Design of Initial Shotcrete Lining for a Mine Shaft Using Two-Dimensional Finite Element Models Considering Excavation Advance Rate

2021 ◽  
Author(s):  
Saeed Naseri ◽  
Navid Bahrani
Keyword(s):  
Finite Element ◽  
Finite Element Models ◽  
Two Dimensional ◽  
Mine Shaft ◽  
Advance Rate ◽  
Dimensional Finite Element ◽  
Shotcrete Lining

Two Dimensional Finite Element Modeling to Identify Physiological Bases for Tactile Gap Discrimination

2005 ◽  
Vol 49 (10) ◽  
pp. 891-895
Author(s):  
Gregory J. Gerling ◽  
Geb W. Thomas
Keyword(s):  
Finite Element ◽  
Solid Mechanics ◽  
Finite Element Models ◽  
Type I ◽  
Gap Detection ◽  
Two Dimensional ◽  
Neural Signals ◽  
Axis Parallel ◽  
Dimensional Finite Element ◽  
Manual Tasks

Tactile edge and gap detection are fundamental to performing manual tasks. Because slowly adapting type I (SA-I) mechanoreceptors encode details pertinent to edge localization, understanding low-level encoding is critical to understanding edge perception. Solid mechanics models may help us understand how mechanoreceptors in the skin encode applied surface indentation into neural signals representing edges. Finite element models test whether an indenter separated by a gap creates unique stress/strain distributions in models based upon orientation to fingerprint lines. Results indicate that a gap axis parallel to ridge lines elicits a more pronounced signal than a gap axis perpendicular to ridge lines. The differences may be due to underlying intermediate ridge microstructure. The percentage differences for three derived stress metrics range from 30-87% greater when the indenter's gap axis parallels the ridges. This initial effort demonstrates that underlying skin microstructure may aid tactile perception of stimulus orientation.

The Influence of Gyri and Sulci on the Skull-Brain Motion Based on Two Two-Dimensional Finite Element Models

2014 ◽  
Vol 934 ◽  
pp. 8-13
Author(s):  
Cong Wang ◽  
Xue Wei Song ◽  
Hao Hu ◽  
Tian Lun Huang
Keyword(s):  
Finite Element ◽  
Load Condition ◽  
Relative Displacement ◽  
Finite Element Models ◽  
Two Dimensional ◽  
Health Issues ◽  
Road Accidents ◽  
Frontal Impacts ◽  
Brain Motion ◽  
Dimensional Finite Element

The relative displacement between the skull and brain can be caused by road accidents and leads to permanent health issues or even death. The objective of this study is to investigate the influence of gyri and sulci on skull-brain motion with two two-dimensional finite element head models with detailed structures. The material properties were adopted from the relative literature and assigned to the different model parts. Firstly, frontal impacts were simulated by impacting the head models with the same box-shaped object respectively to enable a comparison between simulation results and experiment data. Next, the same load condition of Nahum’s experiment reported in the literature was used as input to the finite element models. The results indicate that the influence of gyri and sulci on skull-brain motion is not significant.

Sign in / Sign up

Export Citation Format

Share Document