钢纤维对双丝拉拔试件动态破裂性能的影响

TB333; 采用RFPA2D-dynamics软件,考虑各相材料的细观非均匀分布,建立双丝拉拔动态数值模型,研究动荷载作用下钢纤维体积分数变化对双丝拉拔试件力学性能的影响.从细观单元的弹性损伤本构关系出发,分析不同钢纤维体积分数试件从微裂纹萌生、扩展直至贯通的动态拉拔破坏过程,得到不同钢纤维体积分数试件的荷载-位移曲线和声发射累积能量曲线.结果表明,在动载作用下,钢纤维体积分数变化对试件破坏模式影响较大.随着钢纤维体积分数的增加,试件的耗能水平先增加后降低.钢纤维体积分数为1.6％时,试件的耗能水平最高,是素混凝土试件的1.36倍....

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Published in深圳大学学报（理工版） Vol. 38; no. 2; pp. 136 - 143
Main Authors 张亚芳, 郭中祥, 刘浩, 何娟, 卢娟
Format Journal Article
LanguageChinese
Published 深圳市市政设计研究院有限公司,广东深圳518029 30.03.2021
广州大学土木工程学院,广东广州510006%广州大学土木工程学院,广东广州510006
Subjects
声发射
双丝拉拔
动态破坏过程
微裂纹
混凝土
钢纤维
Online AccessGet full text
ISSN1000-2618
DOI10.3724/SP.J.1249.2021.02136

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Abstract TB333; 采用RFPA2D-dynamics软件,考虑各相材料的细观非均匀分布,建立双丝拉拔动态数值模型,研究动荷载作用下钢纤维体积分数变化对双丝拉拔试件力学性能的影响.从细观单元的弹性损伤本构关系出发,分析不同钢纤维体积分数试件从微裂纹萌生、扩展直至贯通的动态拉拔破坏过程,得到不同钢纤维体积分数试件的荷载-位移曲线和声发射累积能量曲线.结果表明,在动载作用下,钢纤维体积分数变化对试件破坏模式影响较大.随着钢纤维体积分数的增加,试件的耗能水平先增加后降低.钢纤维体积分数为1.6％时,试件的耗能水平最高,是素混凝土试件的1.36倍.
AbstractList TB333; 采用RFPA2D-dynamics软件,考虑各相材料的细观非均匀分布,建立双丝拉拔动态数值模型,研究动荷载作用下钢纤维体积分数变化对双丝拉拔试件力学性能的影响.从细观单元的弹性损伤本构关系出发,分析不同钢纤维体积分数试件从微裂纹萌生、扩展直至贯通的动态拉拔破坏过程,得到不同钢纤维体积分数试件的荷载-位移曲线和声发射累积能量曲线.结果表明,在动载作用下,钢纤维体积分数变化对试件破坏模式影响较大.随着钢纤维体积分数的增加,试件的耗能水平先增加后降低.钢纤维体积分数为1.6％时,试件的耗能水平最高,是素混凝土试件的1.36倍.
Author 何娟
刘浩
郭中祥
张亚芳
卢娟
AuthorAffiliation 广州大学土木工程学院,广东广州510006%广州大学土木工程学院,广东广州510006;深圳市市政设计研究院有限公司,广东深圳518029
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LU Juan
ZHANG Yafang
LIU Hao
HE Juan
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Keywords 声发射
双丝拉拔
动态破坏过程
微裂纹
混凝土
钢纤维
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Publisher 深圳市市政设计研究院有限公司,广东深圳518029
广州大学土木工程学院,广东广州510006%广州大学土木工程学院,广东广州510006
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Title 钢纤维对双丝拉拔试件动态破裂性能的影响
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