Abstract: In this work, the split Hopkinson pressure bar (SHPB) impact tests of plain concrete and concrete reinforced with metal meshes were carried out. It was found that adding metal meshes into plain concrete could improve its impact resistance performance. In addition, the effects of strain rate and parameters of metal meshes on the dynamic mechanical properties of specimens were analyzed under different working conditions. The results show that two types of materials both exhibit strain rate hardening effect. Increasing the volume fraction of metal meshes appropriately can further improve the impact resistance performance of specimens. In this test, when the wire diameter is 2 mm, the hole diameter is 12 mm and the layer of metal meshes is 2, the peak stress of the specimen is larger and the impact resistance performance is better. The peak stress of the specimen under 0.30 MPa, 0.45 MPa and 0.55 MPa is 61.2%, 55.2% and 49.7% higher than that of the plain concrete specimen under the same load. Finally, the finite element analysis software LS-DYNA was used to simulate the test, observe the whole destruction process of the specimen, and analyze the propagation law of the stress wave. This research can provide a technical reference for the promotion and application of concrete reinforced with metal meshes in protective engineering.
陈首, 石少卿, 何秋霖, 李季. 金属网增强混凝土抗冲击性能的试验研究与数值模拟[J]. 材料导报, 2020, 34(20): 20046-20052.
CHEN Shou, SHI Shaoqing, HE Qiulin, LI Ji. Experimental Study and Numerical Simulation on the Impact Resistance Performance of Concrete Reinforced with Metal Meshes. Materials Reports, 2020, 34(20): 20046-20052.
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2020, Vol. 34 
