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首页> 外文期刊>Journal of thermal stresses >A criterion-selection diagram for the thermal shock resistance of a hollow circular cylinder
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A criterion-selection diagram for the thermal shock resistance of a hollow circular cylinder

机译：中空圆柱体的耐热冲击标准选择图

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摘要

The characteristics of thermally induced failure are investigated for a hollow circular cylinder exposed to a convective cooling at the inner surface. The transient fields of both temperature and thermal stresses are given in closed forms over the full range of Biot number. The thermal shock resistance (TSR) is analyzed based on two distinct failure criteria. Namely, the strength-based failure criterion is adopted for a nearly flaw-free cylinder while the fracture toughness-based one is used for the counterpart with an inner crack-like flaw. From each criterion, the admissible maximum temperature drop is obtained assuring that a hollow cylinder can tolerate without failure. The influence of flaw size on the TSR is quantified and a criterion-selection diagram is proposed for the TSR characterization. These results are deemed to be of importance from the perspective of estimating the TSR of a hollow circular cylinder.
机译：对于内表面受到对流冷却的中空圆柱，研究了热诱导失效的特征。温度和热应力的瞬变场在毕奥数的整个范围内以封闭形式给出。基于两个不同的失效标准来分析抗热震性（TSR）。即，对于几乎没有缺陷的圆柱体，采用基于强度的破坏准则，而对于具有内部裂纹状缺陷的配对体，则采用基于断裂韧性的准则。根据每个标准，可以确保中空圆柱体能够无故障地承受容许的最大温度下降。量化了缺陷尺寸对TSR的影响，并提出了用于TSR表征的标准选择图。从估计空心圆柱的TSR的角度来看，这些结果被认为是重要的。

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