کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1785157 1023302 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Definition of a new thermal contrast and pulse correction for defect quantification in pulsed thermography
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک اتمی و مولکولی و اپتیک
پیش نمایش صفحه اول مقاله
Definition of a new thermal contrast and pulse correction for defect quantification in pulsed thermography
چکیده انگلیسی

It is well known that the methods of thermographic non-destructive testing based on the thermal contrast are strongly affected by non-uniform heating at the surface. Hence, the results obtained from these methods considerably depend on the chosen reference point. The differential absolute contrast (DAC) method was developed to eliminate the need of determining a reference point that defined the thermal contrast with respect to an ideal sound area. Although, very useful at early times, the DAC accuracy decreases when the heat front approaches the sample rear face. We propose a new DAC version by explicitly introducing the sample thickness using the thermal quadrupoles theory and showing that the new DAC range of validity increases for long times while preserving the validity for short times. This new contrast is used for defect quantification in composite, Plexiglas™ and aluminum samples.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Infrared Physics & Technology - Volume 51, Issue 3, January 2008, Pages 160–167
نویسندگان
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