کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
785632 1466143 2007 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Investigation of ratcheting characteristics of modified 9Cr–1Mo steel by using the Chaboche constitutive model
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Investigation of ratcheting characteristics of modified 9Cr–1Mo steel by using the Chaboche constitutive model
چکیده انگلیسی

In this paper, an inelastic constitutive equation of the Chaboche model, which can simulate ratcheting behaviour at high temperatures, is investigated for modified 9Cr–1Mo steel. The plastic modulus, which primarily governs the calculation scheme for plasticity, is derived for the Chaboche model and implemented into a computer program with the radial return algorithm to compute the cyclic backstress components. With the cyclic test data of modified 9Cr–1Mo steel, the Chaboche three-decomposed constitutive parameters of the kinematic hardening rule and the isotropic softening rule, which controls the cyclic softening characteristic of modified 9Cr–1Mo steel, are identified by a simple method. By using the identified constitutive parameters, the ratcheting behaviour of modified 9Cr–1Mo steel is simulated to investigate the effects of mean stress levels at a certain stress amplitude and ratcheting parameter's values. In particular, the progressive deformation instability phenomena due to the cyclic softening characteristics of modified 9Cr–1Mo steel are investigated.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Pressure Vessels and Piping - Volume 84, Issue 5, May 2007, Pages 284–292
نویسندگان
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