深圳大学学报（理工版）2017，Vol.34Issue(5)：476-481,6.DOI:10.3724/SP.J.1249.2017.05476
界面厚度对双丝拉拔混凝土力学性能的影响
Influence of interface thickness on twin fiber pull-out test of concrete
摘要
Abstract
Meso-level heterogeneous distribution of interface mechanical parameters is investigated.Numerical models for twin fibers pull-out test are created by using 3D finite element method.Influence of interface thickness on damage pattern and mechanical properties is studied on twin fibers pull-out test specimens.By applying load with displacement control,load-displacement curves,acoustic emission (AE) accumulative curves and interface shear stress distribution curves of twin fibers and concrete matrix specimen are plotted.The damage pattern and AE pattern of pull-out test specimen vary along with the interface strength.The thicker the interface is,the higher the interface capacity for transferring stress and high shear strength.The splitting of fibers could happen later than the specimen with thin interface.In addition,appropriate thick interface benefits the improved peak load and toughness.关键词
混凝土/细观力学/双丝拉拔/界面厚度/声发射/峰值荷载/韧度Key words
concrete/meso-mechanical/double fiber pull-out test/interface strength/acoustic emission/peak load/toughness分类
通用工业技术引用本文复制引用
张亚芳,高照,刘浩,何娟..界面厚度对双丝拉拔混凝土力学性能的影响[J].深圳大学学报（理工版）,2017,34(5):476-481,6.基金项目
国家自然科学基金资助项目(51678170,51278136) （51678170,51278136）
广州市科技创新平台资助项目(15180005)National Natural Science Foundation of China (51678170,51278136) （15180005）
Guangzhou Science and Technology Project (15180005) （15180005）
