Abstract
For the beam with certain degree, it was difficult to reflect by displacement modal and natural frequency. The present paper first derived nodal strain modal through its corresponding displacement modal, and then evaluates the strain modal, both prior and post damage, the difference between the strain mode was used as a criterion to assess the damage experienced, based on a simple beam element damage localization method. The formulated method had been demonstrated through ANSYS numerical modeling to be capable of effectively identifying the damage.
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