通过Voxel有限元网格对球形夹杂复合材料进行应力分析时,由于Voxel网格在两相界面呈现阶梯状,所以在两相界面附近的单元会表现出明显的应力集中现象.提出采用局部应力平均方法来处理由于Voxel有限元网格而引起的应力集中,并且考虑应力平均区域、应力平均加权函数以及网格密度的影响.结果表明:该局部应力平均方法能够有效地去除两相界面附近单元的应力集中,但应力平均区域不能过大也不能过小.通过计算发现采用2个Voxel网格深度的平均区域为最优,并且具有网格不依赖性.该方法也可以进一步用于球形夹杂复合材料的积累损伤演化分析.
参考文献
| [1] | Fang, G.;Liang, J..A review of numerical modeling of three-dimensional braided textile composites[J].Journal of Composite Materials,201123(23):2415-2436. |
| [2] | McGlockton MA.;Cox BN.;McMeeking RM..A Binary Model of textile composites: III high failure strain and work of fracture in 3D weaves[J].Journal of the Mechanics and Physics of Solids,20038(8):1573-1600. |
| [3] | Endel V. Iarve;David H. Mollenhauer;Eric G. Zhou.Independent mesh method-based prediction of local and volume average fields in textile composites[J].Composites, Part A. Applied science and manufacturing,200912(12):1880-1890. |
| [4] | Teb Belytschko;Chandu Parimi;Nicolas Moes;N. Sukumar;Shuji Usui.Structured extended finite element methods for solids defined by implicit surfaces[J].International Journal for Numerical Methods in Engineering,20034(4):609-635. |
| [5] | N. Moees;M. Cloirec;P. Cartraud;J.-F. Remacle.A computational approach to handle complex microstructure geometries[J].Computer Methods in Applied Mechanics and Engineering,200328/30(28/30):3163-3177. |
| [6] | Gao, Xiguang;Luo, Piaoyang;Yu, Guoqiang;Fang, Guangwu;Song, Yingdong.Micro-XCT-based finite element method for prediction of elastic modulus of plane woven carbon fiber-reinforced ceramic matrix composites[J].Journal of Composite Materials,201527(27):3373-3385. |
| [7] | N.V. De Carvalho;S.T. Pinho;P. Robinson.Reducing the domain in the mechanical analysis of periodic structures, with application to woven composites[J].Composites science and technology,20117(7):969-979. |
| [8] | A. S. KOUMPIAS;K. I. TSERPES;S. PANTELAKIS.Progressive damage modelling of 3D fully interlaced woven composite materials[J].Fatigue & Fracture of Engineering Materials and Structures,20147(7):696-706. |
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