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Volume 26 Issue 6
Jun.  2000
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Journal of Beijing University of Aeronautics and Astronautics  > 2000  >  26(6): 694-696.
Qi Bojin, Xu Haiying, Huang Songtao, et al. Ultrasonic frequency pulse tungsten inert gas welding power source topology and welding applicability[J]. Journal of Beijing University of Aeronautics and Astronautics, 2009, 35(1): 61-64. (in Chinese)
Citation: XIONG Jun-jiang, PENG Jun-hua, GAO Zhen-tonget al. Reliability Methods to Determine Fracture Toughness K1C and Fracture Threshold Value ΔKth[J]. Journal of Beijing University of Aeronautics and Astronautics, 2000, 26(6): 694-696. (in Chinese)
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Reliability Methods to Determine Fracture Toughness K1C and Fracture Threshold Value ΔKth

  • Beijing University of Aeronautics and Astronautics, Dept. of Flight Vehicle Design and Applied Mechanics

  • Received Date: 20 Jul 1999
  • Publish Date: 30 Jun 2000
    Abstract
  • According to the randomization method of deterministic equation,fracture p-JR-Δa curve equation is established.From this fracture p-JR-Δa curve and fracture passivation curve,fracture critical value (J1C) p with the reliability level of p may be obtained.By means of fracture testing principle,fracture (K1C)p can be derived from (J1C)p.Then the reliability method to determine fracture threshold value ΔKth is presented.After the treatment of test data,some important results are obtained.From the statistical test,it is validated that fracture threshold value ΔKth follows the normal distribution.

     

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  • [1] Xiong Junjiang,Wu Zhe,Gao Zhentong.The randomization method of deterministic equation for probability fracture mechanics[J].Chinese Journal of Aeronautics,1999,12(3):148~153. [2]熊峻江,刘文,高镇同.疲劳裂纹扩展速率试验数据的可靠性分析模型[J].强度与环境,1997,(4):6~10. [3]崔振源.断裂韧性测试原理和方法[M].上海:上海科学技术出版社,1981. [4]《机械工程材料性能数据手册》编委会.机械工程材料性能数据手册[M].北京:机械工业出版社,1994. [5]邓增杰,周敬恩.工程材料的断裂与疲劳[M].北京:机械工业出版社,1995. [6]高镇同,蒋新桐,熊峻江,等.疲劳性能试验设计与数据处理[M].北京:北京航空航天大学出版社,1999.
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