碳纤维织物增强水泥基复合材料试验研究

发布时间：2018-05-07 21:58

本文选题：织物增强水泥基复合材料 + 碳纤维织物　；参考：《湖南大学学报(自然科学版)》2017年11期

【摘要】：采用轴向拉伸试验研究了碳纤维织物增强水泥基复合材料(TRC)的静力力学性能,试验工况考虑了配网率、短切钢纤维以及碳纤维织物上的预拉力3个因素.试验结果表明:没有掺加短切钢纤维的薄板,随着配网率的增加,碳纤维织物利用率降低,试验过程中纤维层与水泥基层逐渐分离,最终薄板发生剥离破坏;对碳纤维织物施加预拉力能使薄板的开裂应力提高,从而提高TRC构件的正常使用寿命;在薄板中掺入短切钢纤维有助于提高其界面性能,进而使薄板抗拉强度、极限应变均得以提高;与施加预拉力相比,掺入短切钢纤维对薄板力学性能的改善更加显著;对碳纤维织物施加预拉力的同时在薄板中掺入1%的短切钢纤维可显著提高碳纤维的利用率,薄板破坏时碳纤维被完全拉断.
[Abstract]:The static mechanical properties of carbon fiber reinforced cement matrix composites (TRC) were studied by axial tensile test. Three factors were taken into account in the test conditions: distribution ratio, short cut steel fiber and pretensile force on carbon fiber fabric. The test results show that the carbon fiber fabric utilization ratio decreases with the increase of the distribution ratio, and the fiber layer is gradually separated from the cement base during the test, and finally the sheet is peeled and destroyed. Applying pretensile force to carbon fiber fabric can increase the cracking stress of thin plate, thus improve the normal service life of TRC member, and adding short cut steel fiber into thin plate can improve the interfacial properties and further make the sheet tensile strength. Compared with pretensile force, the mechanical properties of thin plate were improved by adding short cut steel fiber. When pretensile force is applied to carbon fiber fabric and 1% short cut steel fiber is added into thin sheet, the utilization ratio of carbon fiber can be improved significantly. When the sheet is destroyed, carbon fiber is completely broken.
【作者单位】：湖南大学工程结构损伤诊断湖南省重点实验室;湖南大学土木工程学院;
【基金】：国家自然科学基金资助项目(51378199) 长沙市科技计划项目(kq1701032)~~
【分类号】：TU599

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