| 热疲劳裂纹扩展的数值模拟 |
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| 引用本文： | 于辉,杜凤山,李亮. 热疲劳裂纹扩展的数值模拟[J]. 重型机械, 2004, 0(5): 50-52 |
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| 作者姓名： | 于辉 杜凤山 李亮 |
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| 作者单位： | 1. 燕山大学,河北,秦皇岛,066004
2. 清华大学汽车系,北京,100084 |
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| 摘 要： | 本文根据热疲劳损伤力学和有限元技术,研究了复杂温度环境下的热疲劳损伤现象,建立了复杂热力学边界条件下的热应力分析模型,研究了多变量耦合作用下的温度场、热应力场等的分布规律及高温交变热冲击条件热疲劳裂纹的扩展特性,并进行了实验验证,对于类似条件下工作设备的热损伤问题具有重要指导意义.
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| 关 键 词： | 裂纹萌生 裂纹扩展 有限元技术 温度场 |
| 文章编号： | 1001-196X(2004)05-0050-03 |
| 修稿时间： | 2004-07-15 |
Numerical simulation on the crack propagation of thermal fatigue |
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| YU Hui,DU Feng-shan,LI Liang. Numerical simulation on the crack propagation of thermal fatigue[J]. Heavy Machinery, 2004, 0(5): 50-52 |
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| Authors: | YU Hui DU Feng-shan LI Liang |
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| Affiliation: | YU Hui~1,DU Feng-shan~1,LI Liang~2 |
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| Abstract: | In this paper,the thermal fatigue damage phenomenon in the comprehensive temperature environment is studied by means of thermal fatigue damage mechanics and FEM technology.The thermal-stress analysis model under the comprehensive thermodynamic boundary conditions is established.The regularities of distribution of temperature fields,thermal stress fields effected by the comprehensive coupled variables are investigated,the characteristics of thermal fatigue crack propagation under the high-temperature alternating thermal impact conditions is developed.Which was verified by the experiments,and is very significant to study thermal damage question of working equipments in the similar conditions. |
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| Keywords: | crack initiation crack propagation FEM technology temperature field |
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