CRACK DETECTION IN BEAMS USING AXIAL AND TRANSVERSE NATURAL FREQUENCIES | ||
| The International Conference on Applied Mechanics and Mechanical Engineering | ||
| Article 20, Volume 16, 16th International Conference on Applied Mechanics and Mechanical Engineering., May 2014, Pages 1-18 PDF (332.97 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/amme.2014.35543 | ||
| Authors | ||
| M. M. Mostafa1; M. Tawfik2; H. M. Negm3 | ||
| 1Ph.D. Student, Aerospace Engineering Department, Cairo University, Giza, Egypt. | ||
| 2Assistant Professor, Aerospace Engineering Department, Cairo University, Giza, Egypt. | ||
| 3Professor of aircraft structures, Aerospace Engineering Department, Cairo University, Giza, Egypt. | ||
| Abstract | ||
| ABSTRACT Crack detection in structures has attracted the researchers for many years. Several crack detection attempts use measurements of the structure’s modal parameters, like the natural frequencies and mode shapes. One of The easiest parameter among them to measure and correlate to cracks is the natural frequencies. Several approaches focused on crack detection in beams and bars using the changes in the natural frequencies. The direct problem has been addressed, but the inverse problem is a challenging one, where it starts by measuring certain structural properties and estimate the crack location and size. In most research works, the natural frequencies of the intact structure or historical measurements have to be known in advance. Another feature in similar studies is to handle the beam action and bar action separately. The inverse problem of an Euler-Bernoulli beam with an open crack is addressed here. Unlike these models, the present model utilizes the first axial and transverse natural frequencies to determine the size and location of the crack, without prior historical measurements. | ||
| Keywords | ||
| structural health monitoring; Crack Detection; Modal analysis; Euler-Bernoulli Beam | ||
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