The Theory of Critical Distances to assess the effect of cracks/manufacturing defects on the static strength of 3D-printed concrete

The Theory of Critical Distances to assess the effect of cracks/manufacturing defects on the static strength of 3D-printed concrete
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用于评估裂缝/制造缺陷对 3D 打印混凝土静态强度影响的临界距离理论

DOI:
10.1016/j.engfracmech.2022.108563
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发表时间:
2022
影响因子:
5.4
通讯作者:
Alanazi N
Alanazi N
中科院分区:
工程技术2区
文献类型:
--
作者:
Alanazi N

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本文涉及使用临界距离理论来模拟静态负载下3D打印混凝土中裂缝和制造缺陷的有害影响。所提出的方法的鲁棒性是根据一些实验结果进行评估的,这些实验结果是通过在三点弯曲下测试3D打印的矩形截面试样产生的,这些试样被锯切裂纹样的尖锐缺口、表面粗糙度(由于挤出丝)和制造缺陷所削弱。实验和预测模型之间的良好一致性使我们能够证明临界距离理论不仅是一种可靠的设计方法,而且是一种适用于有效指导和通知增材制造过程的强大工具。
The present paper deals with the use of the Theory of Critical Distances to model the detrimental effect of cracks and manufacturing defects in 3D-printed concrete subjected to static loading. The robustness of the proposed approach was assessed against a number of experimental results that were generated by testing, under three-point bending, 3D-printed rectangular section specimens weakened by saw-cut crack-like sharp notches, surface roughness (due to the extrusion filaments) and manufacturing defects. The sound agreement between experiments and predictive model allowed us to demonstrate that the Theory of Critical Distances is not only a reliable design approach, but also a powerful tool suitable for guiding and informing effectively the additive manufacturing process.
DOI: 10.1016/j.matdes.2014.12.026
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影响因子: 8.4
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