三维编织复合材料圆柱销剪切试验与数值模拟

发布时间：2018-06-21 03:32

  本文选题：三维编织复合材料 + 圆柱销　； 参考：《北京航空航天大学学报》2016年02期

【摘要】：复合材料紧固件连接技术是复合材料结构加工制造的关键技术之一,针对三维编织复合材料圆柱销紧固件的剪切性能进行了试验和有限元数值模拟分析。试件采用了三维全五向编织工艺进行制备。通过双剪性能测试得到了三维编织复合材料圆柱销的极限承载能力和破坏断裂形式,采用均匀化方法对圆柱销试件的宏观弹性常数进行了预测,采用改进后的Tsai-Hill准则并引入连续介质损伤力学建立了一套三维编织复合材料强度分析方法,并根据该方法对圆柱销试件在剪切载荷作用下的渐进失效破坏过程进行了有限元分析,计算结果与试验结果具有良好的一致性,表明提出的强度分析方法在预测三维编织复合材料结构件的宏观强度性能方面是有效可行的。
[Abstract]:The bonding technology of composite fasteners is one of the key technologies in the fabrication of composite structures. The shear behavior of three-dimensional braided composite cylindrical pins fasteners is tested and analyzed by finite element numerical simulation. Three-dimensional five-dimensional braiding process was used to prepare the specimens. The ultimate bearing capacity and failure fracture form of 3-D braided composite cylindrical pin were obtained by double shear test. The macroscopic elastic constants of cylindrical pin specimens were predicted by homogenization method. Using the improved Tsai-Hill criterion and introducing the damage mechanics of continuous medium, a set of strength analysis method for 3D braided composites is established. According to this method, the progressive failure process of cylindrical pin specimen under shear load is analyzed by finite element method. The calculated results are in good agreement with the experimental results. The results show that the proposed strength analysis method is effective and feasible in predicting the macroscopic strength properties of 3D braided composite structures.
【作者单位】： 北京航空航天大学航空科学与工程学院;
【分类号】：V214.8
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本文编号：2047013