中南大学学报（自然科学版）2025，Vol.56Issue(5)：1969-1980,12.DOI:10.11817/j.issn.1672-7207.2025.05.023
3D打印类岩石试样材料相似度定量评价方法及其脆性特征
Quantitative evaluation methods for material similarity and brittleness characteristics of 3D printed rock-like specimens
摘要
Abstract
3D printing technology has been widely applied in rock mechanics;however,enhancing the similarity between 3D printed materials and natural rock remains challenging.Firstly,similarity between rock-like materials prepared with various printing parameters and natural rock was quantitatively characterized by using the π-value evaluation method and the stress-strain curve evaluation method.Secondly,a brittleness index calculation model was established by considering both the proportion of elastic energy storage in the pre-peak stage and the energy release rate in the post-peak stage.Quantitative analysis of brittleness characteristics for 3D printed rock-like specimens at different printing parameters was conducted.Finally,the optimal combination of printing parameters was determined through comprehensive evaluations of similarity and brittleness indices.The results show that the bulk density,elastic modulus,cohesion,internal friction angle,and uniaxial compressive strength of 3D printed rock-like specimens increase with the increase of curing agent and resin.Specifically,resin content significantly influences bulk density,internal friction angle,and uniaxial compressive strength,whereas curing agent content prominently affects the elastic modulus.Both resin and curing agent substantially affect cohesion.Moderate amounts of resin and curing agent effectively enhance the similarity of 3D printed rock-like specimens to theoretical similar materials,with better results for intermediate parameter and poorer results towards the extremes.When the curing agent and resin contents are 0.26%and 3.0%,respectively,the mechanical parameters and stress-strain behavior of 3D printed rock-like specimens most closely match those of the theoretical similar materials.Additionally,specimens produced with this parameter combination exhibit brittleness characteristics closest to those of natural rocks.关键词
岩石力学/3D打印/相似材料/相似性评价/脆性指数/量纲分析法Key words
rock mechanics/3D printing/similar materials/similarity assessment/brittleness index/dimensional analysis method分类
土木建筑引用本文复制引用
余宸,田威,云伟,贾祎恒..3D打印类岩石试样材料相似度定量评价方法及其脆性特征[J].中南大学学报（自然科学版）,2025,56(5):1969-1980,12.基金项目
中央高校基本科研业务费专项资金资助项目(300102282717) （300102282717）
陕西高校青年创新团队项目([2022]943)(Project(300102282717)supported by the Fundamental Research Funds for the Central Universities （[2022]943）
Project([2022]943)supported by the Youth Innovation Team Program of Shaanxi Universities) （[2022]943）
