کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1574425 1514712 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A modified Johnson–Cook model for tensile flow behaviors of 7050-T7451 aluminum alloy at high strain rates
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
A modified Johnson–Cook model for tensile flow behaviors of 7050-T7451 aluminum alloy at high strain rates
چکیده انگلیسی

The uniaxial quasi-static and dynamic tensile tests were conducted at different strain rates (10–3 s−1, 800 s−1, 1900 s−1 and 2900 s−1) for 7050-T7451 aluminum alloy. Then, research of the strain rate hardening coefficient in the original Johnson–Cook model at different strains and strain rates showed that the coefficient is a function of strain and strain rate from the tensile experimental results. Furthermore, a modified Johnson–Cook model was proposed to describe the flow behaviors of the studied alloy based on the correction to the strain rate hardening coefficient. Comparisons between the experimental data and predicted results using the original JC model, Khan–Liu (KL) model and the modified JC model showed that a better agreement can be obtained applying the modified model than the other two models. Verifications for predicting three new high strain rates (1500 s−1, 2500 s−1 and 3500 s−1) experimental data demonstrated the modified JC model can provide an accurate description for the dynamic behaviors of the studied alloy.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 631, 17 April 2015, Pages 214–219
نویسندگان
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