T300碳纤维复合材料损伤声发射特性研究

发布时间：2018-05-07 05:15

本文选题：T300碳纤维复合材料 + 声发射检测　；参考：《东北石油大学》2015年硕士论文

【摘要】：碳纤维复合材料如今被广泛应用于各大领域,如国防、医疗、建筑等尖端领域以及体育用品、太阳能等工业。正是因为其强度高、抗热冲击性好,比重小等优势使其得到广大重视并快速发展。但由于碳纤维复合材料的不同铺层方式以及基体与纤维的复合,使其在加工制造过程中难免会存在一些参数控制失误、人为操作不当等现象,使得复合材料质量不稳定或者存在一些缺陷,因此对碳纤维复合材料的缺陷检测以及不同铺层方式的损伤特性研究,为其能在实际工程中被更好的应用起到重要作用。T300碳纤维复合材料因其铺层方法各异,使其拉伸过程中损伤类型也不相同。本文应用ABAQUS有限元软件模拟[-45°/45°]14和[0°/90°]14两种铺层类型的碳纤维复合材料板拉伸断裂过程。对比分析两种试件在拉伸断裂过程中应力场分布特征和材料损伤的局部信息,得到不同铺层方式碳纤维复合材料材料的应力应变数值关系和损伤特征,为T300碳纤维复合材料的力学性能研究和声发射监测实验提供一定理论依据。通过[-45°/45°]14和[0°/90°]14两种铺层方式的碳纤维复合材料层合板的拉伸实验,研究试件拉伸断裂的力学特性和直观破坏过程。采集拉伸过程中的声发射信号,应用参数分析法对信号进行分析,得到不同损伤阶段声发射参量分布特征。并采用K均值聚类方法对材料各损伤阶段声发射信号进行模式识别,结合信号参量分布特征和碳纤维复合材料的微观损伤性能,判断不同铺层方式的各个阶段所产生的声发射信号所属的损伤类型,最终实现对[-45°/45°]14和[0°/90°]14两种铺层方式的碳纤维复合材料层合板拉伸破坏过程的模式识别,为评价这两种类型的碳纤维复合材料层合板提供实验依据。
[Abstract]:Carbon fiber composites are widely used in various fields, such as defense, medical, construction and other cutting-edge fields, sporting goods, solar energy and other industries. It is because of its high strength, good thermal impact resistance, small proportion and other advantages, it has been widely valued and rapid development. However, due to the different layering methods of carbon fiber composites and the combination of matrix and fiber, it is inevitable that there will be some errors in parameter control and improper artificial operation in the process of processing and manufacturing. The quality of the composite is unstable or there are some defects, so the defect detection of carbon fiber composite and the damage characteristics of different layering methods are studied. T300 carbon fiber composites have different types of damage in tensile process because of their different lamination methods. In this paper, ABAQUS finite element software is used to simulate the tensile fracture process of two kinds of laminated carbon fiber composite plates [-45 掳/ 45 掳] 14 and [0 掳/ 90 掳] 14. By comparing and analyzing the stress field distribution and the local damage information of the two specimens during tensile fracture, the stress-strain numerical relationship and damage characteristics of carbon fiber composites with different layering methods are obtained. It provides a theoretical basis for the study of mechanical properties and acoustic emission monitoring of T300 carbon fiber composites. The tensile tests of carbon fiber composite laminates with [-45 掳/ 45 掳] 14 and [0 掳/ 90 掳] 14 layers were carried out to study the mechanical properties of tensile fracture and the direct fracture process of the specimens. The acoustic emission signals during stretching are collected and analyzed by parameter analysis method. The distribution characteristics of acoustic emission parameters in different damage stages are obtained. The K-means clustering method is used to identify the acoustic emission signals in different damage stages of the materials. The characteristics of signal parameter distribution and the microscopic damage properties of carbon fiber composites are analyzed. The damage types of acoustic emission signals produced by different layering modes are judged, and the mode recognition of tensile failure process of carbon fiber composite laminates with [-45 掳/ 45 掳] 14 and [0 掳/ 90 掳] 14 is realized. It provides experimental basis for evaluating the two types of carbon fiber composite laminates.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB33

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