| 断裂韧性K1C和断裂门槛值 Δ Kth可靠性测定方法 |
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| 引用本文： | 熊峻江,彭俊华,高镇同.断裂韧性K1C和断裂门槛值 Δ Kth可靠性测定方法[J].北京航空航天大学学报,2000,26(6):694-696. |
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| 作者姓名： | 熊峻江 彭俊华 高镇同 |
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| 作者单位： | 北京航空航天大学 飞行器设计与应用力学系 |
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| 基金项目： | 国家自然科学基金资助项目(19672051,19802001) |
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| 摘 要： | 采用定量方程随机化方法,建立了断裂p-JR-Δa曲线方程,断裂p-JR-Δa曲线与钝化线的交点即为试验测定具有可靠度p的J积分临界值(J1C)p值,根据断裂力学测试原理,由试验测定(J1C)p值可转化出断裂韧性(K1C)p值;还建立了断裂门槛ΔKth值的可靠性测定方法,并对试验数据进行了统计分析处理,得到了一些具有重要应用价值的结果和数据.研究发现:断裂门槛值ΔKth服从正态分布.
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| 关 键 词： | 断裂韧性 门槛值 可靠度 |
| 收稿时间： | 1999-07-20 |
Reliability Methods to Determine Fracture Toughness K1C and Fracture Threshold Value ΔKth |
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| XIONG Jun-jiang,PENG Jun-hua,GAO Zhen-tong.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. |
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| Authors: | XIONG Jun-jiang PENG Jun-hua GAO Zhen-tong |
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| Institution: | Beijing University of Aeronautics and Astronautics, Dept. of Flight Vehicle Design and Applied Mechanics |
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| 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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| Keywords: | fracture toughness fracture threshold value reliability |
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