Investigation on mechanical properties regulation of rock-like specimens based on 3D printing and similarity quantification  

作　　者：Duanyang Zhuang Zexu Ning Yunmin Chen Jinlong Li Qingdong Li Wenjie Xu 

机构地区：[1]Center for Hypergravity Experiment and Interdisciplinary Research,Zhejiang University,Hangzhou 310058,China [2]MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering,Zhejiang University,Hangzhou 310058,China

出　　处：《International Journal of Mining Science and Technology》2024年第5期573-585,共13页矿业科学技术学报（英文版）

基　　金：the National Natural Science Foundation of China(Nos.51988101 and 42007262).

摘　　要：3D printing is widely adopted to quickly produce rock mass models with complex structures in batches,improving the consistency and repeatability of physical modeling.It is necessary to regulate the mechanical properties of 3D-printed specimens to make them proportionally similar to natural rocks.This study investigates mechanical properties of 3D-printed rock analogues prepared by furan resin-bonded silica sand particles.The mechanical property regulation of 3D-printed specimens is realized through quantifying its similarity to sandstone,so that analogous deformation characteristics and failure mode are acquired.Considering similarity conversion,uniaxial compressive strength,cohesion and stress–strain relationship curve of 3D-printed specimen are similar to those of sandstone.In the study ranges,the strength of 3D-printed specimen is positively correlated with the additive content,negatively correlated with the sand particle size,and first increases then decreases with the increase of curing temperature.The regulation scheme with optimal similarity quantification index,that is the sand type of 70/140,additive content of 2.5‰and curing temperature of 81.6℃,is determined for preparing 3D-printed sandstone analogues and models.The effectiveness of mechanical property regulation is proved through uniaxial compression contrast tests.This study provides a reference for preparing rock-like specimens and engineering models using 3D printing technology.

关 键 词：3D printing Mechanical property regulation Similarity quantification Rock analogue SANDSTONE 

分 类 号：TD315[矿业工程—矿井建设] TP391.73[自动化与计算机技术—计算机应用技术]