Effects of Fiber Distribution and Content on Performance of Engineered Cementitious Composite (ECC)  

作　　者：GUO Xiaolu WANG Sijia ZHANG Hongmei 郭晓潞;WANG Sijia;章红梅(Key Laboratory of Advanced Civil Engineering Materials Ministry of Education,Tongji University,Shanghai 201804,China;School of Materials Science and Engineering,Tongji University,Shanghai 201804,China;College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]Key Laboratory of Advanced Civil Engineering Materials Ministry of Education,Tongji University,Shanghai 201804,China [2]School of Materials Science and Engineering,Tongji University,Shanghai 201804,China [3]College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2021年第4期569-577,共9页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Key Research and Development Program of China (No. 2019YFE0112600);the Science and Technology Innovation Action Plan of Shanghai of China (No. 19DZ1204900);the Fundamental Research Funds for the Central Universities (Nos. 22120180087 and 2020QNA4018)。

摘　　要：The 21 dog-bone specimens with different fiber contents and fiber distribution (random chopped fiber or directional continuous filament fiber bundles) were designed and tested under uniaxial tension using domestic PVA (polyvinyl alcohol) fiber.High fiber content exerted positive influences on cracking stress,peak stress and deformation capacity of specimens with random chopped fiber,compared with the decrease shown in cracking stress of specimens containing directional fiber bundles.There were multiple cracks in specimens containing directional fiber bundles,while only 1-2 typical cracks could be shown in chopped fiber specimens after being broken.Random chopped fiber connected more closely with matrix compared with that only part of fiber bundles could contact with matrix.Double-fold line model and parabolic model could be used simultaneously to fit well with the uniaxial tension constitutive relations of engineered cementitious composite (ECC).Although the performance of PVA produced in China can not reach to the same level of those from Japan,there exists certain practical value in engineering according to its contribution to deformability of structure.

关 键 词：fiber reinforced cement composites fiber produced in China fiber distribution MICRO-MORPHOLOGY constitutive relation 

分 类 号：TB332[一般工业技术—材料科学与工程]