基于ct扫描与3d打印技术的岩体三维重构及力学特性初探-岩土力学.pdfVIP

第38 卷第8 期 岩 土 力 学 Vol.38 No.8 2017 年8 月 Rock and Soil Mechanics Aug. 2017 DOI ：10.16285/j.rsm.2017.08.018 基于CT 扫描与3D 打印技术的岩体 三维重构及力学特性初探 田 威，裴志茹，韩 女 （长安大学建筑工程学院，陕西 西安 710061 ） 摘 要：无法直观认识和还原岩石内部结构一直是阻碍岩石力学试验研究的关键问题之一。以天然砂岩为研究对象，运用 CT 扫描和2 种不同的3D 打印工艺重构了与天然砂岩试样结构相接近的3D 打印试样，并在此基础上通过单轴压缩和巴西劈 裂试验对天然砂岩及3D 打印试样进行了力学性能测试，对比了两者的强度和变形规律。试验结果表明：通过不同3D 打印 工艺制作的试样均能够高度还原天然砂岩试样的内部复杂结构。其中，采用 3DP 打印工艺制作的试样具有与天然砂岩试样 更接近的物理力学性能，试验结果的离散性也相对较小。其研究结果可为今后岩石力学研究中材料的替换、室内试验的开展 和数值模拟结果的印证提供新的研究途径。 关 键 词：岩石力学；相似材料；3D 打印；三维重构；力学性能 中图分类号：TU 452 文献标识码：A 文章编号：1000－7598 (2017)08 －2297 －09 A preliminary research on three-dimensional reconstruction and mechanical characteristics of rock mass based on CT scanning and 3D printing technology TIAN Wei, PEI Zhi-ru, HAN Nü (School of Civil Engineering, Chang’an University, Xi’an, Shaanxi 710061, China) Abstract: Reconstructing the inner structure of rocks has been one of the critical problems in the field of experimental rock mechanics. In this paper, natural sandstone specimens were selected as research objects, and CT scanning and two different kinds of three-dimensional (3D) printing methods were adopted to reconstruct 3D-printed specimens. It turns out that the structures of 3D-printed specimens were in proximity to natural sandstone specimens. Uniaxial compression tests and Brazilian tests were carried out on these two kinds of specimens to obtain mechanical properties. Then the strength and deformation law of natural sandstone specimens and two kinds o