摘要
对几种不同仿生螺旋结构竹纤维束的纵向拉伸性能进行测试分析,结果表明:平行均布、单螺旋、双螺旋A、双螺旋B型竹纤维束的拉伸强度分别为11.5、51.7、52.2和56.1 MPa;螺旋结构能够消除纤维束中的强度薄弱点,改善纤维束中各根纤维的结合,同时纤维束各层螺旋角的逐渐变化也有利于拉伸强度的提高。单螺旋、双螺旋A、双螺旋B型竹纤维束的拉伸弹性模量分别为9 659、5 265和4 291 MPa,单螺旋竹纤维束的拉伸弹性模量优于双螺旋竹纤维束。宏观仿生螺旋结构提高了竹束的拉伸强度,却降低了弹性模量。
Axial mechanical properties of bamboo fiber bundles with bionic spiral structures were tested in this study. The results showed that the tensile strengths of fiber bundles with non-twisted and uniform structure and those with single-spiral, double-helix A and double-helix B structures were 11.5,51.7,52. 2 and 56. 1 MPa, respectively. The spiral structure eliminates the weak points of the fiber bundle and improves the inter-fiber linkage. Meanwhile, the gradual change of the helical angle in different fiber layers can also improve the tensile strength. The tensile elastic modulus of samples with single-spiral, double-helix A and double-helix B structure were 9 659, 5 265 and 4 291 MPa,respectively, meaning better performance of single-spiral structure over double-helix one. Self-bionic spiral structure increases the tensile strength but lowered tensile elastic modulus of bamboo fiber bundles.
出处
《林业科技开发》
北大核心
2012年第5期31-34,共4页
China Forestry Science and Technology
基金
江苏省国际科技合作项目"木质复合材料形变专家系统的合作开发"(编号:BZ2007074)
江苏高校优势学科建设工程资助项目
关键词
仿生螺旋
竹纤维束
拉伸强度
拉伸弹性模量
bionic spiral
bamboo fiber bundle
tensile strength
tensile elastic modulus
