کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5019921 1369637 2017 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Coherent gradient sensing method for measuring thermal stress field of thermal barrier coating structures
ترجمه فارسی عنوان
روش سنجش شبیه ساز همگن برای اندازه گیری زمینه استرس حرارتی ساختارهای پوشش محافظتی حرارتی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی


- Coherent gradient sensing method is applied to measure the thermal deformations of thermal barrier coatings at high temperature.
- The thermal stress field through the entire thermal barrier coatings system is obtained by experiment and finite element method (FEM) analysis.
- The residual stress due to the spraying procedure is proved to have little effect on the substrate deformation.

Coherent gradient sensing (CGS) method can be used to measure the slope of a reflective surface, and has the merits of full-field, non-contact, and real-time measurement. In this study, the thermal stress field of thermal barrier coating (TBC) structures is measured by CGS method. Two kinds of powders were sprayed onto Ni-based alloy using a plasma spraying method to obtain two groups of film-substrate specimens. The specimens were then heated with an oxy-acetylene flame. The resulting thermal mismatch between the film and substrate led to out-of-plane deformation of the specimen. The deformation was measured by the reflective CGS method and the thermal stress field of the structure was obtained through calibration with the help of finite element analysis. Both the experiment and numerical results showed that the thermal stress field of TBC structures can be successfully measured by CGS method.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Theoretical and Applied Mechanics Letters - Volume 7, Issue 1, January 2017, Pages 13-16
نویسندگان
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