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首页> 外文期刊>Construction and Building Materials >Impact resistance, flexural and tensile properties of amorphous metallic fiber-reinforced cementitious composites according to fiber length
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Impact resistance, flexural and tensile properties of amorphous metallic fiber-reinforced cementitious composites according to fiber length

机译：根据纤维长度的非晶金属纤维增强水泥复合材料的抗冲击性，弯曲和拉伸性能

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摘要

In this study, we examined the effects of the lengths of amorphous metallic fibers on the flexural and tensile properties and the impact resistance of cementitious composites. Cementitious composites were fabricated following the addition of 1.0 or 2.0 vol% of amorphous metallic fibers (lengths of 15 or 30 mm). After the static flexural and tensile tests, high-velocity impact tests were conducted (impact velocities of 170 and 300 m/s) with a spherical projectile (diameter of 25 mm). Amorphous metallic fibers with lengths of 30 mm inhibited the propagation of fractures based on the absorption and distribution of stress until they fractured without being pulled out, which significantly improved the flexural and tensile properties of cementitious composites; this resulted in better inhibition of scabbing in fibers with lengths of 30 mm compared to fibers with lengths of 15 mm. Meanwhile, the amorphous metallic fibers with lengths of 15 mm were pulled out from the matrix owing to their relatively smaller bonding areas compared with the 30 mm fibers. This caused smaller improvements in flexural and tensile properties as well as impact resistance compared with the 30 mm fibers. (C) 2020 Elsevier Ltd. All rights reserved.
机译：在这项研究中，我们研究了无定形金属纤维长度对胶形复合材料的弯曲和拉伸性能和抗冲击性的影响。在添加1.0或2.0Vol％的无定形金属纤维（长度为15或30mm）后，​​制造水泥复合材料。在静态弯曲和拉伸试验之后，用球形射弹（直径为25mm）进行高速冲击试验（170和300米/秒的冲击速度）。长度为30毫米的无定形金属纤维抑制了骨折的传播，基于压力的吸收和分布，直到它们破裂而不被拉出，这显着提高了水泥复合材料的弯曲和拉伸性能;这导致与长度为15mm的纤维相比，更好地抑制长度为30mm的纤维。同时，与30mM纤维相比，由于其相对较小的粘合区域，从基质中拉出长度为15mm的非晶金属纤维。与30mM纤维相比，这导致弯曲和拉伸性能的改善以及抗冲击性较小。 （c）2020 elestvier有限公司保留所有权利。

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  • 来源
    《Construction and Building Materials》 |2021年第15期|121872.1-121872.13|共13页
  • 作者

    Lee Sangkyu; Kim Gyuyong; Kim Hongseop; Son Minjae; Choe Gyeongcheol; Kobayashi Koichi; Nam Jeongsoo;

  • 作者单位

    Chungnam Natl Univ Dept Architectural Engn 99 Daehak Ro Daejeon 34134 South Korea;

    Chungnam Natl Univ Dept Architectural Engn 99 Daehak Ro Daejeon 34134 South Korea;

    Korea Inst Civil Engn & Bldg Technol Dept Living & Built Environm Res Bldg Safety Res Ctr 283 Goyang Daero Goyang Si 10223 Gyeonggi Do South Korea;

    Chungnam Natl Univ Dept Architectural Engn 99 Daehak Ro Daejeon 34134 South Korea;

    Chungnam Natl Univ Dept Architectural Engn 99 Daehak Ro Daejeon 34134 South Korea;

    Gifu Univ Fac Engn Dept Civil Engn 1-1 Yanagido Gifu 5011193 Japan;

    Chungnam Natl Univ Dept Architectural Engn 99 Daehak Ro Daejeon 34134 South Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Amorphous metallic fiber; Flexural property; Tensile property; Impact resistance; High-velocity impact test;

    机译：无定形金属纤维;弯曲性能;拉伸性能;抗冲击性;高速冲击试验;
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