提出了基于z-pin桥联力试验的z-pin增强复合材料T型接头层间性能的模拟方法.每根z-pin的作用有两部分:增加了分层的张开阻力与剪切阻力.在有限元模拟中通过在相应的节点上加两个方向(竖直方向和水平方向)的非线性弹簧模拟张开阻力和剪切阻力.通过张开型z-pin桥联力试验和剪切型z-pin桥联力试验得到两条力-位移曲线,再把曲线各自赋予到所有竖直非线性弹簧和水平非线性弹簧,从而模拟z-pin对复合材料T型接头层间性能的增强效果.在T型接头拉拔试验模拟分析中,研究了不同跨距和不同z-pin间距对拉拔力的影响.模拟分析表明跨距对拉脱位移影响较大,z-pin间距对最大拉拔力影响较大.
参考文献
| [1] | Tay T E.Characterization and analysis of delamination fracture in composites-An overview of developments from 1990 to2001[J].Applied Mechanics Reviews,2003,56(1):1-32. |
| [2] | O'Brien T K.Influence of compression and shear on the strength of composite laminates with z-pinned reinforcement,TM-213768[R].Washington:NASA,2005. |
| [3] | Clarke A,Greenhalgh E,Meeks C,Jones C.Enhanced structural damage tolerance of CFRP primary structuresby z-pin reinforcement[C]//44th AIAA/ASME/ASCE/AHS Structures,Structural Dynamics & Materials Conference.Norfolk.Virginia:Palm Springs,2003. |
| [4] | Li R,Huong N,Crosky A,et al.Improving bearing performance of composite bolted joints using z-pins[J].Composites Science and Technology,2009,69:883-889. |
| [5] | Barrett J D.The mechanics of z-fiber reinforcement[J].Composite Structures,1996,36:23-32. |
| [6] | Mouritz A P.Review of z-pinned composite laminates[J].Composites Part A,2007,38:2383-2397. |
| [7] | Freitas G,Magee C,Dardzinskip P,et al.Fiber intertion process for improved damage tolerance in aircraft laminates[J].Journal of Advanced Materials,1994,25:36-43. |
| [8] | 孙先念,刘书田.Z-pin几何分布对其增强复合材料双悬臂梁Ⅰ型层间韧性的影响[J].复合材料学报,2007,24(3):160-166.Sun Xiannian,Liu Shutian.Effect of z-pins distribution on mode Ⅰ delamination toughness of z-pinned laminated double cantilever beam specimens[J].Materiae Compositae Sinica,2007,24(3),160-166. |
| [9] | Cartie D D R,Dell'Anno G,Poulin E,Partridge I K.3D reinforcement of stiffener-to-skin T-joints by z-pinning and tufting[J].Engineering Fracture Mechanics,2006,73:2532-2540. |
| [10] | Ratcliffe J G,O'Brien T K.Discrete spring model for predicting delamination growth in z-fiber reinforced DCB specimens,TM-213019[R].Washington:NASA,2004. |
| [11] | Dantuluri V,Maiti S,Geubelle P H,et al.Cohesive modeling of delamination in z-pin reinforced composite laminates[J].Composites Science and Technology,2007,67:616-631. |
| [12] | Meo M,Achard F,Grassi M.Finite element modelling of bridging micromechanics in through-thickness reinforced composite laminates[J].Composite Structures,2005,71:383-387. |
| [13] | Cartie D D R,Cox B N,Fleck N A.Mechanisms of crack bridging by composite and metallic rods[J].Composites:Part A,2004,35:1325-1336. |
| [14] | Cartie D D R,Troulis M,Partridge I K.Delamination in Zpinned carbon fibre laminates[J].Composites Science and Technology,2006,66:855-861. |
| [15] | Tao Y Q,Jiao G Q,Wang B,Chang Y J.Effect of z-pins'diameter,spacing and overlap length on connecting performance of CMC singlelap joint[J].Acta Mechanica Solida Sinica,2008,21:461-471. |
| [16] | Dai S C,Yan W,Liu H Y,Mai Y W.Experimental study on z-pin bridging law by pullout test[J].Composites Science and Technology,2004,64:2451-2457. |
| [17] | Zhang A Y,Liu H Y,Mouritz A P,Mai Y W.Experiment study and computer simulation on degradation of z-pin reinforcement under cyclic fatigue[J].Composites Part A,2008,39:406-414. |
| [18] | 孙先念,郑长良.层合复合材料z-pinning增强技术的力学进展[J].航空学报,2006,27(6):1194-1202.Sun Xiannian,Zheng Changliang.Advances on modeling through-the-thickness reinforcement of laminated composite by z-pinning[J].Acta Aeronautica et Astronatica Sinica,2006,27(6):1194-1202. |
| [19] | Liu H Y,Yan W Y,Mai Y W.z-pin Bridging force in composite delamination[C]//Blackman B R K,Pavan A,Williams J G.Fracture of Polymers,Composites and Adhesives Ⅱ.Amsterdam:Elsevier,2003:491-502. |
| [20] | Yan W Y,Liu H Y,Mai Y W.Numerical study on the mode Ⅰdelamination toughness of z-pinned laminates[J].Composites Science and Technology,2003,63:1481-1493. |
| [21] | Yan W Y,Liu H Y,Mai Y W.Mode Ⅱ delamination thoughness of z-pinned laminates[J].Composites Science and Technology,2004,64(13/14):1937-1945. |
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