CAJ | 학술논문

为了分析麦秸/PP 复合材料老化后表面微观结构及其宏观力学性能之间关系,采用角测量技术(angle measure technique,AMT)方法研究了不同老化周期下复合材料表面微观结构电子显微镜(scanning electron microscope,SEM)图像的AMT尺度图谱,分析了图谱中特征角度、特征尺度与复合材料宏观力学性能随老化周期延长的变化关系.结果表明,随着老化周期的延长复合材料各项力学性能总体呈下降趋势,而其 AMT 图谱的特征角度和特征尺度总体则呈上升趋势.秸秆/PP复合材料表面的微观结构SEM图像AMT尺度图谱的特征角度、特征尺度与其诸多宏观力学性能存在着高度或极高的相关性.尤其是特征角度与弯曲强度具有高度相关性,两者的相关系数达到了-0.975.运用主成分分析方法对各老化周期平均角度(mean angle,MA)图谱数据的研究进一步证实了AMT方法的有效性和可分性.该研究证明,AMT方法能够较好地定量化描述复合材料微观结构的图像纹理复杂性,在测量信号、图像纹理复杂性定量描述和分析中具有极高的应用价值.
위료분석맥갈/PP 복합재료노화후표면미관결구급기굉관역학성능지간관계,채용각측량기술(angle measure technique,AMT)방법연구료불동노화주기하복합재료표면미관결구전자현미경(scanning electron microscope,SEM)도상적AMT척도도보,분석료도보중특정각도、특정척도여복합재료굉관역학성능수노화주기연장적변화관계.결과표명,수착노화주기적연장복합재료각항역학성능총체정하강추세,이기 AMT 도보적특정각도화특정척도총체칙정상승추세.갈간/PP복합재료표면적미관결구SEM도상AMT척도도보적특정각도、특정척도여기제다굉관역학성능존재착고도혹겁고적상관성.우기시특정각도여만곡강도구유고도상관성,량자적상관계수체도료-0.975.운용주성분분석방법대각노화주기평균각도(mean angle,MA)도보수거적연구진일보증실료AMT방법적유효성화가분성.해연구증명,AMT방법능구교호지정양화묘술복합재료미관결구적도상문리복잡성,재측량신호、도상문리복잡성정량묘술화분석중구유겁고적응용개치.
@@@@China is a traditional agricultural country, and the output of all kinds of crops straw in China has more than 7 tons according to some related statistics. As a kind of solid biomass waste, and also a kind of renewable resource, the comprehensive utilization rate of this material is not very high in China. In order to analyze the relationship between microscopic structure and macroscopic mechanical properties of wheat straw/polypropylene (PP) composites during aging experiments, AMT (angle measure technique) method was introduced to investigate scale spectra of scanning electronic microscope (SEM) images of surface microstructure of wheat straw/ PP composites at different aging periods in this study. With wheat straw powder as filler and polypropylene plastic film as matrix, wheat straw/PP composites were prepared by using compound mold pressing method. Accelerated UV aging test with xenon lamp was completed, and macroscopic mechanics properties of the composites were tested before and after aging. The microscopic surface morphology changes of the composites were observed using SEM at different aging period and the typical SEM images were taken simultaneously. After several necessary images preprocessing for SEM images, through AMT method the mean angle (MA) spectra of SEM images of the composites were derived, the changing relationships with the growing aging periods between characteristic angle & characteristic scale of spectra of composites and their macroscopic mechanics properties were analyzed as well. The results showed that with the increasing of aging periods mechanical properties of composites were on the decline as a whole, while characteristic angle & characteristic scale of MA spectra of them tended to increase overall. It was proved that there were significant or extremely significant correlations between characteristic angle&characteristic scale of microstructure image of composites and their macroscopic mechanics properties by using correlation analysis, especially the correlation coefficient between characteristic angle and flexural strength was significantly, which was-0.975. By using principal component analysis (PCA) the validity and discriminability of AMT method has been proved, differences of MA spectra of composites at different aging period can be described well by principal component 1 only. Unlike FFT (fast Fourier transform) and wavelet analysis, AMT methods is a thoroughly novel application of signal analysis in the measurement signal series, which can transforms the original signal domain to a very brand-new domain that is scale domain transform. It was verified that AMT method can well quantitative delineate the image texture of surface microstructure of the composite in this study. The works from our and other researchers have shown that AMT is capable of delivering very exact and discriminating characterizations of apparent features when confronted in description of texture complexity of digital images. AMT method has great values in quantitative delineating and analysis of complexity of measure series and image texture, so it can be expected that this approach will has wide employments and deep development in the future.