Effect of Submicron Glass Fiber Modification on Mechanical Properties of Short Carbon Fiber Reinforced Polymer Composite with Different Fiber Length
Effect of Submicron Glass Fiber Modification on Mechanical Properties of Short Carbon Fiber Reinforced Polymer Composite with Different Fiber Length
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DOI：
10.3390/jcs4010005
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发表时间：
2020-01
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影响因子：
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通讯作者：
N. Nguyen;O. Kiyotaka;Okubo Kazuya;F. Toru;Shibata Ou;Tomokuni Hidehiko;Fujita Yukiko
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文献类型：
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作者：
N. Nguyen;O. Kiyotaka;Okubo Kazuya;F. Toru;Shibata Ou;Tomokuni Hidehiko;Fujita Yukiko
在这项研究中，制备了三种长度为1、3和25毫米的碳纤维（CF）用于加工复合材料。通过静态测试（即弯曲、拉伸和冲击）以及拉伸疲劳测试，研究并比较了添加亚微米玻璃纤维 (sGF) 对不同 CF 长度的复合材料机械性能的影响。复合材料的强度随着CF长度的增加而增加。然而，当纤维长度从1毫米变为3毫米时，有显着的改善。当体积分数相同时，3 和 25 mm 的机械性能几乎相同，但抗冲击性除外。比较不同 sGF 含量时的静态强度，证实当 sGF 添加到 1 mm 复合材料中时，由于基体增韧，弯曲强度有所提高。然而，当使用较长纤维且纤维浓度较高时，复合材料的力学性能几乎取决于CF。因此，由于添加sGF而对基质的改性作用消失了。与静态强度相比，复合材料的疲劳耐久性与基体中玻璃纤维的含量成比例增加，与 CF 长度无关。
In this research, three kinds of carbon fiber (CF) with lengths of 1, 3, and 25 mm were prepared for processing composite. The effect of submicron glass fiber addition (sGF) on mechanical properties of composites with different CF lengths was investigated and compared throughout static tests (i.e., bending, tensile, and impact), as well as the tension-tension fatigue test. The strengths of composites increased with the increase of CF length. However, there was a significant improvement when the fiber length changed from 1 to 3 mm. The mechanical performance of 3 and 25 mm was almost the same when having an equal volume fraction, except for the impact resistance. Comparing the static strengths when varying the sGF content, an improvement of bending strength was confirmed when sGF was added into 1 mm composite due to toughened matrix. However, when longer fiber was used and fiber concentration was high, mechanical properties of composite were almost dependent on the CF. Therefore, the modification effect of matrix due to sGF addition disappeared. In contrast to the static strengths, the fatigue durability of composites increased proportionally to the content of glass fiber in the matrix, regardless to CF length.