微胶囊自修复复合材料断裂力学实验研究

【作者】 党旭丹；

【导师】 张恒；

【作者基本信息】 郑州大学 ， 复合材料， 2005， 硕士

【摘要】 本文进行微胶囊自修复复合材料的断裂力学实验研究。主要内容包括自修复复合材料的断裂力学设计、基体材料和微胶囊壳材料断裂韧性测试、夹层模拟试件断裂特性分析和含模拟胶囊试件裂纹穿透性验证实验四个部分。 对于这种新型自修复系统的断裂力学设计主要是:当自修复材料在外界条件作用下产生裂纹,裂纹前沿遇到含有修复剂的微胶囊时,微胶囊的壳必须破裂使其中的粘接剂能够流出,完成修复功能。断裂韧性的实验测试主要是建立测试系统,利用复合材料浇铸成型技术制作环氧树脂和不饱和聚酯树脂复合材料试件,获得每种配方材料试件的断裂韧性数值。与此同时,实验部分还测得每种材料试件的屈服强度和弹性模量。通过夹层模拟试件断裂特性分析得到了试件中裂纹的扩展规律。论文的最后一部分进行了含模拟胶囊试件裂纹穿透性验证实验,验证了裂纹扩展规律。更多还原

【Abstract】 The experimental research of fracture mechanics about self-healing composites that contain microcapsules is discussed in this paper which is composed of the following four parts: the fracture mechanics design of self-healing composites, the fracture toughness tests of the matrix and the shells of microcapsules, the fracture characteristics analysis of the sandwich simulating samples and the penetrability validating tests of sample that contains simulating capsule.The fracture mechanics design of this new type of self-healing system is mainly about that when there is a micro crack inside the composites under the effect of outside environment and the front part of the crack meets the microcapsules that contain adhesive agent, the shells of the microcapsules must break and let the inside adhesive agent pour out . Then the composites achieve their self-healing function. The laboratory tests of the fracture toughness is mainly about that establishing the whole system, utilizing the molding technology of composites to make samples that use epoxy and unsaturated resin and obtaining the fracture toughness numerical value of each combination sample. At the same time the subdued intensity and elastic module of the samples are also obtained. The propagation laws of the micro crack inside the samples are obtained through the fracture characteristics analysis of the sandwich simulating samples. At the end of the essay the penetrability validating tests of sample that contains simulating capsule are performed. And the tests verify the propagation laws of the micro crack inside the samples.更多还原