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1.长安大学 理学院,西安 710064
2.长安大学 西安市结构损伤数字化检测技术重点实验室,西安 710064
3.中国工程物理研究院总体工程研究所,绵阳 621900
DENG Qingtian, E-mail: dengqt@chd.edu.cn
Received:29 May 2023,
Revised:05 August 2023,
Published:15 February 2025
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许爽,邓庆田,李旺斐,等. 层合多孔结构的裂纹扩展规律研究[J]. 机械强度,2025,47(2):28-36.
XU Shuang,DENG Qingtian,LI Wangfei,et al. Study on the crack expansion low of laminated porous structure[J].Journal of Mechanical Strength,2025,47(2):28-36.
许爽,邓庆田,李旺斐,等. 层合多孔结构的裂纹扩展规律研究[J]. 机械强度,2025,47(2):28-36. DOI: 10.16579/j.issn.1001.9669.2025.02.004.
XU Shuang,DENG Qingtian,LI Wangfei,et al. Study on the crack expansion low of laminated porous structure[J].Journal of Mechanical Strength,2025,47(2):28-36. DOI: 10.16579/j.issn.1001.9669.2025.02.004.
基于六边形和内凹形两种基本构型,采用实验测试和有限元仿真的方法,对三点弯曲作用下层合多孔结构裂纹扩展规律进行了研究,讨论了胞元铺设方向的角度对层合多孔结构破坏形式、承载力和变形的影响。结果表明,双层模型的裂纹扩展路径会向裂纹扩展抑制能力较弱层的裂纹扩展路径偏转;强度低的一侧会发生更大的变形,从而导致模型向强度高的一侧偏转;在一些角度组合下,双层模型承载力和韧性相较于对应的单层模型有明显提升。
Based on two basic configurations of hexagonal and inner concave shapes
by utilizing experimental test and finite element simulation method
the crack expansion law of laminated porous structures under three-point bending was studied
the influence of cellular element angle of laying direction on failure mode
load capacity
and deformation of the laminated porous structures was discussed. The results indicate that the crack expansion path in the bilayer model deviates towards the weaker layer with less crack expansion inhibition capability. The weaker side experiences greater deformation
leading to a deviation of the model towards the stronger side. Under certain angle combinations
the bilayer model shows significantly improved load-bearing capacity and toughness compared to the corresponding single-layer model.
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