蠕变-疲劳载荷下高温结构的缺口效应研究进展

发布时间：2018-06-26 21:37

本文选题：蠕变-疲劳 + 缺口效应　；参考：《机械工程学报》2015年24期

【摘要】：随着能源短缺问题的不断突出,高参数(高温、高压等)装备的研发成为工业节能降耗的重要手段,如超超临界汽轮机、航空发动机等高端装备。工程实际中,高参数装备的失效多源于缺口等局部不连续部位,其在蠕变-疲劳等复杂载荷下的强度分析和设计是当前研究的热点与难点。系统回顾了蠕变-疲劳载荷下含缺口构件的试验、本构模型、寿命预测、数值分析及考核准则方面的研究进展,主要包括:蠕变-疲劳载荷下的新本构关系及应用;高温强度和寿命分析的新模型及新方法;简化模型试验方法及蠕变-疲劳强度考核准则。总结这一领域的热点和研究展望,可为高参数装备在蠕变-疲劳等复杂载荷下的强度分析与设计提供一定技术支持与借鉴。
[Abstract]:With the increasing shortage of energy, the research and development of high-parameter (high-temperature, high-pressure) equipment has become an important means of industrial energy saving and consumption reduction, such as ultra-supercritical steam turbine, aeroengine and other high-end equipment. In engineering practice, the failure of high-parameter equipment is mostly due to local discontinuities such as notches. The strength analysis and design of high-parameter equipment under complex loadings such as creep-fatigue is a hot and difficult research topic at present. In this paper, the research progress in the tests, constitutive models, life prediction, numerical analysis and assessment criteria of notched members under creep-fatigue loading is reviewed systematically, including: the new constitutive relation under creep-fatigue load and its application; New model and new method of high temperature strength and life analysis, simplified model test method and creep-fatigue strength test criterion. The hot spot and research prospect in this field can provide some technical support and reference for strength analysis and design of high parameter equipment under complex loadings such as creep-fatigue.
【作者单位】：华东理工大学机械与动力工程学院;华东理工大学承压系统与安全教育部重点实验室;
【基金】：国家自然科学基金资助项目(51325504,51475167)
【分类号】：TG115.57

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