本文選題：T300碳纖維復合材料 + 聲發(fā)射檢測��； 參考：《東北石油大學》2015年碩士論文

【摘要】：碳纖維復合材料如今被廣泛應用于各大領域,如國防、醫(yī)療、建筑等尖端領域以及體育用品、太陽能等工業(yè)。正是因為其強度高、抗熱沖擊性好,比重小等優(yōu)勢使其得到廣大重視并快速發(fā)展。但由于碳纖維復合材料的不同鋪層方式以及基體與纖維的復合,使其在加工制造過程中難免會存在一些參數控制失誤、人為操作不當等現(xiàn)象,使得復合材料質量不穩(wěn)定或者存在一些缺陷,因此對碳纖維復合材料的缺陷檢測以及不同鋪層方式的損傷特性研究,為其能在實際工程中被更好的應用起到重要作用。T300碳纖維復合材料因其鋪層方法各異,使其拉伸過程中損傷類型也不相同。本文應用ABAQUS有限元軟件模擬[-45°/45°]14和[0°/90°]14兩種鋪層類型的碳纖維復合材料板拉伸斷裂過程。對比分析兩種試件在拉伸斷裂過程中應力場分布特征和材料損傷的局部信息,得到不同鋪層方式碳纖維復合材料材料的應力應變數值關系和損傷特征,為T300碳纖維復合材料的力學性能研究和聲發(fā)射監(jiān)測實驗提供一定理論依據。通過[-45°/45°]14和[0°/90°]14兩種鋪層方式的碳纖維復合材料層合板的拉伸實驗,研究試件拉伸斷裂的力學特性和直觀破壞過程。采集拉伸過程中的聲發(fā)射信號,應用參數分析法對信號進行分析,得到不同損傷階段聲發(fā)射參量分布特征。并采用K均值聚類方法對材料各損傷階段聲發(fā)射信號進行模式識別,結合信號參量分布特征和碳纖維復合材料的微觀損傷性能,判斷不同鋪層方式的各個階段所產生的聲發(fā)射信號所屬的損傷類型,最終實現(xiàn)對[-45°/45°]14和[0°/90°]14兩種鋪層方式的碳纖維復合材料層合板拉伸破壞過程的模式識別,為評價這兩種類型的碳纖維復合材料層合板提供實驗依據。
[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 擄/ 45 擄] 14 and [0 擄/ 90 擄] 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 擄/ 45 擄] 14 and [0 擄/ 90 擄] 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 擄/ 45 擄] 14 and [0 擄/ 90 擄] 14 is realized. It provides experimental basis for evaluating the two types of carbon fiber composite laminates.
【學位授予單位】：東北石油大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TB33

【參考文獻】

相關碩士學位論文 前1條

1 王勇;固體火箭發(fā)動機復合材料零件完整性分析[D];南京理工大學;2004年

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本文編號：1855549