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3钉带衬套复合材料/金属接头拉伸疲劳性能 被引量:4
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作者 安子乾 舒茂盛 +2 位作者 程羽佳 郭鑫 程小全 《材料工程》 EI CAS CSCD 北大核心 2021年第12期164-174,共11页
带衬套沉头螺栓连接已经在复合材料连接结构中得到了一定应用,需要对其疲劳性能进行研究。本工作在单搭接3钉带衬套碳纤维复合材料/钛合金沉头螺栓连接接头实验研究基础上,建立复合材料及金属结构的疲劳分析模型,对结构的疲劳性能进行... 带衬套沉头螺栓连接已经在复合材料连接结构中得到了一定应用,需要对其疲劳性能进行研究。本工作在单搭接3钉带衬套碳纤维复合材料/钛合金沉头螺栓连接接头实验研究基础上,建立复合材料及金属结构的疲劳分析模型,对结构的疲劳性能进行有限元分析,并与无衬套接头模型进行对比,研究衬套对接头疲劳性能的影响。结果表明,使用衬套比仅采用螺杆过盈装配能够更加有效地提升接头的疲劳寿命,其中层合板寿命提高了约3.6倍,钛合金板寿命提高了约2.7倍,螺栓寿命提升了约14倍,并且仅出现钛合金板破坏,紧固件不破坏。结合实验结果分析发现,由于复合材料和金属材料自身疲劳性能的差异,其机械连接结构的疲劳破坏模式会因载荷水平的不同而发生变化;当载荷水平较低时,金属结构更容易发生破坏。 展开更多
关键词 复合材料/金属接头 螺栓连接 含衬套沉头螺栓 拉伸疲劳 渐进损伤模型
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Role of friction stir welding parameters on tensile strength of AA6061-B_4C composite joints 被引量:5
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作者 K.KALAISELVAN N.MURUGAN 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第3期616-624,共9页
Friction stir welding(FSW) is a solid state joining technique developed to join high strength aluminum alloys and various ceramic reinforced metal matrix composites(MMCs).FSW produces sound welds in MMCs without a... Friction stir welding(FSW) is a solid state joining technique developed to join high strength aluminum alloys and various ceramic reinforced metal matrix composites(MMCs).FSW produces sound welds in MMCs without any deleterious reaction between reinforcement and matrix.The present work focused on the effect of FSW parameters on the tensile strength of Al-B4C composite joints.The central composite design of four factors and five levels was used to control the number of experiments.A mathematical model was developed to analyze the influence of FSW parameters.The results indicated that the joint fabricated using rotational speed of 1000 r/min,welding speed of 1.3 mm/s,axial force of 10 kN and the reinforcement of 12% showed larger tensile strength compared with the other joints.The developed model was optimized to maximize the tensile strength using generalized reduced gradient method.The metallographic analysis of the joints showed the presence of various zones such as weld nugget(WN) zone,thermo mechanically affected zone(TMAZ) and heat affected zone(HAZ).The substantial grain refinement of aluminum matrix as well as significant size reduction of B4C particles was observed in the weld nugget.TMAZ was plastically deformed,thermally affected and exhibited elongated aluminum grains. 展开更多
关键词 friction stir welding metal matrix composites boron carbide JOINT mechanical properties
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