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一、引言 目前在高温构件设计中仍沿用常规持久强度和蠕变极限,但它并不能完全反映构件的实际工作情况。近几年来,在高温构件故障分析中经常碰到按常规性能制造完全合格的构件,往往发生意外的断裂事故,而从故障件上取样复验,上述各项常规指标仍然合格。这说明必须研究更接近实际工作条件下的高温性能。蠕变/疲劳交互作用下的损伤规律就是这类课题之一。
I. INTRODUCTION At present, conventional permanent strength and creep limit are still used in the design of high temperature components, but it does not fully reflect the actual working conditions of components. In recent years, high-temperature component failure analysis often encountered by conventional performance to create fully qualified components, often accidental rupture of accidents, and sampling from the fault re-inspection, the above-mentioned conventional indicators are still eligible. This shows that we must study the more close to the actual working conditions of high temperature performance. The creep / fatigue interaction under the law of damage is one such issue.