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Steel and Composite Structures   Volume 29, Number 1, October10 2018, pages 139-149
Damage identification in laminated composite plates using a new multi-step approach
Narges Fallah, Seyed Rohollah Hoseini Vaez and Hossein Fasihi

Abstract     [Buy Article]
    In this paper a new multi-step damage detection approach is provided. In the first step, condensed modal residual vector based indicator (CMRVBI) has been proposed to locate the suspected damaged elements of structures that have rotational degrees of freedom (DOFs). The CMRVBI is a new indicator that uses only translational DOFs of the structures to localize damaged elements. In the next step, salp swarm algorithm is applied to quantify damage severity of the suspected damaged elements. In order to assess the performance of the proposed approach, a numerical example including a three-layer square laminated composite plate is studied. The numerical results demonstrated that the proposed CMRVBI is effective for locating damage, regardless of the effect of noise. The efficiency of proposed approach is also compared during both steps. The results demonstrate that in noisy condition, the damage identification approach is capable for the studied structure.
Key Words
    multi-step approach; damage identification; CMRVBI; Salp Swarm Algorithm; structures involved rotational DOFs
Department of Civil Engineering, Faculty of Engineering, University of Qom, Qom, Iran.

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