کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1563894 999624 2009 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On stresses induced in a thermal barrier coating due to indentation testing
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
پیش نمایش صفحه اول مقاله
On stresses induced in a thermal barrier coating due to indentation testing
چکیده انگلیسی
Instrumented indentation has been suggested as a method to determine interfacial fracture toughness of thermal barrier coatings. However, in a previous experimental study we showed that the results are ambiguous. In this work, we investigate the experimental results by numerical simulations incorporating the material microstructure. In the numerical simulations, based on finite element analyses, the stress fields that are associated with the loading and unloading of the indenter are investigated. By comparing these stress fields to the damage observed in the experimental study, including crack path and interfacial delaminations, we explain key findings from the experimental observations. Our results suggest that indentation testing of multilayered coated structures might not induce the delamination in the overall weakest interface and therefore the test results must be evaluated with care.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computational Materials Science - Volume 44, Issue 4, February 2009, Pages 1178-1191
نویسندگان
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