| 436 | 13 | 6 |
| 下载次数 | 被引频次 | 阅读次数 |
为评价不同混杂结构复合材料冲击阻抗的混杂效应,通过引入芳纶纤维增强体制备了层间混杂(IE)、夹芯混杂(SA)、非对称混杂(US)和层内混杂(IA)的碳-芳纶二维编织复合材料,并通过落锤冲击实验研究了混杂结构对其冲击载荷、冲击吸收能量、损伤形貌等性能的影响.实验结果表明:层内混杂(IA)试样具有最高的峰值载荷(4.28 k N),比非混杂结构层板高37.2%;其他混杂结构试样中,峰值载荷均低于非混杂结构层板,层板IE的韧性指数DI值比层板SA的高31.5%,说明层间混杂结构表现出比夹芯混杂结构优良的冲击韧性;但IA的弹性应变能(5.964 J)最大,其他试样弹性应变能(几乎为0)远小于试样IA,表明试样IA在冲击过程中产生了较大的弹性变形,表现出优良的韧性性能.通过超声扫描成像系统观察并评价层板内部冲击损伤及失效机理可知:碳纤维层板产生了较严重的内部损伤,试样SA和试样US侧面产生了分层现象;试样IE的C扫描图像显示试样产生了程度较轻的内部损伤,但和试样IA相比,其蓝色区域分布范围较大;IA试样冲击内部损伤面积较小,说明碳纤维和芳纶纤维相互交织排列的层内混杂结构,表现出较强的塑性变形能力和良好的抗冲击性能.
Abstract：Four different types of carbon-aramid hybrid 2 D braided composites were produced and tested, such as interply hybrid(IE), sandwich-like hybrid(SA), unsymmetric hybrid(US) and intraply hybrid(IA), to evaluate the hybridization effects of impact resistence of carbon/epoxy composites by introducing aramid fiber reinforcements.The effects of the hybrid structure on the impact properties such as the Pm(peak load), the ductility index(DI)and internal damage were discussed. It is concluded that the Pm of intraply hybrid are the highest(4.28 k N),which is 37.2% higher than those of hybrid structure. Among other hybrid structure specimens, the peak load is lower than those of hybrid structure. The DI value of IE is 31.5% higher than that of SA, indicating that the interply hybrid shows better impact-toughness than the sandwich-like hybrid. However, the elastic strain energy of IA(5.964 J) is the largest and other specimens is much smaller than that of IA(almost 0). It is shown that IA shows larger elastic deformation and excellent ductile properties than others. The internal damage and failure mechanisms were analyzed from the C-scan imaging. The carbon fiber specimens produce severe internal damage. There are severe delamination cracks on the sides of sandwich-like hybrid specimens and unsymmetric hybrid specimens. The C-scan imaging of the interply hybrid shows that there are weaker internal damage, but the blue region is larger than that of intraply hybrid. The internal damage area of intraply hybrid is smaller. It is concluded that the intraply hybrid shows strong plastic deformation ability and good impact resistance.
[1]LITTEL L,JUSTIN D.Experimental and analytical characterization of the macromechanical response for triaxial braided composite materials[R].Houston:NASA/CR,2013.
[2]CAGRI A,JASON C.2D braided composites:A review for stiffness critical applications[J].Composite Structures,2008,85(1):43-58.
[3]REIS P N B,FERREIRA J A M,SANTOS P,et al.Impact response of Kevlar composites with filled epoxy matrix[J].Composite Structures,2012,94(12):3520-3528.
[4]SHU C Q,WASS A M,SHAHWAN K W,et al.Compressive response and failure of braided textile composites:Part1-experiments[J].International Journal of Non-Linear Mechanics,2004,39(4):635-648.
[5]IVANOV D,BANDURY F,BROUCKE B,et al.Failure analysis of triaxial braided composite[J].Composites Science and Technology,2009,69(9):1372-1380.
[6]BOHM R,HORNING A,LUFT J,et al.Experimental investigation of the strain rate dependent behaviour of 2D biaxially and triaxially reinforced braided composites[J].Applied Composite Materials,2014,21(2):285-299.
[7]马小菲,张国利,朱有欣,等.2D编织混杂复合材料圆管压缩和弯曲性能研究[J].天津工业大学学报,2014,33(3):17-23.MA X F,ZHANG G L,ZHU Y X,et al.Study on compression and bending properties of 2D braided hybrid composite tubes[J].Journal of Tianjin Polytechnic University,2014,33(3):17-23(in Chinese).
[8]朱露露.二维三轴编织铺层复合材料开孔前后的弯曲和剪切性能研究[D].上海:东华大学,2015.ZHU L L.Bending properties of 2-D triaxial braded laminated composites with and without open-holes[D].Shanghai:Donghua University,2015(in Chinese).
[9]严文聪,曾金芳,王斌.纤维混杂复合材料研究进展[J].化工新型材料,2011,39(6):30-33.YAN W C,CENG J F,WANG B.Research progress in fiber hybrid composites[J].New Chemical Materials,2011,39(6):30-33(in Chinese).
[10]CHIU C H,TSAI K H.Crush-failure modes of 2D triaxially braided hybrid composite tubes[J].Composites Science and Technology,1999,59(11):1713-1723.
[11]GUSTIN J M.Low velocity impact of combination Kevlar/carbon fiber sandwich composites[J].Composite Structures,2005,69(4):396-406.
[12]WAN Y Z,CHEN G C,HUANG Y.Characterization of three dimensional braided carbon/kevlar hybrid composites for orthopedic usage[J].Materials Science and Engineering,2005,398(1):227-232.
[13]王文莎,阎建华,顾海麟.混杂编织层合复合材料低速冲击性能研究[J].玻璃钢/复合材料,2015(5):47-53.WANG W S,YAN J H,GU H L.Study on low velocity impact performance of hybrid braided laminated composites[J].Fiber Reinforced Plastic/Composites,2015(5):47-53(in Chinese).
[14]ASTM International.ASTM D7136/D7137-07 Standard test method for measuring the damage resistance of a fiber-reinforced polymer matrix composite to a drop-weight impact event[S].West Conshohocken:ASTM International,2012.
[15]DEHKORDI M T,NOSRATY H,SHOKRIEH M,et al.Low velocity impact properties of intra-ply hybrid composites based on basalt and nylon woven fabrics[J].Materials and Design,2010,31(8):3835-3844.
[16]EVCI C,GULGEC M.An experimental investigation on the impact response of composite materials[J].International Journal of Impact Engineering,2012,43:40-51.
[17]BELINGARD G,VADORI R.Low velocity impact tests of laminate glass-fiber-epoxy matrix composite material plates[J].International Journal of Impact Engineering,2002,27:213-229.
[18]SCHOEPPNER G A,ABRATE S.Delamination threshold loads for low velocity impact on composite laminates[J].Composite Part A,2003,31:903-915.
[19]SARASINI F,TIRILLO J,VALENTEM,et al.Hybrid composites based on aramid and basalt woven fabrics:Impact damage modes and residual flexural properties[J].Materials and Design,2013,49:290-302.
基本信息:
DOI：
中图分类号:TB332
引用信息:
[1]孙颖,田书全,唐梦云等.碳-芳纶二维编织复合材料层板的抗低速冲击性能[J].天津工业大学学报,2018,37(03):1-6.
基金信息:
国家自然科学基金资助项目(11102133);; 天津市科技支撑计划重点项目(15ZCZDGX00340)