| 三向编织玻璃/环氧复合材料刚度性能 |
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| 引用本文： | 张平,桂良进,范子杰.三向编织玻璃/环氧复合材料刚度性能[J].复合材料学报,2008,25(2):31-34. |
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| 作者姓名： | 张平 桂良进 范子杰 |
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| 作者单位： | 清华大学汽车工程系汽车安全与节能国家重点实验室,北京,100084 |
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| 基金项目： | 国家自然科学基金(50405003);清华大学基础研究基金(JC2003018) |
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| 摘 要： | 通过实验研究了三向编织玻璃/环氧复合材料的刚度性能 , 并考虑编织角和试件宽度参数的影响 , 探讨了拉伸和压缩刚度性能的差异。实验结果表明 : 在同一纤维体积分数条件下 , 随着编织角的增大 , 试件的纵向弹性模量有所减小 , 泊松比 (在编织角约大于 35° 时) 也有所减小 ; 宽度为两倍和三倍单胞宽度的试件的刚度性能基本相同; 试件的纵向弹性模量和泊松比远大于横向弹性模量和泊松比; 拉伸和压缩时试件的弹性模量和泊松比基本接近 ; 在横向拉伸和压缩时试件的应力2应变曲线具有明显的非线性特征。实验结果为编织复合材料结构设计提供了数据参考。
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| 关 键 词： | 三向编织复合材料 刚度性能 玻璃/环氧 |
| 文章编号： | 1000-3851(2008)02-0031-04 |
| 收稿时间： | 2007-05-22 |
| 修稿时间： | 2007年5月22日 |
Stiffness properties of triaxially braided glass/epoxy composites |
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| ZHANG Ping,GUI Liangjin,FAN Zijie.Stiffness properties of triaxially braided glass/epoxy composites[J].Acta Materiae Compositae Sinica,2008,25(2):31-34. |
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| Authors: | ZHANG Ping GUI Liangjin FAN Zijie |
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| Affiliation: | (State Key Laboratory of Automotive Safety and Energy, Department of Automotive Engineering,Tsinghua University, Beijing 100084, China) |
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| Abstract: | The stiffness properties of t riaxially braided glass/ epoxy composites , considering the effect of braid
angle and specimen width , were tested. The differences between tensile and compressive stiffness properties were also discussed. The test result s show that the longitudinal modulus of the specimens decreases a lit tle with the increasing braid angle in the same fiber volume f raction , and so dose the Poisson ratio (when the braid angle is approximately greater than 35 degree) . As the specimen width changes f rom double to threefold the unit cell width , the stiffness properties of the specimen are almost equal . The longitudinal modulus and Poisson ratio are much greater than the t ransverse modulus and Poisson ratio. Furthermore , tensile specimens almost equal compressive specimens in modulus and Poisson ratio. It is found that the t ransverse tension and compression stress 2strain curves are highly nonlinear. The test result s can provide a reference for the braided composite st ructure design. |
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| Keywords: | t riaxially braided composite stiffness properties glass/ epoxy |
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