Crack Detection in a Cantilever Composite Beam Using Fuzzy Logic System with Regression Analysis

Composite structures in their service life subjected to various static and dynamic loadings. Static loading leads to noticeable permanent deformation in structures. Hence, failure can be predictable earlier. On the contrary, dynamic loading develops fluctuating stresses. Fluctuating stress leads to initiation of fatigue crack in composite structures. Fatigue crack initiation and its propagation are main cause of failures. Prier detection of crack and its severity is essential to avoid catastrophic failure of structure. Available conventional damage detection methods are time taking, expensive and may require unassembled from machines. Hence, now, more emphasis is given on unconventional methods. In this work, a damage detection method is introduced through fuzzy logic system (FLS) and regression analysis (RA). Statistical process control methods are applied, and investigations made on a cantilever composite beam with a crack. A data pool has been extracted from analytical method. Then, the search space was trained by that proposed methodology to get damage location. The result of the proposed methodology found within the permissible limit.