Learning Outcomes for this Section

After completing this section, you should be able to:

• provide a definition of the yield locus
• explain why yield locus is important
• explain the influence of the anisotropy in sheet metal forming
• know the experimental methods used to determine the yield locus
• know the advantages and limits of the different yield criteria
• used in the theoretical models the most appropriate yield criterion
• analyse the sheet metal forming processes

Pre-requisites

Before starting, it is important that you are familiar with the following terms: % elongation to failure; rolling; strain; stress; yield stress; Youngs Modulus; elastic deformation; plastic deformation; Hooke's law; ductility; formability; proof stress; plastic strain; flow curves; stress-strain diagrams; BCC; crystal system; elastic strain; FCC; forming; hardening; hoop stress; isotropic; shear; shear stress; work-hardening; shear modulus;

Recommended Reading

• "Formability of Metallic Materials", Banabic D, Bunge H-J, Pöhlandt K, Tekkaya AE, Springer, 3540679065
• "Continuum Scale Simulation of Engineering Materials", Barlat F, Cazacu O, Zyczkowski M, Banabic D and Yoon JW, Wiley-VCH, 3527307605