| 金属高温疲劳强度的损伤力学评价 |
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| 引用本文： | 郭成璧,何雪宏.金属高温疲劳强度的损伤力学评价[J].大连理工大学学报,1990,30(4):455-463. |
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| 作者姓名： | 郭成璧 何雪宏 |
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| 作者单位： | 大连理工大学动力工程系
(郭成璧，何雪宏)，大连理工大学动力工程系(周玮生) |
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| 摘 要： | 通过高温疲劳损伤分析，提出了塑性损伤和蠕变损伤定义；建立了不同类型热疲 劳和高温低周疲劳损伤量Ｄ的确定方法和损伤发展方程；对蠕变疲劳交互作用下的 损伤迭加进行简化；提出用损伤力学方法评价金属高温疲劳寿命公式，以铸铁材料进 行试验和解析结果表明，所建立的评价寿命公式是正确的。
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| 关 键 词： | 金属疲劳 高温 损伤因子 损伤力学 |
Estimation of Damage Mechanics on Advanced Temperature Fatigue Strength of Metallic Materials |
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| Guo Chengbi,He Xuehong,Zhou Weisheng.Estimation of Damage Mechanics on Advanced Temperature Fatigue Strength of Metallic Materials[J].Journal of Dalian University of Technology,1990,30(4):455-463. |
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| Authors: | Guo Chengbi He Xuehong Zhou Weisheng |
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| Abstract: | In this paper, by damage analysis on thermal fatigue and advanced temper- ature conditions, new definitions of plastic damage and creep damage are presented. The methods to calculate damage variable D and damage doveloping formulas under various kinds of thermal fatigue and advanced temperature low-cycle fatigue are established. The damage accumulation method under creep-fatigue reaction is simplified. And, prediction of advanced temperature fatigue life using damage mechanics is proposed. Cast iron, as an example, has been experimented and analysed. |
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| Keywords: | advanced temperature fatigue damage variable damage developing formula |
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