کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7120109 1461459 2018 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Development of comprehensive heterodyne effect based inspection (CHEBI) method for inclusive monitoring of cracks
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی کنترل و سیستم های مهندسی
پیش نمایش صفحه اول مقاله
Development of comprehensive heterodyne effect based inspection (CHEBI) method for inclusive monitoring of cracks
چکیده انگلیسی
Early detection of developing structural cracks is extremely important in improving safety and reducing maintenance costs in structural, aerospace, chemical, petrochemical, gas, and oil industries. Nonlinear structural health monitoring methods, such as wave modulation spectroscopy (NWMS), can detect the cracks in their early stages of development. Such methods usually rely on the combination of a high and a low-frequency, vibro-acoustic, excitation for defect detection. However, a priori knowledge of the characteristics of the crack is required for selection of the appropriate frequency combination. In this study, the Comprehensive Heterodyne Effect Based Inspection (CHEBI) method is proposed to address this issue. The CHEBI method applies ascending and descending broadband frequency sweeps simultaneously to study the response of the structure in wide ranges of frequencies in the time-frequency domain. Therefore, it eliminates the need for multiple experimental tests to find appropriate combinations of the high and the low-frequency components. The proposed method detected cracks from 1 mm to 25 mm in length on a dog-bone shaped aluminum specimen. These results confirm that the CHEBI can be successfully applied for detection of cracks with varying severities without the need for adjustment of the excitation frequencies.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Measurement - Volume 128, November 2018, Pages 89-95
نویسندگان
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