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Compressive behaviors of ultra-low-weight foamed cement-based composite reinforced by polypropylene short fibers
International Journal of Damage Mechanics ( IF 4.2 ) Pub Date : 2020-03-08 , DOI: 10.1177/1056789520908638
Yuanyi Yang 1, 2 , Qi Zhou 3 , Yi Deng 4, 5 , Jinhui Lin 1
Affiliation  

With advantages in sustainability, low thermal conductivity, and self-weight, the foamed cement-based composites have captured tremendous attention in various low strength structural and nonstructural applications. This paper aimed to investigate the effects of the short polypropylene fibers on the quasi-static compression performance of the ultra-low-weight foamed cement-based composites. The results show that the elasticity modulus, peak strength, and ultimate linear strength of the fiber-reinforced composites are increased by 208%, 42%, and 71%, respectively. The plateau stress and the densification strain energy of fiber-reinforced composites are improved by up to 49% and 47%. Simultaneously, the failure mode of the fibrous sample is altered from a brittle behavior to plastic behavior. The significance of this work shows that short synthetic fibers can improve the compressive capacity considerably, turning out to be an effective strategy for obtaining higher mechanical strengths associated with ultra-low-weight typical cement-based elements. According to the experiment results, a constructive damage model is carried out to describe the compressive properties of short PP fiber-reinforced composites. Thus, such theoretical curves can describe the compression behavior successfully and can be potentially applied in practical project and numerical simulation. This work can also be useful toward the foundation of optimal design for toughening behavior in fiber-reinforced lightweight cement elements.

中文翻译:

聚丙烯短纤维增强超轻泡沫水泥基复合材料的压缩行为

泡沫水泥基复合材料具有可持续性、低导热性和自重等优点,在各种低强度结构和非结构应用中引起了极大的关注。本文旨在研究聚丙烯短纤维对超低重量泡沫水泥基复合材料准静态压缩性能的影响。结果表明,纤维增强复合材料的弹性模量、峰值强度和极限线性强度分别提高了208%、42%和71%。纤维增强复合材料的平台应力和致密化应变能分别提高了49%和47%。同时,纤维样品的失效模式从脆性行为改变为塑性行为。这项工作的意义表明,短合成纤维可以显着提高压缩能力,结果证明是获得与超低重量典型水泥基元件相关的更高机械强度的有效策略。根据实验结果,建立了一种构造损伤模型来描述短PP纤维增强复合材料的压缩性能。因此,这样的理论曲线可以成功地描述压缩行为,并且可以潜在地应用于实际项目和数值模拟中。这项工作也有助于为纤维增强轻质水泥元件的增韧行为的优化设计奠定基础。事实证明,这是获得与超低重量典型水泥基元件相关的更高机械强度的有效策略。根据实验结果,建立了一种构造损伤模型来描述短PP纤维增强复合材料的压缩性能。因此,这样的理论曲线可以成功地描述压缩行为,并且可以潜在地应用于实际项目和数值模拟中。这项工作也有助于为纤维增强轻质水泥元件的增韧行为的优化设计奠定基础。事实证明,这是获得与超低重量典型水泥基元件相关的更高机械强度的有效策略。根据实验结果,建立了一种构造损伤模型来描述短PP纤维增强复合材料的压缩性能。因此,这样的理论曲线可以成功地描述压缩行为,并且可以潜在地应用于实际项目和数值模拟中。这项工作也有助于为纤维增强轻质水泥元件的增韧行为的优化设计奠定基础。这样的理论曲线可以成功地描述压缩行为,并且可以潜在地应用于实际项目和数值模拟。这项工作也有助于为纤维增强轻质水泥元件的增韧行为的优化设计奠定基础。这样的理论曲线可以成功地描述压缩行为,并且可以潜在地应用于实际项目和数值模拟。这项工作也有助于为纤维增强轻质水泥元件的增韧行为的优化设计奠定基础。
更新日期:2020-03-08
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