本文選題：復合材料 + 波紋褶皺�。� 參考：《玻璃鋼/復合材料》2017年08期

【摘要】：對含波紋褶皺缺陷的玻璃纖維單向復合材料進行壓縮試驗,結(jié)合聲發(fā)射(Acoustic Emission,簡稱"AE")和數(shù)字圖像相關(guān)(Digital Image Correlation,簡稱"DIC")互補技術(shù),研究復合材料波紋褶皺區(qū)域的損傷變形與演化規(guī)律。在復合材料試件壓縮加載的過程中,采集波紋褶皺區(qū)域損傷變形場、應(yīng)變場信息和實時聲發(fā)射監(jiān)測信號,分析復合材料壓縮力學響應(yīng)行為與缺陷區(qū)域變形場、應(yīng)變場以及聲發(fā)射信號特征之間的對應(yīng)關(guān)系。結(jié)果表明:波紋褶皺會嚴重影響復合材料的力學性能,通過分析聲發(fā)射信號,發(fā)現(xiàn)隨著波紋褶皺寬高比減小,復合材料的力學性能呈現(xiàn)降低的趨勢;當波紋褶皺寬高比一定時,隨著波紋褶皺高度不斷增加,復合材料的力學性能呈現(xiàn)降低的趨勢。通過DIC測得的應(yīng)變場與位移場信息,發(fā)現(xiàn)對于相同的載荷增量,最大應(yīng)變呈增加趨勢,且波紋褶皺寬高比越大應(yīng)變增幅越大;越趨近于褶皺中部,水平位移越大,加載方向位移與試件失穩(wěn)破壞位置有關(guān),接近破壞區(qū)域的加載方向位移大。損傷區(qū)域位移場和應(yīng)變場清晰地反映了玻璃纖維復合材料的損傷變形特征。
[Abstract]:The compression test of unidirectional glass fiber composites with corrugated fold defects was carried out, and the damage deformation and evolution of the corrugated fold region of composites were studied by combining the complementary techniques of Acoustic emission (AE) and digital image correlation (DIC). During the compression loading of composite material, the damage and deformation field, strain field information and real time acoustic emission monitoring signal of corrugated fold region are collected, and the compressive mechanical response behavior and the deformation field in defect region of composite material are analyzed. The corresponding relationship between strain field and acoustic emission signal. The results show that corrugated folds will seriously affect the mechanical properties of the composites. By analyzing the acoustic emission signals, it is found that the mechanical properties of the composites decrease with the decrease of the ratio of width to height of the ripple folds, and when the ratio of the width to the height of the ripple folds is fixed, With the increasing of corrugated fold height, the mechanical properties of the composites decrease. According to the information of strain field and displacement field measured by DIC, it is found that the maximum strain tends to increase for the same load increment, and the larger the ratio of width to height of corrugated fold is, the larger the strain increases, and the closer to the middle part of the fold, the greater the horizontal displacement is. The loading direction displacement is related to the failure position of the specimen, and the loading direction displacement near the failure region is large. The displacement and strain fields in the damage zone clearly reflect the damage and deformation characteristics of glass fiber composites.
【作者單位】： 河北大學無損檢測研究所;承德石油高等專科學校資產(chǎn)與后勤管理處;
【基金】：河北省教育廳重點項目(ZD2016097) 河北省自然科學基金(F2015201215) 河北大學校級項目(799207217089)
【分類號】：TB33

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