论文部分内容阅读
1.复合材料的化学结构与其性能之间的基本关系有些复合材料的性能取决于纤维质地还有一些复合材料则取决于它的基体就高性能的复合材料的应用而言,制品的结构、聚合作用和高分子结构的种类必须与其基体的性质相适应。一方面适用于树脂的抗剪强度和抗屈应力所得的数值,另一方面适用于复合材料层间的抗剪应力(ILSS)所得到的数值是近似的。温度影响分子间的活化过程,进而决定其强度的大小,在高温条件下高交联密度往往大幅度的增加而在低温情况下则相应地减少。高极性会引起周围温度的增加,并且使强度对温度的依赖性更加显著。吸湿会降低高温强度。横向的强度主要地取决于树脂的延伸率。它通常低于抗剪应力(ILSS),但是从百分之十左右的延伸率来看,它达到一个近似值。高交联密度会减少横向间的强度,因为树脂性能变得更脆弱了。此外,交变的动态阻力由于它主要取决于纤维和树脂模数而得到相应的提高。
1. The basic relationship between the chemical structure of a composite and its properties Some composite properties depend on the fiber texture Some composite materials depend on their matrix For high performance composite applications, the structure of the product, the polymerization The role and the type of polymer structure must be compatible with the nature of its matrix. The values obtained on the one hand for the shear strength and the resistance to flexing of the resin and on the other hand for the shear stress (ILSS) between the layers of the composite material are approximated. Temperature affects the activation process between molecules, which in turn determines the strength of the size of the high cross-linking density at high temperatures tend to substantially increase in the case of low temperature is reduced accordingly. High polarity will cause the ambient temperature increases, and the intensity of the temperature dependence is more significant. Moisture will reduce the high temperature strength. The strength of the transverse direction mainly depends on the elongation of the resin. It is usually below the shear stress (ILSS), but it reaches an approximation from an elongation of about ten percent. High cross-link density reduces cross-directional strength as the resin properties become more fragile. In addition, the dynamic resistance of alternating changes is correspondingly enhanced by the fact that it depends mainly on the fiber and resin moduli.