劳软化和硬化效应，采用Ｇｌｏｇａｌ座标对筒状薄壁压力容器的应力分布计算表明，热图和计算的结果是吻合的。实验证明，在工作压力下的疲劳锻练效应将会延长压力容器的使用寿命。
An infrared thermographic system was used to monitor the process of fatigue compressing of high strength steel pressure vessel under working pressure. The IRCE effect obtained by themography at the beginning of fatigue testing can detemine the stress concentrated areas. The leaks in the vessel under compressing may testify that the examination of the stress coneentrated area by thermography is available. The fatigue softening and hardening effect was found in the tests.The thennographic results for the stress distribution of cylindrical thin-wall pressure vessel is in agreement with that computed by the Glogal coordinate system. It is believed that the fatigue exercise effect under working pressure may prolong the working life of the pressure vessel. Correspondent: HUANG Yi,associate professor, Institute of Metal Research, Chinese Academy of Scicnces, Shenyang 110015
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