| B级钢侧架圆角细节耐久性力学模型研究 |
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| 引用本文： | 刘志明,徐倩,缪龙秀. B级钢侧架圆角细节耐久性力学模型研究[J]. 中国安全科学学报, 2003, 13(1): 75-77 |
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| 作者姓名： | 刘志明 徐倩 缪龙秀 |
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| 作者单位： | 1. 北方交通大学机械与电子控制工程学院
2. 中国铁道科学研究院机车车辆研究所 |
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| 摘 要： | 根据Paris公式推导出适用于B级钢圆角细节耐久性分析的 ,在一定裂纹尺寸范围内的裂纹扩展速率公式及其检验方法 ,笔者模拟货车B级钢转 8A侧架的导框弯角内侧 (A区 )的圆角细部进行耐久性实验 ;以试验数据的检验证明 ,在 0 .4～ 4mm的尺寸范围内 ,选用的断裂力学模型是合理的 ;同时为建立合理的检修周期和寿命体系提供理论模型和安全评价基础。
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| 关 键 词： | 裂纹扩展速率 裂纹尺寸范围 耐久性 圆角细节 B级钢 |
| 修稿时间： | 2002-04-01 |
Study on Mechanical Model for Durability of Round Angle Detail of Cast Steel Grade B Bogie |
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| Liu Zhiming ,Assoc. Prof. Xu Qian Miao Longxiu. Study on Mechanical Model for Durability of Round Angle Detail of Cast Steel Grade B Bogie[J]. China Safety Science Journal, 2003, 13(1): 75-77 |
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| Authors: | Liu Zhiming Assoc. Prof. Xu Qian Miao Longxiu |
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| Affiliation: | Liu Zhiming 1,Assoc. Prof. Xu Qian 2 Miao Longxiu 1 |
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| Abstract: | Based on Paris formula, an equation for the growth rate of crack and the test method for durability are derived, which are feasible for the crack within a definite size range. A freight train is simulated as an example. The durability test is conducted for Grade B cast steel of the round angle detail at the inner side (A region) of the turning angle of the guiding frame. The experiment data verify that the model is rational within the crack size range of 0.4mm～4mm. This theoretical model provides criteria for establishing an appropriate overhaul period and the life span system, and the basis for safety assessment. |
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| Keywords: | Crack growth rate Crack size range Durability Round angle detail Grade B cast steel |
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