针对工程实际中的管状和空间三维编织复合材料构件中力学性能存在梯度的情况,提出一种性能可以变化的六面体微单元几何模型来描述三维编织复合材料及其构件的几何特性.这种微单元的结构根据三维编织立体几何结构的不同而不同.找出微单元几何形状的变化规律和编织纱线在单元中的位置及体积百分数的变化趋势,为确定这些因素与微单元局部力学性能的关系提供了一种切实可行的分析模型.以轴线为直线的管状三维编织复合材料为例,建立了可变微单元几何模型,详细分析了各个参数之间的变化关系.这里等轴向编织花节矩形断面复合材料分析成为可变微单元分析方法的一种特殊情况,同时这种模型还可用于描述空间复杂形状多维编织复合材料的几何特性描述,有助于这类材料及构件的力学分析.
参考文献
| [1] | Yang J M, Ma C L, Chou T W. Fiber inclination model of three dimensional textile structural composites [J]. J Com pos Mater, 1986, 20(9): 472 483. |
| [2] | Li W, Hammad M, El-Shiekn A. Structural analysis of 3-D braided preforms for composites, part one: The four-step preforms [J]. J Text Inst, 1990, 81(4): 491-514. |
| [3] | Sun H Y, Qiao X. Prediction of the mechanical properties of three-dimensionally braided composites [J]. Composites Science and Technology, 1997, 57(6): 623-629. |
| [4] | Chen L, Tao X M, Choy C L. On the microstructure of three dimensional braided preforms [J]. Composites Science and Technology, 1999, 59(3): 391-404. |
| [5] | Wu D L. Three-cell model and 5D braided structural composites [J]. Composites Science and Technology, 1996, 56(3): 225-233. |
| [6] | Zeng Tao, Wu Linzhi. Post-buckling analysis of stiffened braided cylindrical shells under combined external pressure and axial compression [J]. Composite Structures, 2003, 60(4) :455-466. |
| [7] | Chen L, Tao X M, Choy C L. Mechanical analysis of braided composites by the finite multiphase method [J]. Composites Science and Technology, 1999, 59(16): 2383-2391. |
| [8] | Wang Y Q, Wang A S D. On the topological yarn structure of 3-D rectangular and tubular braided preforms [J]. Composites Science and Technology, 1994, 51(4): 575-586. |
| [9] | Gu Bohong. Prediction of the uniaxial tensile curve of 4-step 3-dimensional braided preform [J]. Composite Structures,2004, 64(2): 235-241. |
| [10] | D' Amato E. Finite element modeling of textile composites[J]. Composite Structures, 2001, 54(4): 467-475. |
| [11] | Bigaud David, Hamelin Patrice. Stiffness and failure modelling of 2D and 3D textile-reinforced composites by means of imbricate-type elements approaches [J]. Computers and Structures, 2002, 80(27-30): 2253-2264. |
| [12] | 黄小平.四向矩形复合材料几何细观结构和力学性能研究[D].南京:南京航空航天大学,2001. |
| [13] | 陈利,李嘉禄,李学明.三维四步法圆形编制结构分析[J].复合材料学报,2003,20(2):76-80. |
| [14] | Wang Y Q, Wang A S D. Spatial distribution of yarns and mechanical properties in 3D braided tubular composites applied [J]. Composite Materials , 1997, 4(2): 121-132. |
| [15] | Mouritz A P, Bannister M K, Falzon P J, et al. Review of applications for advanced three-dimensional fibre textile com posites [J]. Composites Part A, 1999, 30(12): 1445-1461. |
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