Results 61 to 70 of about 1,265 (180)

Comparison of Mesoscale Crack Advance and Process Zone Element Approaches for Simulating Ductile Crack Trajectories in Steel

Fatigue &Fracture of Engineering Materials &Structures, Volume 49, Issue 11, Page 4850-4862, November 2026.
ABSTRACT Rigorous application of continuum damage mechanics (CDM) models coupled with crack propagation schemes can predict crack branching or zigzag trajectories near the crack tip, even when the macroscopic crack growth is straight. This arises from oscillations in the local damage field and is consistent with experimental observations of ductile ...
Andrew Ziccarelli, Amit Kanvinde, Gregory Deierlein   +2 more
wiley   +1 more source

A generalized nonlinear three-dimensional Hoek‒Brown failure criterion

Journal of Rock Mechanics and Geotechnical Engineering
To understand the strengths of rocks under complex stress states, a generalized nonlinear three-dimensional (3D) Hoek‒Brown failure (NGHB) criterion was proposed in this study.
Jiaxin Wang, Shunchuan Wu, Haiyong Cheng, Junlong Sun, Xiaolong Wang, Yaxi Shen   +5 more
doaj   +1 more source

Energy evolution and damage analysis of true triaxial cyclic loading and unloading of sandstone at different rates

Meitan xuebao
To investigate the effects of different rates on the energy and damage evolution of sandstone during true triaxial cyclic loading and unloading damage, the true triaxial compression test, true triaxial primary loading and unloading test, and true ...
Qihang ZHANG, Xiangrui MENG, Guangming ZHAO, Wensong XU, Chongyan LIU, Zhixi LIU, Xukun WU, Minjie QI   +7 more
doaj   +1 more source

Breakage behavior of sand under true triaxial stress based on discrete element method

Yantu gongcheng xuebao, 2017
A series of triaxial compression tests and true triaxial tests based on discrete element method are conducted numerically to investigate the particle breakage behavior of granular materials under triaxial stress conditions.
ZHOU Lun-lun , CHU Xi-hua , XU Yuan-jie
doaj   +1 more source

Deformation, fracture characteristics and damage constitutive model of soft coal under true triaxial complex stress paths.

PLoS ONE
Understanding the mechanical properties and damage deterioration mechanisms of soft coal under true triaxial complex stress paths is crucial for predicting and evaluating the stability of the roof during roadway excavation in thick soft coal seams.
Chongyang Jiang, Lianguo Wang, Jiaxing Guo, Shuai Wang   +3 more
doaj   +1 more source

Strength of artificially frozen sand with low confining pressure under a three-dimensional stress path

Scientific Reports
True triaxial tests were conducted on artificially frozen sand. The effects of the intermediate principal stress coefficient, temperature and confining pressure on the strength of frozen sand were studied. The stress–strain curves under different initial
Zhaoming Yao, Xinjie Xu, Shuang Liu
doaj   +1 more source

Effect of Fissure Penetration Degrees on Spalling Process and Feature of Surrounding Rock in Rectangular Tunnel Under True Triaxial Loading

Applied Sciences
To investigate the effect of fissure penetration on the spalling process and features of rectangular tunnel sidewalls, true triaxial compression tests were conducted on cubic sandstone specimens with varying fissure penetration degrees. Acoustic emission
Jie Zhang, Kang Peng, Kun Luo, Song Luo, Mao Jing   +4 more
doaj   +1 more source

Mechanical behavior and improved hypoplastic constitutive model for saturated frozen sand

Research in Cold and Arid Regions
The artificial ground-freezing method is the main technical means for the excavation of mines and tunnels through the water-rich sand layer, and the comprehensive understanding of the mechanical properties of frozen saturated sand and the stress-strain ...
ZhaoMing Yao, XiangBin Fu, Nan Li
doaj   +1 more source

Thermo-mechanical analysis of wellbore stability in ultra-deep formations

Journal of Rock Mechanics and Geotechnical Engineering
Wellbore stability is crucial for ultra-deep wells operating under high temperature and high stress conditions. To analyze the effects of thermal shock and horizontal stress on wellbore stability, a series of true triaxial compression experiments and ...
Yang Yang, Qian Wang, Fujian Yang, Dawei Hu, Yunhu Lu, Hui Zhou   +5 more
doaj   +1 more source

Stress transfer law in laboratory hydraulic fracturing experiments

Scientific Reports
During the true triaxial hydraulic fracturing experiments, the compression stress applied to the specimen surface cannot be transferred to the interior immediately, resulting in inconsistency with in-situ stress conditions.
Renyi Qiu, Guangqing Zhang, Xuelin Zheng, Senlin Luo, Houze Chen, Jianlin Zhao   +5 more
doaj   +1 more source