复合材料结构机械连接设计分析与试验研究

以某型机复合材料机身与主减后接头局部连接结构为研究对象,针对结构承面外载荷较大的特殊受载形式进行复合材料-金属接头机械连接技术研究。通过有限元仿真分析,确定了复合材料-金属接头的连接形式,并对复合材料机身结构连接区的局部铺层进行了优化,随后开展复合材料-金属接头连接结构的力学试验。结果表明,在给定载荷下,复合材料-金属接头机械连接结构具有足够的强度和刚度,满足设计要求。

Test Investigation on Mechanically Fastened Joint of Composite Structure

The mechanically fastened joint of composite structure that resists with special force can induce a high load out of plane. A typical c omposite structure is selected from a certain type of helicopter fuselage. An ap propriate joint style is established by finite element analysis, the local lay up of carbon fiber reinforced plastic(CFRP) fuselage is optimized, and then mech anical tests are carried out for the composite metal joint structure. The resul ts show that analysis data agrees well with test results, and the mechanically f astened joint of composite structure has enough strength and satisfies design re quests at given loads.