首页|Method of fabricating artificial rock specimens based on extrusion free forming(EFF)3D printing

Method of fabricating artificial rock specimens based on extrusion free forming(EFF)3D printing

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Three-dimensional(3D)printing technology has been widely used to create artificial rock samples in rock mechanics.While 3D printing can create complex fractures,the material still lacks sufficient sim-ilarity to natural rock.Extrusion free forming(EFF)is a 3D printing technique that uses clay as the printing material and cures the specimens through high-temperature sintering.In this study,we attempted to use the EFF technology to fabricate artificial rock specimens.The results show the physico-mechanical properties of the specimens are significantly affected by the sintering temperature,while the nozzle diameter and layer thickness also have a certain impact.The specimens are primarily composed of SiO2,with mineral compositions similar to that of natural rocks.The density,uniaxial compressive strength(UCS),elastic modulus,and tensile strength of the printed specimens fall in the range of 1.65-2.54 g/cm3,16.46-50.49 MPa,2.17-13.35 GPa,and 0.82-17.18 MPa,respectively.It is capable of simulating different types of rocks,especially mudstone,sandstone,limestone,and gneiss.However,the simulation of hard rocks with UCS exceeding 50 MPa still requires validation.

Artificial rock3D printingExtrusion free forming(EFF)Similarity analysisMechanical properties

Xiaomeng Shi、Tingbang Deng、Sen Lin、Chunjiang Zou、Baoguo Liu

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Key Laboratory for Urban Underground Engineering of the Ministry of Education,Beijing Jiaotong University,Beijing,100044,China

School of Civil Engineering,Beijing Jiaotong University,Beijing,100044,China

Department of Civil Engineering,Monash University,Melbourne,3800,Australia

Beijing Natural science Foundation for Young ScientistsTalent Fund of Beijing Jiaotong UniversityState Key Laboratory for GeoMechanics and Deep Underground Engineering,China University of Mining and Technology

82140522021RC226SKLGDUEK2115

2024

10.1016/j.jrmge.2023.05.011

岩石力学与岩土工程学报(英文版)
中国科学院武汉岩土力学所中国岩石力学与工程学会武汉大学

岩石力学与岩土工程学报(英文版)

CSTPCD
影响因子：0.404
ISSN：1674-7755
年,卷(期)：2024.16(4)
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