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dynamic Impact compressive Behavior Investigation of Sisal Fiber-reinforced Coral Seawater Concrete

Journal of Wuhan University of Technology(Materials Science) 2023年第5期38卷 1034-1043页

作者： MA Haiyan TAN Yongshan YU Hongfa YUE Chengjun ZHANG Yan Department of Airport and Civil Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China College of Civil Science and Engineering Yangzhou UniversityYangzhou 225i27China School of Civil Engineering Southeast UniversityNanjing 21118China

Split Hopkinson pressure bar(SHPB)was used to investigate the dynamic compressive properties of sisal fiber reinforced coral aggregate concrete(SFCAC).The results showed that,with the increase of strain rate,the dynamic compressive strength,peak strain and toughness index of SFCAC are all greater than its static properties,indicating that SFCAC is a kind of rate-sensitive material.When the sisal fiber was blended,the failure mode showed obvious ductility.At high strain rates,the SFCAC without sisal fiber specimen was comminuted,and the SFCAC showed a"cracked without breaking"state.The results indicated that the sisal fiber played a significant role in reinforcing and strengthening the properties of concrete.The finite element software LS-DYNA was used to simulate two working conditions with strain rates of 78 and 101 s-1.The stressstrain curves and failure patterns obtained were in good agreement with the experimental results.

关键词： coral aggregate concrete sisal fiber dynamic compressive strain-rate effect

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Quasi-static and dynamic compressive Fracture Behavior of SiC_f/SiC Composites

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Journal of Wuhan University of Technology(Materials Science) 2015年第3期30卷 484-488页

作者：高晓菊成来飞 YAN Dongming LI Liangjun Science and Technology on Thermostructural Composite Materials Laboratory Northwestern Polytechnical University No.52 Institute of China North Industry Group

To understand the quasi-static and dynamic compressive mechanical behavior of two- dimensional SiC fiber-reinforced SiC composites （2D-SiC1/SiC）, their compressive behavior at room temperature was investigated at a strain rate from 10-4 to 104/s, and the fracture surfaces and damage morphology were observed. The results show that the dynamic failure strength of 2D-SiC1/SiC obeys the Weibull distribution, and the Weibull modulus is 5,66. Meanwhile, 2D-SiC1/SiC presents a transition from brittle to tough with a decrease of strain rate, and 2D-SiC1/SiC has a more significant strain rate sensitivity compared to the 2D-C/SiC composites. The failure mode of 2D-SiC1/SiC depends upon the strain rate.

关键词： 2D-SiC1/SiC dynamic compressive SHPB WeibuU distribution failure mode

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