کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
277621 1430241 2014 22 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermomechanical modelling of a NiTi SMA sample submitted to displacement-controlled tensile test
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Thermomechanical modelling of a NiTi SMA sample submitted to displacement-controlled tensile test
چکیده انگلیسی

Shape Memory Alloys (SMAs) undergo an austenite–martensite solid–solid phase transformation which confers its pseudo-elastic and shape memory behaviours. Phase transformation can be induced either by stress or temperature changes. That indicates a strong thermo-mechanical coupling. Tensile test is one of the most popular mechanical test, allowing an easy observation of this coupling: transformation bands appear and enlarge giving rise to a large amount of heat and strain localisation. We demonstrate that the number of transformation bands is strongly associated with the strain rate. Recent progress in full field measurement techniques have provided accurate observations and consequently a better understanding of strain and heat generation and diffusion in SMAs. These experiments bring us to suggest the creation of a new one-dimensional thermomechanical modelling of the pseudo-elastic behaviour. It is used to simulate the heat rise, strain localisation and thermal evolution of the NiTi SMA sample submitted to tensile loading.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Solids and Structures - Volume 51, Issue 10, 15 May 2014, Pages 1901–1922
نویسندگان
, , , ,