کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
278138 | 1430268 | 2012 | 10 صفحه PDF | دانلود رایگان |
Sheet specimens of aluminum alloy 5754 were deformed along a series of bi-linear, equal-biaxial and uniaxial, strain paths while simultaneously measuring stress–strain behavior. The Visco-Plastic Self-Consistent crystal plasticity model, which incorporates texture evolution, was used to simulate the flow stress and hardening behavior based in part on the measured crystallographic texture before deformation. The predicted crystallographic texture qualitatively captures the texture measured in the experiments. Including latent hardening of multiple slip planes allowed the model to explain the decrease in flow stress when changing from equal-biaxial to uniaxial deformation. However, the model captures neither the details of the drop in flow stress nor the magnitude of the plastic hardening after the change in deformation mode. This is likely due to room temperature recovery between the two segments of testing.
► AA5754 response to combined equal-biaxial and uniaxial tensile strains is measured.
► Visco-Plastic Self-Consistent crystal plasticity simulation of texture and stress–strain.
► Crystallographic texture predictions qualitatively matched the measured texture.
► Latent hardening of slip planes was required to capture the stress–strain response.
Journal: International Journal of Solids and Structures - Volume 49, Issue 25, 1 December 2012, Pages 3507–3516