摘要
为了验证镁合金的螺纹孔强度,文中以某型号设备减重需求为背景,采用螺钉预紧力理论分析和基于商业分析软件Workbench的仿真方法研究了不锈钢螺钉与2种基材的螺钉连接在给定预紧力下的受力情况。分析结果显示,采用不锈钢螺钉的推荐预紧力下限值能够保证螺钉和镁合金基材最大等效应力低于材料屈服强度。通过随机振动试验验证采用镁合金原位替换硬铝合金应用于电子设备主承力结构的可行性。研究结果为轻质和低强度材料在航空航天电子设备上的应用提供了参考。
Based on the lightweight requirement of some aerospace project, this paper describes the mechan- ical behavior of the stainless steel bolt and alloy matrix under applied bolt pretension force. The theoretical analysis of bolt pretension force and numerical methods based on commercial FE analysis package （ Work- bench, version 15. O） have been used to verify the bolted joint strength. The analysis result shows that the maximum equivalent stresses for both bolt and MB8 magnesium alloy are lower than their material yielding strength, while the recommended lower limit of bolt pretension force is carried on the model. Finally, the feasibility has been demonstrated through the random vibration test results, wtlich means the MB8 magnesi- um alloy can be used in electronic equipment supporting structure instead of LY12-CZ aluminum alloy. The presented analysis provides meaningful guidance of lightweight and low-strength materials in aerospace appli- eatlons.
作者
陈波
陈以金
张登材
CHEN Bo CHEN Yi-jin ZHANG Deng-cai(The 29th Research Institute of CETC, Chengdtl 610036, China)
出处
《电子机械工程》
2017年第3期40-43,共4页
Electro-Mechanical Engineering
关键词
航天
电子设备
减重
镁合金
预紧力
aerospace
electronic equipment
lightweight
MB8 magnesium alloy
bolt pretension force
