Study on fracture behavior of molars based on three‐dimensional high‐precision computerized tomography scanning and numerical simulation

2021 ◽  
Author(s):  
Xianhui Feng ◽  
Wen Kou ◽  
Hongyuan Liu ◽  
Bin Gong ◽  
Chun'an Tang
Keyword(s):  
Numerical Simulation ◽  
Computerized Tomography ◽  
High Precision ◽  
Fracture Behavior ◽  
Three Dimensional ◽  
Tomography Scanning

Measurement Method of X-ray Focus Projection Coordinates of Three-Dimensional Micro-Computerized Tomography Scanning System

2009 ◽  
Vol 29 (5) ◽  
pp. 1275-1280
Author(s):  
杨民 Yang Min ◽  
刘静华 Liu Jinghua ◽  
李保磊 Li Baolei ◽  
吴文晋 Wu Wenjin ◽  
王钢 Wang Gang
Keyword(s):  
Computerized Tomography ◽  
Measurement Method ◽  
Three Dimensional ◽  
Scanning System ◽  
X Ray ◽  
Tomography Scanning ◽  
Focus Projection

Numerical Simulation of Stress Corrosion Cracking in a Pipe Using S-Version FEM

2010 ◽  
Vol 452-453 ◽  
pp. 577-580
Author(s):  
Masanori Kikuchi ◽  
Yoshitaka Wada ◽  
Yuto Shimizu ◽  
Yu Long Li
Keyword(s):  
Numerical Simulation ◽  
Residual Stress ◽  
Crack Growth ◽  
Fracture Behavior ◽  
Three Dimensional ◽  
Stress Fields ◽  
Crack Growth Behavior ◽  
Stress Distributions ◽  
Residual Stress Field ◽  
Energy Agency

Fracture in heat affected zone (HAZ) in welding has been a serious problem for the integrity of machines. Prediction of fracture behavior due to the residual stress field in HAZ is important. In this paper, S-Version FEM(S-FEM) is applied to simulate the crack growth under thermal and residual stress fields. For evaluation of stress intensity factor, virtual crack closure integral method (VCCM) is employed. The residual stress data was provided by JAEA, Japan Atomic Energy Agency, based on their numerical simulation. SCC crack growth of a surface crack at inner suface of a pipe under thermal residual stress is simulated in three-dimensional filed. Distributions of residual stress is not axi-symmetric along pipe wall, and it affects the crack growth behavior. Ttwo cases, for axi-symmetric and non-symmetric thermal stress distributions, are assumed and crack growth behaviors are obtaiend and discussed.

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