Research of Crack Growth Life for Certain Helicopters Main Blade
-
摘要: 为保证某型直升机延寿后的飞行安全, 对其疲劳危险部位根部接头进行了材料断裂性能试验, 并对试验数据进行分析处理。通过计算, 对比研究了不同裂纹扩展公式下的裂纹扩展寿命。采用考虑因素较全面的, 且具有较高可靠度的全范围Forman公式进行裂纹扩展寿命分析, 得到不同风险率下的裂纹扩展寿命, 并给出了适合的检查周期。Abstract: In order to guarantee the fly safety of certain helicopters main blade after prolonging life, the materials rupture performance test was carried on the fatigue danger parts of the helicopters root tie-in, and then the test data were analyzed and disposed. Through calculation, different crack growth lives among different crack growth formulas were contrasted. Then the crack growth lives were analyzed with the crack growth formula of full range Forman formula with reliabilities, and the inspection periods were given.
-
Keywords:
- Crack growth model /
- Rupture performance test /
- Reliability /
- Crack growth life /
- Inspection period
-
-
[1] 李庆芬, 胡胜海, 朱世范.断裂力学及其工程应用[M].哈尔滨: 哈尔滨工程大学出版社,2005. [2] 某型直升机动部件延寿技术[R].青岛: 中国海军科技报告,2003. [3] 穆志韬, 华 然, 段成美.高周疲劳载荷环境下直升机动部件的损伤容限分析[J].机械强度,2002,24(1): 113-115. [4] 刘文廷.断裂性能测试[M].北京: 北京航空航天大学出版社, 1985. [5] 胡仁伟.直升机动部件损伤容限评定方法研究[D].北京: 北京航空航天大学,1995. [6] 陈瑞峰.裂纹扩展寿命模型的对比研究[J].计算力学学报,1997,14(2): 96-101. [7] 熊峻江,高镇同.广义断裂等寿命曲线与二维门槛值概率分布[J].北京航空航天大学学报,2000,13(2): 206-211. [8] 王永廉, 吴永瑞.一个适用性广泛的疲劳裂纹扩展速率表达式[J].航空学报,1987,8(4): 191-196.
计量
- 文章访问数: 1
- HTML全文浏览量: 0
- PDF下载量: 2