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Numerical determination of parameterised failure curves for ductile structural materials

  • Ulrich Weber , Ashok Mohanta and Siegfried Schmauder
Published/Copyright: May 23, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 98 Issue 11

Abstract

Inhomogeneities such as voids or inclusions can lead to stress and strain concentrations under external loading conditions due to the different elastic – plastic and thermal properties of the phases. To describe the damage behavior of ductile materials, a damage parameter was introduced by Rice and Tracey and so-called failure curves (determined by experiments) describe different possible stress – strain states at fracture. The experimental effort can be reduced by applying unit cell models consisting of a single void in the base material with a pre-defined void volume fraction f0. With these models, stress triaxialities and plastic strains are calculated and failure curves are derived. Parameter studies are performed to obtain analytical equations for the material dependent constants A and B as a function of the initial void volume fraction f0 and the hardening exponent N as well as the yield stress 0.

Keywords: FEM; Unit cell model; Damage parameter; Failure curves
* Correspondence address, Dr.-Ing. Ulrich Weber, Institut für Materialprüfung, Werkstoffkunde und Festigkeitslehre (IMWF), Universität Stuttgart, Pfaffenwaldring 32, D-70569 Stuttgart, Germany, Tel.: +49 711 685 63055, Fax: +49 711 685 62635E-mail:

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Received: 2007-4-17
Accepted: 2007-8-2
Published Online: 2013-05-23
Published in Print: 2007-11-01

© 2007, Carl Hanser Verlag, München

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  2. Contents
  3. Editorial
  4. Professor Dr. phil. Dr. techn. e. h. Hellmut F. Fischmeister
  5. Basic
  6. Compressive deformation of lamellar microstructures – a short review
  7. Influence of external and internal length scale on the flow stress of copper
  8. Spinodal decomposition of cubic Ti1−xAlxN: Comparison between experiments and modeling
  9. Combined ab-initio and N-K, Ti-L2,3, V-L2,3 electron energy-loss near edge structure studies for TiN and VN films
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  11. Numerical determination of parameterised failure curves for ductile structural materials
  12. Relaxation of semiconductor nanostructures using molecular dynamics with analytic bond order potentials*
  13. Examination of phase transformations in the system Fe–N–C by means of nitrocarburising reactions and secondary annealing experiments; the α + ∊ two-phase equilibrium
  14. Applied
  15. On the evolution of secondary hardening carbides in a high-speed steel characterised by APFIM and SANS
  16. Silicon nitride tools for hot rolling of high-alloyed steel and superalloy wires – load analysis and first practical tests
  17. Development of the unloading stiffness during cyclic plastic deformation of a high-strength aluminium alloy in different tempers
  18. Enhanced thermal stability of a cobalt–boron carbide nanocomposite by ion-implantation
  19. Experimental studies and thermodynamic simulation of phase transformations in high Nb containing γ-TiAl based alloys
  20. Kinetics of nanoscale structure development during Mg-vapour reduction of tantalum oxide
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  22. Adhesive contact between flat punches with finite edge radius and an elastic half-space
  23. Notifications
  24. DGM News
https://doi.org/10.3139/146.101573
Keywords for this article
FEM; Unit cell model; Damage parameter; Failure curves

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Professor Dr. phil. Dr. techn. e. h. Hellmut F. Fischmeister
  5. Basic
  6. Compressive deformation of lamellar microstructures – a short review
  7. Influence of external and internal length scale on the flow stress of copper
  8. Spinodal decomposition of cubic Ti1−xAlxN: Comparison between experiments and modeling
  9. Combined ab-initio and N-K, Ti-L2,3, V-L2,3 electron energy-loss near edge structure studies for TiN and VN films
  10. Gold-enhanced oxidation of silicon nanowires
  11. Numerical determination of parameterised failure curves for ductile structural materials
  12. Relaxation of semiconductor nanostructures using molecular dynamics with analytic bond order potentials*
  13. Examination of phase transformations in the system Fe–N–C by means of nitrocarburising reactions and secondary annealing experiments; the α + ∊ two-phase equilibrium
  14. Applied
  15. On the evolution of secondary hardening carbides in a high-speed steel characterised by APFIM and SANS
  16. Silicon nitride tools for hot rolling of high-alloyed steel and superalloy wires – load analysis and first practical tests
  17. Development of the unloading stiffness during cyclic plastic deformation of a high-strength aluminium alloy in different tempers
  18. Enhanced thermal stability of a cobalt–boron carbide nanocomposite by ion-implantation
  19. Experimental studies and thermodynamic simulation of phase transformations in high Nb containing γ-TiAl based alloys
  20. Kinetics of nanoscale structure development during Mg-vapour reduction of tantalum oxide
  21. On the interaction of ductile damage and materials softening of a Ni-base alloy during hot deformation
  22. Adhesive contact between flat punches with finite edge radius and an elastic half-space
  23. Notifications
  24. DGM News
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