| 用应变能法研究模具钢的热疲劳性能 |
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| 引用本文： | 施占华,汤继跃,李熙章,肖钟义,王海清,郭秀芬. 用应变能法研究模具钢的热疲劳性能[J]. 安徽工学院学报, 1988, 0(2) |
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| 作者姓名： | 施占华 汤继跃 李熙章 肖钟义 王海清 郭秀芬 |
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| 作者单位： | 华中工学院，华中工学院，华中工学院，华中工学院，北京航空材料研究所，北京航空材料研究所 |
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| 摘 要： | 本文提出的应变能法是采用能量损伤观点对 Manson-Coffin的应变幅——寿命法(M-C公式)的修正,用以予测热作模具钢5Cr2NiMoVSi、5CrNiMo的热疲劳的寿命。该法指出热疲劳寿命不但是非弹性应变幅△ε_(in)的函数,而且也是平均拉应力σ的函数,即材料的热疲劳寿命是强度和塑性的综合性能指标。使用应变能法予测热疲劳寿命时,实验结果与实际模具的使用寿命相吻合,而用 M-C公式予测则有时和实际情况相反。
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| 关 键 词： | 应变能 应变幅 热机械疲劳 高温疲劳 |
STRAIN ENERGY DAMAGE MODEL AND ITS APPLICATION TO TOOL STEEL THERMAL FATIGUE |
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| Shi Zhanhua,Tang Jiyue,Li Xizhang,Xiao Zhongyi,Wang Haiqing,Guo Xiufen Huazhong University of Science and Technology Beijing Institute of Aeronautical Materials. STRAIN ENERGY DAMAGE MODEL AND ITS APPLICATION TO TOOL STEEL THERMAL FATIGUE[J]. , 1988, 0(2) |
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| Authors: | Shi Zhanhua Tang Jiyue Li Xizhang Xiao Zhongyi Wang Haiqing Guo Xiufen Huazhong University of Science Technology Beijing Institute of Aeronautical Materials |
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| Affiliation: | Shi Zhanhua;Tang Jiyue;Li Xizhang;Xiao Zhongyi;Wang Haiqing;Guo Xiufen Huazhong University of Science and Technology Beijing Institute of Aeronautical Materials |
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| Abstract: | The strain energy damage model (SEDM), namely, a modification of Man-son-Coffin equation, has been developed to predict the life of thermal fatiguewere done to 5Cr2NiMoVSi (5Cr2 for short) and 5CrNiMo tool steels. It showethat the life can be predicated by two variables: i.e, the thermal fatigue lifesof material is a property determined by strength and plasticity of materials.Using SEDM, the results are in accord with the actual life of dies,on the con-trary, the results are opposite to the actual life of dies while using Manson-Coffin equation predication. |
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| Keywords: | strain energy strain amplitude thermal-mechanical fatigue high temperature fatigue |
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