大连理工大学学报2025，Vol.65Issue(2)：181-190,10.DOI:10.7511/dllgxb202502009
基于相场法的三维巴西圆盘破裂行为研究
Study of fracture behavior in three-dimensional Brazilian disk based on phase field method
摘要
Abstract
The rock crack initiation-propagation-coalescence process is crucial for the safety and stability of rock mass engineering.To analyze the fracture behavior of rock,a mixed phase-field model is established based on the Griffith brittle fracture theory and the variational principle.The force transmission between specimen and loading plate in the uniaxial compression experiment is characterized using the contact method.The influence of prefabricated crack inclination angle on the fracture behavior of Brazilian disk is studied.The study finds that the fracture behaviors on the surface and within the specimen are not synchronized.The crack initiation location along the thickness direction of the disk shifts from the two sides to the middle with the increase of prefabricated crack inclination angle.The crack propagation velocity and the crack volume are significantly influenced by prefabricated crack inclination angle.The study results indicate that the three-dimensional model offers a more comprehensive depiction of crack initiation-propagation-coalescence process in comparison to the two-dimensional model.关键词
巴西圆盘/破裂行为/分形维数Key words
Brazilian disk/fracture behavior/fractal dimension分类
土木建筑引用本文复制引用
刘先珊,郝梓宇,刘少炜,张普纲,潘玉华..基于相场法的三维巴西圆盘破裂行为研究[J].大连理工大学学报,2025,65(2):181-190,10.基金项目
国家自然科学基金资助项目(52279094) （52279094）
重庆市自然科学基金资助项目(CSTB2023NSCQ-MSX0069) （CSTB2023NSCQ-MSX0069）
重庆市研究生科研创新项目(CYS23112). （CYS23112）
