압전필름 센서에 의한 사각 중공 보의 변형률 분포 측정 = Distributed Strain Measurement of Thin-walled Rectangular Beams Using PVDF Film Sensors

다국어 초록 (Multilingual Abstract)

PVDF film sensors were applied to measure the distributed strain of 3 thin-walled rectangular beams. The strain calibration of this film sensor was performed by an aluminum beam test. 7 PVDF film sensors were attached on each thin-walled rectangular beam beside each conventional electronic strain gage. These beams were loaded under the 3 point bending test condition. The strains from the PVDF sensors were well correlated with those from the electric strain gages. The sound beam was shown as the symmetric strain distribution according to the beam length. However the strain distribution of the defected beam had changed from that of the sound beam. Therefore, the strain distribution change can be used as a parameter of structural integrity monitoring.