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汽车单体轻质材料性能分析及项目研究


类型:案例|4500字, 类别:原创|RMB445, 附件:开题报告|文献综述

【摘要】

汽车单体轻质材料性能分析及项目研究该项目即为利物浦约翰摩尔大学赛车队研究单体底盘的轻质材料是成功的。 对各种类型的单体材料进行了大量的研究。讨论和评价了竞争材料如碳纤维和聚合物复合材料的性能。然后讨论了单晶硅的制造工艺。 制备了三种类型的样品填料,以研究柱状结构的电位。一种是仅用树脂涂覆的纤维网。第二次预涂纳米复合材料,然后涂上树脂。第三个样品仅用树脂涂覆,但在固化过程中,纤维将被拉伸。 利用压缩试验机进行试验后,记录载荷-位移数据,利用试验机软件自动绘制曲线。此外,从荷载-位移数据计算应力-应变曲线。然后分别测定样品1, 2和3的杨氏模量,分别为2.95MPa、44.85 MPa和3.15MPa。 结果表明,拉伸纤维具有较高的柱状强度。然而,在曲线图的曲线上,该结构是一个脆性的荷载。样品2(预涂覆纳米复合材料的纤维)将克服这一缺点,具有更高的E值。因此,可以假定拉伸和预涂覆纳米复合材料的纤维可能是最硬的。 此外,纤维结构特性的MATLAB模型被产生来估计改变纤维角度的效果。模型运行后,发现随着θ的减小,弹性模量值变大,说明纤维填料的强度变强。证明了柱状结构比在角点处连接浅角梁的结构更硬。 综上所述,轻质材料的性能已经研究得很好,并且已经设计出改善配方学生车性能的轻质材料。这是一个成功的项目。
In terms of achieving the objectives, this project namely investigating lightweight material for the monocoque chassis for the Liverpool John Moores University Racing Team was successful.
A vast amount of research was conducted on various types of monocoque materials. Performance of competing materials such as Carbon Fibre and polymer composite was discussed and evaluated. Then the manufacturing process for monocoque was discussed.
Three types of sample filler were produced to investigate the potential of a more columnar structure. One was a fiberous mesh coated with resin-only. The second was pre-coated with a nanocomposite, and then coated with resin. The third sample was coated with resin-only, but during the curing process the fibres will be stretched.
After being tested by using the compression testing machine, the Load-Displacement data was recorded and the curve was plotted automatically by the testing machine software. Also the Stress-Strain curve was calculated from the Load-Displacement data. Then the Young’s Modulus of cell structure in Sample 1, 2 and 3 were got respectively that were 2.95MPa, 44.85MPa and 3.15MPa.
According to the result, the stretched fibres are more columnar with a higher strength. However, the structure was brittle as reversals of load in the curve of graph line. Sample 2 (fibres pre-coated with nanocomposite) would overcome this shortcoming with a much higher E value. As a result, an assumption can be made that the fibres both stretched and pre-coated with nanocomposite would probably be the stiffest.
Also a MatLab model of fibre structural properties was produced to estimate the effect of changing the fibre angle. After running the model, it was found that with the decreasing of θ, the value of modulus of elasticity became bigger which means the fibrous filler getting stronger. It proved that a columnar structure would be stiffer than a structure which is shallow angle beam joining at a vertex.
To conclude, the properties of a lightweight material has been studied well and the lightweight material that improves the performance of a Formula Student Car has been designed. This is a successful project.

 

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