Size effects in the uniaxial compressive properties of 3D printed models of rocks:an experimental investigation
作者机构：School of Mechanics&Civil EngineeringChina University of Mining&Technology(Beijing)Beijing 100083China State Key Laboratory of Coal Resources and Safe MiningChina University of Mining&Technology(Beijing)Beijing 100083China School of Emergency Management and Safety EngineeringChina University of Mining&Technology(Beijing)Beijing 100083China
出 版 物：《International Journal of Coal Science & Technology》 (国际煤炭科学技术学报（英文）)
年 卷 期：2022年第9卷第6期
页 面：1-12页
核心收录：
学科分类：0820[工学-石油与天然气工程] 081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学]
基 金：the National Natural Science Foundation of China(51727807,52121003) Innovation Teams of Ten-Thousand Talents Program sponsored by the Ministry of Science and Technology of China(2016RA4067)
主 题：Size effect 3D printed model Rocks Mechanical property Fractures Pores
摘 要：Transparent physical models of real rocks fabricated using three-dimensional(3D)printing technology are used in photoelas-tic experiments to quantify the evolution of the internal stress and deformation fields of ***,they are rendered as an emerging powerful technique to quantitatively reveal the intrinsic mechanisms of rock *** mechanical behav-ior of natural rocks exhibits a significant size effect;however,limited research has been conducted on whether transparent physical models observe similar size *** this study,to make the transparent printed models accurately demonstrate the mechanical behavior of natural rocks and reveal the internal mechanism of the size effect in rock mechanical behavior,the size effect in 3D printed models of fractured and porous rocks under uniaxial compressive loading was *** cylindrical models with different sizes that contained different fractured and porous structures were printed using the fracture and porous characteristics extracted from natural coal and *** variation in uniaxial compres-sive strength and elastic modulus of fractured and porous models for increasing model sizes were obtained through uniaxial compression ***,the influence of internal discontinuous structural features,such as fractures and pores,on the size effect pertaining to the mechanical behavior of the model was analyzed and elaborated by comparing it with the mechanical properties of the continuous homogeneous model without fractures and *** findings provided support and reference to analyze the size effect of rock mechanical behavior and the effect of the internal discontinuous structure using 3D printed transparent models.
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