Experimental study on the resistance of the ultra high toughness cementitious composites material-fiber concrete composite targets subjected to twice projectiles impact

WU Ping; ZHOU Fei; LI Qinghua; XU Shilang; CHEN Bokun

doi:10.11883/bzycj-2021-0178

Volume 42 Issue 3

Apr. 2022

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WU Ping, ZHOU Fei, LI Qinghua, XU Shilang, CHEN Bokun. Experimental study on the resistance of the ultra high toughness cementitious composites material-fiber concrete composite targets subjected to twice projectiles impact[J]. Explosion And Shock Waves, 2022, 42(3): 033301. doi: 10.11883/bzycj-2021-0178

Citation:

WU Ping, ZHOU Fei, LI Qinghua, XU Shilang, CHEN Bokun. Experimental study on the resistance of the ultra high toughness cementitious composites material-fiber concrete composite targets subjected to twice projectiles impact[J]. Explosion And Shock Waves, 2022, 42(3): 033301. doi: 10.11883/bzycj-2021-0178

Citation:

WU Ping, ZHOU Fei, LI Qinghua, XU Shilang, CHEN Bokun. Experimental study on the resistance of the ultra high toughness cementitious composites material-fiber concrete composite targets subjected to twice projectiles impact[J]. Explosion And Shock Waves, 2022, 42(3): 033301. doi: 10.11883/bzycj-2021-0178

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Experimental study on the resistance of the ultra high toughness cementitious composites material-fiber concrete composite targets subjected to twice projectiles impact

doi: 10.11883/bzycj-2021-0178

Institute of Advanced Engineering Structures, Zhejing University, Hangzhou 310058, Zhejiang, China

Received Date: 2021-05-08
Rev Recd Date: 2021-07-08

Available Online: 2022-03-08

Publish Date: 2022-04-07

Abstract

Abstract

Ultra high toughness cementitious composites (UHTCC) have ultra-high toughness, good durability and excellent energy consumption effect. These characteristics make UHTCC have broad applications in protection engineering. To better investigate the penetration resistance of UHTCC composite structure subjected to second strike conditions, the basic mechanical parameters of the UHTCC and polyvinl alcohol fiber reinforced concrete (FRC) were measured first. Then, a 25 mm caliber ballistic smoothbore gun was used against a cylindrical UHTCC, FRC and UHTCC-FRC composite targets with a diameter of 750 mm and a height of 600 mm. The targets were subjected to two-time penetration tests of 550 m/s. The damage data of the projectile and the three types of targets were obtained, including the penetration depth of the projectile, the abrasion of the projectile, the crater diameter and area of the target’s strike surface, the crater depth, the number of cracks and the maximum crack width on the strike surface. On this basis, the influence of aggregate, structure type and distance between two strikes on the penetration resistance of UHTCC composite targets was analyzed. The results show that under the same test conditions, compared with the normal concrete and ultra-high performance concrete, the UHTCC can effectively reduce the crater diameter of the strike surface, but the penetration depth of the projectile increases; the 50mm UHTCC placing on the front surface of the functionally graded target can effectively reduce the cratering diameter of the strike surface; the secondary penetration depth of the projectile is greater than the primary penetration depth of the projectile, and the crater area of the target under the secondary impact is smaller than the crater area of the target under the first impact.
- ultra high toughness cementitious composites,
- polyvinl alcohol fiber reinforced concrete,
- UHTCC FRC composite targets,
- second penetration test,
- crater area

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References(40)

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