摘要
针对高温下传统高温合金螺栓连接复合材料结构时的热膨胀不适配问题,研究与设计一种热适配新型结构分体式金属螺栓,具备较好的高温防松效果。推导了高温剩余轴力与多种参数之间的理论公式,分析配合界面位置对高温防松效果的影响;建立有限元模型,模拟螺栓温升时的轴力变化情况;进行热适配螺栓与普通螺栓常/高温静力拉伸对比试验,结果表明该种热适配螺栓有较好的高温防松效果,印证配合界面位置对高温防松效果的影响方式。
Aiming at the mismatch of thermal expansion when ordinary superalloy bolt connects composite material structure, a new metal bolt with split structure for thermal adaption which has good anti-loosening effect at high temperature is researched and designed. The theoretical formula between residual axial force at high temperature and various parameters is derived. The influence of coordination interface position on anti-loosening effect at high temperature is analysed. The finite element model is established to simulate the axial force variation when the temperature rises. A static contrast test between thermal adaptive bolt and ordinary bolt at normal/high temperature is carried out. The results show that the thermal adaptive bolt has good anti-loosening effect at high temperature and confirm the conclusion about the influence of the coordination interface position on anti-loosening effect at high temperature.
作者
张中原
谭志勇
占续军
何顶顶
董威利
ZHANG Zhong-yuan;TAN Zhi-yong;ZHAN Xu-jun;HE Ding-ding;DONG Wei-li(Key Laboratory of Space Physics,Beijing 100076,China;Aerospace Mechanical Dynamics Research Institute,Southeast University,Nanjing,211189)
出处
《强度与环境》
CSCD
2019年第1期35-41,共7页
Structure & Environment Engineering
基金
国防重点实验室基金项目(61422110205)
关键词
复合材料
高温合金螺栓
热适配
分体式结构
高温防松
配合界面位置
composite material
superalloy bolt
thermal adaption
split structure
anti-loosening at high temperature
coordination interface position
