کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5018504 | 1467430 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
1D cyclic yield model independent of load spectrum characteristics and its application to Inconel 718
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کلمات کلیدی
area reductionεpINCONEL 718Applied Stress - استرس اعمال شدهBack stress - استرس برگشتFlow function - تابع جریانCost function - تابع هزینهBalance - تعادلlow cycle fatigue - خستگی چرخه کمStress amplitude - دامنه استرسStrain amplitude - دامنه فشارelongation - طول عمرYoung modulus - مدول جوانconstitutive equations - معادلات ساختاریUltimate strength - مقاومت کششی نهاییStrain rate - نرخ کرنش Softening - نرم کردنstrain ratio - نسبت فشارPoisson’s ratio - نسبت پواسون
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
At room temperature, nickel-based superalloy Inconel 718 softens under fully reversed plastic deformation cycles. Chaboche's unified constitutive equations have been previously used in the literature to predict nickel-based superalloy cyclic softening behavior. To better fit our results, the constitutive equations were modified to account for continuous softening. Moreover, applying the model to results gathered from two different loading spectrum indicates that the isotropic evolution is solely dependent on the accumulated plastic strain and can be applied to a variety of number of cycles and strain amplitudes combinations without adjusting the parameters. This new information is significant and has a considerable impact on material testing and modeling. It implies that a unique set of parameters extracted from any fully reversed strain controlled test can characterize the material flow stress evolution with accumulated plastic strain independently of the strain sequence, for RÉ=â1. This flexible prediction method could lead to significant experimental costs reductions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Mechanics of Materials - Volume 109, June 2017, Pages 34-41
Journal: Mechanics of Materials - Volume 109, June 2017, Pages 34-41
نویسندگان
T. Klotz, S. Blas, M. Lévesque, M. Brochu,