| Abstract: | Abstract: This paper presents 3D electronic speckle pattern interferometry (ESPI) measurement results of strain components at the end of a carbon‐fibre reinforced polymer (CFRP) plate adhesively bonded to a reinforced concrete beam. To minimise speckle decorrelation because of the inevitable rigid‐body motion of the measured specimen, the load was increased in small increments. Two evaluation schemes are compared: the step‐by‐step addition of the measured displacement components and regain of the correlation by image shifting. Strain is evaluated by interpolating the in‐plane displacement measurements along selected lines, and is compared with results from finite element analysis (FEA). An uncertainty estimate is given. |
