ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In this paper, the effect of strain rate has been considered in the simulation of formingprocess with a simple form combined into the material law. Quite a few researchers have proposedvarious hardening laws and strain rate functions to describe the material tensile curve. In this study,the strain rate model Cowper-Symonds is used with anisotropic elasto-plastic material law in thesimulation process. The strain path evolution of certain elements, when the strain rate is consideredand not, is compared. Two sheet materials, Cold-reduced Carbon Steel (SPCC) JIS G3141 andAluminum alloy 6112 are used in this study. Two yield criteria, Hill 48 and Hill 90, are appliedrespectively to improve the accuracy of simulation result. They show different performance whenstrain rate effect is considered. Strain path of the elements in the fracture risk area of SPCC (JISG3141) varies much when the strain rate material law is used. There is only little difference of thestrain distribution of Al 6112 when the strain rate effect is included and excluded in the materiallaw. The simulation results of material SPCC under two conditions indicate that the strain rateshould be considered if the material is the rate-sensitive material, which provides more accuratesimulation results
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.532-533.973.pdf
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