| 연속체 손상역학을 이용한 수치 피로시험 기법 |
|
, , , |
| |
| Numerical Fatigue Test Method Based on Continuum Damage Mechanics |
|
Chi-Seung Lee, Young-Hwan Kim, Tae-Woo Kim, Jae-Myung Lee |
|
|
| Abstract |
|
Once asesment of material failure characteristics is captured precisely in a unified way, it can be directly incorporated into the structural failure asesment under various loading environments, based on the theoretical backgrounds so called Local Aproach to Fracture. The aim of this study is to develop a numerical fatigue test method by continuum damage mechanics aplicable for the asesment of structural integrity throughout crack initiation and structural failure based on the Local Aproach to Fracture. The generalized elasto-visco-plastic constitutive equation, which can consider the internal damage evolution behavior, is developed and employed in the 3-D FEA code in order to numerically evaluate the material and/or structural responses. Explicit information of the relationships between the mechanical properties and material constants, which are required for the mechanical constitutive and damage evolution equations for each material, are implemented in numerical fatigue test method. The material constants selected from constitutive equations are used directly in the failure asesment of material and/or structures. The performance of the developed system has been evaluated with asesing the S-N diagram of stainles steel materials. |
| Key Words:
Continuum damage mechanics, Local aproach to fracture, Finite element analysis, Fatigue |
|
PDF Links
Full text via DOI
Download Citation
