Abstract
Essential Work of Fracture (EWF) method has been used to evaluate ductile tearing resistance of interstitial-free (IF) steel sheet of 1 mm thickness. Experiments have been done on double edge notched tensile (DENT) specimens with and without fatigue precracking at three different quasi-static ramp rates. The fracture in all cases was flat with maximum specimen necking of 36% of thickness. The estimated crack tip opening angle (CTOA, ψe) was found to be essentially independent of ρ and also of deformation rate. The critical CTOA (φe) was optically estimated using a precracked DENT specimen. Also, the tearing resistance parameters obtained from EWF tests have been compared with that determined using 3-dimentional Finite Element Modeling (FEM). Results of FEM, along with a chosen traction-separation law, were used in a 3-dimentional Cohesive Zone Model (CZM) for flat fracture to simulate crack growth behavior in the DENT specimens.
| Original language | English |
|---|---|
| Pages (from-to) | 29-45 |
| Number of pages | 17 |
| Journal | Engineering Fracture Mechanics |
| Volume | 204 |
| Early online date | 19 Sept 2018 |
| DOIs | |
| Publication status | Published - Dec 2018 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2018 Elsevier Ltd
Funder
Funding Information:The authors thank M/s Tata Steel, India, for providing the test material.
Keywords
- Cohesive zone model
- Crack tip opening angle
- EWF method
- Interstitial free (IF) steel
- Tearing resistance
ASJC Scopus subject areas
- General Materials Science
- Mechanics of Materials
- Mechanical Engineering