Finite element method applied in mine pressure computation within the context of rock massif – support system interaction

Results of analytical, laboratory and mine studies of parameters of disintegration zones in structurally-heterogeneous rocks and fracture systems around of the deep mine roadways are presented. A mathematical model is proposed, which is realized with the help of the procedures of simulation modeling by finite element method. Based on the calculation of possible directions of the rock shearing (the “rock shear sites”) and breakage of bonds between the elements, the model allows determining orientation of dominant master fracture system development with taking into account natural structural defects in the rock massif. A new algorithm was created for determining master cracks and boundaries of disintegration zones with the layered rock, which differs by determining directions of rock shear sites in the elastoplastic problem considering residual strength and main structural defects of the structurally-heterogeneous rock massif. Regularities of organization of unidirectional rock shear sites and their distribution under the influence of mining operations in zones with inelastic deformations were established.

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Optimization and Application of Bearing Support for Output Shaft of C-EPS

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.354-355.1187 ◽

2011 ◽

Vol 354-355 ◽

pp. 1187-1191

Author(s):

Zhi Gang Chen ◽

Wei Fu ◽

Ting Ming Zhou ◽

Meng Qi Li ◽

Zhi Hui Liu ◽

...

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Theoretical Calculation ◽

Support System ◽

Calculation Model ◽

Output Shaft ◽

Load Calculation ◽

Calculation Results ◽

Strength And Stiffness ◽

Element Method

In order to obtain the optimal situation of the output shaft load in different bearing support system, this paper has established output shaft load calculation model in one bearing, double bearings and three bearings support system to compare the calculation results. Use equivalent output shaft to do theoretical calculation and use finite element method to calculate the strength and stiffness of the uniform output shaft for comparison among three types of support. The results shows that stress value of output shaft with theoretical calculation is closed to the value with finite element method, but reverse as the deformation of output shaft, and the optimization values are less than 1% with three supporting bearings.

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Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽

10.1039/c9nr06508c ◽

2019 ◽

Vol 11 (43) ◽

pp. 20868-20875 ◽

Cited By ~ 1

Author(s):

Junxiong Guo ◽

Yu Liu ◽

Yuan Lin ◽

Yu Tian ◽

Jinxing Zhang ◽

...

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Interfacial Effect ◽

Infrared Photodetector ◽

The Finite Element Method ◽

Ferroelectric Domains ◽

Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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