Prediction of six or eight ears in a drawn cup based on a new anisotropic yield function
By Jeong Whan Yoon, Frederic Barlat, R. Dick, M. Karabin. 2006
341 citations recorded by the source corpus.
Abstract In this work, the recently proposed anisotropic yield function, Yld2004-18p [Barlat, F., Aretz, H., Yoon, J.W., Karabin, M.E., Brem, J.C., Dick, R.E., 2005. Linear transformation based anisotropic yield function, Int. J. Plasticity 21, 1009], is implemented in a finite element (FE) code for application to the cup drawing simulation of a circular blank sheet. A short review of the Yld2004-18p relevant features is provided and the stress integration scheme for its implementation in FE codes is described. The simulation of the drawing process is conducted for an aluminum alloy sheet sample (AA2090-T3). The predicted and experimental cup height profiles (earing profiles) with six ears are shown to be in excellent agreement. Additional simulations on a ficticious material are performed in order to show that the yield function Yld2004-18p can lead to the prediction of cups with eight ears. In order to achieve these results, a sufficient number of input data are required to calculate the yield function coefficients. Finally, a simplified analytical approach that relates the earing profile to the r -value directionality is also presented in this paper. It is shown that this approach can be very useful as a first approximation of the earing profile of drawn cups.
Subfields: Materials Chemistry, Mechanical Engineering, Mechanics of Materials
View Paper: https://www.semanticscholar.org/paper/4b151fdee514a08910ffc6f7b1ba8a9e4a2bc239
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Citations in the corpus
- A virtual laboratory using high resolution crystal plasticity simulations to determine the initial yield surface for sheet metal forming operations (2016, background): “Advanced yield functions (Karafillis and Boyce, 1993; Barlat et al., 1997, 2005; Yoon et al., 2006, 2014) generally use both, uniaxial tensile yield stresses and r-values, simultaneously as an input and, therefore, usually show good predictions of the rvalues and the normalized yield stresses.”
- Advances in anisotropy and formability (2010, neutral): “[303–305]; Plunkett et al.”
- An alternative to kinematic hardening in classical plasticity (2011, neutral): “These functions have been employed successfully in a number of examples where loading is nearly proportional (for instance, Yoon et al., 2004, 2006).”