大曲率復合材料結(jié)構(gòu)的缺陷特征與超聲檢測
發(fā)布時間:2019-04-25 12:10
【摘要】:采用超聲回波法對大曲率碳纖維增強樹脂基復合材料零件進行超聲A-掃描,并對缺陷進行定位。結(jié)合缺陷區(qū)域和非缺陷區(qū)域的細觀形貌金相圖、宏觀表面狀態(tài)以及厚度測量結(jié)果的對比分析,討論了缺陷形態(tài)與其回波波形特征的對應關系,以及缺陷可能的形成原因。結(jié)果表明,缺陷在細觀尺度上呈現(xiàn)多處分層、氣孔和孔隙密集缺陷,在宏觀尺度上表現(xiàn)為零件表面貧膠與厚度增厚。缺陷的性質(zhì)與超聲A-掃描的檢測結(jié)果相吻合,缺陷的位置集中在零件大曲率部位,其形成原因與復合材料制造工藝密切相關。
[Abstract]:Ultrasonic A-scan of large curvature carbon fiber reinforced resin matrix composite parts was carried out by ultrasonic echo method, and defects were located. Based on the microstructure metallograph, macro-surface state and thickness measurement results of defect region and non-defect region, the corresponding relationship between defect shape and echo waveform characteristics and the possible causes of defect formation are discussed. The results show that the defects are layered in many places on the meso-scale, and the pores and pores are dense. On the macro-scale, the defects are thin and thickened on the surface of the parts. The property of the defect is consistent with the results of ultrasonic A-scan. The position of the defect is concentrated in the part with large curvature, and the cause of its formation is closely related to the manufacturing process of the composite material.
【作者單位】: 沈陽飛機工業(yè)(集團)有限公司理化測試中心;沈陽飛機工業(yè)(集團)有限公司工程技術中心;
【分類號】:TB332;TQ327.3
本文編號:2465077
[Abstract]:Ultrasonic A-scan of large curvature carbon fiber reinforced resin matrix composite parts was carried out by ultrasonic echo method, and defects were located. Based on the microstructure metallograph, macro-surface state and thickness measurement results of defect region and non-defect region, the corresponding relationship between defect shape and echo waveform characteristics and the possible causes of defect formation are discussed. The results show that the defects are layered in many places on the meso-scale, and the pores and pores are dense. On the macro-scale, the defects are thin and thickened on the surface of the parts. The property of the defect is consistent with the results of ultrasonic A-scan. The position of the defect is concentrated in the part with large curvature, and the cause of its formation is closely related to the manufacturing process of the composite material.
【作者單位】: 沈陽飛機工業(yè)(集團)有限公司理化測試中心;沈陽飛機工業(yè)(集團)有限公司工程技術中心;
【分類號】:TB332;TQ327.3
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