07 خرداد 1403
سجاد رسائي

سجاد رسائی

مرتبه علمی: استادیار
نشانی:
تحصیلات: دکترای تخصصی / مکانیک
تلفن:
دانشکده: دانشکده مهندسی

مشخصات پژوهش

عنوان
Constitutive Modeling of 2024 Aluminum Alloy Based on the Johnson–Cook Model
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
2024 aluminum alloy, Hot compression deformation, Constitutive equation, Johnson–cook model
پژوهشگران سجاد رسائی (نفر اول)، امیرحسین میرزایی (نفر دوم)

چکیده

In this paper, hot compression behavior of Al2024 in the temperatures range of 573–723 K and strain rate range of 0.001–0.6 s−1 was studied based on standard tests. The prediction of flow stress was performed using constitutive equations based on the basic and modified Johnson–Cook model, and the accuracy of the proposed models was estimated by statistical error analysis method. Based on the experimental results, flow stress got changed significantly with changes in the strain rate and temperature. Since the basic model could not examine the correlated effects of the parameters, it had inadequate exactness to estimate the flow stress especially at high temperatures. During calculation, the constants in the modified model, effects of hardening and softening behavior were included in addition to considering the correlated effects of the parameters, so the accuracy of the modified model was increased significantly.