Damage Location of Fiber-Reinforced Composites Based on Lumped Mass Approach

doi:10.12068/j.issn.1005-3026.2020.02.015

Abstract

Abstract: A method for locating the damage of fiber-reinforced composites(FRCs) is studied， which is named as the ‘exponential approximation-lumped mass approach’. Firstly， a lumped mass model is established for a FRCs beam structure. Then， the stiffness matrix of the undamaged beam is obtained by theoretical calculation， and the residual force vector of the beam with damage is determined as the key locating index based on the measured natural frequencies and the regularized modal shape data. Furthermore， a criterion is proposed for approximating the position of damage， so that a set of standard procedures for the damage locating can be determined. Finally， a T300 carbon fiber/resin composite beam with different fiber breakage damages is studied as a case and it is found that the as-proposed damage locating approach can effectively identify the damage positions of the composite beam.

Key words: objective, interval particle, intervallumped mass approach, exponential approximation, fiber-reinforced composite, residual force vector, damage location

CLC Number:

TB535

LI Hui， XU Zhong-hao， WANG Dong-sheng， ZU Xu-dong. Damage Location of Fiber-Reinforced Composites Based on Lumped Mass Approach[J]. Journal of Northeastern University Natural Science, 2020, 41(2): 234-240.

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