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当用石墨纤维逐渐取代纯玻璃纤维增强材料时,复合材料的经向破坏应力与应变除剪切外,对所有的加载方式而言都迅速减小,与此同时,拉伸和压缩刚度则显著提高。相反地,将某些玻璃纤维加入石墨纤维复合材料中,它的强度随着石墨纤维含量的降低而按比例地降低。在玻璃纤维和石墨纤维所有的混合比例中扭转剪切最大应力约为560公斤/厘米~2。大多数横向力学性能均因玻璃纤维逐渐被石墨纤维取代而线性下降。 弯曲模量的大小不仅与石墨纤维的含量有关,而且和石墨层距离层压板中心面的远近有关,它可以用近代的双向层合板理论来计算。已经肯定,加入少量单向石墨纤维可在很大程度上提高复合材料的刚度,这正是玻璃-石墨纤维混合作用的一个最大特点。
When pure graphite fiber is used to replace pure glass fiber reinforced material, the rupture stress and strain of the composite rapidly decrease except for shearing for all the loading methods, meanwhile, the tensile and compressive stiffness are significant improve. Conversely, adding some glass fibers to the graphite fiber composite material, its strength decreases proportionally with decreasing graphite fiber content. The maximum shear stress at twisting in all mixing ratios of glass fiber and graphite fiber is about 560 kg / cm2. Most of the transverse mechanical properties are linearly decreased due to the gradual replacement of glass fibers with graphite fibers. The size of the flexural modulus is not only related to the content of graphite fibers, but also relates to the distance between the graphite layer and the center of the laminate. It can be calculated by the modern bidirectional laminate theory. It has been affirmed that adding a small amount of unidirectional graphite fiber can greatly improve the stiffness of the composite material, which is one of the most prominent features of the glass-graphite fiber mixing effect.