PT Journal
AU Stachowicz, F
TI Instantaneous Plastic Flow Properties of Thin Brass Sheets Under Uniaxial and Biaxial Testing
SO Acta Mechanica Slovaca
PY 2011
BP 22
EP 27
VL 15
IS 1
DI 10.21496/ams.2011.003
DE Plastic Anisotropy; Strain Hardening; Strain State; Forming Limit; Sheet Metal
AB In the prediction of formability of sheet metals, it is necessary to determine material properties which are normally evaluated on the data obtained by performing simple tests. The most important parameters affecting the value of limit strains of a sheet metal are the strain hardening exponent (n) and plastic anisotropy ratio (r). It was established that especially the value of n-parameter of brass sheets strongly depend on the specimen elongation and stress/strain state. The effect of instantaneous (differential) nt - value and rt - value on the forming limit curve was computed theoretically.
ER