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Full-Text Articles in Civil and Environmental Engineering
Mechanical Properties Of Sand 3d Printed Rock-Like Samples Based On Different Post-Processing Methods, Wei Tian, Xiao-Hui Wang, Wei Yun, Xu Cheng
Mechanical Properties Of Sand 3d Printed Rock-Like Samples Based On Different Post-Processing Methods, Wei Tian, Xiao-Hui Wang, Wei Yun, Xu Cheng
Rock and Soil Mechanics
3D printing, a rapid prototyping technology, has great potential for applications in laboratory rock tests, but the low strength and stiffness of 3D printed samples have been one of the key problems that need to be addressed. In order to find a way to enhance the strength and stiffness of 3D printed rock-like samples, GS19 sand and furan resin were selected as printing materials, and sand 3D printed rock-like samples were used as research objects. Based on this, the samples were post-processed using three different methods: vacuum infiltration, low-temperature treatment, and combination of infiltration and low-temperature. Uniaxial compression tests were …
Fracturing Mechanism Of Rock-Like Specimens With Different Joint Densities Based On Dic Technology, Fei-Fei Qi, Ke Zhang, Jian-Bin Xie
Fracturing Mechanism Of Rock-Like Specimens With Different Joint Densities Based On Dic Technology, Fei-Fei Qi, Ke Zhang, Jian-Bin Xie
Rock and Soil Mechanics
In order to study the influence of joint density on the strength characteristics and failure modes of rock mass, the rock-like specimens with different joint densities were prepared by using 3D sand printing, with the quartz sand and furan resin being employed as the printing materials. The uniaxial compression test was performed on the 3D sand printed specimens, and the digital image correlation (DIC) method was used as a non-contact technique to monitor the full-field deformation. The crack initiation, propagation and coalescence behaviors were quantitatively analyzed from the micromechanics point of view. The results show that the shape of stress-strain …
Study On The Fracture Mechanism Of 3d-Printed-Joint Specimens Based On Dic Technology, Ai-Bing Jin, Shu-Liang Wang, Ben-Xin Wang, Hao Sun, Yi-Qing Zhao
Study On The Fracture Mechanism Of 3d-Printed-Joint Specimens Based On Dic Technology, Ai-Bing Jin, Shu-Liang Wang, Ben-Xin Wang, Hao Sun, Yi-Qing Zhao
Rock and Soil Mechanics
In order to accurately characterize the deformation and failure modes of prefabricated jointed rocks with different angles under uniaxial compression, a joint model based on 3D printing technology was used to simulate the structural surface in the rock mass. Rock specimens with precast joints with different angles were obtained by pouring cement mortar, and a uniaxial compression test was performed. At the same time, digital image correlation (DIC) technology was used to observe and analyze the process of crack formation, propagation, and penetration in the test specimen. The results showed that as the angle of prefabricated joints increased from 0° …
Deformation And Fracturing Characteristics Of Fracture Network Model And Influence Of Filling Based On 3d Printing And Dic Technologies, Ke Zhang, Fei-Fei Qi, Yu-Long Chen
Deformation And Fracturing Characteristics Of Fracture Network Model And Influence Of Filling Based On 3d Printing And Dic Technologies, Ke Zhang, Fei-Fei Qi, Yu-Long Chen
Rock and Soil Mechanics
Due to the complexity of fracture distribution in engineering rock mass, the physical modeling of fracture network is one of the key problems in rock mechanics experiments. In this study, a 3D printing method of fracture network model based on water-soluble materials with polyactic acid materials as supporting base is proposed. Based on the water solubility of printing material, a method for preparing rock-like model specimens containing fracture network is established. Through digital image correlation (DIC) method, the deformation and fracturing characteristics of rock-like model specimens during loading process are quantitatively studied, and the influence law of filling material is …
Research On Direct Shear Behaviour And Fracture Patterns Of 3d-Printed Complex Jointed Rock Models, Pei-Tao Wang, Zheng-Jun Huang, Fen-Hua Ren, Liang Zhang, Mei-Feng Cai
Research On Direct Shear Behaviour And Fracture Patterns Of 3d-Printed Complex Jointed Rock Models, Pei-Tao Wang, Zheng-Jun Huang, Fen-Hua Ren, Liang Zhang, Mei-Feng Cai
Rock and Soil Mechanics
Geometry and mechanical characteristics of joints are key factors affecting the shear behaviors and fracture patterns of jointed rock mass. Using 3D printing technique, experimental jointed rock specimens containing rough joints with varied joint roughness coefficient (JRC), different types of geometrical joints, and fractrues network were established respectively. Then direct shear tests were conducted on the jointed rock models to study the shear strength and failure patterns. The results show that the values of shear strength of jointed rock models fluctuate greatly with varied JRC curves. The peak shear displacement decreases with increasing amplitude of fluctuation. The lowest and highest …