摘要
为了改进和完善现有设计方法,引入Neuber准则,综合考虑耳片结构弹性模量、拉伸屈服强度、极限强度与塑性应变等参数,采用有限元方法获得耳片应力集中系数,对轴向受载耳片拉伸效率系数计算方法进行修正。相比于传统计算方法,修正之后的计算结果精度提高14.2%,可以进一步降低结构设计重量,且该计算方法适用于所有飞机金属结构材料。
In order to improve and perfect the existing design methods, introduce the Neuber rule, the calculation method of the tension efficiency factor for axially loaded lugs was corrected by taking into account the material characteristics such as the elastic modulus, tension yield strength, ultimate strength and plastic strain, and involved the stress concentration coefficient which is calculated by the finite element analysis method. Compared with the traditional calculation method, the accuracy of the modified calculation was improved by 14.2% .The Neuber corrected method can provide more curate results to help to optimize the design of the axially loaded lug, and can be applied to all metal materials of aircraft.
作者
熊俊
魏峰
曾锐
Xiong Jun, Wei Feng, Zeng Rui(CETCD Wuhu Diamond Aircraft Manufacture CO., LTD., Wuhu 241000, Chin)
出处
《航空科学技术》
2018年第3期25-29,共5页
Aeronautical Science & Technology
关键词
耳片
拉伸效率系数
Neuber修正
应力集中系数
有限元分析
lug
tension efficiency factor
Neuber correction
stress concentration factor
finite element analysis
