Evaluation of ductile tearing resistance of an interstitial free steel sheet using SENT specimens
| Autor: | Rudra P. Sarkar, A.D. Bhowmick, P.S. De, S.K. Chandra, Pravash Chandra Chakraborti, S.K. Ray |
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| Rok vydání: | 2020 |
| Předmět: |
Ductile tearing
Materials science Mechanical Engineering 0211 other engineering and technologies Crack tip opening displacement 02 engineering and technology Edge (geometry) Critical value 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials Ultimate tensile strength Crack initiation Fracture (geology) General Materials Science Composite material Quasistatic process 021101 geological & geomatics engineering |
| Zdroj: | Engineering Fracture Mechanics. 238:107257 |
| ISSN: | 0013-7944 |
| DOI: | 10.1016/j.engfracmech.2020.107257 |
| Popis: | Ductile tearing resistance of a 1 mm thick interstitial free steel sheet has been characterized using single edge notched tensile (SENT) specimens with or without fatigue precracks at quasistatic strain rates. In this study, the critical Crack Tip Opening Angle (CTOA), and also crack initiation parameters, namely the initiation energy per unit ligament area ( w i ), critical value for the J -integral ( J c ), and critical crack tip opening displacement ( δ c ) have been examined and compared with the corresponding parameters from the Essential Work of Fracture (EWF) method. Dependence of these parameters on specimen geometry has also been examined. The EWF paradigm has been extended to the initial mixed-constraint regime of crack extension. 3D cohesive zone modelling for flat fracture becomes reasonably successful in simulating crack growth in the SENT specimens. |
| Databáze: | OpenAIRE |
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