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Measurement of the strength differential effect of DP980 steel sheet and experimental validation using pure bending test
- Source :
- Journal of Materials Processing Technology. 256:247-253
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- The strength differential effect (SDE), i.e., the difference between the flow stress of uniaxial tension and compression, of a dual-phase steel sheet with a tensile strength of 980 MPa (DP980) was measured using an in-plane uniaxial tension–compression test apparatus for sheet metals. The SDE data were obtained for a logarithmic total strain range of 0 ≤ | e | ≤ 0.086 in both the rolling (RD) and transverse (TD) directions of the test material. It was observed that the magnitude of the compressive flow stress, σ C , was consistently higher than that of the tensile flow stress, σ T , for a strain range of | e | > 0.009 in both the RD and TD; the amount of SDE, defined as σ C − σ T / σ T × 100 (%), at | e | = 0.086 was 5.2% in the RD and 6.2% in the TD. Moreover, in order to validate the SDE, a novel test apparatus for obtaining the pure bending moment M versus curvature κ (i.e., M − κ ) diagram was designed and manufactured. The obtained M − κ curves were consistent with those based on the elastoplastic numerical analysis considering the SDE. Thus, the SDE of the test material is experimentally validated using the pure bending test.
- Subjects :
- 0209 industrial biotechnology
Materials science
Numerical analysis
Diagram
Metals and Alloys
02 engineering and technology
Flow stress
021001 nanoscience & nanotechnology
Curvature
Compression (physics)
Industrial and Manufacturing Engineering
Computer Science Applications
Transverse plane
020901 industrial engineering & automation
Modeling and Simulation
Ultimate tensile strength
Pure bending
Ceramics and Composites
Composite material
0210 nano-technology
Subjects
Details
- ISSN :
- 09240136
- Volume :
- 256
- Database :
- OpenAIRE
- Journal :
- Journal of Materials Processing Technology
- Accession number :
- edsair.doi...........60808ff301b5fff345c64179fe915a8b