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Title of Journal: Exp Mech

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Abbravation: Experimental Mechanics

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Springer US

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DOI

10.1007/s12152-015-9239-2

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ISSN

1741-2765

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A Hybrid Wavelet Based–Approach and Genetic Algori

Authors: S A Ravanfar H Abdul Razak Z Ismail S J S Hakim
Publish Date: 2016/06/06
Volume: 56, Issue: 8, Pages: 1411-1426
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Abstract

This paper proposes an optimized damage identification method in beamlike structures using genetic algorithm GA without baseline data For this purpose a vibrationbased damage identification algorithm using a damage indicator called ‘Relative Wavelet Packet Entropy’ RWPE was implemented to determine the location and extent of damage The procedure does not require vibration signals from an undamaged structure because the method of comparing signals from different locations in the existing state was found to be effective To ameliorate the algorithm GA was utilized to identify the best choice for “mother wavelet function” and “decomposition level” of the signals by means of the fundamental fitness function to optimize the algorithm This resulted in the high accuracy of the damage identification algorithm In addition this method has eliminated the difficulties in selecting the type of mother wavelet function for damage identification purposes To investigate the robustness and accuracy of the proposed method numerical examples and experimental cases with different damage depths were considered and conducted The results demonstrated that the proposed method has great potential in the identification of damage location and depth of cut in beamlike structures since it does not require the recorded data from an undamaged beam as a baseline for damage detection Moreover the relationship between damage location and depth of damage has been evaluated and results showed that the algorithm can be applied to actual structures


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  2. Dynamic Separation of Resistance Spot Welded Joints: Part II—Analysis of Test Results and a Model
  3. Hydrodynamic Interactions at Low Reynolds Number
  4. Impact of Experimental Uncertainties on the Identification of Mechanical Material Properties using DIC
  5. New Developments in Proton Radiography at the Los Alamos Neutron Science Center (LANSCE)
  6. A Tensile Split Hopkinson Bar for Testing Particulate Polymer Composites Under Elevated Rates of Loading
  7. Mechanical Properties of Ti-6Al-4V Selectively Laser Melted Parts with Body-Centred-Cubic Lattices of Varying cell size
  8. Hybrid Thermoelastic Stress Analysis of a Pinned Joint
  9. Experimental Testing of a Moving Force Identification Bridge Weigh-in-Motion Algorithm
  10. Sensitivity to Axial Stress of Electro-Mechanical Impedance Measurements
  11. Accuracy of the Sampling Moiré Method and its Application to Deflection Measurements of Large-Scale Structures
  12. Modification of the Shear-Compression Specimen for Large Strain Testing
  13. Analysis of Cracks and Deformations in a Full Scale Reinforced Concrete Beam Using a Digital Image Correlation Technique
  14. Slip Damping Mechanism in Welded Structures Using Response Surface Methodology
  15. Effect of Varying Test Parameters on Elastic–plastic Properties Extracted by Nanoindentation Tests
  16. Application of Digital Image Correlation (DIC) in Dynamic Notched Semi-Circular Bend (NSCB) Tests
  17. Experimental Methodology for Studying Strain Heterogeneity with Microstructural Data from High Temperature Deformation
  18. Tailoring Beam Mechanics Towards Enhancing Detection of Hazardous Biological Species
  19. Strain Measurements Through Optimized Particle Tracking in Volumetric Images: Methodology and Error Assessment
  20. Comparison between Digital Fresnel Holography and Digital Image-Plane Holography: The Role of the Imaging Aperture
  21. Principle and Experimental Validation of a new Apparatus Allowing Large Deformation in Pure Bending: Application to thin Wire
  22. Dynamic Separation of Resistance Spot Welded Joints: Part I—Experiments
  23. Non-Newtonian Behavior of Ballistic Gelatin at High Shear Rates
  24. Designing a Uniaxial Tension/Compression Test for Springback Analysis in High-Strength Steel Sheets

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