CAJ | 학술논문

为了提高竞技用自行车的制动性能，先将环氧树脂(EP)和碳化硅混合制备了改性树脂，利用浸渍-模压法制备了一种用于自行车轮圈刹车部位的EP/SiC/碳纤维(CF)复合材料摩擦层样品，利用自制的热导率测试装置研究了导热填料的含量对摩擦层样品的热性能影响，并且对摩擦层样品的厚度规格参数进行了优化。结果表明，摩擦层样品随着时间的增加，表面温度逐渐升高达到平衡；随着改性树脂中导热填料的含量增加，摩擦层样品平衡温度升高，且升温速率下降加快；摩擦层样品的高温热导率随着填料含量的增加而增大，不同厚度摩擦层样品的定值升温时间/厚度的比值不同。综合考虑，改性树脂中导热填料质量分数为6%、厚度为0.5 mm的复合材料摩擦层适用于复合材料自行车轮圈的刹车结构。
위료제고경기용자행차적제동성능，선장배양수지(EP)화탄화규혼합제비료개성수지，이용침지-모압법제비료일충용우자행차륜권찰차부위적EP/SiC/탄섬유(CF)복합재료마찰층양품，이용자제적열도솔측시장치연구료도열전료적함량대마찰층양품적열성능영향，병차대마찰층양품적후도규격삼수진행료우화。결과표명，마찰층양품수착시간적증가，표면온도축점승고체도평형；수착개성수지중도열전료적함량증가，마찰층양품평형온도승고，차승온속솔하강가쾌；마찰층양품적고온열도솔수착전료함량적증가이증대，불동후도마찰층양품적정치승온시간/후도적비치불동。종합고필，개성수지중도열전료질량분수위6%、후도위0.5 mm적복합재료마찰층괄용우복합재료자행차륜권적찰차결구。
In order to improve the braking performance of competitive bicycle,firstly, the modified resin was prepared by mixing the epoxy resin(EP) and silicon carbide(SiC), and the frictional layer sample of EP/SiC/carbon fiber (CF) composite for the braking part of bicycle wheel was made by immersion and mould pressing methods,and the influence of heat conduction filler on the thermal performance of the composite frictional layer sample was studied by using the thermal conductivity testing device made byself,also the thickness of frictional layer was optimized. The results show that the surface temperature of frictional layer sample gradually increases and reaches the balance with the time increasing, the equilibrium temperature of the composite frictional layer increases with the content of heat conduction filler in the modified resin increasing and the decrease of heating rate speed up. The thermal conductivity of the composite frictional layer on high temperature condition increases with the content of filler increasing, and the specific value of heat rising time and thickness is different with the thickness. Overall consideration,the 0.5 mm thickness composite frictional layer of bicycle wheel with 6%filler in the modified resin is suitable for the manufacture of braking structure of composite bicycle wheel.