Study on uniaxial compression mechanical properties of 3D printed columnar joint test blocks

被引：0
作者：
Xu, Zhenbo [1 ]
Zhu, Zhende [1 ,2 ]
Jiang, Chao [1 ]
机构：
[1] Hohai Univ, Coll Civil Engn & Transportat, Nanjing 210098, Peoples R China
[2] Hohai Univ, Key Lab Minist Educ Geomech & Embankment Engn, Nanjing 210098, Peoples R China
来源：
SCIENTIFIC REPORTS | 2024年 / 14卷 / 01期
基金：
中国国家自然科学基金;
关键词：
3D printing; Columnar jointed rock mass; UV aging of ABS; Mechanical properties; Laboratory test; ROCK MASS; STRENGTH; BASALT;
D O I：
10.1038/s41598-024-81715-1
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The columnar joint skeleton of 3D printed Acrylonitrile Butadiene Styrene (ABS) material, the skeleton of cement mortar and ultraviolet aging treatment are combined to pour the columnar joint rock mass (CJRM) test block. The strength, deformation, energy and failure modes of the specimens with different dip angles were analyzed by uniaxial compression test. The influence of joint skeleton on the strength of the test block was analyzed. The effect of aging time on ABS parameters was evaluated. The results show that the uniaxial compressive strength and elastic modulus are ' U ' type with the increase of dip angle, the elastic strain energy is ' V ' type, and the dip angle of 45 degrees is the minimum value. The four failure modes are: shear failure, splitting failure, shear tensile mixed failure, shear splitting mixed failure. The anisotropy of CJRM is extremely high. The skeleton reduces the strength and elastic modulus of the solid test block, and has the greatest influence on the strength of the test block with dip angle of 75 degrees. With the increase of aging time, the strength and deformation parameters of ABS decreased, and the yellowness index and infrared spectrum peak area increased.
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页数：16
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