EXACT - the ESAFORM Benchmark 2021

EXACT Experiment and Analysis of Aluminum Cup Drawing Test The ESFORM Benchmark promotes the constitution of a network to deeply analyze a challenge present in the community of material forming processes. The earing predictions formed during the cup drawing process is an old problem (Fig.1). However here, for the first time, the organizers (see Table 1), eight well-known scientists of the ESAFORM community decide to investigate together with all the benchmark participants (Table 2) their practice in both experimental and numerical fields. The discussions and results of this work will be presented at the ESAFORM 2021 conference and gathered later within an article in the International Journal of Material Forming. The participants and the organizers together will point the impact of different choices on the results. Fig.1 Technical challenge: earing prediction for an anisotropic material Most sheet forming benchmarks include information such as: the hardening law parameters, based on limited experimental data (generally, r-values, yield stresses and ultimate strengths for 3 loading directions) extracted from uniaxial tension tests the coefficients for certain yield functions, available in the material libraries of most commercial software. The features of the ESAFORM 2021 Benchmark are : identification of constitutive models performed by participants; information concerning the experimental scatter, the “raw” data, where 3 laboratories have collaborated to duplicate some ty