周双双1,刘京红1,2,李兵兵3,张仕桦4,刘 婷5
周双双,刘京红,李兵兵,等.基于CT图像的混凝土细观损伤数值模拟研究[J].混凝土与水泥制品,2022(4):29-32.
ZHOU S S,LIU J H,LI B B,et al.Numerical Simulation Study of Concrete Microscopic Damage Based on CT Image[J].China Concrete and Cement Products,2022(4):29-32.
基于CT图像的混凝土细观损伤数值模拟研究
周双双1,刘京红1,2,李兵兵3,张仕桦4,刘 婷5
周双双,刘京红,李兵兵,等.基于CT图像的混凝土细观损伤数值模拟研究[J].混凝土与水泥制品,2022(4):29-32.
ZHOU S S,LIU J H,LI B B,et al.Numerical Simulation Study of Concrete Microscopic Damage Based on CT Image[J].China Concrete and Cement Products,2022(4):29-32.
摘 要:针对混凝土细观损伤机理进行了研究,将混凝土看作由骨料、砂浆和孔隙组成的细观多相复合材料,通过CT技术对其单轴压缩损伤机制进行了分析,并对所得结果处理后通过MIMICS软件建立了相应三维细观模型,结合ABAQUS工具进行了数值模拟研究。结果表明:数值模拟得到的混凝土损伤图可以较好地反映混凝土试件单轴受压的整个损伤过程;混凝土试件在单轴压缩试验中发生的是张拉-剪切复合破坏,数值模拟得到的应力、应变云图与试验结果相符。
Abstract: The mesoscopic damage mechanism of concrete was studied, and concrete was regarded as a meso multiphase composite material composed of aggregate, mortar and pore. The uniaxial compression damage mechanism was analyzed by CT technology. Based on the results, the corresponding 3D mesoscopic model was established by MIMICS software, and then numerical simulation was carried out using ABAQUS software. The results show that the whole damage process of concrete under uniaxial compression can be well reflected by numerical simulation, and the tensile-shear composite failure occurs in the uniaxial compression test. The stress-strain cloud diagram obtained by numerical simulation is consistent with the test results.
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