Abstract
The plastic influence functions for calculating fully plastic Crack opening displacement (COD) of complex-cracked pipes were newly proposed based on systematic 3-dimentional (3-D) elastic-plastic Finite element (FE) analyses using Ramberg-Osgood (R-O) relation, where global bending moment, axial tension and internal pressure are considered separately as a loading condition. Then, crack opening analyses were performed based on GE/EPRI concept by using the new plastic influence functions for complex-cracked pipes made of SA376 TP304 stainless steel, and the predicted CODs were compared with FE results based on deformation plasticity theory of tensile material behavior. From the comparison, the confidence of the proposed fully plastic crack opening solutions for complex-cracked pipes was gained. Therefore, the proposed engineering scheme for COD estimation using the new plastic influence functions can be utilized to estimate leak rate of a complex-cracked pipe for R-O material.
| Original language | English |
|---|---|
| Pages (from-to) | 1563-1572 |
| Number of pages | 10 |
| Journal | Journal of Mechanical Science and Technology |
| Volume | 30 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2016 Apr 1 |
Keywords
- Complex crack
- Crack opening displacement
- Finite element analysis
- GE/EPRI method
- Plastic influence functions
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering