Damage Assessment of a Non-Homogeneous Uniform Strength Beam using Genetic Algorithm

S.K. Panigrahi, S. Chakraverty, and B.K. Mishra (India)


Mathematical Modeling, Damage Parameter, Simulation, Non-homogeneity, Uniform Strength Beam.


Uniform strength beams are having various engineering applications such as leaf springs in automotive industries. Such beams undergo very large deflection in comparison to beam of uniform cross section. In general, these beams fail due to fatigue loading. Damage assessment in such type of beams is becoming increasingly important in order to determine their safety and reliability. The analysis of such beam becomes complicated due to its geometry. However, it becomes much more complicated when it is made up of non-homogeneous material. In this paper, the location and quantification of the extent of damage is performed with genetic algorithms along with the residual force method. First of all the governing equations for a uniform strength beam with homogeneous material properties have been discussed briefly. Then the damage identification of a uniform strength beam with non homogeneous material has been considered. The developed model requires experimentally determined data as input and detects the location and extent of the damage in the beam. Here, numerically simulated data imposed with different noise levels using finite element models of structures are used to identify the damage. The damage factors obtained are compared with the theoretical one and found to have a good agreement.

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